CN117703721A

CN117703721A - Backwater slag separating device

Info

Publication number: CN117703721A
Application number: CN202311787456.2A
Authority: CN
Inventors: 余大明; 王曦岳; 王铁军; 杨正华; 刘波; 梁晋; 王伟; 赵建光; 何敏; 雍飞
Original assignee: Pangang Group Mining Co Ltd
Current assignee: Pangang Group Mining Co Ltd
Priority date: 2023-12-22
Filing date: 2023-12-22
Publication date: 2024-03-15

Abstract

The invention discloses a backwater slag separation device, which relates to the technical field of slurry transportation of a tailing pond and a diaphragm pump, and comprises a water inlet pipe of a diaphragm pump flushing water pipe, a backwater slag separation device, a water outlet pipe connected between a diaphragm pump or a feeding pump, a diaphragm pump arranged on the water outlet pipe and a slag separation pipe connected with the water inlet pipe and the water outlet pipe, wherein the axial direction of the slag separation pipe is staggered with the axial direction of the water inlet pipe and the water outlet pipe, a slag separation plate is arranged at the joint of the slag separation pipe and the water inlet pipe and the joint of the slag separation pipe and the water outlet pipe, a plurality of filtering holes are arranged on the slag separation plate, the aperture of each filtering hole is smaller than the maximum particle diameter allowed to pass through, the slag separation plate is perpendicular to the axial direction of the slag separation pipe, and the slag separation plate is in fit contact with the inner wall of the slag separation pipe. The backwater slag separation device effectively solves the problems of diaphragm pump valve blocking and the like caused by backwater carrying large-particle stones such as cobbles and the like when backwater of a tailing pond is used as production supplementing water by mine enterprises.

Description

Backwater slag separating device

Technical Field

The invention relates to the technical field of slurry conveying of tailing ponds and diaphragm pumps, in particular to a backwater slag separation device.

Background

The backwater slag separation device is characterized in that a water inlet end is connected with a water using end through a straight pipe, and a diaphragm pump is arranged at the water using end. During the maintenance of the diaphragm pump, the diaphragm pump is required to be subjected to single flushing or integral cleaning, and then diaphragm pump maintenance operation is carried out, and the flushing production water of the diaphragm pump is derived from the backwater of the tailing pond. During operation, large objects such as coarse-grain slag cobbles and the like enter the diaphragm pump conveying system, so that a valve clamping phenomenon of an inlet and outlet check valve body occurs in a single diaphragm pump conveying system or the whole diaphragm pump conveying system, the safety and environment-friendly production of enterprises are seriously influenced, the record of the maximum influence is up to 72 hours, and the large economic loss is caused.

Through separating sediment system to the production process, have carried out investigation and research to tailing storehouse clarified water layer degree of depth and reservoir area rock lithology etc. simultaneously to will lead to the cobblestone of card valve to have carried out the contrast analysis with cobblestone in the reservoir area, preliminary judgement causes the main reason of diaphragm pump card valve because, in rinsing the maintenance operation in-process to the diaphragm pump, the backwater from the tailing storehouse smugglies big granule cobblestone of carrying and gets into diaphragm pump and supporting front end pipe network, leads to card valve incident.

In summary, how to effectively solve the problems of diaphragm pump valve blocking and the like caused by that backwater carries large-particle stones such as cobbles and the like when backwater of a tailing pond is used as production supplementing water by mine enterprises is a problem which needs to be solved by the technicians in the field at present.

Disclosure of Invention

The invention aims to provide a backwater slag separation device which effectively solves the problems of diaphragm pump clamping valves and the like caused by backwater carrying large-particle stones such as cobbles and the like when backwater of a tailing pond is used as production supplementing water for mine enterprises.

In order to solve the technical problems, the invention provides the following technical scheme:

the utility model provides a return water separates sediment device, includes diaphragm pump wash pipe's inlet tube, return water separates sediment device and connects the outlet pipe between diaphragm pump or the feed pump, locates diaphragm pump on the outlet pipe and connect separate the sediment pipe of inlet tube and outlet pipe, separate the axis direction of sediment pipe with the axis direction dislocation set of inlet tube and outlet pipe, separate the sediment pipe be in separate the junction of sediment pipe and inlet tube with separate the junction of sediment pipe and outlet pipe and be equipped with and separate the sediment board, be equipped with a plurality of filtration pore on the sediment board, filtration pore aperture is less than the maximum particle diameter of permission, separate the sediment board with separate the axis direction of sediment pipe perpendicularly, separate the sediment board with separate the inner wall laminating contact of sediment pipe.

