CN211056939U - Unsupported flat membrane multi-section sludge concentration and digestion integrated device - Google Patents
Unsupported flat membrane multi-section sludge concentration and digestion integrated device Download PDFInfo
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- CN211056939U CN211056939U CN201921526541.2U CN201921526541U CN211056939U CN 211056939 U CN211056939 U CN 211056939U CN 201921526541 U CN201921526541 U CN 201921526541U CN 211056939 U CN211056939 U CN 211056939U
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Abstract
The utility model discloses an integrated device for multi-section sludge concentration and digestion of an unsupported flat membrane, belonging to the technical field of sludge treatment. The device comprises a screen mesh box, a sludge storage tank and a reaction tank, wherein a first submersible sewage pump is arranged in the screen mesh box and used for lifting sludge filtered by the screen mesh box into the sludge storage tank, a second submersible sewage pump is arranged in the sludge storage tank and used for lifting sludge in the sludge storage tank into the reaction tank, the reaction tank comprises a plurality of membrane tanks which are arranged in series, overflow ports with sequentially decreasing heights are respectively arranged on the side walls of the membrane tanks in the sludge flow direction, each membrane tank is internally provided with a non-support membrane component and an aeration device, the membrane flux of the non-support membrane component in each membrane tank in the sludge flow direction is sequentially decreased progressively, the non-support membrane component comprises a membrane frame and ultrafiltration membranes arranged on two sides of the membrane frame, the inner cavity of the membrane frame is communicated with a water outlet pipe, a water outlet pump is arranged on the water outlet pipe, and. The utility model discloses area is little, and the operation energy consumption is low, and it is higher and undulant less to go out mud concentration on average.
Description
Technical Field
The utility model relates to a sludge thickening digestion device, concretely relates to dull and stereotyped membrane multistage sludge thickening digestion integrated device of no support belongs to sludge treatment technical field.
Background
Along with the improvement of the social economy and urbanization level of China, the treatment capacity of urban sewage of China is increased sharply, the infrastructure of urban sewage treatment is gradually enlarged, and the treatment degree is strengthened continuously. Meanwhile, the problem of sludge treatment and disposal is still very outstanding, most of sludge treatment processes in sewage treatment plants still stay in the traditional modulation-dehydration mode, and the proportion of sewage plants for realizing sludge stabilization treatment is lower. In 2015 for 4 months, the state institute formally releases 'ten items of water' to indicate that 'the sludge generated by the water treatment facility must be subjected to stabilization, harmless and recycling treatment, and the sludge which does not reach the standard in treatment is prohibited from entering cultivated land', so how to reasonably treat a large amount of sludge becomes an environmental problem to be solved urgently.
No matter what kind of sludge is selected for treatment, the sludge needs to be subjected to reduction and stabilization treatment firstly, so that secondary pollution possibly generated in the subsequent transportation and treatment processes of the sludge is reduced, the subsequent treatment cost is reduced, and the environmental pressure is reduced. At present, the most concentration methods adopted by domestic small and medium-sized sewage treatment plants are still the traditional gravity concentration, the efficiency is lower and the sludge floating phenomenon is easy to occur. The flat membrane sludge concentration and digestion device can improve the sludge concentration efficiency through the filtering and separating effect of the flat membrane component and can avoid the sludge floating phenomenon. But the existing flat plate membrane sludge concentration and digestion device has the problems of larger occupied area, higher operation energy consumption, lower average sludge concentration, unstable effluent quality, higher membrane pollution rate, shorter operation time and the like.
SUMMERY OF THE UTILITY MODEL
To the problem among the prior art, the utility model provides a dull and stereotyped membrane multistage sludge concentration digestion integrated device of no support, the device are through arranging a plurality of membrane cisterns in series in the reactor, and the plug flow advances through the liquid level difference between the membrane cisterns, and not only the overall arrangement is compact, and area is little, and the operation energy consumption is low, can improve the average mud concentration of going out moreover greatly.
