CN209835814U - Horizontal sedimentation tank for leachate treatment process of household garbage incineration plant - Google Patents
Horizontal sedimentation tank for leachate treatment process of household garbage incineration plant Download PDFInfo
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- CN209835814U CN209835814U CN201822261721.4U CN201822261721U CN209835814U CN 209835814 U CN209835814 U CN 209835814U CN 201822261721 U CN201822261721 U CN 201822261721U CN 209835814 U CN209835814 U CN 209835814U
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Abstract
The utility model discloses a horizontal sedimentation tank for the leachate treatment process of a domestic waste incineration plant, which is characterized in that a pre-sedimentation tank, an adjusting tank, a coagulation tank and a sedimentation tank are combined into the horizontal sedimentation tank; the horizontal flow sedimentation tank comprises a water inlet overflow weir (70) for distributing water after the water enters a No. 1 horizontal flow sedimentation tank (50) or a No. 2 horizontal flow sedimentation tank (60), and the water is precipitated in the horizontal flow sedimentation tank; the supernatant after precipitation is sent to a subsequent treatment system by a water outlet lifting pump (10); the precipitated SS is stored in a sludge storage hopper and is conveyed to a sludge treatment system through a sludge discharge pump (20); the valve (30) controls the medium flow direction, and the pipeline (40) is used for medium flow. To domestic waste incineration factory filtration liquid, the utility model discloses can not only reduce area 15%, reduce operation and maintenance work load, can also improve the operating stability, improve the treatment effect to the suspended solid.
Description
Technical Field
The utility model relates to a pretreatment portion of domestic waste incineration plant filtration liquid treatment process can be with the utility model discloses a horizontal sedimentation tank replaces preliminary sedimentation tank, equalizing basin, coagulating basin, the sedimentation tank of former technology pretreatment portion.
Background
At present, the treatment process of the percolate of a domestic garbage incineration plant is basically fixed as follows: the method comprises the steps of grid, a primary sedimentation tank, an adjusting tank, a coagulation tank (containing a dosing device), a sedimentation tank, a heating tank, an anaerobic sedimentation tank, an A/O tank, external ultrafiltration, nanofiltration and reverse osmosis. The treatment process has the problems of overlong flow, large operation management workload and large occupied area. The specific description is as follows:
the main functions of the grating, the primary sedimentation tank, the regulating tank, the coagulation tank and the sedimentation tank are to remove SS and regulate water quality and water quantity. The main function of the grating is to filter massive impurities, the main function of the primary sedimentation tank is to precipitate the easily precipitated SS, the function of the adjusting tank is to adjust the water quality and the water quantity, the coagulating basin converges the difficultly precipitated SS into the SS with larger particles through the dosing flocculation effect, and then the SS is precipitated in the sedimentation tank.
In actual operation, the sedimentation effect of the primary sedimentation tank is often poor, and the adjusting tank is large in size and long in retention time, so that the effect of the sedimentation tank is actually achieved. Meanwhile, the coagulation tank is generally not added with medicine, so that the subsequent sedimentation tank can not perform sedimentation. For adjusting water quality, the adjusting tank is often provided with a submersible mixer to homogenize the percolate. If the submersible mixer is started, the conditioning tank has no sedimentation effect, and the SS which is not fully precipitated can have negative effects on the subsequent biochemical process. If the mixer is not started, the adjusting tank can precipitate a large amount of SS, and the adjusting tank needs to be periodically emptied to clean the bottom accumulated mud due to no mud discharge setting. Not only increased the maintenance work load, there is the safety risk moreover.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a advection sedimentation tank for domestic waste incineration plant filtration liquid treatment process to simplify process flow, practice thrift and take up an area of, improve the treatment effect.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a horizontal sedimentation tank for a percolate treatment process of a domestic waste incineration plant is characterized in that a pre-sedimentation tank, a regulating tank, a coagulation tank and a sedimentation tank are combined into a horizontal sedimentation tank; the horizontal flow sedimentation tank comprises a water inlet overflow weir 70 for distributing water after the water enters a No. 1 horizontal flow sedimentation tank 50 or a No. 2 horizontal flow sedimentation tank 60, and the water is precipitated in the horizontal flow sedimentation tank; the supernatant after precipitation is sent to a subsequent treatment system by a water outlet lifting pump 10; the precipitated SS is stored in a sludge storage hopper and is conveyed to a sludge treatment system through a sludge discharge pump 20; the valve 30 controls the medium flow and the conduit 40 is used for medium flow.
Furthermore, 2-4 seats are arranged in parallel in the horizontal sedimentation tank, and a plurality of buckets are adopted to discharge mud and lift water out of the pump.