Optionally, the slag separation pipe is a slag separation gradually-expanding pipe, the large-diameter section is connected with the water outlet pipe, the small-diameter section is connected with the water inlet pipe, and the slag separation plate is arranged on the large-diameter section.

Optionally, the large-diameter section and the small-diameter section of the slag separation gradually-expanding pipe are connected through a conical section, and the large-diameter section, the conical section and the small-diameter section are connected through welding.

Optionally, the water inlet pipe and the water outlet pipe comprise straight line segments and arc segments connected with the straight line segments, and the other ends of the arc segments are connected with the slag separation pipe;

the arc section is connected with the slag separation pipe through welding.

Optionally, an inspection opening is formed in the slag separation pipe above the water outlet pipe, and an inspection cover is arranged at the inspection opening.

Optionally, the inspection port is arranged at the upper port of the slag separation pipe, a first flange is arranged at the upper port of the slag separation pipe, and the inspection cover is connected with the upper port of the slag separation pipe through the first flange.

Optionally, the slag separation pipe is provided with a slag storage area below the water inlet pipe, the slag separation pipe is provided with a slag discharge port in the slag storage area, and a slag discharge valve is arranged at the slag discharge port.

Optionally, the slag separation pipe comprises a cylindrical pipe and a tapered conical pipe connected with the cylindrical pipe in the slag storage area, and an opening at the lower end of the conical pipe is connected with the slag discharge valve through a second flange;

the lower end of the slag discharging valve is connected with a slag discharging pipe through a third flange.

Optionally, a lower limiting plate is fixed on the inner wall of the slag separation pipe, and the slag separation plate is fixed on the lower limiting plate.

Optionally, an upper limiting plate is fixed on the inner wall of the slag separation pipe, and the slag separation plate is clamped between the lower limiting plate and the upper limiting plate.

The backwater slag separation device provided by the invention comprises a water inlet pipe, a water outlet pipe, a diaphragm pump and a slag separation pipe, wherein the diaphragm pump is arranged on the water outlet pipe, and clarified water in a tailing pond is returned to a process flow of ore dressing and tailing conveying through the diaphragm pump for use. The water inlet pipe is a diaphragm pump flushing water pipe, and the water outlet pipe is arranged between the backwater slag separation device and the diaphragm pump or the feeding pump. The slag separation pipe connects the tail end of the water inlet pipe and the beginning end of the water outlet pipe to form a closed conveying pipeline. The axial direction of the slag separation pipe and the axial direction of the water inlet pipe and the water outlet pipe are arranged in a staggered mode, namely, the axial direction of the slag separation pipe and the axial direction of the water inlet pipe and the water outlet pipe are not in the same straight line.

The slag separation pipe is provided with a slag separation plate at the joint of the slag separation pipe and the water inlet pipe and the joint of the slag separation pipe and the water outlet pipe, and the slag separation plate is arranged at a proper position of flushing water at the front end of the inlet of the diaphragm pump or a water supplementing pipeline, namely, the slag separation plate is added on the front end of the inlet of the diaphragm pump or a water producing pipeline at the front end of the feed pump of the diaphragm pump. The slag separation plate is perpendicular to the axial direction of the slag separation pipe, the shape and the size of the slag separation plate are equal to those of the inner wall of the slag separation pipe, and the slag separation plate and the inner wall of the slag separation pipe are in fit contact. The inner walls of the slag separation plate and the slag separation pipe can be in transition fit and also can be in clearance fit, so that the slag separation plate is conveniently and smoothly placed in the slag separation pipe, the clearance between the slag separation plate and the slag separation pipe is small, particles above the maximum size level allowed to pass through by the diaphragm pump cannot pass through, and the slag separation plate is not easy to incline and overturn in the slag separation pipe. The slag separation plate is provided with a plurality of filtering holes, the aperture of each filtering hole is smaller than the maximum particle diameter allowing the diaphragm pump to pass through, sundries such as large-particle cobbles are blocked below the slag separation plate, sundries such as large-particle cobbles are prevented from entering the water outlet pipe, and therefore the diaphragm pump cannot be blocked by the sundries such as large-particle cobbles.

