Kitchen slurry graded sand removal system and control method thereof

Abstract

The application provides a kitchen slurry grading sand removal system and a control method thereof, characterized in that the system comprises a slurry deslagging bin (1) and a slurry transition bin (3) which are communicated with each other, a weir plate (2) is arranged between the slurry deslagging bin (1) and the slurry transition bin (3), slurry in the slurry deslagging bin (1) can pass through the weir plate (2) and enter the slurry transition bin (3), an outlet of the slurry transition bin (3) is connected with a fine sand separator (4), a solid residue outlet end of the slurry deslagging bin (1) and the fine sand separator (4) is connected with a solid residue collecting barrel (5), and a slurry outlet end of the fine sand separator (4) is connected with the slurry transition bin (3); the problem of removing solid impurities in kitchen slurry is solved, the operation safety of pumps, pipelines and centrifuges in the kitchen treatment system is effectively ensured, the service life of the pumps, the pipelines and the centrifuges is prolonged, the stable operation of the anaerobic tank area is ensured, and energy saving and efficiency increasing are effectively realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen slurry dreg removal processing, and particularly relates to a kitchen slurry graded sand removal system and a control method thereof. BACKGROUND

[0002] The composition of kitchen garbage and kitchen waste in China is relatively complex. The impurity content in kitchen garbage accounts for 10% to 15% of the kitchen processing amount, and the impurity content in kitchen waste accounts for 20% to 30%. The main components of the impurities in kitchen garbage and kitchen waste are light impurities (paper, plastic, textile, wood and bamboo, etc.) and heavy impurities (bricks, ceramics, glass, metal, shell, etc.). The proportion of heavy impurities accounts for about 1% to 5% of the processing amount. The heavy impurities are difficult to remove after being crushed and slurried in the pretreatment process. If not removed, the heavy impurities will cause wear and tear to the subsequent equipment such as pumps, centrifuges and pipelines after pretreatment, and will affect the effective volume and stirring effect of the anaerobic tank, thereby greatly affecting the safe and stable operation of production. Therefore, the sand removal equipment plays a crucial role in the pretreatment process. Meanwhile, the recovery of slurry and the separation of solid dregs are often carried out simultaneously in the sand removal process, which easily leads to the presence of solid dregs in the recovered slurry and the waste of slurry with solid dregs. In addition, the existing sand removal equipment has a complex parameter adjustment process according to different sand removal needs, and the equipment is easily damaged during the switching adjustment process.

[0003] Therefore, it is urgent to provide a kitchen slurry graded sand removal system and a control method thereof to solve the defects and deficiencies in the prior art. SUMMARY

[0004] To solve the defects and deficiencies in the prior art, the present application provides a kitchen slurry graded sand removal system and a control method thereof.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A kitchen slurry graded sand removal system, characterized in that the system comprises a slurry dreg removal bin and a slurry transition bin which are in communication with each other, a weir plate is arranged between the slurry dreg removal bin and the slurry transition bin, the slurry in the slurry dreg removal bin can enter the inside of the slurry transition bin over the weir plate, the outlet of the slurry transition bin is connected with a fine sand separator, the solid dreg outlet end of the slurry dreg removal bin and the fine sand separator is connected with a solid dreg collection barrel, and the slurry outlet end of the fine sand separator is connected with the slurry transition bin.

[0007] As a further preferred embodiment of the present application, the slurry dreg removal bin comprises a dreg removal bin body, a slurry feeding port is formed in the top of the dreg removal bin body, and a dreg removal machine is arranged at the bottom of the dreg removal bin body, and the solid dreg outlet of the dreg removal machine is communicated with the solid dreg collection barrel.

[0008] As a further preferred embodiment of the present application, the weir plate is connected with the control platform, and the weir plate can be lifted and lowered under the control of the control platform.

[0009] As a further preferred embodiment of the present application, the slurry transition bin comprises a transition bin body, a bottom solid residue discharge port of the transition bin body is communicated with the fine sand separator through a gate valve and a circulating pump, a slurry discharge port is arranged on one side of the transition bin body, and a good slurry backflow port is arranged on the top of the transition bin body.

[0010] As a further preferred embodiment of the present application, the fine sand separator comprises a separation shell, a separation assembly is arranged at the inner top end of the separation shell, a sand guide groove is arranged at the inner bottom end of the separation shell and communicated with a deslagging machine, and a separation inlet and a good slurry discharge port are further arranged at the top end of the separation assembly, respectively, wherein the separation inlet is connected with the circulating pump, and the good slurry discharge port is connected with the good slurry backflow port.