Furthermore, the horizontal flow sedimentation tank adopts intermittent operation, water is fed in sequence and discharged in sequence, and the horizontal flow sedimentation tank does not feed water and discharge water simultaneously.
The operation method of the horizontal flow sedimentation tank comprises the following steps that 1# horizontal flow sedimentation tank 50 and 2# horizontal flow sedimentation tank 60 sequentially operate:
when the No. 1 horizontal flow sedimentation tank 50 only takes in water and does not take out water, the liquid level is continuously increased, and when the No. 2 horizontal flow sedimentation tank 60 only takes out water and does not take in water, the liquid level is continuously reduced;
when the liquid level of the 2# horizontal flow sedimentation tank 60 is reduced to the minimum, the 2# horizontal flow sedimentation tank 60 only takes in water and does not take out water, and the 1# horizontal flow sedimentation tank 50 only takes out water and does not take in water;
when the liquid level of the No. 1 horizontal flow sedimentation tank 50 is reduced to the minimum, the No. 1 horizontal flow sedimentation tank 50 only takes in water and does not take out water, and the No. 2 horizontal flow sedimentation tank 60 only takes out water and does not take in water, and the circulation is carried out.
When the three horizontal sedimentation tanks are used for parallel operation, the first horizontal sedimentation tank only feeds water, the second horizontal sedimentation tank only feeds water, and the third horizontal sedimentation tank stands still and circulates in sequence.
Because the size of the adjusting tank is similar to that of the horizontal flow sedimentation tank, the improved sedimentation tank adopts the form of the horizontal flow sedimentation tank. In order to avoid the influence of water inflow impact on the sedimentation effect, the water inflow of the horizontal flow sedimentation tank adopts the form of an overflow weir. Because the horizontal flow sedimentation tank simultaneously plays a role of a regulating tank, the liquid level of the horizontal flow sedimentation tank is changed, and the common overflow water outlet mode of the common horizontal flow sedimentation tank is not applicable any more. Therefore, the horizontal flow sedimentation tank adopts a lift pump to discharge water, and the inlet of the water inlet pipe of the lift pump is slightly higher than the upper edge of the sludge storage hopper.
Because landfill leachate stoste has the foul smell, the equalizing basin needs to be airtight, if set up the mud scraper, then can only set up in the advection sedimentation tank inside. Because the raw liquor of the landfill leachate has strong corrosivity, the mud scraper is very easy to corrode, and the operation management and the maintenance are difficult. Considering the flammable and explosive gas overflowing from the raw leachate, potential safety hazards exist when the electrical equipment is operated. Therefore, the bottom of the horizontal sedimentation tank is fully distributed with the sludge storage hoppers without arranging a sludge scraper, and each sludge hopper is provided with a sludge discharge pipe.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the occupied area is reduced by about 15 percent. Taking a percolate treatment station with the treatment capacity of 600t/d designed by the original pretreatment process as an example, the occupied area of the regulating tank is 670m2The pre-settling tank and the settling tank are respectively provided with 2 seats, and the floor area of each seat is 30m2The coagulation tank is arranged on two layers, does not occupy the floor area, and the total floor area is 790m2After the horizontal sedimentation tank is adopted, the occupied area is 670m2And the floor area is reduced15％；
2. The operation and maintenance workload is reduced, and the operation stability is improved;
3. improve the precipitation effect and is beneficial to the subsequent biochemical treatment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural plane view of the horizontal sedimentation tank of the present invention;
FIG. 2 is a schematic sectional view of the horizontal sedimentation tank of the present invention taken along the line A-A;
FIG. 3 is a schematic sectional view of the horizontal sedimentation tank of the present invention taken along the line B-B;
the corresponding device names indicated by the numbers and letters in the figures:
10. the system comprises an effluent lifting pump 20, a sludge discharge pump 30, a valve 40, a pipeline 50, a No. 1 horizontal flow sedimentation tank 60, a No. 2 horizontal flow sedimentation tank 70 and an influent overflow weir.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
The utility model discloses a horizontal sedimentation tank for domestic waste burns factory filtration liquid treatment process is about to change "grid + primary sedimentation tank + equalizing basin + coagulation tank + sedimentation tank" in the former technology section into "grid + horizontal sedimentation tank". Referring to fig. 1, 2 and 3, the horizontal sedimentation tank is an improved type, and comprises that inlet water enters a No. 1 horizontal sedimentation tank 50 or a No. 2 horizontal sedimentation tank 60, and then is distributed by an inlet overflow weir 70, and is precipitated in the horizontal sedimentation tank. The supernatant after precipitation is sent to a subsequent treatment system by a water outlet lifting pump 10; the precipitated SS is stored in a sludge storage hopper and is conveyed to a sludge treatment system through a sludge discharge pump 20; the valve 30 controls the medium flow and the conduit 40 is used for medium flow.
