Internal circulation waste liquid anaerobic treatment device

Abstract

The utility model discloses an internal circulation waste liquid anaerobic treatment device which is characterized in that an effluent weir and inclined tube filler which are distributed up and down are arranged in a reaction tank, a gas-liquid separator is arranged outside the reaction tank, and an inlet of the gas-liquid separator is connected with a gas collecting pipe; the three-phase separator is arranged in the reaction tank, the three-phase separator is positioned below the inclined tube filler, and a gas phase outlet of the three-phase separator is connected with the gas collecting pipe; an inlet of the pulse tank is connected with a waste liquid input pipe, an outlet of the pulse tank is connected with a waste liquid distributor located in the bottom of the reaction tank, and an outlet of the waste liquid distributor faces upwards; an inlet of the circulating pump is connected with the interior of the reaction tank, an outlet of the circulating pump is connected with a circulating water distributor located in the reaction tank, the circulating water distributor is located between the three-phase separator and the waste liquid distributor, and an outlet of the circulating water distributor faces downwards. The device disclosed by the utility model is reliable in waste liquid treatment, capable of effectively improving the anaerobic reaction rate through opposite flushing water distribution, capable of guaranteeing the performance of anaerobic particles and stable in anaerobic reaction.

Description

TECHNICAL FIELD

[0001] The utility model relates to anaerobic treatment technical field, especially an inner circulation's waste liquid anaerobic treatment device. BACKGROUND

[0002] With the rapid development of industry and the expansion of production scale, waste liquid generated in the process of industrial or agricultural activities needs to be treated to meet the standards before being discharged, and anaerobic biological technology is widely used in the treatment of harmful waste liquid.

[0003] Anaerobic treatment refers to the decomposition and conversion of organic matter in waste liquid by anaerobic organisms under the condition of no molecular oxygen, and finally forming methane, carbon dioxide, water, hydrogen sulfide and ammonia and other substances. In the related technology, the anaerobic treatment of waste liquid is carried out in the internal space of the pool or water tank, and the anaerobic particles carrying anaerobic organisms are placed in the treatment space, and the waste liquid is decomposed and converted by the anaerobic particles, and the rising gas is mixed with the waste liquid violently, and the treated waste liquid is easy to carry the anaerobic particles when output, which leads to the significant decrease of the amount of anaerobic organisms in the treatment device, and finally leads to the decrease of the anaerobic treatment effect. SUMMARY

[0004] The utility model aims at solving one of the technical problems existing in the prior art. To this end, the utility model provides an inner circulation's waste liquid anaerobic treatment device, which can effectively separate different state of matter, so as to keep the anaerobic treatment effect stable and reliable, and the anaerobic reaction rate is high.

[0005] According to the utility model embodiment, an inner circulation's waste liquid anaerobic treatment device comprises:

[0006] The reaction tank is provided with a water weir and an inclined pipe filler distributed upward and downward, the outlet and inlet of the inclined pipe filler are inclined upward and downward respectively, the reaction tank is provided with a gas-liquid separator, and the inlet of the gas-liquid separator is connected with a gas collecting pipe;

[0007] The three-phase separator is arranged in the reaction tank, the three-phase separator is located below the inclined pipe filler, the gas phase outlet of the three-phase separator is connected with the gas collecting pipe, the liquid phase outlet of the three-phase separator faces upward, and the waste liquid inlet and solid phase outlet of the three-phase separator both face downward;

[0008] The pulse tank is arranged outside the reaction tank, the inlet of the pulse tank is connected with a waste liquid input pipe, the outlet of the pulse tank is connected with a waste liquid water distributor located in the bottom of the reaction tank, the waste liquid water distributor is located below the three-phase separator, and the outlet of the waste liquid water distributor faces upward;

[0009] A circulating pump is arranged outside the reaction tank, the inlet of the circulating pump is connected to the inside of the reaction tank, the outlet of the circulating pump is connected to a circulating water distributor located in the reaction tank, the circulating water distributor is located between the three-phase separator and the waste liquid water distributor, the outlet of the circulating water distributor faces downward, and the output flow of the circulating water distributor is less than the output flow of the waste liquid water distributor.

[0010] In the embodiment, the ratio of the output flow of the circulating water distributor to the output flow of the waste liquid water distributor is a:b, and 1.5a≤b≤3a.

[0011] In the embodiment, the waste liquid water distributor is a siphon pulse water distributor.

[0012] In the embodiment, the connection between the inlet of the circulating pump and the reaction tank is located below the circulating water distributor.

[0013] In the embodiment, an acute angle α is formed between the pipe axis of the inclined pipe filler and the horizontal plane, and 45°≤α≤80°.

[0014] In the embodiment, the three-phase separator comprises a first gas seal cover and a second gas seal cover, the first gas seal cover is provided with a plurality of and uniformly distributed, each adjacent two first gas seal covers are formed with a waste liquid inlet, the second gas seal cover is provided with a plurality of and located above the corresponding waste liquid inlet, each adjacent two second gas seal covers are formed with a liquid phase outlet, each liquid phase outlet is located above the corresponding first gas seal cover, and the top of the first gas seal cover and the second gas seal cover is provided with a gas phase outlet.