In order to realize the technical purpose, the technical proposal of the utility model is that:
a supporting-free flat membrane multi-section sludge concentration and digestion integrated device comprises a screen box, a sludge storage tank and a reaction tank, wherein a first submersible sewage pump is arranged in the screen box and used for lifting sludge filtered by the screen box into the sludge storage tank, a second submersible sewage pump is arranged in the sludge storage tank and used for lifting sludge in the sludge storage tank into the reaction tank, the reaction tank comprises a plurality of membrane tanks which are arranged in series, overflow ports with gradually decreasing heights are respectively arranged on the side walls of the membrane tanks along the flowing direction of the sludge, supporting-free membrane components and aeration devices are respectively arranged in the membrane tanks, the membrane flux of the supporting-free membrane components in the membrane tanks along the flowing direction of the sludge is gradually decreased, the supporting-free membrane components comprise membrane frames and ultrafiltration membranes arranged on the two sides of the membrane frames, the inner cavities of the membrane frames are communicated with a water outlet pipe through suction ports arranged on the membrane frames, and a water outlet pump is arranged on the water outlet pipe, the aeration device is connected with the air pump through an air inlet pipe. The utility model discloses the device is through arranging a plurality of membrane cisterns in series in the reactor, and the plug flow advances through the liquid level difference between the membrane cisterns, and not only the overall arrangement is compact, and area is little, and the operation energy consumption is low, can improve moreover and evenly go out mud concentration. Furthermore, the utility model discloses different sludge concentration fluxes have been designed to different sludge concentration, and it is undulant little to go out the mud concentration, and it is good to go out water quality of water, has ensured the long-term steady operation of reactor.
Preferably, the number of the membrane tanks is 4.
Preferably, the water outlet pipe is provided with a liquid flow meter for monitoring the water outlet flow.
Preferably, a gas flow meter for monitoring the flow rate of the intake air is arranged on the intake pipe.
As a preferred scheme, the aeration device is a microporous aerator which comprises a plug, an end cover, a connector, a supporting pipe and an aeration membrane; a first annular clamping groove is formed in the right end face of the plug, a second annular clamping groove is formed in the left end face of the end cover, and the second annular clamping groove corresponds to the first annular clamping groove in position; the aeration membrane is arranged between the plug and the end cover, the aeration membrane is cylindrical, two ends of the aeration membrane are respectively clamped with the first annular clamping groove and the second annular clamping groove, and S-shaped micropores are formed in the aeration membrane; the supporting tube is arranged in the aeration membrane, one end of the supporting tube is fixedly connected with the plug, and an air distribution layer is formed between the supporting tube and the aeration membrane; the two ends of the connector are respectively in threaded connection with the end cover and the air inlet pipe, and a check valve is arranged at the left port of the connector. The utility model discloses a design microporous aerator's structure can improve the aeration speed of aerator, reduces the drag loss, is favorable to reducing the operation energy consumption of device and the membrane pollution rate of membrane module.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of an aeration apparatus according to the present invention;
FIG. 3 is a schematic structural view of the aeration membrane of the present invention;
reference numerals:
100. the screen box 110, the first submersible sewage pump 200, the sludge storage tank 210, the second submersible sewage pump 310, the first membrane tank 311, the first overflow port 320, the second membrane tank 321, the second overflow port 330, the third membrane tank 331, the third overflow port 340, the fourth membrane tank 341, the fourth overflow port 400, the unsupported membrane component 410, the plug 411, the first annular clamping groove 420, the end cover 421, the second annular clamping groove 430, the connector 440, the aeration membrane 441, the S-shaped micropore 450, the support tube 460, the check valve 500, the aeration device 600, the water outlet pipe 610, the water outlet pump 620, the liquid flow meter 700, the air inlet pipe 710, the air pump 720, the air flow meter
Detailed Description
With reference to fig. 1 to 3, a specific embodiment of the present invention is described in detail, but the present invention is not limited to the claims.
