CN110028154B - Non-blocking water distribution anaerobic reaction device - Google Patents

Abstract

The invention discloses a non-blocking water distribution anaerobic reaction device, comprising a reactor body, a water inlet system, a gas collecting main pipe and a return pipe system. A gas-liquid separation tank is arranged at the top of the reactor body, and the reactor body is arranged from top to bottom. The bottom is provided with a water outlet weir, a three-phase separator, a water collecting pipe, an upper cone part and a lower cone part, the water inlet system is connected with the upper cone part through the upper cone main pipe, and the lower cone part is sequentially It is connected with the return pipe system and the water collecting pipe; the three-phase separator is connected with the gas-liquid separation tank through the gas collecting main pipe; the left and right ends of the inner side of the reactor body are provided with reflecting plates, and the reflecting plates are arranged between the water collecting pipe and the upper cone part The reactor body is provided with a water outlet pipe, and the water outlet pipe is connected with the water outlet weir; the invention solves the problem of easy blockage of the water inlet system from the root by setting up and down cones, and at the same time, the solution of the dead angle problem at the bottom of the reactor also improves the reactor. The container utilization efficiency is improved, thereby improving the treatment effect.

Description

A non-clogging water distribution anaerobic reaction device

technical field

The invention relates to a non-blocking water distribution anaerobic reaction device, which belongs to the technical field of wastewater treatment.

Background technique

In recent years, due to the rapid development of industry and agriculture, unbalanced agricultural or mixed domestic sewage, high-concentration organic wastewater, and toxic and harmful chemical wastewater have a greater destructive effect on the environment. In terms of resistance to water quality fluctuations, poisoning inhibition and low-concentration organic wastewater treatment, it has become a major problem that needs to be overcome in the wide application of anaerobic technology. Anaerobic, as a low-energy-consumption wastewater treatment technology, plays an increasingly important role in the field of wastewater biological treatment (especially high-concentration organic wastewater). Reactors are one of the fastest growing areas in the development of anaerobic treatment processes. The key to its design is how to form a uniform and stable hydraulic condition in the tank. At present, there are mainly problems such as uneven water distribution, easy occurrence of dead zone, easy blockage of water distribution system, serious calcification of the reactor, insufficient circulation, poor buffer capacity of the reactor, and serious loss of biological granular sludge. In view of this situation, it is of great practical significance to optimize the design of the water distribution structure of the anaerobic reactor, so as to realize the long-term stable and efficient operation of the reactor.

Chinese Patent Publication No.: 107720960A, publication date: February 23, 2018 The patent document discloses a rotary water distribution IC anaerobic reactor, the reactor includes a reaction tower, the bottom of which is provided with a water inlet, and the upper part of which is provided with a water inlet. There is a water outlet, and the reaction tower is provided with an inlet water distribution device, a reflux water distribution device, an internal return pipe, a first three-phase separator, a second three-phase separator, a gas-water separator, and an internal return pipe from bottom to top. The upper end of the separator is connected to the gas-water separator and the lower end faces the bottom of the reaction tower; the upper sides of the first three-phase separator and the second three-phase separator are respectively connected with a biogas collection pipe leading to the gas-water separator. The water inlet is connected to a water inlet and water distribution device, which includes a main connection pipe. One end of the main connection pipe is provided with two or more branch pipes arranged in a radial pattern. The branch pipes are provided with water inlet holes, and the water inlet holes are all Either facing counterclockwise or both facing clockwise. The sewage injected from the water inlet is mixed with the sludge containing anaerobic bacteria in the tower, so as to improve the mass transfer effect between wastewater and anaerobic bacteria. Although the reactor is arranged by the radiation of the nozzles, the water flow rotates in an orderly clockwise direction, which slows down the blockage of the nozzles to a certain extent, but when the diameter of the reactor is large, the number of nozzles is increased. It will be more difficult to achieve equal resistance loss of each touch nozzle, and the blockage problem still cannot be fundamentally solved. Chinese Patent Publication No.: 107043161A, publication date: August 15, 2017 The patent document discloses an IC anaerobic reactor, the reactor includes a tank, a mixing zone, a first anaerobic zone, and a lower three-phase separator , the second anaerobic zone, the upper three-phase separator and precipitation zone, gas-liquid separator. The mixing area includes a conical tank bottom, a water inlet pipe arranged on the upper side of the conical tank bottom, and a return pipe arranged on the upper end of the water inlet pipe; The invention can make the water inflow uniform, and the annular sludge discharge is convenient to discharge the sludge inside the equipment. However, the unavailability of the inner space of the bottom cone leads to a lower effective volume ratio of the reactor, which increases the volume of the reactor.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the existing anaerobic treatment technology, such as easy blockage, many dead corners, and uneven water distribution, resulting in slow start-up speed and low treatment efficiency, the present invention provides a non-clogging water distribution anaerobic reaction device and its treatment of wastewater. Methods.

