Gypsum filter cake flushing device

Abstract

The utility model provides a gypsum filter cake flushing device which comprises a conveyor, a first spraying assembly and a second spraying assembly, the first spraying assembly comprises a first spraying pipeline, the first spraying pipeline stretches across the conveyor in the water conveying direction, and a plurality of first spraying holes are formed in the lower end of the first spraying pipeline at intervals in the water conveying direction; the second spraying assembly comprises a second spraying pipeline, the second spraying pipeline stretches across the upper portion of the conveyor in the water conveying direction, the second spraying pipeline and the first spraying pipeline are arranged in a spaced mode in the conveying direction of the conveyor, and a plurality of second spraying holes are formed in the lower end of the second spraying pipeline in the water conveying direction at intervals; wherein the multiple first spraying holes and the multiple second spraying holes are formed in a staggered mode in the water conveying direction, and at least partial areas of projections, on the vertical plane in the conveying direction of the conveyor, of the spraying ranges of the adjacent first spraying heads and second spraying heads are arranged in an overlapped mode. The spray dechlorination device aims at improving the spray dechlorination effect on the gypsum filter cake.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization and dehydration treatment systems, in particular to a gypsum filter cake washing device. Background Art

[0002] In the limestone-gypsum wet flue gas desulfurization technology, the gypsum slurry is dehydrated by the vacuum suction of the vacuum belt dehydrator to produce a by-product gypsum filter cake. The gypsum filter cake contains a large amount of chloride ions. If the chloride ion concentration is not reduced, it cannot meet the quality requirements of the raw material gypsum of gypsum board factories, cement factories and other enterprises, and becomes solid waste, causing secondary pollution.

[0003] The gypsum filter cake flushing water device is an auxiliary equipment of the vacuum belt dehydrator. Its function is to reduce the chloride ion content of the gypsum filter cake by flushing it after dehydration.

[0004] However, the existing nozzles for flushing gypsum filter cakes cannot evenly distribute the flushing water and cannot achieve all-round flushing of the gypsum filter cakes, which leads to blind spots in the flushing of the gypsum filter cakes, resulting in excessive or insufficient local flushing water, and ultimately different chloride ion concentrations in the same batch of gypsum filter cakes, affecting the overall comprehensive utilization value of the gypsum. Utility Model Content

[0005] The main purpose of the utility model is to provide a gypsum filter cake flushing device, aiming at improving the spraying and dechlorination effect on the gypsum filter cake.

[0006] In order to achieve the above-mentioned purpose, the utility model proposes a gypsum filter cake washing device, comprising:

[0007] Conveyors for conveying gypsum filter cake; and

[0008] a first spray assembly, the first spray assembly comprising a first spray pipe and a plurality of first spray heads, the first spray pipe spanning above the conveyor along a water conveying direction, a plurality of first spray holes spaced apart at a lower end of the first spray pipe along the water conveying direction, a plurality of the first spray heads connected to the first spray pipe and correspondingly connected to one of the first spray holes; and

[0009] A second spray assembly, the second spray assembly comprising a second spray pipe and a plurality of second spray heads, the second spray pipe spanning above the conveyor along the water delivery direction and spaced apart from the first spray pipe along the delivery direction of the conveyor, a plurality of second spray holes spaced apart along the water delivery direction at the lower end of the second spray pipe, a plurality of the second spray heads being connected to the second spray pipe and correspondingly connected to one of the second spray holes;

[0010] Among them, the water delivery direction is perpendicular to the delivery direction of the conveyor, a plurality of the first spray holes and a plurality of the second spray holes are staggered in the water delivery direction, and the spray ranges of adjacent first spray heads and second spray heads are projected on a vertical plane along the delivery direction of the conveyor at least partially overlapping.

[0011] Optionally, the first spray head and / or the second spray head includes a joint portion and a nozzle portion, one end of the joint portion is connected to the first spray hole or the second spray hole, and the other end of the joint portion is connected to the nozzle portion, the nozzle portion is flat as a whole, and the size of the cross-section of the nozzle portion gradually increases in the direction away from the joint portion.

