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Residual pressure energy recovery system and method for coal gasification black water treatment system

A technology of treatment system and recovery system, applied in the field of energy recovery or energy conversion, can solve problems such as the influence of system operation stability, the difficulty of turbine structure design, and the influence of turbine operation, so as to improve the operation state and improve the level of energy recovery. , The effect of reducing equipment loss

Active Publication Date: 2016-07-13
BEIJING AEROSPACE PROPULSION INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that the high temperature, non-condensable gas, and solid particles of the black water medium cause difficulties in the design of the turbine structure. At the same time, the non-condensable gas is precipitated during the flow of the turbine during depressurization, and the high-temperature water may flash under the local low-pressure flow conditions in the turbine. , The energy matching state of the system has an impact on the operation of the turbine, and the black water pressure and flow control have an impact on the stability of the system operation

Method used

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  • Residual pressure energy recovery system and method for coal gasification black water treatment system

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Embodiment 1

[0026] Such as figure 1 As shown, the residual pressure energy recovery system for the coal gasification black water treatment system of the present invention includes a vaporizer 1, a slag breaker 2, a flow regulating valve 3, a hydraulic turbine 4, and a pressure regulating valve 5. , High-pressure flash tank 6, deaeration tank 7, pressure regulating valve two 8, heat exchanger 9, washing tower 10, ejector 11, quench water pump 12, washing tower feed pump 13, load equipment 14.

[0027] The lower black water outlet of the vaporization furnace 1 is connected to the inlet of the high-pressure flash tank 6 through two parallel pipelines. One pipeline is provided with a flow regulating valve 3, a hydraulic turbine 4, a pressure regulating valve 5, and the other pipeline Set pressure regulating valve 2 8; hydraulic turbine 4 is connected to load equipment 14; it divides the black water energy into two parts: residual pressure energy and heat energy above the saturation pressure of w...

Embodiment 2

[0041] Such as figure 1 As shown, a method for recovering residual pressure energy for a coal gasification black water treatment system according to the present invention, in which oxygen, pulverized coal or coal water slurry is burned in the vaporizer 1 to form crude gas;

[0042] The black water coming out of the lower part of the vaporization furnace 1 passes through the flow regulating valve 3 to adjust the flow and then enters the hydraulic turbine 4, and recovers the residual pressure energy through the hydraulic turbine 4, thereby driving the load equipment 14; the black water coming out of the hydraulic turbine 4 The water enters the high-pressure flash tank 6 after the pressure is adjusted by the pressure regulating valve 5, and the high-pressure flash tank 6 is used to flash vaporize to recover heat; there is also a pressure regulating valve between the vaporizer 1 and the high-pressure flash tank 6 Two 8 spare pipelines.

[0043] The pressure of the vaporization furnace...

Embodiment 3

[0045] Such as figure 1 As shown, the method for recovering residual pressure energy of a coal gasification black water treatment system according to the present invention includes the following steps:

[0046] (a) Oxygen and pulverized coal enter the gasification furnace 1 and burn to form crude coal gas, which enters the scrubber 10 through the ejector 11;

[0047] (b) The black water from the lower part of the vaporization furnace 1 passes through the flow regulating valve 3, the hydraulic turbine 4, and the pressure regulating valve 5, and then enters the high-pressure flash tank 6. Part of the water forms low-pressure steam and at the same time precipitates non-condensable gas; The power turbine recovers residual pressure energy to drive the load device 14; the load device 14 is a generator or a pump or other rotating equipment.

[0048] (c) The steam containing non-condensable gas from the high-pressure flash tank 6 enters the heat exchanger 9 for heating the water from the sc...

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Abstract

The invention provides a residual pressure energy recovery system and method for a coal gasification black water treatment system.A black water outlet on the lower portion of a gasification furnace is connected with an inlet of a high-pressure flashing tank through two pipelines which are in parallel connection, a flow adjusting valve, a hydraulic turbine and a first pressure adjusting valve are sequentially arranged on one of the pipelines, a second pressure adjusting valve is arranged on the other one pipeline, and the hydraulic turbine is connected with loading equipment.Black water energy is divided into residual pressure energy higher than saturation pressure of water and heat energy, the heat energy is recovered by the high-pressure flashing tank through flashing gasification, and the residual pressure energy is recovered by the hydraulic turbine.By using the residual pressure energy recovery system and method, energy recovery level of the coal gasification wet-process dedusting black water treatment system is improved, device energy consumption is lowered, and improving of running state of the pressure adjusting valves (also known as flashing valves) and lowering of equipment loss are facilitated.

Description

Technical field [0001] The invention belongs to the field of energy recovery or energy conversion, and specifically relates to a residual pressure energy recovery system and method for a coal gasification black water treatment system, which is suitable for the recovery of pressure energy in the wet dust removal process system of a coal gasification unit, and the recovered energy is available Used to drive pumps or generators and other rotating equipment. Background technique [0002] Coal gasification is the core technology for the clean utilization of coal. Whether it is pulverized coal pressurized gasification, coal water slurry pressurized gasification and other gasification processes, the produced crude gas must be dedusted and purified, of which wet dust removal is a coal gasification process One of the most widely used dust removal methods. Wet dust removal has the characteristics of stable operation and low equipment cost. Although the black water is fully recovered thro...

Claims

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Application Information

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IPC IPC(8): C10J3/48F01D15/08F01D15/10C10K1/10
CPCC10J3/485C10J2300/0933C10J2300/0959C10J2300/1615C10K1/101F01D15/08F01D15/10Y02P20/10
Inventor 吴玉珍赵钊张彦军丛建华冉治通郝开元张春雷于槟恺于继胜曹耀
Owner BEIJING AEROSPACE PROPULSION INST