Screening anti-blocking device and screening anti-blocking method for ash discharge pipeline

Abstract

The invention discloses a screening anti-blocking device and a screening anti-blocking method for an ash discharging pipeline, and relates to the technical field of boiler slag discharging. Firstly, the two ends of a slag discharging pipe are fixedly communicated with an ash hopper and a mortar pool; meanwhile, the screening piece is installed on the slag discharging pipe, and at the moment, the first edge baffle, the second edge baffle and the center blocking piece extend into the ash and slag channel; then, an ash bucket gate is opened, the mortar flows into the slag discharging pipe from the ash bucket, and when the mortar flows through the screening piece, foreign matter such as large-size anti-abrasion tiles and pipe clamps is blocked by the screening piece; meanwhile, abnormal internal pressure of the pipeline is caused by foreign matter blockage, a pressure monitoring device gives an alarm, and workers go to the deslagging pipe for inspection; during inspection, the gate of the ash bucket is closed firstly, then the screening piece is detached, the anti-abrasion tile, the pipe clamp and other foreign matter are taken out, then the screening piece is installed again, slurry discharging of the ash bucket is recovered, and normal operation of equipment is achieved. The boiler slag discharging pipeline solves the problems that foreign matter falls into an existing boiler slag discharging pipeline, the pipeline is prone to being blocked, and a blocking point is difficult to find.

Description

Technical Field

[0001] The invention relates to the technical field of boiler slag discharge, and in particular to a screening and anti-blocking device for an ash discharge pipeline and a screening and anti-blocking method. Background Art

[0002] The bottom ash discharge system is one of the important equipment in the boiler auxiliary system of coal-fired power plants. The bottom of the boiler is equipped with an ash hopper, which is divided into two V-shaped hoppers, commonly known as "trouser legs", to collect ash. The hopper wall is lined with refractory materials to resist boiler heat and ash abrasion. The ash hopper is always filled with water to cool the ash and reduce ash agglomeration. The cooling water flushes the entire inner wall to form a water curtain to protect the inner wall from overheating. The overflow water flows to the ditch through the sealing box. The ash is discharged from the bottom ash hopper through the ash gate, which is driven by a hydraulic cylinder. There is a slag crusher under the ash gate housing. The slag crusher crushes the ash to a certain particle size, making it easy to transport the ash water through the discharge pipe to the ash pump forebay through the water ejector. It is discharged every 8 hours. As the last link of the bottom ash discharge system, the ash discharge pipeline plays a decisive role in the normal operation of the bottom ash system.

[0003] The specification of the discharge pipeline is DN150 wear-resistant alloy steel pipe, which is divided into ground and trench layout. The pipeline in the trench is covered with cement cover. During operation, foreign objects such as boiler anti-wear tiles and pipe clamps fall into the bottom ash hopper and enter the ash discharge pipeline after passing through the slag crusher, which is easy to cause pipeline blockage defects. Due to the long pipeline, especially the blockage caused by foreign objects entering the pipeline in the trench, the cement cover needs to be opened, and it is very difficult to find the blockage point. The maintenance and troubleshooting operations require a lot of manpower and a long time, which seriously affects the normal operation of the unit. Summary of the invention

[0004] In view of the problem that foreign matter in the existing boiler slag discharge pipeline falls into the pipeline, which easily causes pipeline blockage and it is difficult to find the blockage point, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a screening and anti-blocking device and a screening and anti-blocking method for ash discharge pipelines, which are arranged on the ground pipeline and are convenient for cleaning and maintenance by blocking larger foreign objects in the ground pipeline.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a screening and anti-blocking device for ash discharge pipelines, which includes a slag discharge pipe, in which an ash channel is opened, and ash water flows along the ash channel; a screening element, wherein the screening element is arranged in several groups in parallel, and the several groups of the screening elements are blocked on the flow path of the ash water.

[0007] As a preferred solution of the ash discharge pipeline screening and anti-blocking device of the present invention, wherein: the screening element is provided with at least one group; the screening element includes a first edge baffle, a second edge baffle and a center baffle, and the first edge baffle and the second edge baffle are arranged on both sides of the center baffle; the first edge baffle, the second edge baffle and the center baffle are connected to the same side ends with a cover plate.

