CN110778533A

CN110778533A - Anti-blocking device and method of submersible pump for leachate

Info

Publication number: CN110778533A
Application number: CN201911127932.1A
Authority: CN
Inventors: 王图强; 刘卫民; 陈晓东; 郝利炜; 刘鹏飞; 姜树丰; 黄海林; 郭建平; 李巍; 申前进; 郑云生; 王嘉麒
Original assignee: Beijing Building Materials Academy of Sciences Research
Current assignee: Beijing Building Materials Academy of Sciences Research
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-02-11

Abstract

The invention provides an anti-blocking device and an anti-blocking method of a submersible pump for leachate. The anti-blocking device of the submerged pump for leachate comprises a filter cartridge and a cleaning component; the filter cartridge is sleeved on the submersible pump and is provided with a filter hole group; the cleaning assembly is fixedly connected to the side wall of the storage pit; the cartridge filter switches between operating position and non-operating position with the immersible pump, and at non-operating position, impurity on the outer wall of clearance subassembly clearance cartridge filter. The anti-blocking device of the submerged pump for leachate can effectively prevent impurities from entering the submerged pump by arranging the filter cartridge at the outer side of the submerged pump; through the non-operating position at the immersible pump setting up cleaning device for the immersible pump is when this non-operating position, and the impurity on the filter cartridge of clearance subassembly periphery can in time clear up the immersible pump. In addition, the anti-blocking device also has the advantages of small occupied area, no need of transforming the existing equipment, convenient and fast installation and movement, no new addition of environmental pollutants and the like.

Description

Anti-blocking device and method of submersible pump for leachate

Technical Field

The invention relates to the field of garbage treatment, in particular to an anti-blocking device and an anti-blocking method of a submerged pump for leachate.

Background

At present, approximately 2 hundred million tons of domestic garbage are generated in China every year, and the garbage storage amount is up to 60 hundred million tons. The domestic garbage is generally buried, burnt and the like in a single mode. The occupied farmland of the garbage landfill reaches more than 70 ten thousand mu. Particularly, in the middle and small counties and cities of China, the vast majority of the urban cities are located at the upstream of the main rivers and near the rural areas. Because of the lack of large-scale and relatively standard household garbage disposal facilities, the places only need to adopt simple household garbage incineration or simple landfill, open-air stacking and other methods to cause secondary pollution such as odor overflow, dioxin exceeding standard, ash slag and leachate overflow and the like, thereby bringing great influence to the surrounding environment.

In the cement production process, the cement kiln can generate a large amount of high temperature, waste heat and negative pressure. The special resources create good conditions for harmless disposal of household garbage and industrial waste residues. The cement kiln is utilized to cooperatively treat the municipal domestic waste, and a co-production method is realized, so that the harmless, reduction and resource utilization of the domestic waste are realized, and a foundation is laid for ecological restoration of a refuse landfill and land resource saving. Therefore, compared with other disposal methods, the method for disposing the household garbage by using the cement kiln has the advantages of low investment, good effect, residue utilization, no secondary pollution and the like, and is a new way for solving the 'city enclosing the household garbage' problem in China.

The landfill leachate is high-concentration organic wastewater with strong odor, which is formed by water contained in garbage in a landfill, rain, snow and water entering the landfill and other water. The treatment of landfill leachate has been a very troublesome problem in the process of landfill treatment. The water quality is complex and the hazard is large. Researches show that 63 main organic pollutants in the landfill leachate are detected by analyzing the components of the organic pollutants in the landfill leachate. Wherein, the olefin hydrocarbon comprises 6 kinds, carboxylic acids 19 kinds, esters 5 kinds, alcohol and phenols 10 kinds, aldehyde and ketone 10 kinds, amides 7 kinds, aromatic hydrocarbons 1 kind, and other 5 kinds. The compound has 1 carcinogen, 4 carcinogens and auxiliary carcinogens and 1 mutagenic substance, and 6 substances listed in the blacklist of environment priority pollutants in China. If the waste water is directly discharged into the environment without being treated, serious environmental pollution is caused. For the purpose of protecting the environment, it is essential to treat the leachate.

