CN216738230U

CN216738230U - Anti-blocking system for black water pipeline of gasification furnace

Info

Publication number: CN216738230U
Application number: CN202122978493.4U
Authority: CN
Inventors: 章秀娟; 张伟; 蒋磊
Original assignee: Anhui Liuguo Chemical Industry Co Ltd
Current assignee: Anhui Liuguo Chemical Industry Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-06-14
Anticipated expiration: 2031-11-26

Abstract

The utility model belongs to the technical field of coal slurry gasifier production, concretely relates to prevent stifled system for gasifier black water pipeline. The utility model comprises a main gasification furnace and a standby gasification furnace, wherein the drainage pipelines at the main gasification furnace and the standby gasification furnace are communicated to a black water main pipe through independent connecting short pipes, the black water main pipe is communicated to a flash evaporation system, and a cut-off valve is arranged between each drainage pipeline and the corresponding connecting short pipe; the method is characterized in that: this prevent stifled system still including the stifled pipeline of preventing of connecting high pressure water source, prevent stifled pipeline at least with the linking nozzle stub of backup gasifier department be linked together, and prevent stifled pipeline with the tie point that links up the nozzle stub is located the entrance point that links up the nozzle stub, prevents arranging the shunt switch valve that is used for opening and close this anti-block pipeline on the stifled pipeline. The utility model discloses can reliably ensure to link up the nozzle stub and be in unblocked state all the time to avoid the black ash gathering and the stifled pipe situation that leads to because of the gasifier is in the standby state.

Description

Anti-blocking system for black water pipeline of gasification furnace

Technical Field

The utility model belongs to the technical field of coal slurry gasifier production, concretely relates to prevent stifled system for gasifier black water pipeline.

Background

In order to realize continuous production of the device, a spare furnace is provided in the production of the coal water slurry gasification furnace because the process burner needs to be replaced, the refractory bricks and the chilling ring need to be checked and checked after the gasification furnace operates for one period. The medium of the black water pipeline of the gasification furnace is process water containing fine slag at 250 ℃ and 4.0MPa, the black water of a single gasification furnace is discharged to a black water main pipe, the black water is collected in the black water main pipe and then discharged to a flash evaporation system for flash evaporation, and then the black water is precipitated, clarified and deslagged to form grey water. Because a certain distance always exists between the stop valve of a single gasification furnace and the black water main pipe, the distance of the section is usually provided with a short connecting pipe; when the gasification furnace is in a standby state, water in the connection short pipe is not circulated, and black ash is easily accumulated to cause the blockage of the connection short pipe. After the standby furnace is put into use, the whole pipeline cannot normally drain because the connecting short pipe is blocked; even if the blockage in the short connecting pipe is forced to rush into the black water main pipe under the high water pressure of black water discharged from the gasification furnace, the blockage of the black water main pipe is caused in a chain manner. The existing treatment mode can only stop all gasification furnaces and dredge all pipelines, which obviously seriously influences the long-period safe and stable operation of the device and urgently needs to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming above-mentioned prior art not enough, providing a rational in infrastructure and use reliable convenient stifled system that prevents that is used for gasifier black water pipeline, it can be reliable ensure to link up the nozzle stub and be in unblocked state all the time to avoid the black ash gathering and the stifled pipe situation that leads to because of the gasifier is in the stand-by state.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an anti-blocking system for a black water pipeline of a gasification furnace comprises a main gasification furnace and a standby gasification furnace, wherein drainage pipelines at the main gasification furnace and the standby gasification furnace are communicated to a black water main pipe through independent connecting short pipes, the black water main pipe is communicated to a flash evaporation system, and a stop valve is arranged between each drainage pipeline and the corresponding connecting short pipe; the method is characterized in that: this prevent stifled system still including the stifled pipeline of preventing of connecting high pressure water source, prevent stifled pipeline at least with the linking nozzle stub of backup gasifier department be linked together, and prevent stifled pipeline with the tie point that links up the nozzle stub is located the entrance point that links up the nozzle stub, prevents arranging the shunt switch valve that is used for opening and close this anti-block pipeline on the stifled pipeline.

Preferably, the water at the high-pressure water source is grey water obtained after treatment by the flash evaporation system, and the grey water is input to the anti-blocking pipeline through the high-pressure water pump.

Preferably, the water pressure of the grey water in the anti-blocking pipeline is more than 7.0MPa, and the water volume of the grey water is less than or equal to 20m³/h。

Preferably, the anti-blocking pipeline comprises an anti-blocking main pipe, more than two anti-blocking branch pipes are branched from the anti-blocking main pipe, and each anti-blocking branch pipe is communicated to the corresponding junction short pipe of the main gasification furnace and the standby gasification furnace one by one correspondingly; each anti-blocking branch pipe is correspondingly provided with a group of branch switch valves.