In the present invention, the two-layer cone water distribution arranged at the bottom of the anaerobic reactor replaces the traditional nozzle-type water inflow method, and can better solve the problem of water inflow clogging. In addition, a strong turbulent flow is formed in the lower half of the reactor, so that the muddy water can fully contact the reactor, and the sludge is kept suspended below the three-phase separator under the action of upflow and biogas bubbles, thereby preventing local dead ends. Sludge improves the space utilization efficiency of the reactor. It has strong adaptability to organic wastewater in various industries, and has good resistance to load impact.

For achieving the above object, the technical scheme adopted in the present invention is as follows:

A non-clogging water distribution anaerobic reaction device, comprising a reactor body, a water inlet system, a gas collecting main pipe and a return pipe system, the top of the reactor body is provided with a gas-liquid separation tank, and the reactor body is from top to bottom. The bottom is provided with a water outlet weir, a three-phase separator, a water collecting pipe, an upper cone part and a lower cone part, the water inlet system is connected with the upper cone part through the upper cone main pipe, and the lower cone part passes through the lower cone part. The conical main pipe is connected with the return pipe system and the water collection pipe in turn; the three-phase separator is connected with the gas-liquid separation tank through the gas collection main pipe; the left and right ends of the inner side of the reactor body are provided with reflecting plates, and the reflecting plates are arranged on the water collecting pipe and the gas-liquid separation tank. between the upper cone parts; a water outlet pipe is arranged on the reactor body, and the water outlet pipe is connected with the water outlet weir.

The reactor body is the main structure of the anaerobic reactor, and the shape is mostly cylindrical, steel concrete or steel structure, the inner wall is made of anti-corrosion measures, and the outside is generally used as a thermal insulation layer;

As an improvement of the present invention, the reflecting plate is disposed in the reactor body inclined downward.

As an improvement of the present invention, the acute angle between the reflection plate and the reactor body is 25°-40°, and the horizontal projection length is the closest distance between the bottom surface of the lower cone and the inner side wall of the reactor body, 80-100° %.

As an improvement of the present invention, the upper cone part includes at least two upper cones, and the lower cone part includes at least two lower cones.

As an improvement of the present invention, the upper cone and the lower cone are both cone structures without a bottom cover, and the upper cone and the lower cone are on the same axis. The steel structure (the wall needs anti-corrosion measures) or PVC material is placed in the reactor, that is, the bottom surface of the cone is parallel to the bottom surface of the pool.

As an improvement of the present invention, the cone angle of the lower cone is 25°-65°, the distance between the bottom surface of the lower cone and the bottom of the reactor body is 1/10-3/10 of the height of the lower cone, and the The sum of the bottom areas of the cone parts is 20-50% of the bottom area of the reactor body.

As an improvement of the present invention, the cone angle of the upper cone is 25°-65°, the distance between the upper cone and the apex of the lower cone is 0.3-1.5 times the height of the upper cone, and the area of the bottom of the upper cone is 0.3-1.5 times. It is 50-100% of the bottom area of the lower cone.

As an improvement of the present invention, the return pipe system includes a return pipe, and a return pump is arranged on the return pipe; the water inlet system includes a water inlet pipe, and an inlet pump is arranged on the water inlet pipe. The return flow is 1-5 times that of the incoming water.

As an improvement of the present invention, the three-phase separator includes a three-phase separation pipe, and the three-phase separation pipe is connected to the gas collecting main pipe through the gas collecting branch pipe.

As an improvement of the present invention, the three-phase separation tube includes an upper separation tube and a lower separation tube, and the upper separation tube and the lower separation tube are alternately arranged in the reactor body. The three-phase separator is a triangular plastic plate or a stainless steel plate.