As shown in figure 1, the existing treatment process is that the garbage enters a fully-closed garbage storage pit of a cement plant, is stacked, passes through a press machine, extrudes garbage leachate, and conveys the garbage into a cement kiln for incineration. The leachate flowing into the leachate gathering pit is pressurized by a submersible pump and then discharged for treatment.

When leachate flows into the gathering pit through the leachate discharge hole, some flocks and soft sticky matters are inevitably carried, and an inlet filter screen blocking the submersible pump is gradually blocked, so that the submersible pump cannot work. The current treatment method is to lift the submersible pump out of the pit by a walking crane and manually clean the filter screen of the submersible pump. Because the garbage and the leachate have strong stink, the whole garbage storage pit and the workshop are built in a fully-closed mode in order to prevent the stink from leaking. When equipment in a workshop breaks down and needs to be maintained, particularly in summer, the maintenance environment is hot and smelly, and great maintenance difficulty is brought to maintenance workers. Causing great harm to the physical and mental health of the patients and causing life danger in serious cases. Frequent blockage is caused, workers are very emotional to reject the blockage, but impurities such as lint and the like enter a conveying pipeline and then are blocked at a subsequent atomizing nozzle, and the atomizing nozzle is only dismantled and directly sprayed into a cement kiln, so that high-temperature equipment is damaged, and due to the fact that atomization is poor and incineration is not thorough, a part of residual pollutants which are not incinerated can be discharged to the atmosphere, and air pollution is caused.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide an anti-blocking device and an anti-blocking method for a submerged pump for leachate, and the anti-blocking device and the anti-blocking method are used for solving the problem that leachate is difficult to clean after being blocked by the submerged pump in the prior art.

(II) technical scheme

In order to solve the technical problem, the invention provides an anti-blocking device of a submersible pump for leachate, which comprises a filter cylinder and a cleaning component, wherein the filter cylinder is arranged in the filter cylinder; the filter cartridge is sleeved on the submersible pump and is provided with a filter hole group; the cleaning assembly is fixedly connected to the side wall of the storage pit; the filter cartridge with immersible pump switches between operating position and non-operating position, in non-operating position, the clearance subassembly clearance impurity on the outer wall of filter cartridge.

Further, the filter hole group comprises a first filter hole arranged on the side wall of the filter cylinder and a second filter hole arranged at the bottom of the filter cylinder.

Further, the first filter holes have a porosity in the sidewall of the filter cartridge that is greater than a porosity of the second filter holes in the bottom of the filter cartridge.

Further, the cleaning assembly comprises a fixing piece and a water spraying ring, and the water spraying ring is fixedly connected to the side wall of the storage pit through the fixing piece.

Further, the water spray ring includes an annular body and a plurality of nozzles disposed on an inner circumferential surface of the annular body.

Further, the annular body has an inner diameter greater than an outer diameter of the filter cartridge.

Further, a plurality of the nozzles are inclined downward.

Further, still include hoisting assembly, hoisting assembly includes running gear and connection rope, running gear movably connects the top of storage pit and passes through connect the rope with the cartridge filter is connected.

Further, still include control assembly, control assembly with hoist and mount subassembly and clearance subassembly communication connection.

According to another aspect of the present invention, there is also provided an anti-clogging method of a submersible pump for leachate, the anti-clogging method using the anti-clogging device according to any one of the preceding claims, the anti-clogging method comprising the steps of: the hoisting assembly is controlled by the control assembly to drive the filter cartridge to be switched from the working position to the non-working position; the control component controls the cleaning component to clean the outer wall of the filter cylinder; after the cleaning is finished, the control assembly controls the hoisting assembly to drive the filter cartridge to be switched to the working position from the non-working position.