[0012] Optionally, at least two independent flow channels are formed inside the nozzle portion; the flow channels are radially arranged in a direction away from the joint portion.

[0013] Optionally, a guide fence is provided on the inner side wall of the nozzle portion; the guide fence divides the interior of the nozzle portion into a corresponding number of the flow channels.

[0014] Optionally, the side wall of the guide grid is an arc surface.

[0015] Optionally, the first shower head and / or the second shower head comprises:

[0016] A spray head, wherein a first end of the spray head is connected to the first spray hole or the second spray hole;

[0017] A connecting pipe, the connecting pipe is rotatably plugged into the second end of the spray head, and the interior of the connecting pipe is connected to the interior of the spray head; and

[0018] Two water spray arms, the two water spray arms are symmetrically connected to the connecting pipe with the connecting pipe as the central axis, the interior of the water spray arm is connected with the interior of the connecting pipe, the outer wall of the water spray arm is provided with a plurality of water spray holes connected to the interior of the water spray arm, the water spray ports of the plurality of water spray holes are inclined relative to the outer wall of the water spray arm, the inclination angles of the plurality of water spray holes gradually increase along the extension direction of the water spray arm, and each water spray hole sprays water inclined toward the outside of the water spray arm.

[0019] Optionally, a reverse-thrust spray hole is further provided at one end of the water spray arm away from the connecting pipe, and the reverse-thrust spray hole is used to spray water in the tangential direction of the rotation of the water spray arm.

[0020] Optionally, the connecting pipe and the water spray arm are integrally formed.

[0021] Optionally, the gypsum filter cake flushing device includes a plurality of the first spray assemblies and a plurality of the second spray assemblies, and the plurality of the first spray assemblies and the plurality of the second spray assemblies are alternately and spacedly distributed along the conveying direction of the conveyor.

[0022] Optionally, the gypsum filter cake flushing device further includes a water pipe and a water pump connected to the water pipe, the water pipe is connected to each of the first spray pipes and each of the second spray pipes, and the water pump is used to supply water to the water pipe.

[0023] The gypsum filter cake flushing device provided by the utility model staggers the first spray holes and the second spray holes on the first spray pipe and the second spray pipe, so that the flushing range of the flushing water can be increased, ensuring that the gypsum filter cake on the entire conveyor can be flushed, and the spray blind area is eliminated as much as possible; and the spray ranges of the adjacent first spray heads and the second spray heads are overlapped in at least a part of the projection on the vertical plane along the conveying direction of the conveyor, in order to further expand the spray range of each spray head, so that the gypsum filter cake on the conveyor can be flushed at least twice, further reducing the chloride ion concentration in the gypsum filter cake after flushing, and improving the spray dechlorination effect on the gypsum filter cake. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 This is a structural schematic diagram of an embodiment of a gypsum filter cake washing device of the utility model;

[0026] Figure 2 A schematic structural diagram of a first embodiment of the first spray head and / or the second spray head provided by the utility model;

[0027] Figure 3 A schematic structural diagram of a second embodiment of the first spray head and / or the second spray head provided by the utility model;

[0028] Figure 4 for Figure 3 Side view of.

[0029] Description of Figure Numbers:

[0030]

[0031]

[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0036] In the limestone-gypsum wet flue gas desulfurization technology, the gypsum slurry is dehydrated by the vacuum suction of the vacuum belt dehydrator to produce a by-product gypsum filter cake. The gypsum filter cake contains a large amount of chloride ions. If the chloride ion concentration is not reduced, it cannot meet the quality requirements of the raw material gypsum of gypsum board factories, cement factories and other enterprises, and becomes solid waste, causing secondary pollution.

[0037] The gypsum filter cake flushing water device is an auxiliary equipment of the vacuum belt dehydrator. Its function is to reduce the chloride ion content of the gypsum filter cake by flushing it after dehydration.

