CN216778110U

CN216778110U - Coal gasification black water filtration system

Info

Publication number: CN216778110U
Application number: CN202220137646.4U
Authority: CN
Inventors: 王再雄
Original assignee: Nanjing Xiong Kai Filter Equipment Co ltd
Current assignee: Nanjing Xiong Kai Filter Equipment Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-06-21
Anticipated expiration: 2032-01-19

Abstract

The utility model discloses a coal gasification black water filtering system which comprises a filter, a thin pipe and a thick pipe, wherein the middle position of the top of the filter is fixedly connected with a device top, the left side of the top of the device top is penetrated through by the thin pipe and is fixedly connected with a compressed nitrogen port, and the right side of the top of the device top is penetrated through by the thick pipe and is fixedly connected with an exhaust port. In the utility model, after the filter operates for a long time, substances with higher surface viscosity of the filter element cannot be regenerated and cleaned by compressed air. After the filter is backflushed, the valve ports on the two sides of the pickling tank are opened, the filter element is subjected to circulating pickling, after a certain time, the valve ports on the two sides of the pickling tank are closed, the exhaust valve is opened to exhaust harmful gas, the valve on one side of the liquid drainage bin is opened, acid liquid in the filter is compressed to enter the liquid drainage bin, and then the valve on one side of the desalting port is opened to perform desalted water cleaning on the pickled filter element, so that the self-cleaning performance of the filter is improved, and the subsequent cleaning of the filter is reduced.

Description

Coal gasification black water filtration system

Technical Field

The utility model relates to the field of filter equipment, in particular to a coal gasification black water filter system.

Background

When the coal gasification system adopts a synthetic gas chilling process, a large amount of solid-containing waste water, namely gasification black water, is necessarily generated. In the prior art, gasification black water is mainly treated by multi-stage flash evaporation and flocculation sedimentation, usually, the gasification black water is subjected to multi-stage flash evaporation to remove acid gas dissolved in wastewater, and meanwhile, grey water and flash evaporation gas are used for heat exchange to recover waste heat in the flash evaporation process of black water.

The existing coal gasification black water filtering system still has many problems, for example, the black water filter equipment is mainly a basket filter, a basket type filter and other filters, the filtering precision is not high, the cleaning after filtering is also very troublesome, and residual filtering impurities are easy to remain.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a coal gasification black water filtering system.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a coal gasification black water filtration system, includes the filter, filter top intermediate position fixedly connected with ware top, ware top left side is run through and fixedly connected with compressed nitrogen gas port, ware top right side is run through and the first exhaust port of fixedly connected with, ware top right side top is run through and fixedly connected with filtrate mouth, through pipeline fixedly connected with pickling tank between ware top bottom and the filter right side bottom, filter left side bottom is run through and fixedly connected with black mouth of a river.

As a further description of the above technical solution:

and a filter element is fixedly connected to the middle position of the top of the inner wall of the filter.

As a further description of the above technical solution:

the top of the pickling tank is penetrated and fixedly connected with an exhaust port.

As a further description of the above technical solution:

the bottom of the pickling tank is penetrated and fixedly connected with a liquid outlet.

As a further description of the above technical solution:

the middle position of the right side of the top of the desalting device penetrates through and is fixedly connected with a desalting port.

As a further description of the above technical solution:

the bottom of the filter penetrates through and is fixedly connected with a dirt discharge port.

As a further description of the above technical solution:

and the outer wall of the pipeline is provided with an acid washing pump.

The utility model has the following beneficial effects:

1. in the utility model, firstly, black water enters a filter through a black water port, when filtrate in a filtrate port enters an initial filter in a device top from the tops of two sides of the device top under the action of system pressure, because no filter cake exists on the surface of a filter element when the filter element is fed into the initial filter in the device top, the feed flow can be adjusted to be small, the filter element is prevented from being impacted by too high flow speed, liquid passes through micropores of the filter element, solid particles are intercepted by the filter element, a filter cake is formed on the outer surface of the filter element, the filtrate flows into the filter, the filtrate flows out from an outlet of the filter and then enters a downstream working section to complete the filtration, in the whole filtration process, the pressure difference between the front part and the rear part of the filter is strictly controlled, the filter cake is thicker and thicker along with the increase of the filtration time, if the pressure cannot be controlled during the pressure relief, a compressed nitrogen gas port is opened until the pressure is increased to 0.5MPa, a dirt discharge port is opened, and after the normal filtration is carried out for a period, the cake layer exceeds a certain thickness, the velocity of the filtrate passing through the cake layer is reduced, the filtering efficiency is poor, when the set filtering time or pressure difference is reached, the filter is backwashed, the pressure of the filter is relieved to 0.5MPa by opening the first exhaust port, the dirty discharge port is opened, after the filter cake layer is normally filtered for a period of time, the filter cake layer exceeds a certain thickness, the speed of filtrate passing through the filter cake layer is reduced, the filtering efficiency is poor, when the set filtering time or pressure difference is reached, the filter is backwashed, and the backwashing is added in the filtering process, so that the filtering function of the filter is greatly improved.

