阅读说明：本技术 一种带两级过滤器的干煤粉气化除灰系统 (Dry pulverized coal gasification ash removal system with two-stage 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：本发明公开了一种带两级过滤器的干煤粉气化除灰系统,含尘合成气管道的出口分为两路,其中一路与旋风除尘器的入口相连通,另一路与陶瓷过滤器的入口相连通,旋风除尘器的顶部出口与陶瓷过滤器的入口相连通,旋风除尘器的底部出口及陶瓷过滤器的底部出口与飞灰锁斗的入口相连通,飞灰锁斗的顶部出口与锁斗排气过滤器的入口相连通,锁斗排气过滤器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,飞灰气提罐的顶部出口与气提排气过滤器的入口相连通,气提排气过滤器的底部出口与飞灰气提罐的入口相连通,该系统可根据工况灵活的进行单级和两级过滤器的切换,具有除尘效率高、除尘效果好及灵活性较高的特点。(The invention discloses a dry coal powder gasification dust-removing system with a two-stage filter, wherein the outlet of a dust-containing synthesis gas pipeline is divided into two paths, one path is communicated with the inlet of a cyclone dust collector, the other path is communicated with the inlet of a ceramic filter, the outlet at the top of the cyclone dust collector is communicated with the inlet of the ceramic filter, the outlet at the bottom of the cyclone dust collector and the outlet at the bottom of the ceramic filter are communicated with the inlet of a fly ash lock bucket, the outlet at the top of the fly ash lock bucket is communicated with the inlet of a lock bucket exhaust filter, the outlet at the bottom of the lock bucket exhaust filter is communicated with the inlet of the fly ash lock bucket, the outlet at the bottom of the fly ash lock bucket is communicated with the inlet of a fly ash gas stripping tank, the outlet at the top of the fly ash gas stripping tank is communicated with the inlet of the fly ash gas stripping exhaust filter, the outlet at the bottom of the gas, the dust removal device has the characteristics of high dust removal efficiency, good dust removal effect and higher flexibility.)

1. A dry coal powder gasification dust removal system with two-stage filters is characterized by comprising a dust-containing synthetic gas pipeline, a cyclone dust collector (1), a ceramic filter (2), a fly ash lock hopper (3), a lock hopper exhaust filter (6), a fly ash gas stripping tank (4), a gas stripping exhaust filter (8), a fly ash storage tank (5) and a storage tank exhaust filter (10);

the outlet of the dust-containing synthetic gas pipeline is divided into two paths, wherein one path is communicated with the inlet of the cyclone dust collector (1), the other path is communicated with the inlet of the ceramic filter (2), the outlet at the top of the cyclone dust collector (1) is communicated with the inlet of the ceramic filter (2), the outlet at the bottom of the cyclone dust collector (1) and the outlet at the bottom of the ceramic filter (2) are communicated with the inlet of the fly ash lock bucket (3), the outlet at the top of the fly ash lock bucket (3) is communicated with the inlet of the lock bucket exhaust filter (6), the outlet at the bottom of the lock bucket exhaust filter (6) is communicated with the inlet of the fly ash lock bucket (3), the outlet at the bottom of the fly ash lock bucket (3) is communicated with the inlet of the fly ash stripping tank (4), the outlet at the top of the fly ash stripping tank (4) is communicated with the inlet of the gas stripping exhaust filter (8), the outlet at the bottom of the gas stripping exhaust filter (, the bottom outlet of the fly ash gas stripping tank (4) is communicated with the inlet of the fly ash storage tank (5).

2. The dry pulverized coal gasification ash removal system with a two-stage filter according to claim 1, further comprising a ceramic back-blowing nitrogen buffer tank (13) and a first hot high-pressure nitrogen pipeline, wherein the first hot high-pressure nitrogen pipeline is communicated with the back-blowing inlet of the ceramic filter (2) through the ceramic back-blowing nitrogen buffer tank (13).

