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Patent Searching and Data


Title:
A CHEMICAL MIXING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/035708
Kind Code:
A1
Abstract:
A chemical mixing system (100) comprises: a mixing line (110), to produce mixture; a production line (120), to supply the mixture to a production site from the mixing line (110); a return line (130), to return excess mixture to the mixing line (110); a plurality of sensors (140), disposed in all the lines (110, 120, 130), to measure different parameters of the mixture; and, a flow regulating means (150), to maintain the different parameters of the mixture within a pre-set range, characterized in that, a control unit (160), connected to the sensors (140), receives the measured parameters of the mixture from the sensors (140); and, a processor (170) is connected to the control unit (160) and the flow regulating means (150), has a user interface for receiving the pre-set range of parameters from a user, and manages the operation of the flow regulating means (150), based on the measured parameters such that pre-set parameters of the mixture is maintained.

Inventors:
ANG, Vincent Main Seah (MPLEX TECHNOLOGY SDN BHD, NO. 18, JALAN SUNGAI TIRAM 7, MUTIARA LIGHT INDUSTRIAL PARK,, BAYAN LEPAS, PULAU PINANG, 11920, MY)
Application Number:
MY2018/050044
Publication Date:
February 21, 2019
Filing Date:
July 06, 2018
Export Citation:
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Assignee:
MPLEX TECHNOLOGY SDN BHD (NO. 18, JALAN SUNGAI TIRAM 7 MUTIARA LIGHT INDUSTRIAL PARK, BAYAN LEPAS, PULAU PINANG, 11920, MY)
International Classes:
B01F3/08
Foreign References:
US20060211897A12006-09-21
US5924794A1999-07-20
US20170189869A12017-07-06
Attorney, Agent or Firm:
LOK, Choon Hong (PINTAS CONSULTING GROUP SDN BHD, NO. 19, JALAN SS 1/36, PETALING JAYA, SELANGOR, 47300, MY)
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Claims:
A chemical mixing system (100) comprising:

a mixing line (110), for producing mixture;

a production line (120), for supplying the mixture to a production site from the mixing line (110);

a return line (130), for returning excess mixture to the mixing line

(110);

a plurality of sensors (140), disposed in all the lines (110, 120, 130), for measuring different parameters of the mixture; and,

a flow regulating means (150), for maintaining the different parameters of the mixture within a pre-set range,

characterized in that, a control unit (160), connected to the sensors (140), receives the measured parameters of the mixture from the sensors (140); and, a processor (170), is connected to the control unit (160) and the flow regulating means (150), has a user interface for receiving the pre-set range of parameters from a user, and manages the operation of the flow regulating means (150) based on the measured parameters such that pre-set parameters of the mixture is maintained.

A chemical mixing system (100) according to claim 1, wherein the mixing line (110) comprising:

a chemical tank (111);

a water tank;

a mixing pump (112) connected to the chemical tank (111) and water tank, receives the contents from the respective tanks, for homogenous mixing of the contents and supplying the homogenous mixture to a mixing tank (113); and,

the mixing tank (113), stores the homogenous mixture received from the mixing pump (112).

3. A chemical mixing system (100) according to claims 1 or 2, wherein the production line (120) comprising:

a pump (121) arranged in the production line for pumping the mixture from the mixing tank (113) to the production site; and,

a filter (122), arranged for draining the mixture manually

4. A chemical mixing system (100) according to anyone of claims 1 to 3, wherein the sensors (140) used are flow sensor, conductivity sensor, proximity sensor, pressure gauges or any other suitable sensor.

5. A chemical mixing system (100) according to anyone of the claims 1 to 4, wherein the return line (130) includes a flow meter (140f) arranged in it to detect the volume of the excess mixture.

6. A chemical mixing system (100) according to anyone of the claims 1 to 5, wherein the mixing pump (112), pumps the mixture to the mixing tank (113) when the level of the mixture in the mixing tank (113) indicates low.

7. A chemical mixing system (100) according to anyone of the claims 1 to 6, wherein the mixing pump (112), halts the process of mixing when the level of mixture in the mixing tank (113) indicates high.

8. A chemical mixing system (100) according to the claim 1, further comprises a flow meter to calculate and record the consumption of the mixture in the production line (120) and the return line (130).

9. A chemical mixing system (100) according to any one of the preceding claims, further comprises an alarm in the mixing line to trigger when the content in the chemical tank (111) is detected low.

10. A chemical mixing system (100) according to any one of the preceding claims, further comprises a flow switch in the production line (120) to prevent the pump (121) from dry running.

Description:
A CHEMICAL MIXING SYSTEM

FIELD OF THE INVENTION This invention relates to a mixing system and more particularly to an automated chemical mixing system.

