Grey water treatment technology for graded gasification furnace

A treatment process and technology for a gasifier, which is applied in the field of coal gasification ash water gasification ash water by coal-water slurry gasification, can solve the problems of cumbersome process operation, complicated structure, energy waste and the like, and achieves simplified process flow, process simplification, The effect of reducing investment

Inactive Publication Date: 2008-11-19
山西丰喜肥业(集团)股份有限公司临猗分公司
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Problems solved by technology

[0006] The present invention provides an ash water treatment process applied to a staged gasifier in order to solve the problems of complex structure, waste of energy, cumbersome process operation and the like existing in the prior art

Method used

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  • Grey water treatment technology for graded gasification furnace
  • Grey water treatment technology for graded gasification furnace

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Embodiment Construction

[0012] The process flow shown in Figure 1: a gray water treatment process applied to a graded gasifier, including the following steps, the black water discharged from the graded gasifier and the synthesis gas scrubber is decompressed through their respective pipelines and then enters the high-pressure flash The operating pressure of steam tank 1 and high-pressure flash tank 1 is 150°C and 0.5 MPa. The liquid phase from the high-flash flash in high-pressure flash tank 1 enters vacuum flash tank 6 through a pressure reducing valve for secondary flash evaporation. The operating pressure of the steam tank 6 is 80°C, 0.05MPa (A) (A represents absolute pressure), and the liquid phase flashed out of the vacuum flash tank 6 enters the settling tank relatively lower than the vacuum flash tank 6 by gravity. , the gray water after settlement is recycled; the gas phase from the high-flash flash tank 1 enters the high-flash tank top separator 2 for gas-liquid separation, and part of the sep...

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Abstract

The invention belongs to the ash water processing technology for gasification of coal water slurry in gasified ash water, in particular relating to an ash water processing technique applied in a staged gasification furnace. The technique solves the problems in the prior art of complex structure, energy waste, trivial technological operation and so on. The method comprises the following steps that: black water exhausted from the staged gasification furnace and a syngas scrubber respectively enters into a high-pressure flash tank after decompressed by respective pipes; liquid phase after high-flash flash evaporation in the high-pressure flash tank passes through a pressure-reducing valve and enters into a vacuum flash tank for secondary flash evaporation; the liquid phase after vacuum flash evaporation in the vacuum flash tank enters into a settling tank the position of which is lower than that of the vacuum flash tank for settlement by means of gravity action; gas phase after high-flash flash evaporation in the high-pressure flash tank enters into a separator on the top of the high-flash tank for gas-liquid separation; and one part of separated gas phase enters into a deaerator and directly contacts the ash water for heat exchange, and the other part of the steam enters into a steam buffer tank through a pressure control valve. Compared with the prior flow, the adoption of the flow saves equipment investment by 3 million; and about 10 tons of steam is supplied in normal operation.

Description

technical field [0001] The invention belongs to the coal gasification ash water gasification ash water treatment technology, in particular to an ash water treatment process applied to a graded gasification furnace. Background technique [0002] The clean and efficient utilization of coal is a major technical issue in the field of energy and environmental protection in my country today, and it is also one of the key technologies for the sustainable development of my country's national economy. Coal gasification is the main way to convert primary energy into clean secondary energy. Its products are fuel gas (coal gas), synthetic gas, reducing gas, hydrogen, and carbon monoxide. How to effectively utilize various by-product energy generated by gasification It is the key to reduce the operating cost of the device. At present, there are mainly two representative types of gasification technologies using entrained bed: the gasifier using coal-water slurry as raw material is Texaco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/06
Inventor 韩喜民宋利马宏波樊少波
Owner 山西丰喜肥业(集团)股份有限公司临猗分公司
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