2. In the utility model, substances with higher surface viscosity of the filter element cannot be regenerated and cleaned by compressed air. After the filter is backflushed, the pickling pump is started to enable the pickling tank to carry out circulating pickling on the filter element, after a certain time, the pickling pump is closed, the second exhaust port is opened to discharge harmful gas, the liquid discharge port is opened, and acid liquid in the compressed filter enters the liquid discharge port. Desalted water enters the filter through the desalting port to clean the filter element after acid washing, and the filter is connected with the acid washing tank through the pipeline, so that the self-cleaning performance of the filter is improved, and the follow-up cleaning of the filter is reduced.

Drawings

FIG. 1 is a front view of a coal gasification black water filtration system according to the present invention;

FIG. 2 is an internal structural view of a filter of a coal gasification black water filtration system according to the present invention;

illustration of the drawings:

1. a first exhaust port; 2. a compressed nitrogen port; 3. jacking the device; 4. a desalting port; 5. a black water port; 6. a filter; 7. a filtrate port; 8. a second exhaust port; 9. a pickling tank; 10. a filter element; 11. a liquid discharge port; 12. a dirty discharge port; 13. a pickling pump; 14. a pipeline.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2, one embodiment of the present invention is provided: a coal gasification black water filtering system comprises a filter 6, a top middle position of the filter 6 is fixedly connected with a top 3, the left side of the top 3 is penetrated and fixedly connected with a compressed nitrogen port 2, the right side of the top 3 is penetrated and fixedly connected with a first exhaust port 1, the top of the right side of the top 3 is penetrated and fixedly connected with a filtrate port 7, a pickling tank 9 is fixedly connected between the bottom of the top 3 and the bottom of the right side of the filter 6 through a pipeline 14, the bottom of the left side of the filter 6 is penetrated and fixedly connected with a black water port 5, black water enters the filter 6 through the black water port 5, when filtrate in the filtrate port 7 is under the action of system pressure, filter cake does not exist on the surface of a filter element 10 when entering the initial filter 6 in the top 3 from the tops of the two sides of the top 3, the feeding flow rate can be adjusted to be small, the filter element 10 is prevented from impacting too fast, liquid passes through micropores of the filter element 10, solid particles are intercepted by the filter element 10, forming a filter cake on the outer surface of the filter element 10, enabling the filtrate to flow into the filter 6, enabling the filtrate to flow out from an outlet of the filter 6 and then enter a downstream working section to finish filtering, strictly controlling the pressure difference between the front and the back of the filter 6 in the whole filtering process, increasing the filter cake thickness along with the increase of the filtering time, continuously increasing the pressure difference between the front and the back of the filter 6, opening the compressed nitrogen port 2 until the pressure is increased to 0.5MPa if the pressure cannot be controlled during pressure relief, opening the dirty discharge port 12, after normal filtering for a period of time, enabling the filter cake layer to exceed a certain thickness, reducing the speed of the filtrate passing through the filter cake layer, reducing the filtering efficiency, performing back flushing on the filter 6 when the set filtering time or pressure difference is reached, adding back flushing in the filtering process, and greatly improving the filtering function of the filter 6.