As shown in fig. 1 to 3, an unsupported flat membrane multistage sludge concentration and digestion integrated device comprises a screen box 100, a sludge storage tank 200 and a reaction tank, wherein a first submersible sewage pump 110 is arranged in the screen box 100, the first submersible sewage pump 110 is used for lifting sludge filtered by the screen box 100 into the sludge storage tank 200, a second submersible sewage pump 210 is arranged in the sludge storage tank 200, the second submersible sewage pump 210 is used for lifting sludge in the sludge storage tank 200 into the reaction tank, the reaction tank comprises 4 membrane tanks arranged in series, wherein the membrane tanks are a first membrane tank 310, a second membrane tank 320, a third membrane tank 330 and a fourth membrane tank 340 in sequence along the direction of sludge flow, overflow ports with gradually decreasing height are respectively arranged on the side walls of the membrane tanks along the direction of sludge flow, wherein the overflow ports along the direction of sludge flow are a first overflow port 311, a second overflow port 321, a third overflow port 331 and a fourth overflow port 341 in sequence, all be equipped with unsupported membrane module 400 and aeration equipment 500 in each membrane pond, the membrane flux of unsupported membrane module 400 in each membrane pond along the mud flow direction steadilys decrease in proper order, unsupported membrane module 400 includes the membrane frame and locates the milipore filter of membrane frame both sides, the membrane frame inner chamber is linked together with outlet pipe 600 through locating the suction port on the membrane frame, be equipped with out water pump 610 and the fluidflowmeter 620 that is used for monitoring out the water flow on the outlet pipe 600, aeration equipment 500 links to each other with air pump 710 through intake pipe 700, be equipped with the gas flowmeter 720 that is used for monitoring the air inflow on the intake pipe 700. In order to increase the aeration speed of the aeration device 500 and reduce the aeration resistance loss, thereby reducing the operation energy consumption of the device and the membrane pollution rate of the membrane components, the aeration device 500 is provided with a microporous aerator, and the microporous aerator comprises a plug 410, an end cover 420, a connector 430, a support tube 450 and an aeration membrane 440; a first annular clamping groove 411 is formed in the right end face of the plug 410, a second annular clamping groove 421 is formed in the left end face of the end cover 420, and the second annular clamping groove 421 corresponds to the first annular clamping groove 411 in position; the aeration membrane 440 is arranged between the plug 410 and the end cover 420, the aeration membrane 440 is cylindrical, two ends of the aeration membrane 440 are respectively clamped with the first annular clamping groove 411 and the second annular clamping groove 421, and the aeration membrane 440 is provided with an S-shaped micropore 441; the support tube 450 is arranged in the aeration membrane 440, one end of the support tube 450 is fixedly connected with the plug 410, and an air distribution layer is formed between the support tube 450 and the aeration membrane 440; two ends of the connector 430 are respectively in threaded connection with the end cover 420 and the air inlet pipe 700, and a check valve 460 is arranged at the left port of the connector 430.
The operation principle of the unsupported flat membrane multistage sludge concentration and digestion integrated device in the embodiment is as follows:
under the action of the first submersible sewage pump 110, sludge enters the sludge storage tank 200 after being pre-screened by the screen mesh box 100, under the action of the second submersible sewage pump 210, sludge in the sludge storage tank 200 enters the first membrane tank 310 in the reactor, at the moment, the concentration of the sludge is lower, membrane components in the first membrane tank 310 adopt larger operation flux, a bottom microporous aerator aerates and simultaneously flushes the membrane components, the rapid rise of membrane pollution can be effectively prevented by combining the shaking characteristic of an unsupported flat membrane, under the suction action of the water outlet pump 610, water in the sludge is filtered and separated by the membrane components and enters the water outlet pipe 600 from an inner cavity of a membrane frame, the sludge concentrated and digested by the first membrane tank 310 flows into the second membrane tank 320 from the first overflow port 311, the sludge concentrated and digested in the same way enters the third membrane tank 330 from the second overflow port 321, and so on, the sludge overflows into the sludge dewatering machine room from the fourth flow port 341 after being concentrated and digested by the first membrane tank 310, and carrying out subsequent treatment on the sludge.