[0008] As a preferred solution of the ash discharge pipeline screening and anti-blocking device of the present invention, the first edge baffle and the second edge baffle are movably arranged on both sides of the central baffle; the displacement path of the first edge baffle forms a first moving line, and the displacement path of the second edge baffle forms a second moving line, and the first moving line, the second moving line and the axis of the ash discharge pipe are parallel to each other.

[0009] As a preferred solution of the ash discharge pipeline screening and anti-blocking device of the present invention, wherein: the top of the cover plate is symmetrically provided with displacement slide grooves, and the middle part of the top of the cover plate is also fixedly connected with an installation sleeve; the middle part of the installation sleeve is provided with a rotation groove, and the inner walls of the rotation groove on both sides are symmetrically provided with locking grooves.

[0010] As a preferred solution of the ash discharge pipeline screening and anti-blocking device of the present invention, wherein: a sliding hole is opened at the bottom of the displacement slide groove, and an embedded groove is opened on the side wall of the displacement slide groove close to the rotating groove, and the embedded groove is connected with the rotating groove through a snap-fit ​​groove.

[0011] As a preferred solution of the ash discharge pipeline screening and anti-blocking device of the present invention, a cylinder is installed in the displacement slide groove, a mounting plate is fixed on one side of the cylinder, and the mounting plate is fixed to the top end surface of the cover plate; the piston rod of the cylinder can move axially along the displacement slide groove.

[0012] As a preferred solution of the ash discharge pipeline screening and anti-blocking device of the present invention, wherein: the first edge baffle includes a sliding block and a blocking plate fixed at the bottom end thereof, and the side wall of the sliding block adjacent to the blocking plate is also fixedly connected to a docking plate, and a plurality of groups of latch teeth are arranged on the side of the docking plate away from the sliding block; a flow hole is opened in the blocking plate, and the sliding block can slide in the displacement slide groove and be fixedly connected to the end of the piston rod; the blocking plate can slide in the sliding hole, and the docking plate can slide in the embedded groove; the structure of the second edge baffle is the same as that of the first edge baffle, and the second edge baffle is centrally symmetrically arranged in the displacement slide groove on the other side.

[0013] As a preferred solution of the ash discharge pipeline screening and anti-blocking device of the present invention, the center stopper includes a rotating sleeve and a bearing column and a stirring column fixedly connected at the top and bottom ends thereof, the outer rotating sleeve of the bearing column is connected with a bearing, and a plurality of groups of tooth blocks are fixed at equal intervals on the circumferential outer wall of the rotating sleeve; the rotating sleeve can be placed in the rotating groove in cooperation with rotation, the outer wall of the bearing is fixed to the inner wall of the rotating groove, and the tooth block can pass through the engaging groove and engage with the engaging teeth; a through hole is opened on the stirring column, and a plurality of groups of shift plates are also fixedly connected to the outer wall of the stirring column.

[0014] As a preferred scheme of the ash discharge pipeline screening and anti-blocking device of the present invention, wherein: a rotating hole is opened in the middle of the bottom of the rotating groove of the installation sleeve, and the inner wall of the rotating hole is symmetrically opened with insertion grooves, and the stirring column and the stirring column can cooperate to pass through the rotating hole and the insertion groove; the top of the installation sleeve is also sealed and fixed with a top cover; the top of the cover plate is detachably fixed with a cover shell and a sealing cover in turn, and the top of the sealing cover is also fixed with a handle; the top of the slag discharge pipe is connected and fixed with an external box, and the cover plate is detachably and sealably fixed to the top of the external box.

