Title:
BOILER SUPERHEATED STEAM TEMPERATURE CONTROL METHOD, DEVICE AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/165839
Kind Code:
A1
Abstract:
Provided are a boiler superheated steam temperature control method, device and system. The temperature control method comprises the following steps: step 1: acquiring an outlet temperature of a present-level desuperheater and an outlet temperature of a present-level superheater; step 2: calculating a temperature feedforward value of the present-level desuperheater; step 3: calculating a temperature deviation value of an outlet of the present-level superheater; and step 4: sending a result of adding the temperature feedforward value and the temperature deviation value to a PID controller, and controlling the water spray amount of the present-level desuperheater by means of the PID controller. By means of the method, the temperature change trend of superheated steam, after passing through a desuperheater, in a superheater system can be reflected more truly and accurately, so that a controller precisely prejudges and controls the water spray amount of the desuperheater, and finally, a superheated steam temperature is maintained within a range required for boiler operation.
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| JPH0387505 | DESUPERHEATING DEVICE |
| JP3453639 | WETNESS CONTROLLER FOR WET STEAM |
| WO/2001/088435 | PROCESS FOR HEATING STEAM |
Inventors:
ZHANG XI (CN)
GENG GUO (CN)
PARKER SIMON ANTHONY (CN)
GENG GUO (CN)
PARKER SIMON ANTHONY (CN)
Application Number:
PCT/CN2018/124152
Publication Date:
September 06, 2019
Filing Date:
December 27, 2018
Export Citation:
Assignee:
DP CLEANTECH HONG KONG LTD (CN)
International Classes:
F22G5/12; F22B35/00
Foreign References:
| CN108386829A | 2018-08-10 | |||
| CN102607006A | 2012-07-25 | |||
| CN107506010A | 2017-12-22 | |||
| CN105114931A | 2015-12-02 | |||
| CN107218594A | 2017-09-29 | |||
| CN205640875U | 2016-10-12 | |||
| US4241701A | 1980-12-30 |
Attorney, Agent or Firm:
KINGSOUND & PARTNERS (CN)
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