The operation principle of the microporous aerator in the embodiment is as follows:
air enters the aeration membrane 440 from the check valve and then rapidly diffuses in the air distribution layer, when the air distribution layer is filled with air, the membrane is expanded, micropores on the membrane are opened under the action of pressure, the air expands tiny bubbles into water through the micropores, and the tiny bubbles are contacted with pollutants in the water in the rising process to generate oxidation reaction, so that the complex pollutants in the water are decomposed into simple inorganic substances; after the aeration is stopped, the micropores on the membrane are quickly contracted and closed under the action of resilience force so as to prevent sewage from permeating into the aerator in a reverse flow manner, the membrane is tightly attached to the surface of the circular membrane supporting pipe, and the check valve is closed so as to prevent the sewage from flowing back into the air inlet pipe 700 and the air pump 710 through the aerator.
The aeration sludge of a small sewage treatment plant is used by the utility model, the unsupported PVDF flat membrane with the aperture range of 0.1 to 1 mu m is adopted, and the membrane area in each pool is 4.257m2The sludge inlet concentration is about 2.5-3.5 g/L, and the membrane flux of the membrane modules in the first membrane pool, the second membrane pool, the third membrane pool and the fourth membrane pool is set to be 15L/(m) in sequence2h)，10L/(m2h)，5L/(m2h) And 2L/(m)2h) The sludge concentration in the four membrane tanks is maintained at about 8 g/L, 16 g/L, 30 g/L and 46 g/L respectively after the operation is stable on the 8 th day, and the aeration rates of the four membrane tanks are 0.63m3/m2·min，0.63m3/m2·min，0.83m3/m2·min，1.04m3/m2And min, wherein within 33 days of stable operation, the membrane pressure of each reactor is respectively maintained below 8kPa, 10kPa, 34kPa and 38kPa, the COD concentration in the total effluent is maintained below 120 mg/L, the ammonia nitrogen concentration is maintained within the range of 0.1-4.5 mg/L, the total nitrogen concentration is maintained within the range of 16.3-43.6 mg/L, the total phosphorus concentration is maintained within the range of 1-5 mg/L, and the membrane effluent mixed sewage treatment plant can discharge after reaching the standard.
To sum up, the utility model has the advantages of it is following:
1. the utility model discloses four membrane cisterns are arranged through the series connection in the reactor to the device, and the plug flow advances through the liquid level difference between the membrane cisterns, and not only the overall arrangement is compact, and area is little, and the operation energy consumption is low, can improve moreover and evenly go out mud concentration.
2. Along with pushing away the going on of flowing, the mud concentration in four membrane cisternas of reactor progressively promotes, the utility model discloses to the different sludge concentration of different mud concentration design concentrated fluxes, through set up along mud flow direction membrane flux dull and stereotyped membrane module of unsupported that reduces in proper order in four membrane cisternas, but the play mud concentration fluctuation of greatly reduced reactor improves out water quality of water, ensures the long-term steady operation of reactor.
3. The utility model discloses a set up screen box 100, not only can carry out the screen in advance to impurity such as gravel in the mud, hairline and remove, prevent that impurity from blockking up stealthily dirty pump and reactor, but also can improve the stability of mud concentration, reduce the membrane pollution problem that the reactor caused because of the mud load is strikeed.
4. The utility model discloses a set up the micropore aerator in no dull and stereotyped membrane module below of support, can rely on oxygen further to digest the organic matter on the one hand, on the other hand can keep the shake of membrane module clean, effectively delays membrane pollution formation speed to avoid the short scheduling problem of traditional dull and stereotyped membrane cleaning cycle.