[0015] To solve the above technical problems, the present invention also provides the following technical solutions: a method for screening and preventing blockage in ash discharge pipes, which is based on the above-mentioned ash discharge pipe screening and preventing blockage device, including first, connecting and fixing both ends of the slag discharge pipe with the ash hopper and the slurry pool; at the same time, the screening piece is installed on the slag discharge pipe, and at this time, the first edge baffle, the second edge baffle and the center baffle extend into the ash channel; then, the ash hopper gate is opened, and the slurry flows from the ash hopper into the slag discharge pipe. When flowing through the screening piece, larger foreign matter such as anti-wear tiles and pipe clamps is blocked by the screening piece; at the same time, the blockage of foreign matter causes abnormal pressure inside the pipeline, and an alarm is given through the pressure monitoring device, and the staff goes to the slag discharge pipe for inspection; when checking, the ash hopper gate is closed first, and then the screening piece is removed, and after taking out foreign matter such as anti-wear tiles and pipe clamps, the screening piece is installed again, the ash hopper discharge is restored, and the equipment operates normally.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] A screening grid is formed by the first edge baffle, the second edge baffle and the center baffle to block larger foreign objects such as anti-wear tiles in the upstream pipeline, which can identify the blockage point of the foreign objects and reduce the difficulty of troubleshooting. The reciprocating movement of the first edge baffle and the second edge baffle increases the flow frequency of the slurry in the pipeline, prevents larger foreign objects from blocking the flow of the slurry, and reduces the possibility of blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0019] Figure 1 It is a schematic diagram of foreign matter blocking of the ash discharge pipeline screening and anti-blocking device of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure of the screening component of the ash discharge pipeline screening and anti-blocking device of the present invention.

[0021] Figure 3 This is a schematic diagram of the location of the screening element of the ash discharge pipeline screening and anti-blocking device of the present invention.

[0022] Figure 4 It is a schematic diagram of the overall structure of the ash discharge pipeline screening and anti-blocking device of the present invention.

[0023] Figure 5 This is a schematic diagram of the installation of the screening component of the ash discharge pipeline screening and anti-blocking device of the present invention.

[0024] Figure 6 This is a schematic diagram of the cover plate structure of the ash discharge pipeline screening and anti-blocking device of the present invention.

[0025] Figure 7 This is a schematic diagram of the installation of the cylinder of the ash discharge pipeline screening and anti-blocking device of the present invention.

[0026] Figure 8 This is a schematic structural diagram of the first edge baffle and the second edge baffle of the ash discharge pipeline screening and anti-blocking device of the present invention.

[0027] Fig. 9 This is a schematic diagram of the structure of the central baffle of the ash discharge pipeline screening and anti-blocking device of the present invention.

[0028] Fig.10 This is a schematic diagram of the installation of the cover shell and the sealing cover of the ash discharge pipeline screening and anti-blocking device of the present invention. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Example 1

[0034] Reference Figure 1 to Figure 3 , which is the first embodiment of the present invention, provides an ash discharge pipeline screening and anti-blocking device, which includes a slag discharge pipe 100, in which an ash channel A is opened, and ash water flows along the ash channel A.

[0035] The screening elements 200 are arranged in parallel in a plurality of groups, and the plurality of groups of screening elements 200 are arranged to block the flow path of the ash water.

[0036] Reference Figure 1 to Figure 3 , at least one group of screening elements 200 is provided; the screening element 200 comprises a first edge baffle 201 , a second edge baffle 202 and a center baffle 203 , and the first edge baffle 201 and the second edge baffle 202 are arranged on both sides of the center baffle 203 .

[0037] The cover plate 300 is connected to the ends on the same side of the first edge baffle 201 , the second edge baffle 202 and the center baffle 203 .

[0038] The first edge baffle 201 and the second edge baffle 202 are both movably arranged on both sides of the central baffle 203; the displacement path of the first edge baffle 201 forms a first moving line X1, and the displacement path of the second edge baffle 202 forms a second moving line X2. The first moving line X1, the second moving line X2 and the axis X3 of the slag discharge pipe 100 are parallel to each other.

[0039] Reference Figure 2 and Figure 3The cross-sectional shapes of the first edge baffle 201, the second edge baffle 202 and the center baffle 203 may be rectangular, elliptical or diamond-shaped.

[0040] If the screening element 200 is staggered in sequence, the first edge baffle 201, the second edge baffle 202 and the center baffle 203 are on the diagonal line of the cover plate 300, and a pulp passage is formed between the first edge baffle 201 and the center baffle 203, and a pulp passage is also formed between the second edge baffle 202 and the center baffle 203.