[0011] As a further preferred embodiment of the present application, the fine sand separator further comprises a deslagging switch and a backflow switch arranged in the interior thereof and connected with the control platform.

[0012] As a further preferred embodiment of the present application, when the slurry in the separation assembly exceeds a preset liquid level, the control platform controls the backflow switch to be opened and the deslagging switch to be closed.

[0013] When the solid residue in the separation assembly exceeds a preset liquid level, the control platform controls the backflow switch to be closed and the deslagging switch to be opened.

[0014] As a further preferred embodiment of the present application, a solid residue sampling and detecting unit is arranged at the position of the solid residue collecting barrel, and a slurry sampling and detecting unit is arranged at the position of the slurry discharge port, and the solid residue sampling and detecting unit and the slurry sampling and detecting unit are connected with the control platform.

[0015] As a further preferred embodiment of the present application, when the detection result of the solid residue sampling and detecting unit is higher than a preset value of the solid residue, the control platform controls the weir plate to be uniformly lifted at a first lifting speed.

[0016] When the detection result of the solid residue sampling and detecting unit is lower than the preset value of the solid residue, the control platform controls the weir plate to be uniformly lowered at a first lowering speed.

[0017] When the detection result of the slurry sampling and detecting unit is higher than a preset value of the slurry, the control platform controls the weir plate to be uniformly lifted at a second lifting speed.

[0018] When the detection result of the slurry sampling and detecting unit is lower than the preset value of the slurry, the control platform controls the weir plate to be uniformly lowered at a second lowering speed.

[0019] The first rising speed is greater than the second rising speed, and the first falling speed is less than the second falling speed.

[0020] Further, the application also provides a control method of the kitchen slurry grading sand removal system, characterized by comprising the following steps:

[0021] 1) feeding the kitchen slurry after source pretreatment into the slurry deslagging bin through the slurry feeding port;

[0022] 2) realizing primary gravity sand removal of the solid residue with large particle size in the kitchen slurry in the slurry deslagging bin;

[0023] 3) discharging the large-particle-size solid residue after primary gravity sedimentation through the deslagging machine at the bottom of the slurry deslagging bin, and discharging the slurry at the top through the weir overflow into the slurry transition bin;

[0024] 4) feeding the slurry overflowed into the slurry transition bin to the fine sand separator through the slurry circulating pump at the bottom of the slurry transition bin to realize secondary cyclone sand removal;

[0025] 5) separating the fine sand in the kitchen slurry through the centrifugal force in the fine sand separator;

[0026] 6) discharging the fine sand after water washing in the separation shell through the sand guide groove into the deslagging machine, and discharging the remaining slurry through the good slurry backflow port back to the slurry transition bin;

[0027] 7) feeding the kitchen slurry meeting the sand removal requirement to the subsequent process.

[0028] Compared with the prior art, the application has the following beneficial effects:

[0029] 1) The application provides a kitchen slurry grading sand removal system and a control method thereof, solves the problem of removing solid impurities in the kitchen slurry, effectively ensures the safe operation of the pump, pipeline and centrifuge in the kitchen treatment system, prolongs the service life of the pump, pipeline and centrifuge, and ensures the stable operation of the anaerobic tank area, thereby effectively achieving energy saving and efficiency increase.

[0030] 2) The application provides a kitchen slurry grading sand removal system and a control method thereof, which is specifically provided that when the slurry in the separation assembly exceeds the preset liquid level, the control platform controls the backflow switch to open and the deslagging switch to close; and when the solid residue in the separation assembly exceeds the preset liquid level, the control platform controls the backflow switch to close and the deslagging switch to open, so that the recovery of the slurry and the separation process of the solid residue are staggered, thereby avoiding the problems of waste of the slurry and incomplete removal of the solid residue caused by mutual influence.

[0031] 3) The application provides a kitchen slurry grading sand removal system and a control method thereof, which can realize corresponding control of the lifting and lifting speed of the weir plate according to different sand removal requirements, so that the corresponding parameters of the solid residue and the slurry are adjusted only by controlling the weir plate, and the adjustment is simple and easy to realize. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0034] [First embodiment]

[0035] As Figure 1 shown is a kitchen slurry grading sand removal system provided by the first embodiment of the application, which comprises a slurry residue removal bin 1 and a slurry transition bin 3 that are in communication with each other. The slurry residue removal bin 1 is used for one-stage gravity sand removal of the slurry. The slurry transition bin 3 is used for temporarily storing the slurry after one-stage gravity sand removal. A weir plate 2 is arranged between the slurry residue removal bin 1 and the slurry transition bin 3. After one-stage gravity sand removal of the slurry in the slurry residue removal bin 1, the solid residue is left at the bottom of the slurry residue removal bin 1, and the slurry in the slurry residue removal bin 1 can enter the inside of the slurry transition bin 3 by passing over the weir plate 2. The outlet of the slurry transition bin 3 is connected to a fine sand separator 4, which is used for two-stage cyclone sand removal of the slurry. The solid residue outlet end of the slurry residue removal bin 1 and the fine sand separator 4 is connected to a solid residue collection barrel 5 for collecting the solid residue after one-stage gravity sand removal and two-stage cyclone sand removal. The slurry outlet end of the fine sand separator 4 is connected to the slurry transition bin 3 for sending the recovered slurry to the slurry transition bin 3.