[0038] However, the existing nozzles for flushing gypsum filter cakes cannot evenly distribute the flushing water and cannot achieve all-round flushing of the gypsum filter cakes, which leads to blind spots in the flushing of the gypsum filter cakes, resulting in excessive or insufficient local flushing water, and ultimately different chloride ion concentrations in the same batch of gypsum filter cakes, affecting the overall comprehensive utilization value of the gypsum.

[0039] For this reason, please see Figures 1 to 4 The utility model provides a gypsum filter cake washing device 100.

[0040] See also Figure 1The utility model discloses a gypsum filter cake washing device 100, comprising a conveyor 1, a first spray assembly 2 and a second spray assembly 3, wherein the conveyor 1 is used to convey the gypsum filter cake; the first spray assembly 2 comprises a first spray pipe 21 and a plurality of first spray heads 22, the first spray pipe 21 spans over the conveyor 1 along a water conveying direction, a plurality of first spray holes are arranged at intervals along the water conveying direction at the lower end of the first spray pipe 21, a plurality of first spray heads 22 are connected to the first spray pipe 21 and are connected to a corresponding first spray hole; the second spray assembly 3 comprises a second spray pipe 31 and a plurality of second spray heads 32, the second spray The pipeline 31 spans over the conveyor 1 along the water conveying direction and is spaced apart from the first spray pipeline 21 along the conveying direction of the conveyor 1. A plurality of second spray holes are spaced apart at the lower end of the second spray pipeline 31 along the water conveying direction. A plurality of second spray heads 32 are connected to the second spray pipeline 31 and are connected to a corresponding second spray hole. The water conveying direction is perpendicular to the conveying direction of the conveyor 1. The plurality of first spray holes and the plurality of second spray holes are staggered in the water conveying direction. The projections of the spraying ranges of the adjacent first spray heads 22 and the second spray heads 32 on the vertical plane along the conveying direction of the conveyor 1 at least partially overlap.

[0041] The gypsum filter cake flushing device 100 provided by the utility model staggers the first spray holes and the second spray holes on the first spray pipe 21 and the second spray pipe 31, so that the flushing range of the flushing water can be increased, ensuring that the gypsum filter cake on the entire conveyor 1 can be flushed, and the spray blind area can be eliminated as much as possible; and the spray ranges of the adjacent first spray heads 22 and the second spray heads 32 are overlapped in at least part of the projection on the vertical plane along the conveying direction of the conveyor 1, in order to further expand the spray range of each spray head, so that the gypsum filter cake on the conveyor 1 can be flushed at least twice, further reducing the chloride ion concentration in the gypsum filter cake after flushing, and improving the spray dechlorination effect on the gypsum filter cake.

[0042] See also Figure 2In order to further improve the spraying range of the spray head, in one embodiment of the present application, the first spray head 22 and / or the second spray head 32 includes a joint part 41 and a nozzle part 42. One end of the joint part 41 is connected to the first spray hole or the second spray hole, and the other end of the joint part 41 is connected to the nozzle part 42. The nozzle part 42 is flat as a whole, and the size of the cross section of the nozzle part 42 gradually increases in the direction away from the joint part 41. When the flat-mouthed spray head is working, the liquid reaches the nozzle part 42 with a flat expansion from the spray pipe through the joint part 41. Since the size of the longitudinal section of the nozzle part 42 gradually increases in the direction away from the joint part 41, that is, gradually increases in the direction of liquid flow, when the liquid flows in the nozzle part 42, it can be relatively evenly dispersed to the entire outlet of the nozzle part 42, thereby ensuring that after the flushing water is sprayed from the nozzle part 42, the width of the spray area covered is larger, so as to further eliminate the spray blind area.

[0043] Furthermore, in one embodiment of the present application, at least two independent circulation channels 421 are formed inside the nozzle portion 42; the circulation channels 421 are radially arranged in a direction away from the joint portion 41. Since independent circulation channels 421 are arranged inside the nozzle portion 42, when liquid flows into the nozzle portion 42, the liquid is separated into different circulation channels 421, so that the flushing water can be sprayed more evenly and the width covered by the flushing water is also wider, so the flushing and dechlorination effect is better.

