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A Coal Gasifier Wastewater Treatment and Resource Utilization Process

A technology for wastewater treatment and resource utilization, applied in the field of water treatment, can solve the problems of high turbidity and hardness of gray water, fouling and blockage of equipment and pipelines, and equipment shutdown, so as to reduce the hardness of gray water, realize recycling and stable operation. Effect

Active Publication Date: 2021-06-25
大连东道尔膜技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country's existing coal gasification technology generally has the problem of high turbidity and hardness of gray water reused by coal gasification. Even if a large amount of scale inhibitor and dispersant is added, the problem of scaling and blockage of equipment and pipelines cannot be solved, and it is often caused by system scaling. Device shutdown
At the same time, for the existing process, the effect of water purification can indeed be achieved, but there are other discharges

Method used

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  • A Coal Gasifier Wastewater Treatment and Resource Utilization Process
  • A Coal Gasifier Wastewater Treatment and Resource Utilization Process
  • A Coal Gasifier Wastewater Treatment and Resource Utilization Process

Examples

Experimental program
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Effect test

Embodiment 1

[0025] This embodiment provides a coal gasifier wastewater treatment and resource utilization process, including the following steps:

[0026] Step 1: Pretreating the coal gasification gray water, the pretreatment produces effluent and sewage, and the sewage can be discharged outside;

[0027] Step 2: The effluent after pretreatment enters the adsorption device, part of the effluent from the adsorption device returns to the original water tank for recycling, and part of it enters the desalination device.

[0028] Step 3: Analyze the adsorbent through the analysis device, recover the adsorbent, and generate analysis waste liquid, including inorganic waste liquid and organic waste liquid, inorganic waste liquid desalination tank, and organic waste liquid to pyrolysis device.

[0029] Step 4: The desalination device recovers the salt in the gray water, the water from the desalination device is used as flushing water for process instruments, and finally returns to the original wat...

Embodiment 2

[0037] Such as Figure 1-2 As shown, this embodiment provides a coal gasifier wastewater treatment and resource utilization device, including: wastewater treatment equipment and resource utilization equipment;

[0038] The wastewater treatment equipment includes a raw water tank, a pretreatment device, an adsorption device, an analysis device, a pyrolysis device, a desalination device, and a salt tank; the raw water tank is connected to one end of the pretreatment device through an outlet pipe, and the pretreatment device The other end is connected to the adsorption device. The outlet pipe of the adsorption device is divided into two paths, one of which is connected back to the original water tank, and the other is connected to the bottom of the desalination device. The water outlet of the desalination device is connected back to the original water tank. The concentrated water outlet is connected to the analysis device; an analysis liquid circulation pipeline is arranged betwe...

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Abstract

The invention discloses a coal gasification furnace wastewater treatment and resource utilization process, comprising the following steps: step 1: pretreatment; step 2: effluent enters an adsorption device, part of the effluent from the adsorption device returns to the original water tank for recycling, and part of it enters the desalination device ; Step 3: The analysis device analyzes the adsorbent; Step 4: The desalination device recovers the salt in the gray water; Step 5: The analyzed brine enters the salt tank, and enters the resource process through the salt tank; Step 6: In the resource process, first Through the magnesium removal reactor; Step 7: Calcium removal device produces calcium carbonate precipitation due to the introduction of sodium hydroxide and carbon dioxide; Step 8: A part of the sodium chloride solution is used as a resolving agent, and the other part is used to make alkali again; Step 9: Chlorination Sodium reacts with the added ammonia water and carbon dioxide to produce ammonium chloride and sodium bicarbonate. This process can reduce the hardness of gray water, realize the recycling of coal gasification gray water, do not use chemicals, reduce environmental pollution, and save a lot of water resources.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a coal gasification furnace wastewater treatment and resource utilization process. Background technique [0002] The treated gray water of the coal gasification unit can be reused in the system, which can reduce the water replenishment of the system and reduce the amount of discharge to the environment. The external discharge of the coal gasification device accounts for more than 80% of the external discharge of the chemical plant, and its treatment and reuse can save a lot of water resources. my country's existing coal gasification technology generally has the problem of high turbidity and hardness of gray water reused by coal gasification. Even if a large amount of scale inhibitor and dispersant is added, the problem of scaling and blockage of equipment and pipelines cannot be solved, which is often caused by system scaling. The device stops. At the same time, for the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C01F5/14C01F11/18C02F103/34
CPCC01F5/14C01F11/18C02F1/001C02F1/28C02F1/442C02F1/444C02F1/461C02F1/5236C02F9/00C02F2103/34C02F2303/16
Inventor 姬保江姬克瑶
Owner 大连东道尔膜技术有限公司