阅读说明：本技术 一种共用排气过滤器的干煤粉气化除灰装置 (Dry coal powder gasification ash removal device sharing exhaust filter ) 是由 樊强 许世森 贾会林 任永强 陶继业 刘刚 李小宇 刘沅 陈智 王鹏杰 罗丽珍 于 2021-01-19 设计创作，主要内容包括：本发明公开了一种共用排气过滤器的干煤粉气化除灰装置；含灰合成气管道的出口与飞灰过滤器的入口相连通,飞灰过滤器的顶部出口与洁净合成气管道相连通,飞灰过滤器的底部出口与飞灰储罐的入口相连通,飞灰储罐的底部出口与飞灰锁斗的入口相连通,飞灰锁斗的底部出口与飞灰气提罐的入口相连通,飞灰气提罐的底部出口与飞灰筒仓的入口相连通,飞灰筒仓的底部出口与外接的飞灰排出管道相连通。通过共用一个排气过滤器和反吹系统,省去了各级排气过滤系统,将飞灰锁斗、飞灰气提罐及飞灰筒仓的排气全部通入排气过滤器中进行过滤并反吹,结构简单,节省设备投资,降低框架高度,同时减少反吹氮气的用量。(The invention discloses a dry coal powder gasification ash removal device sharing an exhaust filter; the outlet of the ash-containing synthetic gas pipeline is communicated with the inlet of the fly ash filter, the outlet of the top of the fly ash filter is communicated with the clean synthetic gas pipeline, the outlet of the bottom of the fly ash filter is communicated with the inlet of the fly ash storage tank, the outlet of the bottom of the fly ash storage tank is communicated with the inlet of the fly ash lock hopper, the outlet of the bottom of the fly ash lock hopper is communicated with the inlet of the fly ash gas stripping tank, the outlet of the bottom of the fly ash gas stripping tank is communicated with the inlet of the fly ash silo, and the outlet of the bottom of the fly ash silo. By sharing one exhaust filter and a back flushing system, all stages of exhaust filtering systems are saved, and the exhaust of the fly ash lock hopper, the fly ash gas stripping tank and the fly ash silo is completely introduced into the exhaust filter for filtering and back flushing, so that the structure is simple, the equipment investment is saved, the frame height is reduced, and the consumption of back flushing nitrogen is reduced.)

1. A dry coal powder gasification ash removal device with a common exhaust filter is characterized by comprising an ash-containing synthetic gas pipeline, a fly ash filter (1), a clean synthetic gas pipeline, a fly ash storage tank (2), a fly ash lock hopper (3), a fly ash stripping tank (4) and a fly ash silo (5);

the outlet of the ash-containing synthetic gas pipeline is communicated with the inlet of a fly ash filter (1), the outlet of the top of the fly ash filter (1) is communicated with a clean synthetic gas pipeline, the outlet of the bottom of the fly ash filter (1) is communicated with the inlet of a fly ash storage tank (2), the outlet of the bottom of the fly ash storage tank (2) is communicated with the inlet of a fly ash lock bucket (3), the outlet of the bottom of the fly ash lock bucket (3) is communicated with the inlet of a fly ash stripping tank (4), the outlet of the bottom of the fly ash stripping tank (4) is communicated with the inlet of a fly ash silo (5), and the outlet of the bottom of the fly ash silo (5) is communicated with an externally-connected; the top outlet of the fly ash lock hopper (3), the top outlet of the fly ash gas stripping tank (4) and the top outlet of the fly ash silo (5) are communicated with the inlet of the exhaust filter (6), and the bottom outlet of the exhaust filter (6) is communicated with the inlet of the fly ash silo (5).

2. The dry pulverized coal gasification ash removal device with a common exhaust filter according to claim 1, further comprising a high-pressure nitrogen pipeline, wherein the high-pressure nitrogen pipeline is communicated with the blowback gas inlet of the fly ash lock hopper (3).

3. The dry pulverized coal gasification ash removal device with a common exhaust filter according to claim 1, further comprising a low-pressure nitrogen pipeline, wherein the low-pressure nitrogen pipeline is communicated with a blowback gas inlet of the fly ash stripping tank (4).

4. The dry pulverized coal gasification ash removal device with a common exhaust filter according to claim 1, further comprising a blowback nitrogen gas pipe, wherein the blowback nitrogen gas pipe is communicated with the blowback gas inlet of the exhaust filter (6).

5. The dry pulverized coal gasification ash removal device with a common exhaust filter according to claim 1, wherein a back-blowing nitrogen buffer tank (7) is provided on the back-blowing nitrogen pipeline.