The height-diameter ratio of the reactor body is 3-6, wherein the height of the apex of the upper cone is 1/5-1/3 of the height of the reactor body.

A non-blocking water distribution anaerobic reaction device and a method for treating wastewater, the specific steps are as follows:

1. The gap formed by the upper and lower cones enables the water flow to radiate out in a plane-like oblique downward direction at a large flow rate, forming a large turbulent hydraulic condition, ensuring that the mud and liquid are fully mixed and contacted.

2. When the returning mud water passes through the annular gap between the lower cone and the bottom of the main reactor, it can obtain greater kinetic energy and carry sludge particles.

The particles or flocs run and impact the dead corner area at the bottom of the pool, which strengthens the mud-water mixing at the bottom of the pool and ensures the efficiency of the bottom container.

3. When the rising mud water passes through the reflector, a large turbulent flow can be formed to run in the opposite direction of the rising current, which further strengthens the mixing of mud and water in the area below the reflector, making the area near-fluidized and improving the biochemical reaction efficiency. .

4. When the rising mud water passes through the annular ring formed by the reflector, the flow rate changes, and the flow rate increases instantly and then resumes the original flow

At the same time, it does not destroy the structure of the sludge suspension layer, which is beneficial to the mud-water mass transfer reaction and the upper mud-water separation.

Due to the near-fluidized hydraulic conditions formed by the water inlet area at the bottom of the reactor, the reactor has strong impact resistance, can adapt to different water quality load changes and certain anti-toxic impact capabilities, and the reactor has no dead corner deposition. The volume utilization efficiency of the reactor improves the overall treatment efficiency. The reactor can adapt to organic wastewater in various industries, and has good resistance to load shock and toxicity.

A non-blocking water distribution anaerobic reaction device and a method for treating wastewater, the main technical principle: the wastewater to be treated enters the reactor body from an upper cone by an inlet pump, and passes through the gap between the upper and lower cones in an oblique downward direction. Flow through the bottom of the reactor and allow better mixing of wastewater and sludge. At the same time, the upper part of the reactor (near the lower part of the three-phase separator) is transported into the lower cone by the return pump through the sludge water collection pipe, and the return water passes through the gap between the lower cone and the bottom of the reactor to form a large impact flow rate, so that the activated sludge at the bottom is activated. A large disturbance occurs. The upper and lower cones and the reflector plate at the bottom of the reactor together form a large turbulent flow area to prevent the sludge from accumulating in the bottom dead corner. In the upper part of the reactor, under the action of rising flow rate, biogas bubbles and tiny turbulent flow, the sludge can be kept suspended and fully contacted with the wastewater, which effectively solves the problem of local deposition in the reactor. Finally, the mud water flows through the three-phase separator to realize the separation of mud and water. During the period, a part of the sludge sinks to the surrounding of the water collecting pipe and is sucked into the return pipe and then returned to the lower cone at the bottom of the reactor. The wastewater separated from the mud and water flows through the outlet weir and finally enters the outlet pipe for discharge.

Owing to having adopted the above technology, compared with the prior art, the present invention has the following beneficial effects:

The invention discloses a non-clogging high-efficiency anaerobic treatment device, which can effectively solve the clogging problem of the water inlet system.

The non-clogging water distribution anaerobic reaction device of the present invention adopts the water inlet system without nozzles and the reflector plate to strengthen the turbulent flow measures, which solves the problems of uneven and easy clogging of the water inlet and water distribution pipes. The condition of the state water body can effectively prevent the problem of sludge deposition in dead corners and improve the efficiency of the reactor container.

In the non-blocking water distribution anaerobic reaction device of the present invention, the annular ring formed by the reflector plate divides the main body of the reactor into three parts: upper, middle and lower parts, the lower part is in a fluidized state, the vicinity of the annular ring is a micro-turbulent transition zone, and the upper part is a stable Suspended state, these three states in the same reactor better meet the requirements of anaerobic treatment process.