[0036] As Figure 1 shown, the slurry residue removal bin 1 in the embodiment comprises a residue removal bin body 11. A slurry feeding port 12 is formed at the top of the residue removal bin body 11. The kitchen slurry after source pre-treatment is sent into the residue removal bin body 11 through the slurry feeding port 12. A residue removal machine 13 is arranged at the bottom of the residue removal bin body 11. The solid residue outlet 131 of the residue removal machine 13 is communicated with the solid residue collection barrel 5. After the solid residue is treated by the residue removal machine 13, it is collected into the solid residue collection barrel 5 through the solid residue outlet 131.

[0037] As Figure 1As shown, the weir plate 2 in the embodiment is connected with a control platform (not shown), and the weir plate 2 can be lifted under the control of the control platform; the lifting and lifting speed of the weir plate can be controlled according to different sand removal requirements, so that the corresponding parameters of the solid slag and the slurry are adjusted only by controlling the weir plate, and the adjustment is simple and easy to implement.

[0038] As shown in FIG. 1, the kitchen slurry treatment device 1 comprises a kitchen slurry feeding device 1, a weir plate 2, a slurry transition bin 3, a fine sand separator 4, a solid slag removal machine 13 and a control platform (not shown). Figure 1 The slurry transition bin 3 in the embodiment comprises a transition bin body 31, a solid slag discharge port 32 at the bottom of the transition bin body 31 is communicated with the fine sand separator 4 through a gate valve 33 and a circulating pump 34, the circulating pump 34 is used to pump the solid slag deposited at the bottom of the transition bin body 31 to the fine sand separator 4, and the gate valve 33 is used to control the opening and closing of the pumping pipeline. A slurry discharge port 35 is arranged on one side of the transition bin body 31, and the kitchen slurry meeting the sand removal requirements is sent to the subsequent process through the slurry discharge port 35. A good slurry backflow port 36 is arranged at the top of the transition bin body 31, and the slurry backflowing from the fine sand separator 4 enters the inside of the slurry transition bin 3 through the good slurry backflow port 36.

[0039] As shown in FIG. 1, the kitchen slurry treatment device 1 comprises a kitchen slurry feeding device 1, a weir plate 2, a slurry transition bin 3, a fine sand separator 4, a solid slag removal machine 13 and a control platform (not shown). Figure 1 The fine sand separator 4 in the embodiment comprises a separation shell 41, a separation assembly 43 is arranged at the inside top end of the separation shell 41, the separation assembly 43 is used to realize two-stage cyclone sand removal on the slurry entering the inside of the separation shell 41, a sand guide groove 44 is arranged at the inside bottom end of the separation shell 41, the sand guide groove 44 is communicated with the solid slag removal machine 13, the solid slag removed by the two-stage cyclone sand removal can enter the inside of the solid slag removal machine 13 through the sand guide groove 44, and the top end of the separation assembly 43 is further respectively provided with a separation inlet 42 and a good slurry discharge port 47. The separation inlet 42 is connected with the circulating pump 34 to receive the slurry pumped by the circulating pump 34, and the good slurry discharge port 47 is connected with the good slurry backflow port 36 to send the recovered slurry out to the good slurry backflow port 36.

[0040] Preferably, the inside of the fine sand separator 4 is further respectively provided with a slag discharge switch 45 and a backflow switch 46 connected with the control platform signal, the recovery of the slurry and the separation process of the solid slag are staggered through the slag discharge switch 45 and the backflow switch 46, so as to avoid the problems of waste of the slurry and incomplete removal of the solid slag caused by mutual influence.

[0041] Specifically, the kitchen slurry treatment device 1 is provided with the following control mode:

[0042] When the slurry in the separation assembly 43 exceeds the preset liquid level, the control platform controls the backflow switch 46 to be opened and the slag discharge switch 45 to be closed; at this time, the slurry needs to be recovered, so the slurry recovery is realized by opening the backflow switch 46, and the solid slag discharge is stopped by closing the slag discharge switch 45.