(III) advantageous effects

According to the anti-blocking device of the submerged pump for leachate, provided by the invention, impurities can be effectively prevented from entering the submerged pump by arranging the filter cylinder on the outer side of the submerged pump; through the non-operating position at the immersible pump setting up cleaning device for the immersible pump is when this non-operating position, and the impurity on the filter cartridge of clearance subassembly periphery can in time clear up the immersible pump. In addition, the anti-blocking device can be put into use at any time according to the actual production condition; production does not need to be stopped, and normal production is not affected; the investment is small, the operation is simple and practical, the use of enterprises is greatly facilitated, and the follow-up normal production is ensured. The anti-blocking device also has the advantages of small occupied area, no need of modifying the existing equipment, convenient and fast installation and movement, no new environmental pollutants and the like.

Drawings

FIG. 1 is a schematic view of a prior art leachate submersible pump in operation;

FIG. 2 is a schematic view of a leachate submersible pump provided in an embodiment of the present invention in an operational state;

FIG. 3 is a schematic view of a leachate submersible pump provided in accordance with an embodiment of the present invention in a non-operational state;

FIG. 4 is a schematic block diagram of a cleaning assembly provided by an embodiment of the present invention;

fig. 5 is a schematic structural view of a filter cartridge provided in an embodiment of the present invention.

The reference numbers illustrate:

100. a filter cartridge; 102. a submersible pump; 104. a first filtering hole; 106. a second filtering hole; 108. a fixing member; 110. an annular body; 112. a nozzle; 114. a traveling mechanism; 116. connecting ropes; 118. a leachate pit; 120. and (7) storing the pits.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 2 to 5 in combination, the present invention provides an anti-blocking device of a submersible pump for leachate, which comprises a filter cartridge 100 and a cleaning assembly; the filter cartridge 100 is sleeved on the submersible pump 102, and a filter hole group is arranged on the filter cartridge 100; the cleaning assembly is fixedly connected to the side wall of the storage pit 120; the filter cartridge 100 and submersible pump 102 are switched between an operating position and a non-operating position in which the cleaning assembly cleans the outer walls of the filter cartridge 100 of contaminants.

According to the anti-blocking device of the submersible pump for leachate, provided by the invention, impurities can be effectively prevented from entering the submersible pump 102 by arranging the filter cartridge 100 on the outer side of the submersible pump 102; by arranging the cleaning device at the non-working position of the submersible pump 102, when the submersible pump 102 is at the non-working position, the cleaning assembly can clean impurities on the filter cartridge 100 at the periphery of the submersible pump 102 in time. In addition, the anti-blocking device can be put into use at any time according to the actual production condition; production does not need to be stopped, and normal production is not affected; the investment is small, the operation is simple and practical, the use of enterprises is greatly facilitated, and the follow-up normal production is ensured. The anti-blocking device also has the advantages of small occupied area, no need of modifying the existing equipment, convenient and fast installation and movement, no new environmental pollutants and the like.

Specifically, the anti-blocking device of the submersible pump for leachate is applied to the environment of the totally-enclosed garbage storage pit 120.

When the submersible pump 102 is to be prevented from being clogged with foreign matter in the leachate pit 118, a filter cartridge 100 is fitted on the outside of the submersible pump 102. The filter cartridge 100 may be made of a metal material such as stainless steel, etc.

The foregoing operating position refers to the position where both the filter cartridge 100 and the submersible pump 102 are in the leachate sump 118. The filter cartridge 100 in this embodiment may have a cylindrical shape or a square cylindrical shape. Set up the filtration pore group on cartridge filter 100, can filter the impurity in the leachate pit 118 effectively through set up the filtration pore group on cartridge filter 100, and then can guarantee to a certain extent that the impurity in the leachate pit 118 can not enter into immersible pump 102, guaranteed immersible pump 102's normal life and refuse treatment's efficiency.