3. The dry pulverized coal gasification and deashing system with a two-stage filter according to claim 2, further comprising a lock hopper back-blown nitrogen buffer tank (7) and a second hot high-pressure nitrogen pipeline, wherein the second hot high-pressure nitrogen pipeline is communicated with the back-blown inlet of the lock hopper exhaust filter (6) through the lock hopper back-blown nitrogen buffer tank (7).

4. The dry pulverized coal gasification ash removal system with a two-stage filter according to claim 1, further comprising a hot low-pressure nitrogen pipeline and a stripping back-blowing nitrogen buffer tank (9), wherein the hot low-pressure nitrogen pipeline is communicated with a back-blowing inlet of the stripping exhaust filter (8) through the stripping back-blowing nitrogen buffer tank (9).

5. The dry pulverized coal gasification ash removal system with a two-stage filter according to claim 1, further comprising a low-pressure nitrogen pipeline and a storage tank back-blowing nitrogen buffer tank (11), wherein the low-pressure nitrogen pipeline is communicated with a back-blowing inlet of the storage tank exhaust filter (10) through the storage tank back-blowing nitrogen buffer tank (11).

6. The dry pulverized coal gasification deashing system with a two-stage filter according to claim 1, further comprising a fly ash output duct, wherein the fly ash output duct is in communication with an outlet of the fly ash storage tank (5).

7. The dry pulverized coal gasification and deashing system with a two-stage filter according to claim 1, further comprising a fly ash circulation pipe, a fly ash sender (12) and a low pressure nitrogen pipe, wherein an inlet of the fly ash sender (12) is communicated with the low pressure nitrogen pipe and the fly ash output pipe, and an outlet of the fly ash sender (12) is communicated with the fly ash circulation pipe.

8. The dry coal dust gasification and ash removal system with a two-stage filter according to claim 1, characterized in that a first valve is provided at the inlet of the cyclone (1).

9. The dry pulverized coal gasification ash removal system with a two-stage filter according to claim 1, characterized in that the outlet of the dusty syngas conduit is divided into two paths, wherein one path is communicated with the inlet of the cyclone (1) through a first valve, and the other path is communicated with the inlet of the ceramic filter (2) through a second valve;

the outlet at the bottom of the fly ash lock hopper (3) is communicated with the inlet of the fly ash gas stripping tank (4) through a third valve;

the bottom outlet of the fly ash gas stripping tank (4) is communicated with the inlet of the storage tank (5) through a fourth valve.

10. The dry pulverized coal gasification ash removal system with a two-stage filter according to claim 1, further comprising a clean syngas conduit, a discharge gas conduit and a stripping gas conduit, wherein the clean syngas conduit is in communication with the top outlet of the ceramic filter (2); the exhaust gas pipeline is communicated with the top outlet of the lock bucket exhaust filter (6) and the top outlet of the storage tank exhaust filter (10), and the gas stripping gas pipeline is communicated with the top outlet of the gas stripping exhaust filter (8).

Technical Field

The invention belongs to the field of coal gasification, relates to a dry coal powder gasification ash removal system, and particularly relates to a dry coal powder gasification ash removal system with a two-stage filter.

Background

Coal gasification is an important process technology in the field of IGCC power generation and coal chemical industry, and in the coal gasification technology, the synthesis gas generated by a coal gasification furnace cannot be directly used for gas turbine power generation or chemical synthesis due to large ash content, and the synthesis gas containing ash is usually required to be subjected to ash removal treatment and then used. However, in the prior art, bag-type dust collectors are mostly adopted in the dust removing process, but the dust removing effect is poor, and the bag-type filter element is burnt out in a high-temperature and high-pressure environment. Typical equipment in the dry ash removal technology is a high-temperature high-pressure filter, a plurality of groups of metal or ceramic filter elements are used for removing ash, but when large-air-quantity dust-containing synthesis gas is treated, the ash removal effect is poor, a plurality of filter series are required to be arranged for removing ash in parallel, and the problem of equipment investment and increase of occupied area is caused. Moreover, when the dust content of the synthesis gas is low, the synthesis gas deviates from the optimal design load, which causes energy consumption waste and poor flexibility, thereby seriously influencing the popularization and application of the coal gasification technology.