BACKGROUND OF THE INVENTION Mixing systems are used in variety of industrial applications to blend/mix one or more components or constituents to a desired concentration with an accuracy. Existing chemical mixing systems are manual system consisted of tanks and circulation systems. Chemical and DI water were measured manually using beakers and poured into the tanks. Pumps were used to mix the chemical and DI water in the mixing tanks. The mixture was tested for homogeneous mixing through the collection of some samples in a beaker. When the mixture was deemed to be homogeneously mixed, the mixture from the mixing tank is supplied to the production site. Excess mixture is returned to the mixing tank and then, supplied out, again, to the production site.

Therefore, it is the intention of the present invention to provide a mixing system capable of automatically mixing the components according to pre-set parameters and maintain the parameters of the mixture throughout the process. SUMMARY OF THE INVENTION

The present invention provides a chemical mixing system comprises: a mixing line, to produce mixture; a production line, to supply the mixture to a production site from the mixing line; a return line, to return excess mixture to the mixing line; a plurality of sensors, disposed in all the lines, to measure different parameters of the mixture; and, a flow regulating means, to maintain the different parameters of the mixture within a pre-set range, characterized in that, a control unit, connected to the sensors, receives the measured parameters of the mixture from the sensors; and, a processor is connected to the control unit and the flow regulating means, has a user interface for receiving the pre-set range of parameters from a user, and manages the operation of the flow regulating means based on the measured parameters such that pre-set parameters of the mixture is maintained.

Preferably, the mixing line comprises a chemical tank; a water tank; a mixing pump connected to the chemical tank and water tank, receives the contents from the respective tanks to perform homogenous mixing of the contents and supply the homogenous mixture to a mixing tank; and, the mixing tank, to store the homogenous mixture received from the mixing pump.

Preferably, the production line comprises a pump arranged in the production line to pump the mixture from the mixing tank to the production site; and, a filter, arranged to drain the mixture manually.

Preferably, the sensors used are conductivity sensor, proximity sensor, pressure gauges or any other suitable sensor. Preferably, the return line may include a flow meter arranged in it to detect the excess mixture.

Preferably, the mixing pump may pump the mixture to the mixing tank when the level of the mixture in the mixing tank indicates low.

Preferably, the mixing pump may halt the process of mixing when the level of mixture in the mixing tank indicates high.

Further, flow meters may be disposed to calculate and record the consumption of the mixture in the production line and return line.

Further, an alarm can be arranged in the mixing line to trigger when the content in the chemical tank is detected low.

Further, a flow switch may be arranged in the production line to prevent the pump from dry running.

BRIEF DESCRIPTION OF DRAWINGS

These and other features, aspects, and advantages of the present invention will become better understood, when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:

Fig. 1 illustrates a schematic diagram of a mixing system, in accordance to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring to figure 1, is a schematic diagram of an automated chemical mixing system (100) comprises a mixing line (110), a production line (120), a return line (130), a plurality of sensors (140), a flow regulating means (150), a control unit (160) and a processor (170). All these components are arranged on a slid tray.

In a first embodiment, the mixing line (110) comprises of a chemical tank (111), a water supply tank which can be a deionized (DI) water supply tank, a mixing pump (112), and a mixing tank (113) arranged on the mixing line (110) to produce a mixture. The contents from the chemical tank (111) and DI water tank are chemicals and DI water respectively, and are channelled to the mixing pump (112) for homogenous mixing to produce homogenous mixture. The homogenous mixture is further channelled to the mixing tank (113) which stores the mixture temporarily. A flow meter, arranged in the mixing line (110), measures the volume of chemical and DI water supplied to the mixing pump (112). A magnetic float sensor (140a) is arranged on the mixing tank (113) to indicate the mixture levels at HH, H, M, L and LL in the mixing tank (113). When the mixture level indicates at L or LL, more mixture is channelled into the mixing tank (113) from the mixing pump (112). When the mixture level indicates at H or HH, the process of the mixing pump (112) is halted until more mixture is required. A leak detection sensor (140g) is incorporated to prevent the overflow of chemical, DI water or the mixture on the slid tray.

