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Bypass flue gas spray drying desulphurization waste water processing apparatus and method thereof

A technology of desulfurization wastewater and bypass flue, which is applied in the field of environmental engineering, can solve the problems of high maintenance costs, complex membrane technology systems, and increased disposal costs, and achieve the effects of no maintenance, light nozzles, and reduced scaling

Active Publication Date: 2018-10-12
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The flue spray evaporation technology has serious fouling and blockage in the flue, which affects the operation of the main engine; the membrane technology system is complicated, the investment is high, and the membrane modules need to be replaced regularly, which leads to increased maintenance costs. -30 yuan / ton, a large amount of sludge containing heavy metals will be generated, which will increase the cost of disposal

Method used

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  • Bypass flue gas spray drying desulphurization waste water processing apparatus and method thereof
  • Bypass flue gas spray drying desulphurization waste water processing apparatus and method thereof
  • Bypass flue gas spray drying desulphurization waste water processing apparatus and method thereof

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Effect test

Embodiment 1

[0036] A bypass flue gas flow spray drying desulfurization wastewater treatment method, the flue gas comes from the boiler air preheater, the temperature is about 120 ℃, the device is composed of a flue gas air distributor 3, an air flow nozzle 4, and an air flow spray tower 5, The lower part of the flue gas distributor 3 is connected to the upper part of the airflow spray tower 5, and the airflow nozzle 4 is set on the inner axis of the airflow spray tower 5, separated from the flue gas distributor 3 by 100-500mm, and the flue gas distributor 3 A flue gas flowmeter is installed on the inlet flue to control the regulating valve 9 on the main flue. The waste water entering the airflow nozzle 4 is fed by the waste water pump 2. The measuring temperature of meter 15 is regulated, and the temperature regulation range of outlet smoke temperature meter 15 is 90-100 ℃. There is a fly ash inlet 51 on the top of the straight barrel of the airflow spray tower 5, and the fly ash inlet 51...

Embodiment 2

[0038] A bypass flue gas flow spray drying desulfurization wastewater treatment method and device, the flue gas comes from the boiler economizer, after the SCR is out of stock, the temperature is about 350 ℃, and the resistance of the air preheater is greater than the resistance of the spray tower when the boiler is operating under normal load conditions , open the regulating valve 9, adjust the second switching valve 10, the measurement value of the flue gas flow meter 13 entering the spray tower can reach the set value, and when the operation is under low load conditions, the resistance of the air preheater is smaller than the resistance of the spray tower. Open the second on-off valve 10, adjust and control the regulating valve 9 on the main flue, and also realize that the measurement value of the flue gas flow meter 13 entering the spray tower reaches the set value; the temperature adjustment range of the outlet flue gas temperature meter 15 is also 90- 100°C.

Embodiment 3

[0040]The bypass flue airflow spray drying desulfurization wastewater treatment device consists of a flue gas distributor 3, an airflow nozzle 4, and an airflow spray tower 5. The lower part of the flue gas distributor 3 is connected to the upper part of the airflow spray tower 5, and the airflow nozzle 4 Set on the inner central axis of the air-flow spray tower 5, separated from the flue gas distributor 3 by 100-500mm, the flue gas flow meter 13 is installed on the inlet flue of the flue gas distributor 3, and controls the regulating valve 9 on the main flue The waste water entering the airflow nozzle 4 is sent in by the waste water pump 2, and the flow rate of the waste water pump 2 is regulated by the metering temperature of the outlet smoke thermometer 15 arranged at the bottom of the airflow spray tower 5. The top of the airflow spray tower 5 is provided with a fly ash inlet 51, and the fly ash inlet 51 is connected tangentially to the airflow spray tower 5 straight cylind...

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Abstract

The invention discloses a bypass flue gas spray drying desulphurization waste water processing apparatus and a method thereof. The apparatus comprises an air-flow spraying tower, a flue gas wind distributor arranged at the upper part of the air-flow spraying tower and connected with the air-flow spraying tower, an air-flow nozzle arranged at a central line in the air-flow spraying tower, a waste water pot connected with an air-flow nozzle feed inlet, a deduster connected with the lower part of the air-flow spraying tower, a first ash bin and a second ash bin respectively connected with two ends of the lower part of the deduster, a positive air seal machinery connected with an ash outlet of the second ash bin, and a Roots blower and an air-outlet pipe connected with the lower part of the positive air seal machinery. A fly ash inlet is arranged at the top of a straight tube of the air-flow spraying tower, the fly ash inlet and the straight tube of the air-flow spraying tower are tangentially connected, and the fly ash in the air-flow spraying tower spirally downward sprays. The operation cost is low, no fouling and wall scaling is generated, the system operation is reliable, operation of a boiler main body is not influenced, and the operation is stable and reliable.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and relates to a treatment device and method for desulfurization wastewater of a coal-fired power plant. Background technique [0002] The "Technical Regulations for Wastewater Treatment Design of Thermal Power Plants" promulgated in 2006 has clearly stated that the desulfurization wastewater treatment facilities of thermal power plants should be set up separately, and priority should be given to treatment and reuse, without discharge outlets, and zero discharge of wastewater must be achieved. Desulfurization wastewater is the terminal wastewater of power plants, and the water quality is the worst. Desulfurization wastewater mainly contains calcium, magnesium and chloride ions. The high content of chloride ions makes the desulfurization wastewater unable to meet the reuse water standard through biochemical treatment. [0003] The advantages and disadvantages of flue spray evaporation tec...

Claims

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Application Information

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IPC IPC(8): C02F1/12C02F103/18
CPCC02F1/12C02F2103/18C02F2201/002C02F2201/007Y02A20/141
Inventor 葛仕福周彩玲沈越
Owner SOUTHEAST UNIV
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