Therefore, it is necessary to design an ash removing system with high dust removing efficiency, good dust removing 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 system with a two-stage filter, which has the characteristics of high dust removal efficiency, good dust removal effect and higher flexibility.

In order to achieve the aim, the dry coal powder gasification dust removal system with the two-stage filter comprises a dust-containing synthesis gas pipeline, a cyclone dust collector, a ceramic filter, a fly ash lock bucket, a lock bucket exhaust filter, a fly ash gas stripping tank, a gas stripping exhaust filter and a fly ash storage tank;

the outlet of the dust-containing synthetic gas pipeline is divided into two paths, wherein one path is communicated with the inlet of the cyclone dust collector, the other path is communicated with the inlet of the ceramic filter, the outlet at the top of the cyclone dust collector is communicated with the inlet of the ceramic filter, the outlet at the bottom of the cyclone dust collector and the outlet at the bottom of the ceramic filter are communicated with the inlet of the fly ash lock bucket, the outlet at the top of the fly ash lock bucket is communicated with the inlet of the lock bucket exhaust filter, the outlet at the bottom of the lock bucket exhaust filter is communicated with the inlet at the lower part of the fly ash lock bucket, the outlet at the bottom of the fly ash lock bucket is communicated with the inlet of the fly ash gas stripping tank, the outlet at the top of the fly ash gas stripping tank is communicated with the inlet at the lower part of the gas stripping fly ash exhaust filter.

The ceramic back-blowing nitrogen filter is characterized by further comprising a ceramic back-blowing nitrogen buffer tank and a first hot high-pressure nitrogen pipeline, wherein the first hot high-pressure nitrogen pipeline is communicated with a back-blowing inlet of the ceramic filter through the ceramic back-blowing nitrogen buffer tank.

The lock hopper back-blowing type nitrogen filter is characterized by further comprising a lock hopper back-blowing nitrogen buffer tank and a second hot high-pressure nitrogen pipeline, wherein the second hot high-pressure nitrogen pipeline is communicated with a back-blowing inlet of the lock hopper exhaust filter through the lock hopper back-blowing nitrogen buffer tank.

The device also comprises a hot low-pressure nitrogen pipeline and a gas stripping back-blowing nitrogen buffer tank, wherein the hot low-pressure nitrogen pipeline is communicated with a back-blowing inlet of the gas stripping exhaust filter through the gas stripping back-blowing nitrogen buffer tank.

The device also comprises a low-pressure nitrogen pipeline and a storage tank back-blowing nitrogen buffer tank, wherein the low-pressure nitrogen pipeline is communicated with a back-blowing inlet of the storage tank exhaust filter through the storage tank back-blowing nitrogen buffer tank.

The device also comprises a fly ash output pipeline, wherein the fly ash output pipeline is communicated with an outlet of the fly ash storage tank.

The device also comprises a fly ash circulating pipeline, a fly ash transmitter and a low-pressure nitrogen pipe, wherein the inlet of the fly ash transmitter is communicated with the low-pressure nitrogen pipe and the fly ash output pipeline, and the outlet of the fly ash transmitter is communicated with the fly ash circulating pipeline.

The outlet of the dust-containing synthetic gas pipeline is divided into two paths, wherein one path is communicated with the inlet of the cyclone dust collector through a first valve, and the other path is communicated with the inlet of the ceramic filter through a second valve.

The outlet at the bottom of the fly ash lock bucket is communicated with the inlet of the fly ash gas stripping tank through a third valve.

The outlet at the bottom of the fly ash gas stripping tank is communicated with the inlet of the storage tank through a fourth valve.