The non-clogging water distribution anaerobic reaction device of the present invention takes the annular ring formed by the reflector as the boundary area, and the near-fluidized state in the lower part is conducive to the fully mixed reaction of mud and water, improves the impact resistance of wastewater, and prevents sedimentation at the bottom; The transition state increases the instantaneous rising flow rate, forms a micro-turbulent flow area, promotes gas-liquid separation, strengthens the microscopic mass transfer of sludge, and prevents local deposition; the upper stable suspension zone provides the three-phase separator to improve the gas-liquid-solid three-phase separation. good condition.

Description of drawings

Fig. 1 is the structural representation of a kind of non-clogging water distribution anaerobic reaction device;

In the picture: 1. Water inlet pipe, 2. Inlet water pump, 3. Upper cone, 4. Lower cone, 5. Lower cone header, 6. Return pump, 7. Upper cone header, 8. Reflector, 9 , reactor body, 10, return pipe, 11, water collection pipe, 12, three-phase separator, 13, gas collection main pipe, 14, water outlet weir, 15, gas collection branch pipe, 16, water outlet pipe, 17, gas-liquid separation tank , 18, the upper separation tube, 19, the lower separation tube.

Detailed ways

The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

Example 1:

It can be seen in conjunction with the accompanying drawings that a non-blocking water distribution anaerobic reaction device includes a reactor body 9, a water inlet system, a gas collecting main pipe 13 and a return pipe system. The top of the reactor body 9 is provided with a gas-liquid separation tank 17, The reactor body 9 is provided with a water outlet weir 14, a three-phase separator 12, a water collecting pipe 11, an upper cone part and a lower cone part in order from top to bottom, and the water inlet system is connected to the upper cone main pipe 7 through the upper cone body. The upper cone parts are connected, and the lower cone parts are connected with the return pipe system and the water collection pipe 11 in turn through the lower cone main pipe 5; the three-phase separator 12 is connected with the gas-liquid separation tank 17 through the gas collection main pipe 13; the reaction The left and right ends of the inner side of the reactor body 9 are provided with reflecting plates 8, and the reflecting plates 8 are arranged between the water collecting pipe 11 and the upper cone part; the reactor body 9 is provided with a water outlet pipe 16, the water outlet pipe 16 and the water outlet weir 14. connected.

The reflecting plate 8 is disposed in the reactor body 9 with a downward inclination.

The upper cone part includes at least two upper cones 3 , and the lower cone part includes at least two lower cones 4 .

The upper cone 3 and the lower cone 4 are both cone structures without a bottom cover, and the upper cone 3 and the lower cone 4 are on the same axis.

The return pipe system includes a return pipe 10 , and the return pipe 10 is provided with a return pump 6 ; the water inlet system includes a water inlet pipe 1 , and an inlet pump 2 is arranged on the water inlet pipe 1 .

The three-phase separator 12 includes a three-phase separation pipe. The three-phase separation pipe is connected to the gas collecting main pipe 13 through the gas collecting branch pipe 15. The three-phase separation pipe includes an upper separation pipe 18 and a lower separation pipe 19. The upper separation pipe 18 And the lower separation pipes 19 are alternately arranged in the reactor body 9 .

The reactor body 9 and the upper and lower cones 4 are made of carbon steel materials, the inner walls (including the upper and lower cones) are made of epoxy resin for corrosion resistance, and the upper and lower cones are rolled with fan-shaped steel plates, which are suspended and fixed inside the reactor by a steel frame. , the lower cone 4 is 80 mm away from the bottom of the reactor, the top and bottom angles of the upper and lower cones are both 45°, the top of the upper cone 3 is connected to the water inlet pipe 1 by welding, the distance between the vertices of the upper and lower cones is 50mm, and the vertices of the upper cone 3 are connected by welding. The height accounts for 20% of the total height of the reactor. The water collecting pipe 11 is installed in the middle and upper part of the reactor, and is 0.8 meters away from the lower part of the three-phase separator 12. The plane of the branch pipe is kept horizontal, and the perforation port is downward. The bottom area of the upper cone is 60% of the bottom area of the lower cone, and the sum of the bottom areas of all the lower cones 4 in the reactor accounts for 25% of the total area value.

