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Flue-gas desulfurizing engineering high-temperature flue-gas controlling system and controlling method thereof

A technology of temperature control system and high-temperature flue gas, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles. It can solve the problems of threatening the safety of the chimney and damaging the anti-corrosion layer on the inner wall of the chimney, so as to achieve reliable system operation and reduce operation and maintenance. Cost, Effect of Feasible Setup

Inactive Publication Date: 2008-02-20
邓生毛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a flue gas desulfurization project that can effectively cool down the high-temperature flue gas of the boiler that enters the chimney through the desulfurization island bypass baffle before entering the chimney The high-temperature flue gas temperature control system and the method for controlling the flue gas temperature are used to solve the problem that high-temperature flue gas directly enters the chimney through the desulfurization island bypass baffle, damages the anti-corrosion layer on the inner wall of the chimney, and threatens the safety of the chimney

Method used

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  • Flue-gas desulfurizing engineering high-temperature flue-gas controlling system and controlling method thereof
  • Flue-gas desulfurizing engineering high-temperature flue-gas controlling system and controlling method thereof
  • Flue-gas desulfurizing engineering high-temperature flue-gas controlling system and controlling method thereof

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Embodiment 1

[0060] A high-temperature flue gas temperature control system for a flue gas desulfurization project based on the "basic technical scheme" and a method for controlling the temperature of high-temperature flue gas.

[0061] As shown in Figure 2: the high-temperature flue gas temperature control system of the flue gas desulfurization project includes a water spray device I, a flue gas temperature and spray water pressure monitoring device II and a control device III;

[0062] The water spray device I installed in the flue behind the bypass baffle of the desulfurization island is composed of an external water source / water supply pipe 1, a ring water supply pipe 2 for the water spray device, 2 electric control valves 3 for the spray layer and electric regulation for the spray layer Valve actuator 4, 8 spray layer mist water nozzles 5; 2 spare spray layer electric regulating valves 7 and their actuators 8, 8 spare spray layer mist water nozzles 9, outlet pipe 10, outlet pipe Compos...

Embodiment 2

[0103] A high-temperature flue gas desulfurization project based on the "simplified technical solution" A temperature control system and a method for controlling the temperature of high-temperature flue gas.

[0104] The "simplified technical solution" of the second embodiment is different from the "basic technical solution" of the first embodiment in that: the "simplified technical solution" does not have a temperature sensor and a pressure sensor; the electric control valve is changed to an electric valve.

[0105] As shown in Figure 3: the high-temperature flue gas temperature control system of the flue gas desulfurization project of this "simplified technical solution" includes water spraying device I A and control gear III A .

[0106] The water spray device I A The setting principle is the same as that of the water spray device in the "basic technical plan", but the spray layer electric regulating valve and its actuator of the "basic technical plan" use the spray lay...

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Abstract

The present invention relates to a high temperature flue gas temperature control system of the flue gas desulphurization engineering, the FGD-HFGTC system for short, comprising a water spray device and a control device arranged in the flue which is behind the bypassing baffle of a desulphurization island, the water spray device consists of a water supply pipe, an electrically operated valve, a water nozzle, a spraying sewage rising pipe and a rising pipe electrically operated valve; the control device is a programmable controller PLC or a distributed control system DCS or other controllers. The method of controlling the temperature of the flue gas is as follows: when the temperature of the flue gas is higher than the set point of the safe temperature which is endured by the antiseptic layer, the FGD-HFGTC system receives an external signal( the instruction of the desulphurization island control system or the main frame control system), the system is automatically put into operation, the control device instructs the water spray system spraying the low temperature water to the high temperature flue gas in the flue, reducing the temperature of the flue gas, protecting the antiseptic layer which is arranged in the internal wall of the chimney; when the external signal is disappeared, the FGD-HFGTC system comes into a standby state. The FGD-HFGTC system is also capable of protecting the antiseptic layer arranged in the flue which is behind the bypassing baffle of a desulphurization island at the same time.

Description

technical field [0001] The invention relates to an industrial general automatic control device and a control method thereof, in particular to a high-temperature flue gas temperature control system (referred to as: FGD-HFGTC system) and a control method thereof in a flue gas desulfurization project. Background technique [0002] At present, the relatively mature and economical desulfurization solution in desulfurization projects is the limestone-gypsum desulfurization process. After desulfurization, the net flue gas temperature is lower than the acid dew point (the sulfuric acid dew point temperature is 120 degrees) and the moisture content is relatively large, which is lower than the acid dew point. The water-containing flue gas is extremely corrosive, and can corrode the inner wall of the chimney in a very short time, posing a great threat to the safety of the chimney. Therefore, every desulfurization project needs to carry out anti-corrosion on the chimney. [0003] One of...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50
Inventor 邓生毛
Owner 邓生毛
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