The device also comprises a clean synthetic gas pipeline, an exhaust gas pipeline and a gas stripping gas pipeline, wherein the clean synthetic gas pipeline is communicated with the top outlet of the ceramic filter; the exhaust gas pipeline is communicated with the top outlet of the lock hopper exhaust filter and the top outlet of the storage tank exhaust filter, and the gas stripping gas pipeline is communicated with the top outlet of the gas stripping exhaust filter.

The invention has the following beneficial effects:

when the dry coal powder gasification ash removal system with the two-stage filter is in specific operation, two-stage ash removal of the synthesis gas is realized by arranging the cyclone dust collector and the ceramic filter, wherein gas output after the first-stage ash removal through the cyclone separator enters the ceramic filter for second-stage ash removal so as to improve the ash removal effect of the synthesis gas, and meanwhile, when the ash content of the synthesis gas is not high, the synthesis gas containing ash can be directly introduced into the ceramic filter for treatment, so that the flexibility is higher. In addition, the fly ash output from the bottom of the cyclone dust collector and the bottom of the ceramic filter enter the fly ash lock hopper, so that the cyclone dust collector and the ceramic filter share one set of lock hopper, air stripping and storage tank, and the cost is saved.

Drawings

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

Wherein, 1 is a cyclone dust collector, 2 is a ceramic filter, 3 is a fly ash lock bucket, 4 is a fly ash gas stripping tank, 5 is a fly ash storage tank, 6 is a lock bucket exhaust filter, 7 is a lock bucket back-blowing nitrogen buffer tank, 8 is a gas stripping exhaust filter, 9 is a gas stripping back-blowing nitrogen buffer tank, 10 is a storage tank exhaust filter, 11 is a storage tank back-blowing nitrogen buffer tank, 12 is a fly ash sender, and 13 is a ceramic back-blowing nitrogen buffer tank.

Detailed Description

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

the present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.

Referring to fig. 1, the dry pulverized coal gasification dust removal system with two-stage filter according to the present invention comprises a dust-containing synthesis gas pipeline, a cyclone dust collector 1, a ceramic filter 2, a fly ash lock hopper 3, a lock hopper exhaust filter 6, a fly ash stripping tank 4, a stripping exhaust filter 8, a fly ash storage tank 5 and a storage tank exhaust filter 10; the outlet of the dust-containing synthetic gas pipeline is divided into two paths, wherein one path is communicated with the inlet of the cyclone dust collector 1, the other path is communicated with the inlet of the ceramic filter 2, the outlet at the top of the cyclone dust collector 1 is communicated with the inlet of the ceramic filter 2, the outlet at the bottom of the cyclone dust collector 1 and the outlet at the bottom of the ceramic filter 2 are communicated with the inlet of the fly ash lock bucket 3, the outlet at the top of the fly ash lock bucket 3 is communicated with the inlet of the lock bucket exhaust filter 6, the outlet at the bottom of the lock bucket exhaust filter 6 is communicated with the inlet of the fly ash lock bucket 3, the outlet at the bottom of the fly ash lock bucket 3 is communicated with the inlet of the fly ash gas stripping tank 4, the outlet at the top of the fly ash gas stripping tank 4 is communicated with the inlet of the gas stripping exhaust filter 8, the outlet at the bottom of the gas stripping filter 8 is communicated.

The invention also comprises a ceramic back-blowing nitrogen buffer tank 13 and a first hot high-pressure nitrogen pipeline, wherein the first hot high-pressure nitrogen pipeline is communicated with the back-blowing inlet of the ceramic filter 2 through the ceramic back-blowing nitrogen buffer tank 13.

The invention also comprises a lock hopper back-blowing nitrogen buffer tank 7 and a second hot high-pressure nitrogen pipeline, wherein the second hot high-pressure nitrogen pipeline is communicated with a back-blowing inlet of the lock hopper exhaust filter 6 through the lock hopper back-blowing nitrogen buffer tank 7.