The diameter of the water collecting pipe 11 is 200 mm, and the hole spacing is 0.30 m. The return pipe 10 is connected to the water collection pipe 11 and the top of the lower cone 4 , and the muddy water is transported by the return pump 6 to the return branch pipe through the water collection pipe 11 , and then enters the lower cone 4 through the return branch pipe. The downward inclination angle of the reflecting plate 8 is 30°, and the horizontal projection length is 80% of the shortest distance between the bottom surface of the lower cone 4 and the reactor pool wall.

The three-phase separator 12 is made of bottomless triangular-shaped stainless steel plate, the angle of the triangle apex is 60°, and it is divided into two layers and placed on the upper part of the main reactor, respectively, with a layer spacing of 100 mm. The top of each triangular plate is connected to the gas collecting branch pipe 15. All the gas collecting branch pipes 15 are collected to the gas collecting main pipe 13; the water outlet weir 14 is a triangular sawtooth weir and is made of stainless steel;

A non-blocking water distribution anaerobic reaction device and a method for treating wastewater, the treatment process is as follows: wastewater is pumped into an upper cone 3 through an inlet pump 2, and the water flows through the gap between the upper and lower cones in an oblique downward direction. At the bottom of the reactor, the flow rate is 324m/h, while the upper part of the reactor (close to the lower part of the three-phase separator 12) is transported into the lower cone 4 by the reflux pump 6 through the collecting pipe 11, and the reflux water passes through the lower cone 4 and the bottom of the reactor. The gap formed a larger flow rate, the flow rate was 1246m/h, which strengthened the disturbance at the bottom of the reactor. The two upper and lower cones at the bottom of the reactor and the reflector 8 together form a large turbulent flow area to prevent sludge accumulation caused by dead corners at the bottom. Due to the effect of the rising flow rate, the suspended sludge and waste water finally flow through the three-phase separator 12 to achieve sludge-water separation, during which a part of the sludge sinks to the periphery of the water collection pipe 11 and is sucked into the return pipe 10 and returned to the bottom of the reactor. The treated waste water separated from the mud water flows through the outlet weir 14 and finally enters the outlet pipe 16 .

The non-clogging anaerobic reaction device for water distribution and the method for treating waste water of the present embodiment, because the reaction process effectively prevents dead corners and solves the problem of blockage of the water inlet, so that the water distribution is more uniform, so the treatment efficiency is high and the applicability is relatively high. wide.

Example 2:

A non-blocking water distribution anaerobic reaction device and a method for treating wastewater of the present embodiment, the basic structure is the same as that of the embodiment 1, the difference is that the distance between the lower cone 4 and the bottom of the reactor is 100mm, and the top angle of the upper and lower cones is 60 mm. °, the distance between the vertices of the upper and lower cones is 90mm, the spacing between the 12 layers of the three-phase separator is 110mm, and steel plates are used with anti-corrosion measures, the downward inclination angle of the reflector 8 is 40°, and the horizontal projection length is the lower cone 4 90% of the shortest distance between the bottom surface and the reactor pool wall, the sum of the bottom area of all the lower cones 4 in the reactor accounts for 50% of the total area value. The water flow rate in the gap between the upper and lower cones is about 421 m/h, and the water flow rate in the gap between the lower cone 4 and the bottom of the reactor is 1341 m/h. The base area of the upper cone is 70% of the base area of the lower cone.

The pH of the production wastewater of a pharmaceutical enterprise: 7.6; COD: 18600-24300 mg/L, which is high-concentration organic wastewater with good biodegradability, but high suspended solids. The non-blocking water distribution anaerobic reaction device of this embodiment and its anaerobic reaction device are used. The method of treating wastewater, the treatment process is the same as that of Example 1. Granular sludge is used for medium temperature (35 ℃) acclimation culture. The COD removal rate can reach 71% after 2 weeks of operation. After 4 weeks of operation, the COD removal rate reaches 83%. A month later, the COD removal rate was as high as 90%, and the effluent COD was basically stable at about 2000 mg/L. There is no phenomenon that the granular sludge becomes smaller and smaller, indicating that the reactor has a better treatment effect.