In a second embodiment, the production line (120) supplies the mixture from the mixing tank (113) to the production site and comprises of a pump (121), a filter housing with drain (122), and sensors (140). The pump (121) is either a single motor pump or dual motor pump, which prevents the supply of the mixture from down time. The sensors (140) disposed in the production line are pressure gauge (140b), differential pressure transmitter (140c), flow meter (140d) and conductivity sensor (140e). The two pressure gauges are disposed at, one before filter (122) housing with manual drain and another one after it, to monitor the filter (122) for any defect. The pressure transmitter (140c) detects whether the pressure in the pipes is below or above the setting point to protect the pipes. The flow meter (140d) and conductivity sensor (140e) are arranged in continuation to the production site to collect the pH, temperature, conductivity and flow rate of the mixture which are recorded in the control unit (160). These sensors (140) are connected to the control unit (160) either by wired or wireless communication. Further, a flow switch is arranged in the production line (120) to avoid the pump (121) from dry run.

In a third embodiment, the return line (130) channels the excess mixture back to the mixing tank (113) arranged in the mixing line (110) from the production site whenever excess flow rate of the mixture is detected by the sensor (140), which is a flow meter (140f). The measured parameter is sent to the control unit (160). The measured parameters transmitted from the two flow meters, incorporated in the production line (120) and the return line (130) respectively, are used to calculate and record the consumption of the mixture in the production site.

In a fourth embodiment, the control unit (160), which is further connected to the processor (170), receives parameters transmitted from a plurality of sensors (140) and checks the parameters of the homogenous mixture based on the pre-set parameters and the processor (170) accordingly. The flow regulating means (150) is of a plurality of valves arranged in the mixing line (110), production line (120) and the return line (130) to regulate the flow of the mixture and maintain the parameters of the mixture. The valves used in the three lines are not limited to diaphragm valve, sampling valve and drain valve. The processor (170), connected to the flow regulating means (150), controls the operation of the flow regulating means (150) such that desired pre-set parameters is maintained throughout the process. The processor (170), has a user interface to receive the pre-set range of parameters of the mixture to be maintained throughout the process from a user. The sensors (140) disposed in the mixing line (110), production line (120) and return line (130) are connected to the control unit (160) either by wireless or wired communication. The parameters of the mixture flowing in these lines are measured by the sensors (140) and the measured data is transmitted to the control unit (160). The measured data is further transmitted to the processor (170). Based on the received parameters, the processor (170) provides instructions to control the operation of the flow regulating means (150) such that desired pre-set parameters is maintained and the whole process is controlled automatically. The parameters of the mixtures are pre-set in the processor (170) for each task performed. The processor (170), based on the received parameters, controls the flow regulating means (150) arranged in the mixing line (110) in order to supply required dose of the chemical and the DI water to the mixing pump (112) to prepare homogenous mixture by mixing the liquids. Further, based on the received parameters from the sensors (140) in the production line (120), the processor (170) controls the flow regulating means (150) in the production line (120) such that desired parameters range of the mixture is maintained. Furthermore, the processor (170), based on the received parameters from the flow meter, controls the flow regulating means (150) in the return line and returns the excess mixture to mixing tank (113). The processor (170), is also programmed to monitor and control the entire operation of the mixing system (100) automatically, such that desired parameters of the mixture is maintained throughout the process. In an alternative embodiment, the mixing system (100) comprises a dual mixing tank (113), having first and second mixing tanks. If the proximity sensor in the first mixing tank (113) indicates L or LL level, the mixture from the second mixing tank is supplied to the production line (120). More mixture from the mixing pump (112) is dosed into the first mixing tank, and then, supplied to the production site when the level of mixture in the second mixing tank indicates L or LL.

In a further embodiment, the automated chemical mixing system (100) includes an alarm, triggered when level of chemical content is low in the chemical tank (111). Simultaneously, the mixing pump (112) halts the dosing process to prevent dry run and resumes the dosing process when the chemical tank (111) is refilled. A heat exchanger is incorporated into the mixing system (100) to generate heat to the DI water. The method for mixing chemicals by using the automated mixing system (100) comprises steps of: supply the chemical from the chemical tank (111) and the DI water from the DI water supply as per instructed dosage by the processor (170) to the mixing pump (112). Perform mixing and blending of the chemical and the DI water, by the mixing pump (112) to prepare a mixture. Supply the prepared mixture to the mixing tank (113), for temporary storage. Channel the mixture to the production site from the mixing tank (113) via the production line (120). Return the excess mixture back to the mixing tank (113) via the return line (130). Sense the parameters of the mixture supplied to the production site by using the sensors (140). Receive the data collected by the sensors (140) by the control unit (160) and further transmit the data to the processor (170). Check for the parameters of the mixture whether the desired parameters of the mixture is supplied to the production site. Control the dosage supply of the chemical and DI water based on the received parameters from the sensors (140).

The present invention may be embodied in other specific forms without departing from its essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore indicated by the appended claims rather than by the foregoing description. All changes, which come within the meaning and range of equivalency of the claims, are to be embraced within their scope.