The backwater slag isolation device provided by the invention utilizes backwater of a tailing pond or valley mountain water as production supplement water, or directly uses river water as production water and the like in the water taking process, so that the problem of easiness in carrying sundries such as cobbles and the like with the maximum passing particle size above the allowable maximum passing particle size of a membrane pump conveying process is solved. The main flow slag separation process of tailing conveying or slurry conveying is matched, so that the whole flow slag separation of tailing conveying or slurry conveying is finally realized, no valve blocking event occurs, the safe, environment-friendly and stable operation of a conveying system is ensured, and the safety and environment-friendly risks and the operation cost are reduced.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a backwater slag separator according to an embodiment of the present invention;

fig. 2 is an enlarged view of the slag separator of fig. 1.

The figures are marked as follows:

the device comprises a water inlet pipe 1, a water outlet pipe 2, an inspection cover 3, a first flange 4, a slag separation plate 5, a lower limit plate 6, a slag separation pipe 7, a slag storage area 8, a second flange 9, a third flange 10, a slag discharge valve 11, a filtering hole 51 and a reinforcing rib 52.

Detailed Description

The invention provides a backwater slag separation device which effectively solves the problems of diaphragm pump blocking valves and the like caused by backwater carrying large-particle stones such as cobbles and the like when backwater of a tailing pond is used as production supplementing water for mine enterprises.

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 2, fig. 1 is a schematic structural diagram of a backwater slag separator according to an embodiment of the present invention; fig. 2 is an enlarged view of the slag separator of fig. 1.

In a specific embodiment, the backwater slag separation device provided by the invention comprises a water inlet pipe 1 of a diaphragm pump flushing water pipe, a backwater slag separation device, a water outlet pipe 2 connected between the diaphragm pump or the feeding pump, a diaphragm pump arranged on the water outlet pipe 2, and a slag separation pipe 7 connected with the water inlet pipe 1 and the water outlet pipe 2, wherein the axial direction of the slag separation pipe 7 is staggered with the axial direction of the water inlet pipe 1 and the water outlet pipe 2, the slag separation pipe 7 is provided with a slag separation plate 5 at the joint of the slag separation pipe 7 and the water inlet pipe 1 and the joint of the slag separation pipe 7 and the water outlet pipe 2, the slag separation plate 5 is provided with a plurality of filtering holes 51, the pore diameter of the filtering holes 51 is smaller than the maximum particle diameter allowed to pass through, the slag separation plate 5 is perpendicular to the axial direction of the slag separation pipe 7, and the slag separation plate 5 is in contact with the inner wall of the slag separation pipe 7.

In the structure, the backwater slag separation device comprises a water inlet pipe 1, a water outlet pipe 2, a diaphragm pump and a slag separation pipe 7, wherein the diaphragm pump is arranged on the water outlet pipe 2, and clarified water in a tailing pond is returned to the technological process of mineral dressing and tailing conveying through the diaphragm pump for use. The water inlet pipe 1 is a diaphragm pump flushing pipe, and the water outlet pipe 2 is arranged between the backwater slag separation device and the diaphragm pump or the feeding pump. The slag separation pipe 7 connects the tail end of the water inlet pipe 1 and the beginning end of the water outlet pipe 2 to form a closed conveying pipeline. The axial direction of the slag separation pipe 7 is staggered with the axial directions of the water inlet pipe 1 and the water outlet pipe 2, namely, the axial direction of the slag separation pipe 7 is not in the same straight line with the axial directions of the water inlet pipe 1 and the water outlet pipe 2.

It should be noted that, the axial direction of the water inlet pipe 1 and the water outlet pipe 2 may be on a straight line, for example, the two ends of the straight pipe originally connected to the water inlet end and the water outlet end are cut off, the straight pipe at the water inlet end and the water outlet end is reserved, the middle straight pipe part is removed, the original part of the pipeline is utilized, the connection is convenient, the cost is reduced, the axial direction of the water inlet pipe 1 and the water outlet pipe 2 may not be on a straight line, and the positions of the water inlet pipe 1 and the water outlet pipe 2 are set according to the space positions.