Example 3:

A non-blocking water distribution anaerobic reaction device and a method for treating waste water of the present embodiment, the basic structure is the same as that of embodiment 1, the difference is that the distance between the lower cone 4 and the bottom of the reactor is 90 mm, and the top and bottom angles of the cones are 50°, the distance between the top angles of the upper and lower cones is 70mm, the distance between the 12 layers of the three-phase separator is 120mm, and steel plates are used with anti-corrosion measures, the downward inclination angle of the reflector 8 is 32°, and the horizontal projection length is the lower cone 87% of the shortest distance between the bottom surface of the body 4 and the reactor pool wall, and the sum of the bottom area of all the lower cones 4 in the reactor accounts for 35% of the total area value. The water flow rate in the gap between the upper and lower cones is about 357m/h, and the water flow rate in the gap between the lower cone 4 and the bottom of the reactor is 1481m/h. The base area of the upper cone is 80% of the base area of the lower cone.

The pH of the production wastewater of a certain sweet potato starch enterprise: 5.3; COD: 13500-18300mg/L, which is high-concentration organic wastewater with good biodegradability, but high suspended solids. The non-blocking water distribution anaerobic reaction device of the present embodiment and its anaerobic reaction device are used. The method of treating wastewater, the treatment process is the same as that of Example 1. The granular sludge used to treat starch wastewater is used for medium temperature (35°C) culture and domestication. The COD removal rate can reach 68% after 1 week of operation. After 2 weeks of operation, the COD removal rate reached 85%. %, after running for one month, the COD removal rate is as high as 92%, and the effluent COD is basically stable at about 1000 mg/L.

The above-mentioned embodiments are only the preferred technical solutions of the present invention, and should not be regarded as limitations of the present invention. The protection scope of the present invention should be based on the technical solutions recorded in the claims, including the equivalent replacement of the technical features in the technical solutions recorded in the claims. The scheme is the protection scope, that is, the equivalent replacement and improvement within this scope are also within the protection scope of the present invention.

Claims (4)

1. The utility model provides a no jam water distribution anaerobic reaction device which characterized in that: the reactor comprises a reactor body, a water inlet system, a gas collecting main pipe and a return pipe system, wherein a gas-liquid separation tank is arranged at the top end of the reactor body, a water outlet weir, a three-phase separator, a water collecting pipe, an upper cone body part and a lower cone body part are sequentially arranged in the reactor body from top to bottom, the water inlet system is connected with the upper cone body part through the upper cone main pipe, and the lower cone body part is sequentially connected with the return pipe system and the water collecting pipe through the lower cone main pipe; the three-phase separator is connected with the gas-liquid separation tank through a gas collection main pipe; the left end and the right end of the inner side of the reactor body are respectively provided with a reflecting plate, and the reflecting plates are arranged between the water collecting pipe and the upper cone body part; the reactor body is provided with a water outlet pipe, and the water outlet pipe is connected with a water outlet weir;

the upper cone member comprises at least 2 upper cones, and the lower cone member comprises at least 2 lower cones;

the upper cone and the lower cone are of a circular cone structure without a bottom cover, and the upper cone and the lower cone are on the same axis;

the cone angle of the lower cone is 25-65 degrees, the distance between the bottom surface of the lower cone and the bottom of the reactor body is 1/10-3/10 of the height of the lower cone, and the sum of the bottom areas of the lower cone parts is 20-50 percent of the bottom area of the reactor body;

the reflecting plate is obliquely arranged in the reactor body downwards;

an acute included angle between the reflecting plate and the reactor body is 25-40 degrees;

the cone angle of the upper cone is 25-65 degrees, the distance between the top point of the upper cone and the top point of the lower cone is 0.3-1.5 times of the height of the upper cone, and the bottom area of the upper cone is 50-100% of the bottom area of the lower cone.

2. The non-clogging water distribution anaerobic reaction device of claim 1, which is characterized in that: the backflow pipe system comprises a backflow pipe, and a backflow pump is arranged on the backflow pipe; the water inlet system comprises a water inlet pipe, and a water inlet pump is arranged on the water inlet pipe.

3. The non-clogging water distribution anaerobic reaction device of claim 1, which is characterized in that: the three-phase separator comprises a three-phase separation pipe, and the three-phase separation pipe is connected with the gas collection main pipe through a gas collection branch pipe.

4. The non-clogging water distribution anaerobic reaction device of claim 1, which is characterized in that: the three-phase separating pipe comprises an upper separating pipe and a lower separating pipe, and the upper separating pipe and the lower separating pipe are arranged in the reactor body in a staggered mode.

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