[0041] Furthermore, the mortar containing tiles flows from the offset mortar passage to the downstream pipe, while the tiles are blocked upstream of the mortar passage flow by the first edge baffle 201 , the second edge baffle 202 and the center baffle 203 .

[0042] Furthermore, during use of the staggered slurry passages, when the primary slurry passage is blocked by tiles and cannot allow slurry to flow through, the slurry will change its flow direction and flow out of the secondary slurry passage. The staggered first edge baffle 201, the second edge baffle 202 and the center baffle 203 can ensure the isolation of foreign objects while reducing the probability of blockage of the upstream pipeline.

[0043] If the first edge baffle 201, the second edge baffle 202 and the center baffle 203 are arranged side by side, the foreign matter can be blocked at the same position, which can reduce the possibility of the foreign matter escaping.

[0044] If the first edge baffle 201, the second edge baffle 202 and the center baffle 203 are arranged in a triangle, the center baffle 203, as the vertex of the triangle, will first come into contact with the mortar. At this time, the mortar will be split from the middle by the center baffle 203. Further, the two split mortars will flow into the lower-level pipeline from the slurry passages on both sides.

[0045] In this case, the blocked tiles and other foreign objects are located near the inner walls on both sides of the pipe, which can prevent the foreign objects from being concentrated and blocking the pipe more easily.

[0046] Furthermore, if the first edge baffle 201, the second edge baffle 202 and the center baffle 203 all adopt a rectangular plate structure, such a structure is less difficult to process and has a lower cost.

[0047] If the shape of the radial cross section is an ellipse, this shape has the characteristics of being more streamlined and will produce less resistance in the flow of the fluid, thereby reducing the difficulty of the mortar flowing.

[0048] If the shape of the radial cross section is rhombus, the tip portion can more easily flow the mortar, making it easier for foreign matter inside the mortar to be peeled off.

[0049] Example 2

[0050] Reference Figures 1 to 10 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: a displacement slide groove 301 is symmetrically opened on the top of the cover plate 300, and a mounting sleeve 302 is fixedly connected to the middle of the top of the cover plate 300.

[0051] The displacement slot 301 is preferably a strip-shaped rectangular slot, the mounting sleeve 302 is preferably columnar, and the displacement slot 301 is symmetrically arranged on both sides of the mounting sleeve 302 .

[0052] A rotation groove 302 a is provided in the middle of the installation sleeve 302 , and engaging grooves 302 a - 1 are symmetrically provided on the inner walls of both sides of the rotation groove 302 a close to the sliding groove 301 .

[0053] A sliding hole 301a is provided at the bottom of the displacement slide groove 301, and an embedded groove 301b is provided on the side wall of the displacement slide groove 301 close to the rotation groove 302a. The embedded groove 301b is connected with the rotation groove 302a through the engaging groove 302a-1.

[0054] A cylinder 303 is installed in the displacement slot 301 , a mounting plate 303 a is fixed to one side of the cylinder 303 , and the mounting plate 303 a is fixed to the top end surface of the cover plate 300 ; a piston rod 303 b of the cylinder 303 can move axially along the displacement slot 301 .

[0055] The cylinder 303 may preferably also be a multi-position cylinder, a tandem cylinder or a hydraulic cylinder. The present embodiment adopts a multi-stage cylinder. In this case, the piston rod 303b can be pushed forward layer by layer to push the object to move a long distance.

[0056] The first edge baffle 201 includes a sliding block 201a and a blocking plate 201b fixed at its bottom end. A side wall of the sliding block 201a adjacent to the blocking plate 201b is fixedly connected to a docking plate 201c. A side of the docking plate 201c away from the sliding block 201a is provided with a plurality of groups of latch teeth 201c-1.

[0057] A flow hole 201b-1 is provided in the blocking plate 201b, and the sliding block 201a can slide in the displacement slide groove 301 and is fixedly connected to the end of the piston rod 303b.

[0058] The blocking plate 201b can slide in the sliding hole 301a, and the docking plate 201c can slide in the embedded groove 301b.