6 inner wall tops intermediate position fixedly connected with filter cores 10 of filter, pickling tank 9 tops run through and fixedly connected with gas vent 8, pickling tank 9 bottoms run through and fixedly connected with

leakage fluid dram

11, 3 right side intermediate positions on ware top run through and fixedly connected with

desalination mouth

4, 6 bottoms of filter run through and fixedly connected with arrange

dirty mouthful

12, 14 outer walls of pipeline are provided with pickling pump 13, through opening first exhaust port 1, release pressure to 0.5MPa with 6 filter, open dirty mouthful 12 of arranging, the filter cake drops from dirty mouthful 12 of arranging, filter 6 moves the back for a long time, the great material of filter core 10 surface viscosity can't be through compressed air regeneration sanitization. After the filter 6 is subjected to back washing, the pickling pump 13 is started to enable the pickling tank 9 to carry out circulating pickling on the filter element 10, after a certain time, the pickling pump 13 is closed, the second exhaust port 8 is opened to discharge harmful gas, the liquid discharge port 11 is opened, and acid liquid in the filter 6 is compressed to enter the liquid discharge port 11. Desalted water enters the filter 6 through the desalting port 4 to clean the filter element 10 after acid washing, and the filter 6 is connected with the acid washing tank 9 through the pipeline 14, so that the self-cleaning performance of the filter 6 is improved, and the follow-up cleaning of the filter 6 is reduced.

The working principle is as follows: the black water enters the filter 6 through the black water port 5, when the filtrate in the filtrate port 7 enters the initial filter 6 in the filter top 3 from the tops of the two sides of the filter top 3 under the action of system pressure, because no filter cake exists on the surface of the filter element 10, the feed flow can be adjusted to be small, the filter element 10 is prevented from being impacted by too fast flow speed, the liquid passes through the micropores of the filter element 10, solid particles are intercepted by the filter element 10, a filter cake is formed on the outer surface of the filter element 10, the filtrate flows into the filter 6, the filtrate flows out from the outlet of the filter 6 and enters a downstream working section to complete the filtration, in the whole filtration process, the pressure difference between the front part and the rear part of the filter 6 is strictly controlled, the filter cake becomes thicker and thicker along with the increase of the filtration time, if the pressure cannot be controlled during pressure relief, the compressed nitrogen gas port 2 is opened until the pressure rises to 0.5MPa, the dirty discharge port 12 is opened, and after the normal filtration is carried out for a period, the filter cake layer exceeds a certain thickness, the speed of filtrate passing through a filter cake layer is reduced, the filtration efficiency is poor, when the set filtration time or pressure difference is reached, the filter 6 is backwashed, the filter 6 is decompressed to 0.5MPa by opening the first exhaust port 1, the dirty exhaust port 12 is opened, filter cakes fall from the dirty exhaust port 12, and substances with high surface viscosity of the filter element 10 cannot be regenerated and cleaned by compressed air after the filter 6 runs for a long time. After the filter 6 is subjected to back washing, the pickling pump 13 is started to enable the pickling tank 9 to carry out circulating pickling on the filter element 10, after a certain time, the pickling pump 13 is closed, the second exhaust port 8 is opened to discharge harmful gas, the liquid discharge port 11 is opened, and acid liquid in the filter 6 is compressed to enter the liquid discharge port 11. Desalted water enters the filter 6 through the desalting port 4 to clean the filter element 10 after pickling, and the filter 6 is connected with the pickling tank 9 through a pipeline 14.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. A coal gasification black water filtering system comprises a filter (6), and is characterized in that: filter (6) top intermediate position fixedly connected with ware top (3), ware top (3) top left side is run through and fixedly connected with compressed nitrogen gas port (2), ware top (3) top right side is run through and the first exhaust port of fixedly connected with (1), ware top (3) right side top is run through and fixedly connected with filtrate mouth (7), through pipeline (14) fixedly connected with pickling tank (9) between ware top (3) bottom and filter (6) right side bottom, filter (6) left side bottom is run through and fixedly connected with black mouth of a river (5).

2. The coal gasification black water filtration system according to claim 1, wherein: and a filter element (10) is fixedly connected to the middle position of the top of the inner wall of the filter (6).

3. The coal gasification black water filtration system according to claim 1, wherein: the top of the pickling tank (9) penetrates through and is fixedly connected with an exhaust port (8).

4. The coal gasification black water filtration system according to claim 1, wherein: the bottom of the pickling tank (9) penetrates through and is fixedly connected with a liquid outlet (11).

5. The coal gasification black water filtration system according to claim 1, wherein: the middle position of the right side of the device top (3) penetrates through and is fixedly connected with a desalting port (4).

6. The coal gasification black water filtration system according to claim 1, wherein: the bottom of the filter (6) penetrates through and is fixedly connected with a dirt discharge opening (12).

7. The coal gasification black water filtration system according to claim 1, wherein: and an acid washing pump (13) is arranged on the outer wall of the pipeline (14).