[0015] In the embodiment, the bottom of the second gas seal cover is connected with a flow guide plate, the flow guide plate is located between the liquid phase outlet and the first gas seal cover, the lower side of the flow guide plate is provided with a baffle plate located between the first gas seal cover and the second gas seal cover, a flow guide channel is formed between the flow guide plate and the baffle plate, the inlet of the flow guide channel is opposite to the second gas seal cover, the outlet of the flow guide channel is opposite to the first gas seal cover, and a solid phase outlet is formed between the baffle plate and the first gas seal cover.

[0016] In the embodiment, the reaction tank is further provided with a sampling pipe.

[0017] The embodiment of the utility model has at least the following beneficial effects:

[0018] By arranging multiple groups of treatment structures in the reaction tank along the gravity direction, the waste liquid after anaerobic biological reaction can be effectively separated and treated, the solid anaerobic particles can be precipitated and circulated to the bottom of the reaction tank, the gas is recycled through the gas-liquid separator, and the waste liquid after anaerobic reaction is discharged to the next treatment process through the water outlet weir, so that the waste liquid treatment effect is reliable; by arranging the waste liquid distributor and the circulating water distributor in the lower area of the reaction tank, the contact area between the waste liquid and the anaerobic particles can be effectively increased, the mass transfer efficiency is high, the anaerobic reaction rate can be effectively improved, and the turbulent flow formed by the opposite water distribution can also stir and disperse the anaerobic particles, so that the anaerobic particles are uniformly distributed, the contact between the anaerobic particles and the waste liquid is further promoted, and the anaerobic reaction rate is further accelerated; the opposite water distribution mode can also effectively reduce the shear force formed by the water flow, thereby effectively reducing the probability of the anaerobic particles being broken by the shear force, effectively protecting the performance of the anaerobic particles, and effectively ensuring the stability of the anaerobic reaction effect; in addition, the output flow of the circulating water distributor is less than that of the waste liquid water distributor, which can not only ensure that the upward water flow is formed in the reaction tank, but also effectively slow down the flow speed of the waste liquid, so that sufficient anaerobic reaction time is provided for the waste liquid, and the separation working pressure of the three-phase separator is effectively reduced, so that the waste liquid treatment effect is good and the service life is long. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0020] Figure 1 It is a structural schematic view of the internal circulation waste liquid anaerobic treatment device of the embodiment of the present utility model;

[0021] Figure 2 It is a partial structural schematic view of the three-phase separator in the internal circulation waste liquid anaerobic treatment device of the embodiment of the present utility model;

[0022] Figure 3 It is an application state schematic view of the internal circulation waste liquid anaerobic treatment device of the embodiment of the present utility model.

[0023] Reference signs:

[0024] Reaction tank 100, water weir 110, inclined pipe filler 120, gas-liquid separator 130, gas collector 131, sampling pipe 140;

[0025] Three-phase separator 200, waste liquid inlet 201, liquid phase outlet 202, gas phase outlet 203, solid phase outlet 204, first gas seal cover 210, second gas seal cover 220, flow guide plate 230, baffle 240, flow guide channel 250;

[0026] Pulse tank 300, waste liquid input pipe 310, waste liquid water distributor 320;

[0027] Circulating pump 400, circulating water distributor 410. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as limiting the present application.

[0029] In the description of the present application, it should be understood that, if the orientation description, such as up, down, left, right, front, back and the like, is described, the orientation or position relationship shown in the drawings is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0030] In the description of the present application, if the line sleeve, support is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0031] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0032] The waste liquid generated in the process of industrial or agricultural activities needs to be treated to meet the standard before it can be discharged, and the amount and complexity of the waste liquid discharged in the production process are also rising. In view of this problem, anaerobic biological technology is widely used in the treatment of high-concentration, difficult-degradable harmful waste liquid. Anaerobic treatment refers to the decomposition and conversion of organic matter in waste liquid by anaerobic organisms under the condition of no molecular oxygen, and finally forming methane, carbon dioxide, water, hydrogen sulfide and ammonia and other substances. In this process, the metabolic processes of different microorganisms influence and restrict each other, forming a complex ecological system.

[0033] In the related art, the anaerobic treatment of waste liquid is carried out in the internal space of a pool or a water tank, anaerobic particles carrying anaerobic organisms are placed in the treatment space, and the waste liquid is decomposed and converted by the anaerobic particles. During the treatment process, the rising gas mixes violently with the waste liquid. Due to the lack of effective separation and interception means, the treated waste liquid is easy to carry anaerobic particles when being output, which leads to a significant decrease in the amount of anaerobic organisms in the treatment device, and ultimately leads to a decrease in the anaerobic treatment effect and unstable treatment effect. In addition, in the prior art, the contact between the waste liquid and the anaerobic particles is insufficient, which leads to insufficient reaction rate of anaerobic treatment, poor biochemical treatment effect, unstable quality of output wastewater, and difficulty in meeting the discharge standard. Especially under high load conditions, local acidification problems are prone to occur, and the anaerobic treatment effect is poor. In some technologies, separation technology is used to separate substances in different states, but such simple separation structure is prone to problems such as blockage and high separation pressure, which leads to poor separation effect and even reduces the anaerobic treatment effect. In addition, some devices use a single pipe to supply waste liquid, and the wastewater is sent to a fixed position in the reaction tank, which has a significant dead zone, and the anaerobic treatment reaction position is uneven, and the treatment speed is slow. Therefore, there is an urgent need for an efficient, stable and energy-saving internal circulation waste liquid anaerobic treatment device to improve the anaerobic treatment effect of waste liquid.