[0059] During use, the piston rod 303b pushes the sliding block 201a forward, and the sliding block 201a drives the blocking plate 201b to move. At this time, the blocking plate 201b stirs the slurry axially back and forth in the ash channel A.

[0060] Furthermore, the flow hole 201b-1 allows the slurry to flow through, ensuring that the slurry can flow more easily to the downstream pipeline while blocking foreign matter.

[0061] The structure of the second edge baffle 202 is the same as that of the first edge baffle 201 , and the second edge baffle 202 is centrally symmetrically disposed in the displacement slot 301 on the other side.

[0062] The center stopper 203 includes a rotating sleeve 203a and a bearing column 203b and a stirring column 203c fixedly connected to the top and bottom ends thereof. The outer rotating sleeve of the bearing column 203b is connected to a bearing 203b-1, and a plurality of groups of tooth blocks 203a-1 are fixedly arranged at equal intervals on the circumferential outer wall of the rotating sleeve 203a.

[0063] The rotating sleeve 203a can be rotatably placed in the rotating groove 302a, the outer wall of the bearing 203b-1 is fixed to the inner wall of the rotating groove 302a, and the tooth block 203a-1 can pass through the engaging groove 302a-1 and engage with the engaging tooth 201c-1.

[0064] A through hole 203c-1 is provided on the stirring column 203c, and a plurality of sets of paddles 203c-2 are fixedly connected to the outer wall of the stirring column 203c. The function of the through hole 203c-1 is the same as that of the flow hole 201b-1.

[0065] A rotating hole 302a-2 is provided in the middle of the bottom of the rotating groove 302a of the mounting sleeve 302, and an inserting groove 302a-2a is symmetrically provided on the inner wall of the rotating hole 302a-2. The stirring column 203c and the stirring column 203c can cooperate to pass through the rotating hole 302a-2 and the inserting groove 302a-2a.

[0066] During use, the two groups of cylinders 303 are activated, and the piston rod 303 b pushes the first edge baffle 201 and the second edge baffle 202 to move on both sides of the central baffle 203 .

[0067] During the movement, the docking plate 201c drives the rotating sleeve 203a to rotate in the rotating groove 302a through the engagement of the tooth block 203a-1 and the latch tooth 201c-1. At the same time, the stirring column 203c rotates synchronously, and the paddle 203c-2 stirs the slurry in the ash channel A.

[0068] In this process, the stirring column 203c cooperates with the baffle plates 201b on both sides to stir the slurry, and during the movement, it can also ensure that foreign matter can be blocked upstream of the pipeline at all times.

[0069] A top cover 302a - 3 is also sealed and fixed on the top of the installation sleeve 302 ; a cover shell 304 and a sealing cover 305 are detachably fixed on the top of the cover plate 300 in sequence, and a handle 305a is also fixed on the top of the sealing cover 305 .

[0070] The top of the slag discharge pipe 100 is connected and fixed with an external connection box 101 , and the cover plate 300 is detachably and sealedly fixed on the top of the external connection box 101 .

[0071] During use, the cover shell 304 and the sealing cover 305 seal the upper opening of the cover plate 300 to isolate the external connection box 101 from the external environment, thereby preventing the slurry from escaping from the pipeline during use.

[0072] The remaining structures are the same as those of Example 1.

[0073] Example 3

[0074] Reference Figures 1 to 10 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that it provides a method for screening and preventing blockage in an ash discharge pipeline. The method is based on the above-mentioned ash discharge pipeline screening and preventing blockage device and includes the following steps:

[0075] First, the two ends of the slag discharge pipe 100 are connected and fixed to the ash hopper and the slurry pool; at the same time, the screening piece 200 is installed on the slag discharge pipe 100, and the first edge baffle 201, the second edge baffle 202 and the center baffle 203 extend into the ash channel A.

[0076] The cover plate 300 is connected to the external box 101 by bolts. After the cover plate 300 is fixed, the filter element 200, the cover shell 304 and the sealing cover 305 are further installed.

[0077] Then, the ash hopper gate is opened, and the slurry flows from the ash hopper into the slag discharge pipe 100 . When flowing through the screening element 200 , foreign matters with larger volume, such as anti-wear tiles and pipe clamps, are blocked by the screening element 200 .