6. The dry pulverized coal gasification dust removing apparatus with a common exhaust filter according to claim 1, wherein the side of the fly ash storage tank (2) communicates with the side of the fly ash lock hopper (3).

7. The dry coal gasification ash removal device with a common exhaust filter according to claim 1, wherein the high pressure nitrogen gas pipeline is provided with a first valve.

8. The dry coal gasification ash removal device with a common exhaust filter according to claim 7, wherein a second valve is provided on the low pressure nitrogen gas pipe.

9. The dry coal gasification ash removal device with a common exhaust filter according to claim 8, wherein a third valve is arranged on the back-flushing nitrogen pipeline.

10. The dry coal gasification ash removal device with common exhaust gas filter according to claim 9, characterized in that the bottom outlet of the fly ash silo (5) is provided with a fourth valve.

Technical Field

The invention belongs to the field of coal gasification, relates to a dry coal powder gasification ash removal device, and particularly relates to a dry coal powder gasification ash removal device sharing an exhaust filter.

Background

Coal gasification is an important technology and a main means for realizing the comprehensive utilization of coal and a clean coal technology, and is a tap for developing the industrial production of modern coal chemical industry, coal-to-liquid, fuel gas and the like. The dry ash removal system is an important unit of coal gasification and is characterized by high ash removal efficiency, no sewage discharge, environmental protection and high efficiency. After the fly ash generated by coal gasification is discharged from the gasification furnace and the waste boiler along with the synthesis gas, dry-method ash removal is firstly carried out through a fly ash filter, most of the fly ash in the synthesis gas is removed through the filter, and then the fly ash enters a wet-method washing unit for further fine dust removal.

The fly ash filtered by the fly ash filter enters a fly ash storage tank for storage, is communicated with a fly ash lock hopper after reaching a certain material level, is discharged into the fly ash lock hopper, is isolated from upper and lower equipment for pressure relief, is communicated with the fly ash lock hopper and a fly ash gas stripping tank for ash discharge when the pressure is equal to the pressure of the fly ash gas stripping tank at the lower part, and is discharged into a fly ash silo after being stripped by low-pressure nitrogen for multiple times in the gas stripping tank. In the whole ash discharging process, pressure is required to be charged and pressure is required to be discharged, air is required to be extracted, and in the traditional process, each exhaust device is provided with an exhaust filter corresponding to the exhaust device and a nitrogen back-blowing system matched with the exhaust filter, so that the dry ash removing system has more devices, high investment and more complicated process; and the consumption of back-blowing nitrogen is high, which affects the components of the synthesis gas.

Therefore, in order to avoid the drawbacks of the multi-stage exhaust filtration and blowback system, it is necessary to design an ash removal system with high dust removal efficiency, good dust removal effect and high flexibility to solve the above problems.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a dry coal powder gasification ash removal device sharing an exhaust filter, which has a simple structure and low consumption of back-flushing gas.

The invention relates to a dry coal powder gasification ash removal device sharing an exhaust filter, which comprises an ash-containing synthetic gas pipeline, a fly ash filter, a clean synthetic gas pipeline, a fly ash storage tank, a fly ash lock hopper, a fly ash gas stripping tank, a fly ash silo and the exhaust filter;

the outlet of the ash-containing synthetic gas pipeline is communicated with the inlet of a fly ash filter, the outlet of the top of the fly ash filter is communicated with a clean synthetic gas pipeline, the outlet of the bottom of the fly ash filter is communicated with the inlet of a fly ash storage tank, the outlet of the bottom of the fly ash storage tank is communicated with the inlet of a fly ash lock hopper, the outlet of the bottom of the fly ash lock hopper is communicated with the inlet of a fly ash gas stripping tank, the outlet of the bottom of the fly ash gas stripping tank is communicated with the inlet of a fly ash silo, and the outlet of the bottom of the fly ash silo;

the top outlet of the fly ash lock bucket, the top outlet of the fly ash gas stripping tank and the top outlet of the fly ash silo are communicated with the inlet of an exhaust filter, and the bottom outlet of the exhaust filter is communicated with the inlet at the lower part of the fly ash silo.

The device also comprises a high-pressure nitrogen pipeline, wherein the high-pressure nitrogen pipeline is communicated with the stamping inlet of the fly ash lock hopper.

The device also comprises a low-pressure nitrogen pipeline, wherein the low-pressure nitrogen pipeline is communicated with a stamping inlet of the fly ash stripping tank.

The device also comprises a back-blowing nitrogen pipeline, wherein the back-blowing nitrogen pipeline is communicated with a back-blowing gas inlet of the exhaust filter.

The side surface of the fly ash storage tank is communicated with the side surface of the fly ash lock hopper.