In actual operation, the horizontal flow sedimentation tank 50 and the horizontal flow sedimentation tank 60 operate in sequence, and the typical operation mode is as follows: the horizontal sedimentation tank 50 only takes in water and does not take out water, the liquid level is continuously increased, the horizontal sedimentation tank 60 only takes out water and does not take in water, and the liquid level is continuously reduced. When the liquid level of the horizontal flow sedimentation tank 60 is reduced to the minimum, only water enters the horizontal flow sedimentation tank 60 and does not flow out, and only water exits the horizontal flow sedimentation tank 50 and does not flow in. When the liquid level of the horizontal flow sedimentation tank 50 is reduced to the minimum, the horizontal flow sedimentation tank 50 only takes in water and does not take out water, and the horizontal flow sedimentation tank 60 only takes out water and does not take in water, so that circulation is realized. The key point of the operation is to avoid the simultaneous water inlet and outlet of the same horizontal flow sedimentation tank so as to obtain the optimal sedimentation effect. If three horizontal sedimentation tanks are designed to run in parallel, one horizontal sedimentation tank only feeds water, one horizontal sedimentation tank only discharges water, and one horizontal sedimentation tank stands still and circulates in sequence.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only for illustration of the principle of the present invention, without departing from the spirit and scope of the present invention, the present invention can also have various changes and improvements, such as different forms of the mud bucket, the mud pipe, the water inlet and distribution device and the water outlet and collection device, and these changes and improvements all fall into the scope of the present invention. The utility model discloses the protection scope should include all domestic waste incineration plant filtration liquid treatment process who adopts the advection sedimentation tank to 2-4 seats are established to the advection sedimentation tank, adopt the multi-bucket mud discharging, and the elevator pump is gone out water. The intermittent operation is adopted, water is fed in and discharged out in sequence, and the same horizontal flow sedimentation tank avoids water feeding and water discharging at the same time.
The utility model discloses reform transform former equalizing basin into the sedimentation tank, play the regulating pondage simultaneously and deposit the effect of SS, will just sink pond, coagulating basin (containing charge device), sedimentation tank and omit. It should be noted that: the horizontal sedimentation tank has a weaker regulating effect on water quality than that of a regulating tank for starting a submersible mixer. However, in actual operation, the quality of the leachate stock solution is relatively stable, and the requirement on adjusting the water quality is lower.
Claims (3)
1. A horizontal sedimentation tank for a percolate treatment process of a domestic waste incineration plant is characterized in that a pre-sedimentation tank, a regulating tank, a coagulation tank and a sedimentation tank are combined into a horizontal sedimentation tank; the horizontal flow sedimentation tank comprises a water inlet overflow weir (70) for distributing water after the water enters a No. 1 horizontal flow sedimentation tank (50) or a No. 2 horizontal flow sedimentation tank (60), and the water is precipitated in the horizontal flow sedimentation tank; the supernatant after precipitation is sent to a subsequent treatment system by a water outlet lifting pump (10); the precipitated SS is stored in a sludge storage hopper and is conveyed to a sludge treatment system through a sludge discharge pump (20); the valve (30) controls the medium flow direction, and the pipeline (40) is used for medium flow.
2. The horizontal flow sedimentation tank for the leachate treatment process of the domestic waste incineration plant as claimed in claim 1, wherein 2-4 seats are arranged in parallel in the horizontal flow sedimentation tank, and a multi-bucket sludge discharge and lift pump water discharge are adopted.
3. The horizontal flow sedimentation tank for the leachate treatment process in the domestic waste incineration plant as claimed in claim 2, wherein the horizontal flow sedimentation tank operates intermittently, and water is sequentially fed and discharged, and the horizontal flow sedimentation tank does not feed and discharge water simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822261721.4U CN209835814U (en) | 2018-12-30 | 2018-12-30 | Horizontal sedimentation tank for leachate treatment process of household garbage incineration plant |
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| CN201822261721.4U CN209835814U (en) | 2018-12-30 | 2018-12-30 | Horizontal sedimentation tank for leachate treatment process of household garbage incineration plant |
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| CN209835814U true CN209835814U (en) | 2019-12-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110217868A (en) * | 2018-12-30 | 2019-09-10 | 上海康恒环境股份有限公司 | A kind of horizontal sedimentation tank for municipal solid waste incinerator percolate treating process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110217868A (en) * | 2018-12-30 | 2019-09-10 | 上海康恒环境股份有限公司 | A kind of horizontal sedimentation tank for municipal solid waste incinerator percolate treating process |
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