The slag separation pipe 7 is provided with a slag separation plate 5 at the joint of the slag separation pipe 7 and the water inlet pipe 1 and the joint of the slag separation pipe 7 and the water outlet pipe 2, and the slag separation plate 5 is arranged at a proper position of flushing water at the front end of the inlet of the diaphragm pump or a water supplementing pipeline, namely, the slag separation plate 5 is added on the front end of the inlet of the diaphragm pump or a water producing pipeline at the front end of the feed pump of the diaphragm pump. The slag separation plate 5 is perpendicular to the axial direction of the slag separation pipe 7, the shape and the size of the inner wall of the slag separation plate 5 are equal to those of the inner wall of the slag separation pipe 7, and the slag separation plate 5 and the inner wall of the slag separation pipe 7 are in fit contact. The inner walls of the slag separation plate 5 and the slag separation pipe 7 can be in transition fit or clearance fit, so that the slag separation plate 5 can be conveniently and smoothly placed in the slag separation pipe 7, the clearance between the slag separation plate 5 and the slag separation pipe 7 is small, particles above the maximum size level allowed to pass through by the diaphragm pump cannot pass through, and the slag separation plate 5 is not easy to incline and overturn in the slag separation pipe 7. The diameter of the slag separation plate 5 is selected mainly according to the flow rate of the fluid, and the initial slag content of the fluid is determined.

The slag separation plate 5 is provided with a plurality of filtering holes 51, the aperture of the filtering holes 51 is smaller than the maximum particle diameter allowing the diaphragm pump to pass through, sundries such as large-particle cobbles are blocked below the slag separation plate 5, sundries such as large-particle cobbles are prevented from entering the water outlet pipe 2, and therefore the diaphragm pump cannot be blocked by the sundries such as the large-particle cobbles.

The backwater slag separation device is only a preferred scheme, and is particularly not limited to the scheme, and can be adjusted in a targeted manner according to actual needs on the basis, so that different embodiments are obtained, the slag separation pipe 7 is a slag separation gradually-expanding pipe, the large-diameter section is connected with the water outlet pipe 2, the small-diameter section is connected with the water inlet pipe 1, and the slag separation plate 5 is arranged on the large-diameter section.

In a specific embodiment, the slag separation pipe 7 is a slag separation gradually-expanding pipe and comprises a large-diameter section and a small-diameter section, and the diameter of the large-diameter section is larger than that of the small-diameter section. The big footpath section is connected with outlet pipe 2, and the path section is connected with inlet tube 1, separates slag plate 5 and sets up in the big footpath section to the diameter that separates slag plate 5 is greater than the diameter of path section, guarantees that the sum of filtration pore 51 cross-sectional area on the slag plate 5 is equivalent with the cross-sectional area of path section, and the face area of filtration pore 51 is not offered to the excessive area compensative slag plate 5, thereby guarantees that the excessive water volume in slag plate 5 department is equivalent with inlet tube 1 and outlet pipe 2's water volume, can not reduce the water pressure.

On the basis of the specific embodiments, the large-diameter section and the small-diameter section of the slag separation gradually-expanding pipe are connected through the conical section, and the large-diameter section, the conical section and the small-diameter section are connected through welding.

In one embodiment, the slag separation and gradual expansion pipe comprises a large-diameter section, a conical section and a small-diameter section, and is smooth and easy to connect. The large-diameter section, the conical section and the small-diameter section of the slag separation gradually-expanded pipe can be connected through welding, so that the connection is firm, and water leakage is not easy to occur. Of course, the large-diameter section, the conical section and the small-diameter section of the slag separation gradually-expanded pipe can be connected through the flange plate, the large-diameter section, the conical section and the small-diameter section can be detachably connected, and the damaged or faulty part can be replaced independently, so that the cost is reduced.

On the basis of the specific embodiments, the water inlet pipe 1 and the water outlet pipe 2 comprise straight line segments and arc line segments connected with the straight line segments, and the other ends of the arc line segments are connected with slag separation pipes 7;

the arc section is connected with the slag separation pipe 7 by welding.

In a specific embodiment, the straight line section is easy to connect with the device of the water inlet end and the water outlet end, the slag separation pipe 7 is connected with the straight line section through the arc line section, the arc line section has no right angle and other bent angles, the resistance to water passing is small, the space occupied by the arc line section is small, and the structure is more compact.

The arc section and the slag separation pipe 7 can be connected through welding, so that leakage is not easy to occur; can also be connected through the flange plate, and is convenient to detach.

Optionally, the arc sections of the water inlet pipe 1 and the water outlet pipe 2 are connected through a connecting rod in the vertical direction, so that the overall strength is improved, the mutual support is realized, and the shaking is reduced.

In another more reliable embodiment, based on any one of the above embodiments, the slag separation pipe 7 is provided with an inspection opening above the water outlet pipe 2, and the inspection opening is provided with an inspection cover 3.