And a back-blowing nitrogen buffer tank is arranged on the back-blowing nitrogen pipeline.

The high-pressure nitrogen pipeline is provided with a first valve.

And a second valve is arranged on the low-pressure nitrogen pipeline.

And a third valve is arranged on the back flushing nitrogen pipeline.

And a fourth valve is arranged at the bottom outlet of the fly ash silo.

The invention has the following beneficial effects:

when the dry coal powder gasification ash removal device sharing the exhaust filter is in specific operation, one exhaust filter is shared, so that each stage of exhaust filtering system is omitted, the exhaust of the fly ash lock hopper, the fly ash gas stripping tank and the fly ash silo is completely introduced into the exhaust filter for filtering and back flushing, the structure is simple, the equipment investment is saved, the frame height is reduced, and the consumption of back flushing nitrogen is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Wherein, 1 is a fly ash filter, 2 is a fly ash storage tank, 3 is a fly ash lock hopper, 4 is a fly ash gas stripping tank, 5 is a fly ash silo, 6 is an exhaust filter, and 7 is a back-blowing nitrogen buffer tank.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

referring to fig. 1, the dry coal gasification ash removal device with a common exhaust filter according to the present invention includes an ash-containing synthesis gas pipeline, a fly ash filter 1, a clean synthesis gas pipeline, a fly ash storage tank 2, a fly ash lock hopper 3, a fly ash stripping tank 4, and a fly ash silo 5; the outlet of the ash-containing synthetic gas pipeline is communicated with the inlet of a fly ash filter 1, the outlet at the top of the fly ash filter 1 is communicated with a clean synthetic gas pipeline, the outlet at the bottom of the fly ash filter 1 is communicated with the inlet of a fly ash storage tank 2, the outlet at the bottom of the fly ash storage tank 2 is communicated with the inlet of a fly ash lock bucket 3, the outlet at the bottom of the fly ash lock bucket 3 is communicated with the inlet of a fly ash gas stripping tank 4, the outlet at the bottom of the fly ash gas stripping tank 4 is communicated with the inlet of a fly ash silo 5, and the outlet at the bottom of the fly ash silo 5; the top outlet of the fly ash lock bucket 3, the top outlet of the fly ash gas stripping tank 4 and the top outlet of the fly ash silo 5 are communicated with the inlet of an exhaust filter 6, and the bottom outlet of the exhaust filter 6 is communicated with the inlet of the fly ash silo 5.

The invention also comprises a high-pressure nitrogen pipeline, wherein the high-pressure nitrogen pipeline is communicated with the back-blowing gas inlet of the fly ash lock hopper 3.

The invention also comprises a low-pressure nitrogen pipeline, wherein the low-pressure nitrogen pipeline is communicated with a back-blowing gas inlet of the fly ash gas stripping tank 4.

The invention also comprises a back-blowing nitrogen pipeline, wherein the back-blowing nitrogen pipeline is communicated with a back-blowing gas inlet of the exhaust filter 6, and a back-blowing nitrogen buffer tank 7 is arranged on the back-blowing nitrogen pipeline.

The side surface of the fly ash storage tank 2 is communicated with the side surface of the fly ash lock hopper 3.

A first valve is arranged on the high-pressure nitrogen pipeline; a second valve is arranged on the low-pressure nitrogen pipeline; a third valve is arranged on the back-blowing nitrogen pipeline; the bottom outlet of the fly ash silo 5 is provided with a fourth valve.

The specific working process of the invention is as follows:

the ash-containing synthetic gas enters a fly ash filter 1 for dust removal treatment, wherein clean synthetic gas output by the fly ash filter 1 is discharged, fly ash particles output from the bottom of the fly ash filter 1 enter a fly ash storage tank 2, fly ash particles output from the bottom of the fly ash storage tank 2 enter a fly ash lock bucket 3, fly ash particles output from the bottom of the fly ash lock bucket 3 enter a fly ash gas stripping tank 4, and fly ash particles output from the bottom of the fly ash gas stripping tank 4 enter a fly ash silo 5;

the gas output from the top of the fly ash lock hopper 3, the gas output from the fly ash gas stripping tank 4 and the gas output from the fly ash silo 5 are refluxed, then enter the exhaust filter 6 for filtration and then are discharged, wherein the particles output from the exhaust filter 6 enter the fly ash silo 5.

After the operation is carried out for a period of time, high-pressure nitrogen is introduced into the fly ash lock hopper 3 to stamp the fly ash lock hopper 3; and introducing low-pressure nitrogen into the fly ash gas stripping tank 4 to punch the fly ash gas stripping tank 4, and introducing back-blowing nitrogen into the exhaust filter 6 to back-blow the exhaust filter 6.