Cleaning and anti-scaling process without shut-down of gas-gas heater (GGH) and device thereof

A cleaning device and process technology, which is applied in the field of cleaning and scale inhibition, can solve the problems of increasing the unplanned shutdown assessment pressure of power plants and reducing the power generation revenue of power plants, so as to achieve the effects of safe and stable operation of production equipment, avoiding economic penalties, and avoiding damage

Inactive Publication Date: 2014-07-16
江苏肯创环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional solution is to shut down for mechanical jet cleaning or chemical cleaning after disassembly, so cleaning means shutting down, which increases the pressure of unplanned shutdown of the power plant and reduces the power generation revenue of the power plant

Method used

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  • Cleaning and anti-scaling process without shut-down of gas-gas heater (GGH) and device thereof
  • Cleaning and anti-scaling process without shut-down of gas-gas heater (GGH) and device thereof
  • Cleaning and anti-scaling process without shut-down of gas-gas heater (GGH) and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A 1000MW unit is equipped with an online cleaning device and a high-pressure flushing device on the GGH system. The online cleaning device includes: a dosing device and a chemical spraying device. The output of the dosing device is connected to the The medicine spraying device is connected; the high-pressure flushing device includes a high-pressure water outlet 11 and a high-pressure water spraying device 13 connected through a high-pressure water pipeline 12;

[0038] The process described is: under the condition that the surface of the heat exchange element is kept moist, control the frequency of medication, calculate the pre-coating amount of the agent and the spraying amount of the agent, spray the agent for 15 minutes according to the calculated amount, and after the interval of 15 minutes after the spraying of the agent, Use the medicament spray device to replenish water. After 5 consecutive replenishments, start the high-pressure flushing device and rinse for 60 m...

Embodiment 2

[0052] A 300MW unit is equipped with an online cleaning device and a high-pressure flushing device on the GGH system. The online cleaning device includes: a dosing device and a chemical spraying device. The output of the dosing device is connected to the The medicine spraying device is connected; the high-pressure flushing device includes a high-pressure water outlet 11 and a high-pressure water spraying device 13 connected through a high-pressure water pipeline 12;

[0053] The process described is: under the condition that the surface of the heat exchange element is kept moist, control the frequency of medication, calculate the pre-coating amount of the agent and the spraying amount of the agent, spray the agent for 15 minutes according to the calculated amount, and after the interval of 15 minutes after the spraying of the agent, Use the medicament spray device to replenish water. After 5 consecutive replenishments, start the high-pressure flushing device and rinse for 60 mi...

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Abstract

The invention discloses a cleaning and anti-scaling process without shut-down of a gas-gas heater (GGH). A GGH system is provided with an on-line cleaning device and a high-pressure flusher, the on-line cleaning device comprises a medicating device and a medicine spraying device, the output end of the medicating device is connected with the medicine spraying device, and the high-pressure flusher comprises a high-pressure water outlet and a high-pressure water spraying device connected through a high-pressure water pipe. The process includes: the surface of a heating element is guaranteed to be moist, medication frequency is controlled, medicine pre-filling quantity and medicine spraying quantity are calculated, medicine enters to be sprayed for 5-30 minutes according to calculation quantity, an interval is 5-30 minutes after medicine spraying is finished, the medicine spraying device is used for supplementing water, water supplement is performed for 1-5 times continuously, the high-pressure washer is started, washing is performed for 30-60 minutes, the water supplement quantity is 0.01-0.5 time of the total quantity of medicine, and the medication frequency is controlled in 5-20 days.

Description

technical field [0001] The present invention relates to the field of cleaning and scale inhibition, in particular to the process of cleaning and scale inhibition of the flue gas heat exchanger (hereinafter referred to as GGH) in the limestone / gypsum wet flue gas desulfurization process and its process. the device used. Background technique [0002] With the operation of the GGH desulfurization system, the heat exchange surface of the GGH often has different degrees of dust accumulation and scaling, which will seriously cause blockage and affect the normal and safe operation of the desulfurization system. In particular, environmental protection requires the desulfurization system to cancel the bypass, and the operation of GGH will directly affect the safe operation of the desulfurization system and the main engine. Scaling is almost inevitable in the desulfurization system installed with GGH. Therefore, cleaning the GGH has become a maintenance work that the owner must face....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28G9/00
Inventor 吴凡杨晓良方忠华张军
Owner 江苏肯创环境科技股份有限公司
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