After a period of time, the filter cartridge 100 attached with a certain amount of impurities such as lint can not normally filter the impurities any more, and then the filter cartridge 100 and the submersible pump 102 can be switched to the non-working position. The non-operating position is not particularly limited, and may be any position that is away from the leachate tank 118 and does not affect the normal garbage disposal process. On the sidewall of the storage pit 120, a cleaning assembly for cleaning the filter cartridge 100 is fixedly connected. Thus, the cleaning assembly is disposed in a position corresponding to the non-operational position of the filter cartridge 100 and submersible pump 102. When the filter cartridge 100 and submersible pump 102 are moved to the inoperative position, the cleaning assembly cleans the outer wall of the filter cartridge 100. Through the clearance of clearance subassembly, can guarantee the cleanness of cartridge filter 100 outer wall, and then can guarantee the protective effect of cartridge filter 100 to immersible pump 102 effectively.

Wherein the filter hole group on the filter cartridge 100 includes a first filter hole 104 provided on the sidewall of the filter cartridge 100 and a second filter hole 106 provided at the bottom of the filter cartridge 100.

When the filter cartridge 100 is in the operational position, the bottom of the filter cartridge 100 may be in direct contact with the bottom of the leachate sump 118, such that leachate in the leachate sump 118 can only flow into the interior of the filter cartridge 100 through the first filter holes 104 provided in the sidewall of the filter cartridge 100. Then pumped out by a submersible pump 102 and enters a rotary kiln atomizing nozzle 112 through a pipeline to be sprayed out, and the harmless incineration treatment is carried out in a high-temperature alkaline environment.

When the filter cartridge 100 is in the inoperative position, the bottom of the filter cartridge 100 is disengaged from the bottom of the leachate pit 118, and impurities such as lint may be left along the outer wall of the filter cartridge 100 by cleaning the cleaning assembly. Accordingly, the foreign substances introduced into the filter cartridge 100 are discharged out of the filter cartridge 100 through the second filtering holes 106.

Further, to ensure further achievement of the above effects, in a preferred embodiment, the first filter holes 104 have a larger porosity in the sidewall of the filter cartridge 100 than the second filter holes 106 in the bottom of the filter cartridge 100.

In other words, the arrangement of the second filter holes 106 at the bottom of the filter cartridge 100 is more sparse than the arrangement of the first filter holes 104 on the sidewall of the filter cartridge 100. For example, the aperture diameter of the second filter holes 106 may be set to be larger than the aperture diameter of the first filter holes 104, or the pitch of the adjacent second filter holes 106 may be set to be larger than the pitch of the adjacent first filter holes 104, and the like.

In this way, since the porosity of the first filtering holes 104 is large, that is, the first filtering holes 104 on the sidewall of the filter cartridge 100 are dense, effective filtration of the leachate can be achieved, and impurities in the leachate are prevented from entering the submersible pump 102; in addition, since the porosity of the second filtering holes 106 is small, that is, the second filtering holes 106 are sparse in the bottom of the filter cartridge 100, the impurities introduced into the interior of the filter cartridge 100 can more quickly flow out of the filter cartridge 100 when the filter cartridge 100 is in the non-operating position.

In this embodiment, the cleaning assembly includes a fastener 108 and a water spray ring fixedly attached to the sidewall of the sump 120 by the fastener 108.

As shown in fig. 4, the cleaning assembly includes a fixing member 108 for fixing the water spray ring, and the fixing member 108 may be a radial arm structure fixed on the sidewall of the storage pit 120, or the like. The water spraying ring is an annular structure and can perform a water spraying function, for example, high-pressure water can be sprayed to the filter cartridge 100, so that impurities on the outer wall of the filter cartridge 100 can be washed and dropped by the high-pressure water.

In the cleaning process, when the filter cartridge 100 is located at the non-working position, the filter cartridge 100 is moved up and down, the elegant water flow in the water spray ring washes down impurities such as the catkin on the outer wall of the filter cartridge 100, water and the impurities such as the catkin fall on the garbage together, in the garbage heap infiltration process, the catkin is adsorbed on the garbage, the clear water and other leachate are mixed and gradually infiltrated downwards, and the mixture passes through the leachate discharge hole and finally flows into the leachate pit 118.

With continued reference to fig. 4, the water spray ring includes an annular body 110 and a plurality of nozzles 112 disposed on an inner circumferential surface of the annular body 110.

