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Coal gasification black water treatment system and treatment process

A technology of treatment system and treatment process, which is applied in the field of coal gasification black water treatment system and treatment process, can solve the problems of poor heat and power recovery, heavy equipment maintenance workload, long process flow, etc. The effect of reducing the amount of maintenance and shortening the process flow

Pending Publication Date: 2020-07-28
陕西聚能新创煤化科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the technical problems of poor heat and power recovery effect, long process flow, large equipment maintenance workload and high investment in the existing coal gasification black water treatment, the present invention provides a coal gasification black water treatment system and treatment process, which can effectively recover black water The waste heat can recover black water power, and through gray water separation and vacuum separation in the same separation tank, the separated dissolved gas can be recovered and used as process gas; thus realizing the recycling of waste heat, power and dissolved gas, the process flow is short , the cooling and dynamic consumption of the system can be reduced, the operation and maintenance workload is low, the equipment is less and the investment is small

Method used

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  • Coal gasification black water treatment system and treatment process

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Effect test

Embodiment 1

[0041] see figure 1 , The coal gasification black water treatment system includes a deaeration water heater 1, a vortex separator 2, a hydraulic deaeration water pump 3, a hydraulic turbine pump 4, a separation tank 5, an atmospheric gas cooler 6, and a vacuum gas cooler 9 and separator 11.

[0042] see figure 1 , in this embodiment, the deaeration water heater 1 is connected to the vortex separator 2 and the hydraulic deaeration water pump 3 through pipelines respectively; the top of the vortex separator 2 is connected to the hydraulic turbine pump 4 and the separation tank in turn through pipelines 5 connected; the hydraulic turbine pump 4 and the hydraulic deaeration water pump 3 are coaxially connected; the bottom end of the vortex separator 2 is connected to the separator 11 and the separation tank 5 through pipelines; the top end of the separator 11 is connected to the normal pressure gas cooler 6 are connected; the top of the separation tank 5 is connected with the no...

Embodiment 2

[0053] The coal gasification black water treatment system that present embodiment provides, its processing technology comprises the following steps:

[0054] 1) Reduce the heat in the black water to be treated by heat exchange, and recover the heat carried in the black water;

[0055] 2) step 1) the black water after cooling is roughly separated to obtain fine slag water and clear water,

[0056] After the clean water passes through the energy recovery equipment to recover part of the kinetic energy in the clean water, proceed to step 3);

[0057] The fine slag water directly enters step 3) to achieve separation or directly use the separation equipment to achieve separation; the saturated steam carried in the fine slag water is separated, and then the saturated steam is further cooled to obtain gas and condensed water, the gas is reused as process gas, and the condensed water Deoxygenated water is obtained through deoxidation; fine slag water separated from saturated steam is...

Embodiment 3

[0073] The coal gasification black water treatment system that present embodiment provides, its processing technology comprises the following steps:

[0074] 1) Reduce the heat in the black water to be treated by heat exchange, and recover the heat carried in the black water;

[0075] 2) step 1) the black water after cooling is roughly separated to obtain fine slag water and clear water,

[0076] After the clean water passes through the energy recovery equipment to recover part of the kinetic energy in the clean water, proceed to step 3);

[0077] The fine slag water is directly separated by the separation equipment; the saturated steam carried in the fine slag water is separated, and then the saturated steam is further cooled to obtain gas and condensed water, the gas is reused as process gas, and the condensed water is deoxidized to obtain deoxygenated water; Separation and removal of fine slag water from saturated steam is sent to slag removal;

[0078] 3) Atmospheric pre...

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Abstract

The invention belongs to the technical field of coal chemical industry and relates to a coal gasification black water treatment system and a treatment process. The treatment comprises a deoxygenated water heater, a vortex separator, a hydraulic deoxygenated water pump, a hydraulic turbine pump, a separation tank, a normal-pressure gas cooler and a vacuum gas cooler, wherein the deoxygenated waterheater is connected with the vortex separator; the top end of the vortex separator is connected with the separation tank through the hydraulic turbine pump; and the bottom end of the vortex separatoris connected with the separation tank and the separator; heat and kinetic energy in the black water are recycled separately, the heat is recycled into a carbon washing tower, and the kinetic energy serves as a part of power source of the hydraulic deoxygenated water pump; the low-temperature black water with heat recovered is further separated after being subjected to coarse separation; and the separated saturated steam can be recycled as process gas. According to the invention, heat, kinetic energy and steam in the black water can be recycled, so that the cold consumption and kinetic consumption of the black water of the system can be reduced, the operation and maintenance workload is low, the process flow is short, the equipment is less, and the investment is small.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and relates to a coal gasification black water treatment system and a treatment process. Background technique [0002] At present, in coal chemical gasification, three-stage or four-stage flash evaporation is mostly used to recover the waste heat of gasification black water, and at the same time reduce the pressure to facilitate subsequent slag-water separation and water purification. The process is long, and the equipment is large and bulky. The heat recovery is poor, the power consumption is large, the investment is large, and the workload of operation and maintenance is large. Contents of the invention [0003] Aiming at the technical problems of poor heat and power recovery effect, long process flow, large equipment maintenance workload and high investment in the existing coal gasification black water treatment, the present invention provides a coal gasification black water t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
CPCC02F9/00C02F2303/10C02F1/00C02F1/38C02F1/04C02F1/52C02F2301/063Y02P20/10
Inventor 刘东波
Owner 陕西聚能新创煤化科技有限公司
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