[0043] When the solid residue inside the separation assembly 43 exceeds the preset liquid level, the control platform controls the backflow switch 46 to be closed and the solid residue discharge switch 45 to be opened; at this time, the solid residue needs to be discharged, so the pulp liquid recovery is stopped by closing the backflow switch 46, and the solid residue discharge is realized by opening the solid residue discharge switch 45.

[0044] As a further preferred embodiment of the present embodiment, a solid residue sampling detection unit is arranged at the position of the solid residue collection barrel 5 for realizing solid residue sampling detection, and a pulp liquid sampling detection unit is arranged at the position of the pulp liquid discharge port 35 for realizing pulp liquid sampling detection, and the solid residue sampling detection unit and the pulp liquid sampling detection unit are respectively connected with the control platform signal,

[0045] As a further preferred embodiment, in the present embodiment, the solid residue preset value is set as a parameter related to the solid residue particle size, such as the maximum value or the average value of the solid residue particle size, and the pulp liquid preset value is set as a parameter related to the pulp liquid concentration, such as the maximum value or the average value of the pulp liquid concentration;

[0046] The specific control process is as follows:

[0047] When the detection result of the solid residue sampling detection unit is higher than the solid residue preset value, the control platform controls the weir plate 2 to rise at a first rising speed; at this time, the solid residue particle size in the detection result is large, which may cause damage to the subsequent equipment, and the possibility of large-particle solid residue overflowing into the pulp liquid transition bin along with the pulp liquid is further reduced by controlling the weir plate 2 to rise;

[0048] When the detection result of the solid residue sampling detection unit is lower than the solid residue preset value, the control platform controls the weir plate 2 to descend at a first descending speed; at this time, the solid residue particle size in the detection result is small, which may cause the pulp liquid concentration to be too low, and the concentration of the pulp liquid overflowing into the pulp liquid transition bin can be increased by controlling the weir plate 2 to rise;

[0049] When the detection result of the pulp liquid sampling detection unit is higher than the pulp liquid preset value, the control platform controls the weir plate 2 to rise at a second rising speed; at this time, the pulp liquid concentration in the detection result is too high, and there is a high possibility of small-particle solid residue being mixed in the pulp liquid, and the concentration of the pulp liquid overflowing into the pulp liquid transition bin can be appropriately reduced by controlling the weir plate 2 to rise;

[0050] When the detection result of the pulp liquid sampling detection unit is lower than the pulp liquid preset value, the control platform controls the weir plate 2 to descend at a second descending speed; at this time, the pulp liquid concentration in the detection result is too low, which is not conducive to the subsequent process, and thus the concentration of the pulp liquid overflowing into the pulp liquid transition bin can be appropriately increased by controlling the weir plate 2 to descend;

[0051] In the present embodiment, the following conditions are simultaneously satisfied:

[0052] The first rising speed is greater than the second rising speed. At this time, compared with the condition of too high slurry concentration caused by entrained small particle solid slag, the damage to subsequent equipment caused by large particle solid slag is greater, so it is necessary to reduce the possibility of large particle solid slag entering the slurry transition bin with the overflow slurry at a faster rising speed.

[0053] The first descending speed is less than the second descending speed. Since the influence of small particle solid slag on too low slurry concentration is low in the detection result, in order to ensure the normal operation of subsequent processes, a large descending speed is needed to realize the descent of the weir plate at this time.

[0054] [Second embodiment]

[0055] The second embodiment of the present application also provides a control method of the kitchen slurry grading sand removal system, comprising the following steps:

[0056] 1) The kitchen slurry after source pretreatment is sent into the slurry deslagging bin through the slurry inlet;

[0057] 2) The solid slag with large particle size in the kitchen slurry realizes primary gravity sand removal in the slurry deslagging bin;

[0058] 3) The large particle size solid slag after primary gravity sedimentation is discharged through the deslagging machine at the bottom of the slurry deslagging bin, and the slurry at the top is overflowed to the slurry transition bin through the weir plate;

[0059] 4) The slurry circulating pump at the bottom of the slurry transition bin transports the slurry overflowed into the slurry transition bin to the fine sand separator for secondary cyclone sand removal;

[0060] 5) The fine sand in the kitchen slurry is separated by the centrifugal force in the fine sand separator;

[0061] 6) The fine sand falls into the separation housing, is washed by water, enters the deslagging machine through the sand guide groove, and is discharged, and the remaining slurry is returned to the slurry transition bin through the good slurry return port;

[0062] 7) The kitchen slurry meeting the sand removal requirement is sent to the subsequent process.