In a specific embodiment, the inspection cover 3 is opened, the inspection opening is leaked, the inspection opening is seen downwards to check whether the position of the slag separation plate 5 is correct or whether the slag separation plate is flushed or inclined by water flow, and the filtering holes 51 are blocked, so that the position of the slag separation plate 5 is adjusted in time, the slag separation plate 5 is replaced or sundries in the filtering holes 51 are combed, and smooth water and slag separation of the slag separation plate 5 is ensured.

On the basis of the above-mentioned specific embodiments, the inspection port is arranged at the upper port of the slag separation pipe 7, the upper port of the slag separation pipe 7 is provided with the first flange 4, and the inspection cover 3 is connected with the upper port of the slag separation pipe 7 through the first flange 4.

In a specific embodiment, the upper port of the slag separation pipe 7 is parallel to the plate surface of the slag separation plate 5, and the slag separation plate 5 is positioned right below the upper port, and the upper port and the slag separation plate 5 are directly aligned, so that the situation of the slag separation plate 5 can be observed more conveniently and clearly.

The inspection cover 3 is connected with the upper port of the slag separation pipe 7 through the first flange 4, one end of the inspection cover 3 is connected with one end of the first flange 4 of the slag separation pipe 7 through a rotating shaft, and the other end is connected with the other end through a bolt. When opening, take down the bolt, rotate inspection lid 3 and can open, connect conveniently, can dismantle the connection, it is comparatively convenient to use.

In another more reliable embodiment, based on any one of the above embodiments, the slag separator 7 is provided with a slag storage area 8 below the water inlet pipe 1, the slag separator 7 is provided with a slag discharge port in the slag storage area 8, and a slag discharge valve 11 is provided at the slag discharge port.

In a specific embodiment, the slag separation pipe 7 extends to the lower part of the water inlet pipe 1, a slag storage area 8 is formed below the water inlet pipe 1, filtered impurities fall into the slag storage area 8, a slag discharge valve 11 of a slag discharge port is opened, slag discharge work can be carried out, impurities in the slag storage area 8 are cleaned, excessive accumulation of impurities is prevented, the water inlet pipe 1 and the slag separation plate 5 are blocked, and smooth water passing is ensured. The slag discharging valve 11 is a standard valve, and the pressure grade is selected according to the field fluid pressure.

On the basis of the specific embodiments, the slag separation pipe 7 comprises a cylindrical pipe and a tapered conical pipe connected with the cylindrical pipe, and the lower end opening of the conical pipe is connected with the slag discharge valve 11 through a second flange 9;

the lower end of the slag discharging valve 11 is connected with a slag discharging pipe through a third flange 10.

In a specific embodiment, the slag separation pipe 7 comprises a cylindrical pipe and a tapered conical pipe, the tapered conical pipe is connected with the cylindrical pipe, an upper end opening of the conical pipe is equal to the cylindrical pipe in a straight descending manner, a lower end opening of the conical pipe is equal to a flange opening of the slag discharge valve 11, and the slag separation pipe 7 is connected with the slag discharge valve 11 through the conical pipe. Optionally, the lower end opening of the conical tube is connected with the slag discharging valve 11 through the second flange 9, and the conical tube is detachably connected, so that the conical tube is convenient to maintain and replace.

The lower end of the slag discharging valve 11 is connected with a slag discharging pipe through a third flange 10, optionally, the slag discharging pipe is a 90-degree bent pipe, the conveying direction of sundries is changed, the slag discharging valve is convenient to connect with other devices, the sundries are conveyed to a set position through the slag discharging pipe, the slag discharging valve is convenient to use, and the labor intensity is reduced. The flanges of the present application may be standard welded flanges, the grade being determined by the process pressure conditions.

In another more reliable embodiment, on the basis of any one of the above embodiments, a lower limiting plate 6 is fixed on the inner wall of the slag separation pipe 7, and the slag separation plate 5 is fixed on the lower limiting plate 6.

In a specific embodiment, the lower limiting plate 6 is perpendicular to the axial direction of the slag separation pipe 7, the lower limiting plate 6 is firmly fixed at a corresponding position, the slag separation plate 5 is placed on the lower limiting plate 6, and the slag separation plate 5 is supported and fixed through the lower limiting plate 6.

On the basis of the above-mentioned specific embodiments, the inner wall of the slag separation pipe 7 is fixed with an upper limiting plate, and the slag separation plate 5 is clamped between the lower limiting plate 6 and the upper limiting plate.