The annular body 110 may be made of a circular steel pipe, and a plurality of nozzles 112 are installed inside the circular pipe and facing the center of the circle to form a circular high-speed strong water jet. The water flow switch for spraying is controlled by a remote-controlled electronic gate valve to complete on-off.

Preferably, the plurality of nozzles 112 are equally spaced and are distributed in layers on the inner side of the annular body 110 of the water spray ring.

Of course, the annular body 110 may be made of other materials, such as a steel plate bent and welded. That is, the cross section of the annular body 110 in the present embodiment may be any shape such as a circle, a square, or the like.

Further, the inner diameter of the annular body 110 is greater than the outer diameter of the filter cartridge 100; the annular body 110 in this embodiment has an inner diameter larger than the outer diameter of the filter cartridge 100 for the purpose of allowing the water spray ring to be sleeved outside the filter cartridge 100. Thus, the filter cartridge 100 can freely move up and down inside the water spray ring.

Still further, the plurality of nozzles 112 are inclined downward. The purpose that sets up like this can drop the smooth dashing of impurity of cartridge filter 100 outer wall through slant decurrent high-pressure rivers, makes it drop to rubbish on, has guaranteed the cleaning effect of water spray ring to cartridge filter 100.

Of course, in other embodiments, a jet ring or the like may be used for cleaning purposes. In such an embodiment, the air injection ring may be disposed inside the filter cartridge 100, and the cleaning of the filter cartridge 100 is performed by injecting air from the inside to the outside of the filter cartridge 100.

Further, in the preferred embodiment, the filter cartridge further comprises a hoisting assembly, the hoisting assembly comprises a walking mechanism 114 and a connecting rope 116, the walking mechanism 114 is movably connected to the top of the storage pit 120 and is connected with the filter cartridge 100 through the connecting rope 116.

The traveling mechanism 114 may be a mechanism capable of moving and hoisting, such as an overhead traveling crane, and the connection rope 116 may be a wire rope. One end of the connecting rope 116 is connected to the crown block, and the other end of the connecting rope 116 is connected to the filter cartridge 100. Thus, lowering and lifting of the filter cartridge 100 can be achieved when the connecting string 116 is extended or shortened. When the crown block moves, and the action of the connecting rope 116 is matched, the filter cartridge 100 can be driven to switch between the working position and the non-working position. In addition, the power supply line for the submersible pump 102 may be wound on the connection cord 116.

As before, in order to realize this immersible pump for leachate's automation of preventing stifled device and control, immersible pump for leachate's in this embodiment prevents stifled device still includes control assembly, control assembly and hoist and mount subassembly and clearance subassembly communication connection.

The current workshop is closed and isolated from the outside, and the production and action operations in the workshop are finished by operators in a control room through glass. The control room is located the workshop eminence, can overlook all the circumstances in the storage pit 120, and the leachate liquid level, whether the filter cage blocks up the condition and needs the clearance to and shift to the accurate water spray ring of cartridge filter 100 and handle the clearance, all can accomplish through control assembly.

This scheme adopts the scheme of installing cartridge filter 100 additional in the immersible pump 102 outside, with impurity filtering such as batting on the outer wall of cartridge filter 100, can protect the filter screen of immersible pump 102 entry effectively. When more sundries are attached to the filter cartridge 100, the leachate pit 118 is lifted out by using a crown block and transferred to a non-working position on the upper part of the garbage pile, the outside of the filter cartridge 100 is washed by the cleaning assembly, the normal use of the filter cartridge 100 is recovered, and in the process, the lint and the washing water fall into the garbage pile to be adsorbed. The normal continuous production is ensured in such a way repeatedly, the purpose of maintaining the blockage of the submersible pump 102 when no person enters a dangerous site is realized, all devices are not limited specially, the device is completely suitable for industrial production occasions, and the device is convenient to use and low in cost.