[0063] The above only describes the preferred embodiments of the present application. It should be noted that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the technical principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A kitchen slurry classification and sand removal system, characterized by: The system comprises a slurry deslagging bin (1) and a slurry transition bin (3) which are interconnected, a weir plate (2) being provided between the slurry deslagging bin (1) and the slurry transition bin (3), slurry in the slurry deslagging bin (1) can pass over the weir plate (2) and enter the slurry transition bin (3), an outlet of the slurry transition bin (3) is connected to a fine sand separator (4), solid slag outlet ends of the slurry deslagging bin (1) and the fine sand separator (4) are connected to a solid slag collecting bucket (5), and a slurry outlet end of the fine sand separator (4) is connected to the slurry transition bin (3); The slurry deslagging bin (1) comprises a deslagging bin body (11), a slurry feed port (12) is provided at the top of the deslagging bin body (11), a deslagging machine (13) is provided at the bottom of the deslagging bin body (11), and a solid slag outlet (131) of the deslagging machine (13) is connected to a solid slag collecting bucket (5); The weir plate (2) is connected to a control platform, and the weir plate (2) can be raised and lowered under the control of the control platform; The slurry transition bin (3) includes a transition bin body (31), a solid slag discharge port (32) at the bottom of the transition bin body (31) is connected to the fine sand separator (4) through a gate valve (33) and a circulation pump (34), a slurry discharge port (35) is provided on one side of the transition bin body (31), and a good slurry return port (36) is provided on the top of the transition bin body (31); A solid slag sampling detection unit is provided at the solid slag collecting barrel (5), and a slurry sampling detection unit is provided at the slurry discharge port (35), and the solid slag sampling detection unit and the slurry sampling detection unit are respectively connected to the control platform signal; When the detection result of the solid slag sampling detection unit is higher than the solid slag preset value, the control platform controls the weir plate (2) to rise uniformly at a first rising speed; When the detection result of the solid slag sampling detection unit is lower than the solid slag preset value, the control platform controls the weir plate (2) to descend at a uniform speed at a first descending speed; When the detection result of the slurry sampling detection unit is higher than the slurry preset value, the control platform controls the weir plate (2) to rise uniformly at a second rising speed; When the detection result of the slurry sampling detection unit is lower than the slurry preset value, the control platform controls the weir plate (2) to descend at a uniform speed at a second descending speed; and the following conditions are satisfied: The first ascending speed is greater than the second ascending speed, and the first descending speed is less than the second descending speed.

2. The kitchen slurry classification and sand removal system according to claim 1, characterized in that: The fine sand separator (4) comprises a separation shell (41), a separation assembly (43) is provided at the top end of the separation shell (41), a sand guide groove (44) is provided at the bottom end of the separation shell (41), the sand guide groove (44) is connected to the slag remover (13), and a separation inlet (42) and a good slurry discharge port (47) are also provided at the top end of the separation assembly (43), the separation inlet (42) is connected to the circulation pump (34), and the good slurry discharge port (47) is connected to the good slurry return port (36).

3. The kitchen slurry classification and sand removal system according to claim 2, characterized in that: The fine sand separator (4) is further provided with a slag discharge switch (45) and a reflux switch (46) respectively connected to the control platform signal.

4. The kitchen slurry classification and sand removal system according to claim 3, characterized in that: When the slurry inside the separation component (43) exceeds a preset liquid level, the control platform controls the reflux switch (46) to open and the slag discharge switch (45) to close; When the solid slag inside the separation component (43) exceeds a preset liquid level, the control platform controls the reflux switch (46) to be closed and the slag discharge switch (45) to be opened.

5. A control method for a kitchen slurry classification and sand removal system according to any one of claims 1 to 4, characterized in that: The following steps are involved: 1) The kitchen slurry that has been pre-treated at the source is fed into the slurry removal bin through the slurry feed port; 2) Solid residue with larger particle size in the kitchen slurry is subjected to primary gravity sand removal in the slurry deslagging bin; 3) After the first-stage gravity sedimentation, the large-sized solid residue is discharged through the slurry removal tank bottom slag remover, and the top slurry overflows through the weir plate into the slurry transition tank; 4) The slurry circulation pump at the bottom of the slurry transition bin transports the slurry overflowing into the slurry transition bin to the fine sand separator for secondary cyclone sand removal; 5) The fine sand separator separates the fine sand from the kitchen slurry through centrifugal force; 6) The fine sand falls into the separation shell, is washed with water, and then enters the slag remover through the sand guide trough for slag removal and discharge, while the remaining slurry flows back to the slurry transition bin through the good slurry return port; 7) The food slurry that meets the sand removal requirements is sent to the subsequent process.

Images