[0044] In order to isolate different fluid channels inside the nozzle portion 42, in one embodiment of the present application, a guide fence 43 is provided on the inner side wall of the nozzle portion 42; the guide fence 43 divides the inside of the nozzle portion 42 into a corresponding number of flow channels 421. Due to the provision of the guide fence 43, liquid can be introduced into different flow channels 421.

[0045] Considering that the liquid needs to flow stably when being ejected from the nozzle portion 42 so that the liquid ejected from the nozzle portion 42 is evenly distributed, in order to solve the above problem, in one embodiment of the present application, the side wall of the guide gate 43 is an arc surface. The arc surface side wall design can reduce the resistance loss of the liquid on the guide gate 43 and reduce energy loss. The arc surface can also help to evenly distribute the liquid, so that the liquid flows along the side wall of the guide gate 43 more evenly and stably.

[0046] See also Figure 3 and Figure 4In order to expand the spraying range of the spray head, in one embodiment of the present application, the first spray head 22 and / or the second spray head 32 include a connecting pipe 51 and two water spray arms 52, the connecting pipe 51 is rotatably inserted into the first spray hole or the second spray hole, the interior of the connecting pipe 51 is connected to the interior of the first spray pipe 21 or the second spray pipe 31; the two water spray arms are symmetrically connected to the connecting pipe 51 with the connecting pipe 51 as the central axis, the interior of the water spray arm 52 is connected to the interior of the connecting pipe 51, the outer wall of the water spray arm 52 is provided with a plurality of water spray holes 521 connected to the interior of the water spray arm 52, the water spray ports of the plurality of water spray holes 521 are inclined relative to the outer wall of the water spray arm 52, the inclination angles of the plurality of water spray holes 521 gradually increase along the extension direction of the water spray arm 52, and each water spray hole 521 sprays water obliquely toward the outer side of the water spray arm 52. The rotatable connecting pipe 51 can further expand the spraying range of the sprayed flushing water into a disc shape, and the orderly inclined water spraying structure of each water spray hole 521 can make the sprayed flushing water more uniform and increase its coverage range.

[0047] In one embodiment of the present application, a reverse thrust spray hole 522 is further provided at one end of the water spray arm 52 away from the connecting pipe 51. The reverse thrust spray hole 522 is used to spray water in the tangential direction of the rotation of the water spray arm 52. The reverse thrust spray hole 522 can effectively assist in accelerating the rotation speed of the connecting pipe 51, thereby further improving the uniformity of the spraying of the flushing liquid.

[0048] Furthermore, in one embodiment of the present application, the connecting pipe 51 is integrally formed with the water spray arm 52. The design of the connecting pipe 51 and the water spray arm 52 being integrally formed can provide better structural stability and flushing water diversion performance. By integrating the connecting pipe 51 with the water spray arm 52, the number of joints and connection points can be reduced, and the risk of leakage and damage can be reduced. This design can also improve the strength and durability of the water spray arm 52 and reduce the frequency of maintenance and replacement of parts. In addition, the integral formation of the connecting pipe 51 and the water spray arm 52 can also provide a better flushing water diversion effect. The integrated design can reduce the resistance loss of the flushing water at the connection and provide a smoother flow path. This helps to reduce the turbulence and vortex of the flushing water, improve the diversion effect, and ensure that the flushing water is evenly distributed on the water spray arm 52.

[0049] In order to increase the number of flushing times and further reduce the chloride ion concentration in the gypsum filter cake, in one embodiment of the present application, the gypsum filter cake flushing device 100 includes a plurality of first spray assemblies 2 and a plurality of second spray assemblies 3, and the plurality of first spray assemblies 2 and the plurality of second spray assemblies 3 are alternately distributed along the conveying direction of the conveyor 1.

[0050] In one embodiment of the present application, the gypsum filter cake flushing device 100 further includes a water pipe and a water pump connected to the water pipe, the water pipe is connected to each first spray pipe 21 and each second spray pipe 31, and the water pump is used to supply water to the water pipe.