According to another aspect of the present invention, there is provided an anti-blocking method for a submersible pump 102 for leachate, the anti-blocking method using the anti-blocking device as described in any one of the above, the anti-blocking method comprising the steps of: the hoisting assembly is controlled by the control assembly to drive the filter cartridge 100 to be switched from the working position to the non-working position; the cleaning component is controlled by the control component to clean the outer wall of the filter cartridge 100; after the cleaning is completed, the control component controls the hoisting component to drive the filter cartridge 100 to be switched from the non-working position to the working position.

When the operator finds that a considerable amount of impurities have been accumulated outside the filter cartridge 100, the control assembly controls the crown block to move and the connecting rope 116 is retracted, so that the filter cartridge 100 drives the submersible pump 102 to be lifted from the leachate pit 118 and moved to the non-operating position;

after moving to the non-working position, the filter cartridge 100 is inserted into the water spray ring from the upper part of the water spray ring, and at the moment, the water spray ring is opened to clean the outer wall of the filter cartridge 100;

after cleaning is complete, the cartridge 100 is moved from the inoperative position into the leachate pit 118 by the cooperation of the crown block and the connecting rope 116. In this way, the filter cartridge 100 can be cleaned without the need of an operator, the continuous working capacity of the anti-blocking device of the submersible pump for leachate is ensured, and the treatment efficiency of the leachate is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An anti-blocking device of a submersible pump for leachate is characterized by comprising a filter cylinder (100) and a cleaning component;

the filter cartridge (100) is sleeved on the submersible pump (102), and a filter hole group is arranged on the filter cartridge (100);

the cleaning assembly is fixedly connected to the side wall of the storage pit (120);

the filter cartridge (100) is switchable with the submersible pump (102) between an operating position and a non-operating position in which the cleaning assembly cleans impurities on an outer wall of the filter cartridge (100).

2. The anti-clogging device of a submersible pump for leachate according to claim 1, characterized in that said set of filtering holes comprises a first filtering hole (104) provided on the side wall of said filtering cartridge (100) and a second filtering hole (106) provided at the bottom of said filtering cartridge (100).

3. The anti-clogging device of a submersible pump for leachate according to claim 2, characterized in that the porosity of said first filtering holes (104) on the side wall of said filtering cartridge (100) is greater than the porosity of said second filtering holes (106) on the bottom of said filtering cartridge (100).

4. The anti-clogging device of a submersible pump for leachate according to claim 1, characterized in that said cleaning assembly comprises a fixing member (108) and a water spray ring, said water spray ring being fixedly connected to the sidewall of said storage pit (120) by said fixing member (108).

5. The anti-clogging device for a submersible pump for leachate according to claim 4, characterized in that said water-spraying ring comprises an annular body (110) and a plurality of nozzles (112) arranged on the inner circumferential surface of said annular body (110).

6. The anti-clogging device of a submersible pump for leachate according to claim 5, characterized in that the inner diameter of said annular body (110) is greater than the outer diameter of said filtering cartridge (100).

7. The anti-clogging device of a submersible pump for leachate according to claim 5, characterized in that said plurality of nozzles (112) is inclined downwards.

8. The anti-clogging device of a submersible pump for leachate according to any of the claims 1 to 7, characterized by further comprising a hoisting assembly, wherein the hoisting assembly comprises a traveling mechanism (114) and a connecting rope (116), the traveling mechanism (114) is movably connected to the top of the storage pit (120) and connected with the filter cartridge (100) through the connecting rope (116).

9. The anti-clogging device for a submersible pump for leachate of claim 8, further comprising a control assembly in communication with the hoisting assembly and the cleaning assembly.

10. An anti-clogging method of a submersible pump for leachate, characterized in that it uses the anti-clogging device according to any one of claims 1 to 9, comprising the steps of:

the hoisting assembly is controlled by the control assembly to drive the filter cartridge (100) to be switched from the working position to the non-working position;

controlling the cleaning assembly to clean the outer wall of the filter cartridge (100) through the control assembly;

after the cleaning is finished, the control assembly controls the hoisting assembly to drive the filter cartridge (100) to be switched to the working position from the non-working position.