[0078] At the same time, the blockage of foreign matter caused abnormal pressure inside the pipeline, and the pressure monitoring device sounded an alarm, and the staff went to the slag discharge pipe 100 for inspection.

[0079] Among them, the pressure monitoring device is monitored in real time by the staff, and when the pressure in the pipeline is abnormal, the staff can discover it at the first time.

[0080] When checking, first close the ash hopper gate, then remove the screening element 200, take out foreign objects such as anti-wear tiles and pipe clamps, reinstall the screening element 200, restore the ash hopper discharge, and the equipment operates normally.

[0081] In the process of intercepting foreign objects, the staff can remotely control the cylinder 303 to change the positions of the first edge baffle 201 and the second edge baffle 202 on both sides, preferably, the positions of the first edge baffle 201 and the second edge baffle 202 can be changed every hour.

[0082] Reference Figure 3The initial positions of the first edge baffle 201, the second edge baffle 202 and the center baffle 203 can be the diagonal connection position of the cover plate 300. After running in this state for one hour, it is switched to the first edge baffle 201, the second edge baffle 202 and the center baffle 203 are aligned. After running for one hour, it is switched to a triangular state again. After running for another hour, it is switched back to the original state.

[0083] During this process, the first edge baffle 201 and the second edge baffle 202 can clean a small amount of mortar that may be accumulated on the inner walls of both sides of the pipeline, drive it to move, and then flow to the downstream pipeline together with the flowing mortar.

[0084] Furthermore, the first edge baffle 201, the second edge baffle 202 and the center baffle 203 are always combined to form a filtering structure, and no matter how the mode is switched, it is always possible to ensure that foreign matter is blocked upstream.

[0085] When the pressure abnormality alarm is sounded, the staff can quickly locate the blockage position at the external box 101 and then remove the foreign matter.

[0086] The remaining structure is the same as that of Example 2.

[0087] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for screening and preventing clogging of ash discharge pipeline, characterized in that: include, A slag discharge pipe (100), wherein an ash channel (A) is provided in the slag discharge pipe (100), and ash water flows along the ash channel (A); The screening elements (200) are arranged in parallel in a plurality of groups, and the plurality of groups of the screening elements (200) are arranged to block the flow path of the ash water.

2. The ash discharge pipeline screening and anti-blocking device according to claim 1 is characterized in that: The screening element (200) is provided with at least one group; The screening element (200) comprises a first edge baffle (201), a second edge baffle (202) and a central baffle (203), wherein the first edge baffle (201) and the second edge baffle (202) are arranged on both sides of the central baffle (203); The first edge baffle (201), the second edge baffle (202) and the center baffle (203) are connected to the same-side ends thereof with a cover plate (300).

3. The ash discharge pipeline screening and anti-blocking device according to claim 2 is characterized in that: The first edge baffle (201) and the second edge baffle (202) are both movably arranged on both sides of the central baffle (203); The displacement path of the first edge baffle (201) forms a first moving line (X1), the displacement path of the second edge baffle (202) forms a second moving line (X2), and the first moving line (X1), the second moving line (X2) and the axis (X3) of the slag discharge pipe (100) are parallel to each other.

4. The ash discharge pipeline screening and anti-blocking device according to claim 2 or 3 is characterized in that: The top of the cover plate (300) is symmetrically provided with displacement slide grooves (301), and the middle part of the top of the cover plate (300) is also fixedly connected with a mounting sleeve (302); A rotation groove (302a) is provided in the middle of the installation sleeve (302), and engaging grooves (302a-1) are symmetrically provided on the inner walls of both sides of the rotation groove (302a) close to the sliding groove (301).

5. The ash discharge pipeline screening and anti-blocking device according to claim 4 is characterized in that: The displacement slide groove (301) has a slide hole (301a) at its bottom, and an embedded groove (301b) is provided on a side wall of the displacement slide groove (301) close to the rotation groove (302a). The embedded groove (301b) is connected to the rotation groove (302a) via a snap-fit ​​groove (302a-1).

