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Coal gasification ash water vacuum flash evaporation descaling system

A vacuum and flash evaporation technology, which is applied in the direction of water pollutants, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of large area of ​​settlement tank, easy scaling of equipment and pipelines, unstable operation, etc., to achieve The effect of reducing investment and floor area, shortening the settlement time, and ensuring operation stability

Pending Publication Date: 2020-09-11
BEIJING QING CHUANG JIN HUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For this reason, the present invention provides a coal gasification gray water vacuum flash descaling system to solve the unstable operation of the coal gasification gray water vacuum flash system in the prior art, the equipment and pipelines are prone to scaling, and the settling tank occupies a large area. , high-level investment issues

Method used

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  • Coal gasification ash water vacuum flash evaporation descaling system

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] like figure 1 As shown, a coal gasification gray water vacuum flash descaling system in this embodiment includes a vacuum flash tank 1, a mixed dosing tank 3, a settling tank 6, a vacuum flash condenser 7, a flocculant tank 8 and Descaling agent tank 11, the gas phase outlet of vacuum flash tank 1 is communicated with the inlet of vacuum flash condenser 7 through pipeline, and the liquid phase outlet of vacuum flash tank 1 is communicated with the inlet of mixing dosing tank 3 through pipeline, mixing and adding The outlet of the medicine tank 3 is connected with the inlet of the settling tank 6 through a pipeline, the outlet of the flocculant tank 8 is connected with the inlet of the mixed dosing tank 3 through a pipeline, and the outlet of the descaling agent tank 11 is connected with the inlet of the mixed dosing tank 3 through a pipeline connected.

[0032] The technical effect achieved by this embodiment is: the mixing and dosing tank 3 of this embodiment can be u...

Embodiment 2

[0034] like figure 1 As shown, a kind of coal gasification gray water vacuum flash descaling system in this embodiment includes all the technical features in Embodiment 1, in addition, it also includes a settling feed pump 5, a mixing dosing tank 3 and The pipeline between the settling tanks 6 is provided with a settling feed pump 5; it also includes a flocculant pump 10, and the pipeline between the flocculant tank 8 and the mixing dosing tank 3 is provided with a flocculant pump 10; it also includes a descaling agent Pump 13, the pipeline between the descaling agent tank 11 and the mixing dosing tank 3 is provided with a descaling agent pump 13.

[0035]The beneficial effects of this embodiment are: the inlet of the subsidence feed pump 5 in this embodiment is set at the bottom of the mixing and dosing tank 3, and the pressure of the mixing and dosing tank 3 is normal pressure during normal operation, and the requirements for the NPSH of the pump Generally, ordinary chemica...

Embodiment 3

[0037] like figure 1 As shown, a coal gasification gray water vacuum flash descaling system in this embodiment includes all the technical features in Embodiment 2, in addition, it also includes a mixing and dosing agitator 4, a mixing and dosing tank 3 A mixing and dosing agitator 4 is provided inside; a flocculant agitator 9 is provided in the flocculant tank 8; a descaling agent agitator 12 is provided in the descaling agent tank 11 Agent agitator 12, wherein, mixing dosing agitator 4, flocculant agitator 9 and descaling agent agitator 12 all realize its rotation stirring by electric motor.

[0038] In some optional embodiments, the settling tank 6 is also provided with a settling agitator, and the settling agitator is driven by a motor.

[0039] The beneficial effects of this embodiment are: by setting the flocculant agitator 9, the stirring of the materials in the flocculant tank 8 is realized; by setting the descaling agent agitator 12, the stirring of the materials in t...

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Abstract

The invention discloses a coal gasification ash water vacuum flash evaporation descaling system. A gas phase outlet of a vacuum flash tank is communicated with an inlet of a acuum flash condenser through a pipeline; a liquid phase outlet of the vacuum flash tank is communicated with an inlet of a mixing and dosing tank through a pipeline, an outlet of the mixing and dosing tank is communicated with an inlet of a settling tank through a pipeline, an outlet of a flocculating agent tank is communicated with an inlet of the mixing and dosing tank through a pipeline, and an outlet of a descaling agent tank is communicated with an inlet of the mixing and dosing tank through a pipeline. The coal gasification ash water vacuum flash evaporation descaling system has the effects that coal gasification ash water is treated by the method; the ash water from the vacuum flash tank, a descaling agent and a flocculating agent are uniformly mixed in the mixing and dosing tank and then are conveyed to the settling tank to be clarified and settled, and fine ash and silicon, aluminum, calcium and magnesium ion precipitates contained in the water are removed, so that scaling of pipelines and equipment of the ash water treatment system can be slowed down, and the service life of the equipment is prolonged. Equipment operation period and stability of the ash water treatment system are improved, and investment of the ash water treatment system is reduced.

Description

technical field [0001] The invention relates to the technical field of coal gasification gray water treatment, in particular to a coal gasification gray water vacuum flash descaling system. Background technique [0002] At present, in the gray water treatment of coal gasification, vacuum flash tanks and settling tanks are often used to cool down and flocculate the fine ash in the gray water. Mix with the flocculant, then enter the settling tank to settle the fine ash, the concentrated gray water at the bottom of the settling tank is discharged and then filtered to remove the fine ash in the gray water, so as to reduce the fine ash content in the gray water. [0003] There are two main problems in the operation: first, the contact time between the flocculant and the gray water is very short, and the pipeline mixer cannot contact and mix the fine ash in the gray water and the flocculant well, which requires passing Prolonging the settling time to solve the problem will lead t...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F101/10
CPCC02F9/00C02F1/06C02F1/5281C02F5/08C02F1/56C02F1/66C02F2101/10C02F2101/101C02F2301/063
Inventor 马宏波李相军岳博裴世钊张本凤
Owner BEIJING QING CHUANG JIN HUA TECH CO LTD
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