In a specific embodiment, the slag separation plate 5 is clamped between the lower limit plate 6 and the upper limit plate, the lower surface of the slag separation plate 5 is supported by the lower limit plate 6, the upper limit plate is pressed and covered, and the upper limit plate limits the slag separation plate 5 to prevent the slag separation plate 5 from being flushed by water flow.

Optionally, the lower limiting plate 6 and the upper limiting plate are arranged symmetrically up and down, and the slag separation plate 5 is balanced in up-down stress and not easy to deflect and incline. The slag separation plate 5, the lower limit plate 6 and the upper limit plate can be made of stainless steel, are not easy to rust and corrode, and can be made of manganese steel, so that the cost is low.

The slag separator 5 is preferably a metal plate with a thickness of 15-25mm, such as 20mm, and has good impact and folding resistance. Optionally, the slag separation plate 5 is provided with reinforcing ribs 52, so that the strength of the slag separation plate 5 is increased.

The lower limiting plate 6 and the upper limiting plate are equilateral triangles, the three corners of the lower limiting plate 6 and the upper limiting plate on the inner wall of the slag separation pipe 7 are inscribed, and the three corners are welded on the inner wall of the slag separation pipe 7, so that the connection is convenient and firm.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The backwater slag separating device provided by the invention is described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a return water separates sediment device, its characterized in that, including diaphragm pump wash pipe's inlet tube (1), return water separate sediment device and connect outlet pipe (2) between diaphragm pump or the feed pump, locate diaphragm pump on outlet pipe (2) and connect separate sediment pipe (7) of inlet tube (1) and outlet pipe (2), separate the axis direction of sediment pipe (7) with the axis direction dislocation set of inlet tube (1) and outlet pipe (2), separate sediment pipe (7) be in the junction of sediment pipe (7) and inlet tube (1) with separate the junction of sediment pipe (7) and outlet pipe (2) and be equipped with and separate sediment board (5), be equipped with a plurality of filtration pore (51) on separating sediment board (5), filtration pore (51) aperture are less than the allowable biggest particle diameter that passes through, separate sediment board (5) with separate the axis direction of sediment pipe (7) is perpendicular, separate sediment board (5) with separate the inner wall laminating of sediment pipe (7).

2. The backwater slag separation device according to claim 1, wherein the slag separation pipe (7) is a slag separation gradually-expanding pipe, a large-diameter section is connected with the water outlet pipe (2), a small-diameter section is connected with the water inlet pipe (1), and the slag separation plate (5) is arranged on the large-diameter section.

3. The backwater slag separation device according to claim 2, wherein the large diameter section and the small diameter section of the slag separation gradually-expanding pipe are connected through a conical section, and the large diameter section, the conical section and the small diameter section are connected through welding.

4. A backwater slag separation device according to claim 3, wherein the water inlet pipe (1) and the water outlet pipe (2) comprise straight line segments and arc segments connected with the straight line segments, and the other ends of the arc segments are connected with the slag separation pipe (7);

the arc line section is connected with the slag separation pipe (7) through welding.

5. The backwater slag separation device according to claim 1, wherein the slag separation pipe (7) is provided with an inspection port above the water outlet pipe (2), and an inspection cover (3) is arranged at the inspection port.

6. The backwater slag separation device according to claim 5, wherein the inspection port is arranged at the upper port of the slag separation pipe (7), a first flange (4) is arranged at the upper port of the slag separation pipe (7), and the inspection cover (3) is connected with the upper port of the slag separation pipe (7) through the first flange (4).

7. The backwater slag separation device according to claim 1, wherein the slag separation pipe (7) is provided with a slag storage area (8) below the water inlet pipe (1), the slag separation pipe (7) is provided with a slag discharge port in the slag storage area (8), and a slag discharge valve (11) is arranged at the slag discharge port.

8. The backwater slag separation device according to claim 7, wherein the slag separation pipe (7) comprises a cylindrical pipe and a tapered conical pipe connected with the cylindrical pipe, and a lower end opening of the conical pipe is connected with the slag discharge valve (11) through a second flange (9);

the lower end of the slag discharging valve (11) is connected with a slag discharging pipe through a third flange (10).

9. The backwater slag separation device according to any one of claims 1 to 8, wherein a lower limiting plate (6) is fixed on the inner wall of the slag separation pipe (7), and the slag separation plate (5) is fixed on the lower limiting plate (6).

10. The backwater slag separation device according to claim 9, wherein an upper limiting plate is fixed on the inner wall of the slag separation pipe (7), and the slag separation plate (5) is clamped between the lower limiting plate (6) and the upper limiting plate.