6. The ash discharge pipeline screening and anti-blocking device according to claim 5 is characterized in that: A cylinder (303) is installed in the displacement slide groove (301), a mounting plate (303a) is fixed on one side of the cylinder (303), and the mounting plate (303a) is fixed to the top end surface of the cover plate (300); The piston rod (303b) of the cylinder (303) is capable of axially moving along the displacement slot (301).

7. The ash discharge pipeline screening and anti-blocking device according to claim 6 is characterized by: The first edge baffle (201) comprises a sliding block (201a) and a blocking plate (201b) fixed at the bottom end thereof, a side wall of the sliding block (201a) adjacent to the blocking plate (201b) is also fixedly connected to a docking plate (201c), and a side of the docking plate (201c) away from the sliding block (201a) is provided with a plurality of groups of latching teeth (201c-1); The blocking plate (201b) is provided with a flow hole (201b-1), and the sliding block (201a) can slide in the displacement slot (301) and is fixedly connected to the end of the piston rod (303b); The blocking plate (201b) can slide in the sliding hole (301a), and the docking plate (201c) can slide in the embedded groove (301b); The structure of the second edge baffle (202) is the same as that of the first edge baffle (201), and the second edge baffle (202) is centrally symmetrically arranged in the displacement slide groove (301) on the other side.

8. The ash discharge pipeline screening and anti-blocking device according to claim 7 is characterized in that: The central stopper (203) comprises a rotating sleeve (203a) and a bearing column (203b) and a stirring column (203c) fixedly connected at the top and bottom ends thereof, the bearing column (203b) is rotatably sleeved with a bearing (203b-1) outside, and a plurality of groups of tooth blocks (203a-1) are equidistantly fixed on the circumferential outer wall of the rotating sleeve (203a); The rotating sleeve (203a) can be placed in the rotating groove (302a) for rotation, the outer wall of the bearing (203b-1) is fixed to the inner wall of the rotating groove (302a), and the tooth block (203a-1) can pass through the engaging groove (302a-1) and mesh with the engaging teeth (201c-1); The stirring column (203c) is provided with a through hole (203c-1), and the outer wall of the stirring column (203c) is also fixedly connected to a plurality of groups of dial plates (203c-2).

9. The ash discharge pipeline screening and anti-blocking device according to claim 8 is characterized in that: A rotation hole (302a-2) is provided in the middle of the bottom of the rotation groove (302a) of the installation sleeve (302), and an insertion groove (302a-2a) is symmetrically provided on the inner wall of the rotation hole (302a-2), and the stirring column (203c) and the stirring column (203c) can cooperate to pass through the rotation hole (302a-2) and the insertion groove (302a-2a); A top cover (302a-3) is also sealed and fixed on the top of the installation sleeve (302); The top of the cover plate (300) is detachably fixed with a cover shell (304) and a sealing cover (305) in sequence, and the top of the sealing cover (305) is also fixed with a handle (305a); The top of the slag discharge pipe (100) is connected and fixed with an external connection box (101), and the cover plate (300) is detachably and sealingly fixed on the top of the external connection box (101).

10. A method for screening and preventing blockage of ash discharge pipeline, characterized in that: Based on the ash discharge pipeline screening and anti-blocking device as described in any one of claims 2 to 9, include, First, the two ends of the slag discharge pipe (100) are connected and fixed to the ash hopper and the slurry pool; at the same time, the screening member (200) is installed on the slag discharge pipe (100), and the first edge baffle (201), the second edge baffle (202) and the center baffle (203) extend into the slag channel (A); Then, the ash hopper gate is opened, and the slurry flows from the ash hopper into the slag discharge pipe (100). When the slurry flows through the screening element (200), foreign objects such as large anti-wear tiles and pipe clamps are blocked by the screening element (200); At the same time, the foreign matter blocking the pipeline causes abnormal pressure inside the pipeline, and the pressure monitoring device alarms, and the staff goes to the slag discharge pipe (100) for inspection; During the inspection, the ash hopper gate is first closed, and then the screening element (200) is disassembled, and foreign objects such as anti-wear tiles and pipe clamps are removed, and then the screening element (200) is installed again, and the ash hopper discharge is restored, and the equipment operates normally.

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