The invention also comprises a hot low-pressure nitrogen pipeline and a gas stripping back-blowing nitrogen buffer tank 9, wherein the hot low-pressure nitrogen pipeline is communicated with a back-blowing inlet of the gas stripping exhaust filter 8 through the gas stripping back-blowing nitrogen buffer tank 9.

The invention also comprises a low-pressure nitrogen pipeline and a storage tank back-blowing nitrogen buffer tank 11, wherein the low-pressure nitrogen pipeline is communicated with a back-blowing inlet of the storage tank exhaust filter 10 through the storage tank back-blowing nitrogen buffer tank 11.

The invention also comprises a fly ash output pipeline, wherein the fly ash output pipeline is communicated with the outlet of the fly ash storage tank 5.

The device also comprises a fly ash circulating pipeline, a fly ash transmitter 12 and a low-pressure nitrogen pipe, wherein the inlet of the fly ash transmitter 12 is communicated with the low-pressure nitrogen pipe and the fly ash output pipeline, and the outlet of the fly ash transmitter 12 is communicated with the fly ash circulating pipeline.

The inlet of the cyclone 1 is provided with a first valve.

The outlet of the dust-containing synthesis gas pipeline is divided into two paths, wherein one path is communicated with the inlet of the cyclone dust collector 1 through a first valve, and the other path is communicated with the inlet of the ceramic filter 2 through a second valve.

The outlet at the bottom of the fly ash lock bucket 3 is communicated with the inlet of the fly ash gas stripping tank 4 through a third valve.

The outlet at the bottom of the fly ash gas stripping tank 4 is communicated with the inlet of the storage tank 5 through a fourth valve.

The invention also comprises a clean synthesis gas pipeline, an exhaust gas pipeline and a gas stripping gas pipeline, wherein the clean synthesis gas pipeline is communicated with the top outlet of the ceramic filter 2; the exhaust gas pipeline is communicated with the top outlet of the lock hopper exhaust filter 6 and the top outlet of the storage tank exhaust filter 10, and the gas exhaust pipeline is communicated with the top outlet of the gas exhaust filter 8.

The dust-containing synthetic gas output by the dust-containing synthetic gas pipeline is divided into two paths, wherein one path enters a cyclone dust collector 1 for separation, the other path enters a ceramic filter 2 for separation, the synthetic gas output by the cyclone dust collector enters the ceramic filter 2, the clean synthetic gas output by the ceramic separator is discharged through a clean synthetic gas pipeline, the fly ash output by the bottom of the ceramic separator and the fly ash output by the bottom of the cyclone dust collector are counted in a fly ash lock bucket 3, the fly ash output by the fly ash lock bucket 3 enters a fly ash gas stripping tank 4 for treatment, and the fly ash particles output by the bottom of the fly ash gas stripping tank 4 enter a fly ash storage tank 5 for storage;

gas output from the top of the fly ash lock hopper 3 enters the lock hopper exhaust filter 6 for filtering, the filtered gas is exhausted, and fly ash particles obtained by filtering enter the fly ash lock hopper 3;

the gas output by the fly ash gas stripping tank 4 enters a gas stripping exhaust filter 8 for filtering, wherein the filtered gas is discharged, and fly ash particles obtained by filtering enter the fly ash gas stripping tank 4;

the exhaust gas from the fly ash storage tank 5 enters the storage tank exhaust filter 10 for filtration, wherein the filtered gas is discharged, and the fly ash particles obtained by filtration enter the fly ash storage tank 5.

After the operation is carried out for a period of time, the lock hopper exhaust filter 6, the gas stripping exhaust filter 8 and the storage tank exhaust filter 10 need to be subjected to back flushing, wherein the lock hopper exhaust filter 6 is subjected to back flushing through hot high-pressure stripping; back flushing the gas-stripping exhaust filter 8 by hot and low-pressure nitrogen; the storage tank exhaust filter 10 is back-blown by low-pressure nitrogen.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.