5. The utility model discloses a design micropore aerator's structure, aerator at the during operation, the air need not through stay tube 450 can directly get into the cloth gas layer, and is little with the tolerance, and aeration speed is fast, and resistance loss is little, is favorable to reducing the operation energy consumption of device and the membrane pollution rate of membrane module. In addition, through setting the micropore on the aeration membrane 440 to "S" shape pitch arc gas pocket, one pitch arc gas pocket breaks and can not cause aeration membrane 440 to appear whole tearing, moreover because the elastic torsion effect of rubber membrane, the micropore curved arc part of pitch arc after the pitch arc micropore is opened shows the shape that the big outer mouthful of internal orifice is little under the atmospheric pressure effect, can increase micropore aeration area increase, reduce the aeration resistance, be favorable to further reducing the operation energy consumption of device and the membrane pollution rate of membrane module.
It should be understood that the above detailed description of the present invention is only for illustrative purposes and is not limited to the technical solutions described in the embodiments of the present invention. It will be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.
Claims (5)
1. A multi-section sludge concentration and digestion integrated device of an unsupported flat membrane is characterized by comprising a screen box, a sludge storage pool and a reaction pool, wherein a first submersible sewage pump is arranged in the screen box and used for lifting sludge filtered by the screen box into the sludge storage pool, a second submersible sewage pump is arranged in the sludge storage pool and used for lifting sludge in the sludge storage pool into the reaction pool, the reaction pool comprises a plurality of membrane pools which are arranged in series, overflow ports with gradually decreasing heights are respectively arranged on the side walls of the membrane pools along the flowing direction of the sludge, unsupported membrane components and aeration devices are respectively arranged in the membrane pools, the membrane flux of the unsupported membrane components in the membrane pools along the flowing direction of the sludge is gradually decreased, the unsupported membrane components comprise a membrane frame and ultrafiltration membranes arranged on the two sides of the membrane frame, the inner cavity of the membrane frame is communicated with a water outlet pipe through a suction port arranged on the membrane frame, the water outlet pipe is provided with a water outlet pump, and the aeration device is connected with an air pump through an air inlet pipe.
2. The integrated sludge concentration and digestion apparatus according to claim 1, wherein the number of said membrane tanks is 4.
3. The integrated sludge concentration and digestion device as claimed in claim 1, wherein the outlet pipe is provided with a liquid flow meter for monitoring the flow rate of the outlet water.
4. The integrated sludge concentration and digestion device as claimed in claim 1, wherein a gas flow meter for monitoring the flow rate of the intake air is provided on the intake pipe.
5. The integrated sludge concentration and digestion device as claimed in claim 1, wherein the aeration device is a microporous aerator, the microporous aerator comprises a plug, an end cover, a connector, a support tube and an aeration membrane; a first annular clamping groove is formed in the right end face of the plug, a second annular clamping groove is formed in the left end face of the end cover, and the second annular clamping groove corresponds to the first annular clamping groove in position; the aeration membrane is arranged between the plug and the end cover, the aeration membrane is cylindrical, two ends of the aeration membrane are respectively clamped with the first annular clamping groove and the second annular clamping groove, and S-shaped micropores are formed in the aeration membrane; the supporting tube is arranged in the aeration membrane, one end of the supporting tube is fixedly connected with the plug, and an air distribution layer is formed between the supporting tube and the aeration membrane; the two ends of the connector are respectively in threaded connection with the end cover and the air inlet pipe, and a check valve is arranged at the left port of the connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921526541.2U CN211056939U (en) | 2019-09-12 | 2019-09-12 | Unsupported flat membrane multi-section sludge concentration and digestion integrated device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921526541.2U CN211056939U (en) | 2019-09-12 | 2019-09-12 | Unsupported flat membrane multi-section sludge concentration and digestion integrated device |
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| Publication Number | Publication Date |
|---|---|
| CN211056939U true CN211056939U (en) | 2020-07-21 |
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| CN201921526541.2U Active CN211056939U (en) | 2019-09-12 | 2019-09-12 | Unsupported flat membrane multi-section sludge concentration and digestion integrated device |
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