The beneficial effects of the utility model reside in that:

1) through the scheme, the standby gasifier can be opened to prevent the blockage pipeline in the idle period, so that water always flows in the connection short pipe between the stop valve and the black water main pipe, and ash residues in the black water are prevented from accumulating in the connection short pipe and further blocking the pipeline. Therefore, the utility model discloses can reliably ensure to link up the nozzle stub and be in unblocked state all the time to avoid gathering because of the gasifier is in the black ash that the standby state leads to and the stifled pipe situation.

2) During actual operation, obviously, the gasification furnace is not divided for standby or is mainly used, so that: on one hand, the anti-blocking pipeline can adopt a main branch pipe design similar to a black water main pipe, namely, one main pipe is matched with a plurality of branch pipes, so that the sequential flushing effect of junction short pipes at all gasification furnaces is realized; when any gasifier is in a standby period, the connection short pipe of the gasifier can be subjected to anti-blocking operation. On the other hand, the flushing water can directly use the grey water treated in the subsequent steps of the flash evaporation system, so that the high convenience and the low cost of the water are ensured by circulating the water, and meanwhile, the cleanliness of the grey water is obviously higher than that of the black water, so that the flushing and anti-blocking effects can be effectively ensured, and multiple purposes are achieved.

Drawings

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

The utility model discloses each reference numeral is as follows with the actual corresponding relation of part name:

10-main gasification furnace 20-standby gasification furnace 30-junction short pipe

40-black water header 50-flash system

60-anti-blocking pipeline 61-high pressure water pump 62-anti-blocking main pipe 63-anti-blocking branch pipe

Detailed Description

For the sake of understanding, the specific structure and operation of the present invention will be further described with reference to fig. 1:

the utility model discloses a concrete structure is as shown in FIG. 1, also all increases one behind the trip valve of every main gasifier 10 and backup gasifier 20's drain line and prevents stifled minute 63, prevents arranging the shunt switch valve on preventing stifled minute 63, and all prevent stifled minute 63 and all be connected to and prevent stifled house steward 62 department. The input end of the anti-blocking main pipe 62 is connected with a high-pressure water source. The water at the high-pressure water source is grey water obtained after the treatment of the flash evaporation system 50, and the grey water is input to the anti-blocking pipeline 60 through the high-pressure water pump 61.

Taking the specific implementation structure shown in fig. 1 as an example: assuming that the backup gasifier C in fig. 1 is a backup gasifier, the shutoff valves V are provided in the main gasifier a and the main gasifier B_AAnd V_BAre all in an open state, and a stop valve V is arranged at the position C of the standby gasification furnace_CIn the off state. At this time, the shunt switch valve V should be opened and closed_a1And V_b1Closing, V_c1Is opened to thereby cut off the valve V_CThe entire junction stub 30 to the black water main 40 is continuously flushed to prevent ash in the black water from accumulating in the corresponding piping at the backup gasifier C.

During flushing, the water pressure of the grey water in the anti-blocking pipeline 60 is greater than 7.0MPa, so that the flushing effect is ensured. And in the anti-blocking pipeline 60The amount of grey water should be less than or equal to 20m³And h, otherwise, the flash evaporation effect of the black water is influenced.

Of course, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the same or similar structures may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

The technology not described in detail in the present invention is known technology.

Claims

1. An anti-blocking system for a gasifier black water pipeline comprises a main gasifier (10) and a standby gasifier (20), wherein water drainage pipelines at the main gasifier (10) and the standby gasifier (20) are communicated to a black water main pipe (40) through independent connecting short pipes (30), the black water main pipe (40) is communicated to a flash evaporation system (50), and a stop valve is arranged between each water drainage pipeline and the corresponding connecting short pipe (30); the method is characterized in that: the anti-blocking system further comprises an anti-blocking pipeline (60) connected with a high-pressure water source, the anti-blocking pipeline (60) is at least communicated with the connection short pipe (30) at the position of the standby gasification furnace (20), the anti-blocking pipeline (60) and the connection point of the connection short pipe (30) are located at the inlet end of the connection short pipe (30), and a shunt switch valve used for opening and closing the anti-blocking pipeline (60) is arranged on the anti-blocking pipeline (60).

2. The anti-blocking system for the black water pipeline of the gasification furnace according to claim 1, wherein: the water at the high-pressure water source is grey water obtained after treatment of the flash evaporation system (50), and the grey water is input to the anti-blocking pipeline (60) through a high-pressure water pump (61).

3. The anti-blocking system for the black water pipeline of the gasification furnace according to claim 2, wherein: the water pressure of the grey water in the anti-blocking pipeline (60) is more than 7.0MPa, and the water quantity of the grey water is less than or equal to 20m³/h。

4. The anti-blocking system for the black water line of the gasification furnace according to claim 1, 2 or 3, wherein: the anti-blocking pipeline (60) comprises an anti-blocking main pipe (62), more than two anti-blocking branch pipes (63) are branched from the anti-blocking main pipe (62), and each anti-blocking branch pipe (63) is respectively communicated to the corresponding connecting short pipes (30) of the main gasification furnace (10) and the standby gasification furnace (20) one by one correspondingly; each anti-blocking branch pipe (63) is correspondingly provided with a group of branch switching valves.