[0051] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A gypsum filter cake washing device, characterized in that: include: Conveyors for conveying gypsum filter cake; and a first spray assembly, the first spray assembly comprising a first spray pipe and a plurality of first spray heads, the first spray pipe spanning above the conveyor along a water conveying direction, a plurality of first spray holes spaced apart at a lower end of the first spray pipe along the water conveying direction, a plurality of the first spray heads connected to the first spray pipe and correspondingly connected to one of the first spray holes; and A second spray assembly, the second spray assembly comprising a second spray pipe and a plurality of second spray heads, the second spray pipe spanning above the conveyor along the water delivery direction and spaced apart from the first spray pipe along the delivery direction of the conveyor, a plurality of second spray holes spaced apart along the water delivery direction at the lower end of the second spray pipe, a plurality of the second spray heads being connected to the second spray pipe and correspondingly connected to one of the second spray holes; Among them, the water delivery direction is perpendicular to the delivery direction of the conveyor, a plurality of the first spray holes and a plurality of the second spray holes are staggered in the water delivery direction, and the spray ranges of adjacent first spray heads and second spray heads are projected on a vertical plane along the delivery direction of the conveyor at least partially overlapping.

2. The gypsum filter cake washing device according to claim 1, characterized in that: The first spray head and / or the second spray head includes a joint portion and a nozzle portion, one end of the joint portion is connected to the first spray hole or the second spray hole, and the other end of the joint portion is connected to the nozzle portion, the nozzle portion is flat as a whole, and the size of the cross-section of the nozzle portion gradually increases in the direction away from the joint portion.

3. The gypsum filter cake washing device according to claim 2, characterized in that: At least two independent flow channels are formed inside the nozzle portion; the flow channels are radially arranged in a direction away from the joint portion.

4. The gypsum filter cake washing device according to claim 3, characterized in that: A guide fence is arranged on the inner side wall of the nozzle portion; the guide fence divides the interior of the nozzle portion into a corresponding number of the flow channels.

5. The gypsum filter cake washing device according to claim 4, characterized in that: The side wall of the guide grid is an arc surface.

6. The gypsum filter cake washing device according to claim 1, characterized in that: The first shower head and / or the second shower head comprises: A connecting pipe, the connecting pipe is rotatably inserted into the first spray hole or the second spray hole, and the interior of the connecting pipe is connected to the interior of the first spray pipe or the second spray pipe; and Two water spray arms, the two water spray arms are symmetrically connected to the connecting pipe with the connecting pipe as the central axis, the interior of the water spray arm is connected with the interior of the connecting pipe, the outer wall of the water spray arm is provided with a plurality of water spray holes connected to the interior of the water spray arm, the water spray ports of the plurality of water spray holes are inclined relative to the outer wall of the water spray arm, the inclination angles of the plurality of water spray holes gradually increase along the extension direction of the water spray arm, and each water spray hole sprays water inclined toward the outside of the water spray arm.

7. The gypsum filter cake washing device according to claim 6, characterized in that: A reverse-thrust spray hole is also provided at one end of the water spray arm away from the connecting pipe, and the reverse-thrust spray hole is used to spray water in the tangential direction of the rotation of the water spray arm.

8. The gypsum filter cake washing device according to claim 6, characterized in that: The connecting pipe and the water spray arm are integrally formed.

9. The gypsum filter cake washing device according to claim 1, characterized in that: The gypsum filter cake flushing device comprises a plurality of the first spray assemblies and a plurality of the second spray assemblies, and the plurality of the first spray assemblies and the plurality of the second spray assemblies are alternately and spacedly distributed along the conveying direction of the conveyor.

10. The gypsum filter cake washing device according to claim 9, characterized in that: The gypsum filter cake flushing device also includes a water pipe and a water pump connected to the water pipe, the water pipe is connected to each of the first spray pipes and each of the second spray pipes, and the water pump is used to supply water to the water pipe.

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