[0034] The following refers to the accompanying Figure 1 to the accompanying Figure 3 The internal circulation waste liquid anaerobic treatment device of the embodiments of the present application can effectively separate substances in different states, thereby maintaining stable and reliable anaerobic treatment effect and high anaerobic reaction rate.

[0035] Referring to Figures 1 to 3 The internal circulation waste liquid anaerobic treatment device of the embodiments of the present application comprises:

[0036] The reaction tank 100 is provided with a water outlet weir 110 and an inclined pipe filler 120 inside. The bottom of the reaction tank 100 is used to arrange anaerobic particles to form a sludge bed. The anaerobic particles are granular sludge carrying anaerobic organisms. The water outlet weir 110 is a drainage structure composed of multiple triangular structures, which can effectively control the water outlet speed and realize water level adjustment. The inclined pipe filler 120 is located below the water outlet weir 110. The inclined pipe filler 120 is laid along the cross section of the reaction tank 100 to divide the internal space of the reaction tank 100. It is ensured that the waste liquid below needs to pass through the inclined pipe filler 120 to reach the water outlet weir 110. The outlet and inlet of the inclined pipe filler 120 are inclined upward and downward, respectively. The reaction tank 100 is provided with a gas-liquid separator 130. The inlet of the gas-liquid separator 130 is connected with a gas collecting pipe 131. The outlet of the gas-liquid separator 130 is connected with an exhaust pipe for outputting biogas.

[0037] The three-phase separator 200 is arranged in the reaction tank 100, and the three-phase separator 200 is located below the inclined tube filler 120, that is, the three-phase separator 200 is located on the side of the inclined tube filler 120 away from the water weir 110, the gas phase outlet 203 of the three-phase separator 200 is connected to the end of the gas collecting pipe 131 away from the gas-liquid separator 130, the liquid phase outlet 202 of the three-phase separator 200 faces upward, and the waste liquid inlet 201 and the solid phase outlet 204 of the three-phase separator 200 both face downward;

[0038] The pulse tank 300 is arranged outside the reaction tank 100, the inlet of the pulse tank 300 is connected to the waste liquid input pipe 310, the outlet of the pulse tank 300 is connected to the waste liquid distributor 320 located in the bottom of the reaction tank 100, that is, the waste liquid distributor 320 is located in the bottom of the inside of the reaction tank 100, the waste liquid distributor 320 is located below the anaerobic granular sludge bed, the waste liquid distributor 320 is located below the three-phase separator 200, that is, the waste liquid distributor 320 is located on the side of the three-phase separator 200 away from the inclined tube filler 120, and the outlet of the waste liquid distributor 320 faces upward, that is, the outlet of the waste liquid distributor 320 faces the three-phase separator 200, wherein the waste liquid input pipe 310 is connected to a water pump for conveying waste water to the pulse tank 300.

[0039] The circulating pump 400 is arranged outside the reaction tank 100, the inlet of the circulating pump 400 is connected to the inside of the reaction tank 100, so that the circulating pump 400 can pump the waste liquid in the reaction tank 100, the outlet of the circulating pump 400 is connected to the circulating water distributor 410 located in the reaction tank 100, the circulating water distributor 410 is located between the three-phase separator 200 and the waste liquid distributor 320, that is, the circulating water distributor 410 is located on the side of the three-phase separator 200 away from the inclined tube filler 120, and the circulating water distributor 410 is located on the side of the waste liquid distributor 320 close to the three-phase separator 200, the outlet of the circulating water distributor 410 faces downward, that is, the outlet of the circulating water distributor 410 faces the waste liquid distributor 320, the circulating water distributor 410 and the waste liquid distributor 320 form a waste liquid output in a butt joint manner, which can increase the contact area between the waste liquid and the anaerobic granules, not only improve the efficiency of biological treatment, but also disperse and stir the anaerobic granules, further accelerate the reaction, the waste liquid in a butt joint manner can reduce the influence of shear force and reduce the three-phase separation pressure of the three-phase separator 200, which can ensure the effect of three-phase separation, and the output flow of the circulating water distributor 410 is less than the output flow of the waste liquid distributor 320, so as to ensure that the reaction tank 100 can form an upward water flow.

[0040] In the above expressions, the axis of the reaction tank 100 is arranged perpendicular to the horizontal plane, downward refers to the direction of gravitational acceleration, and upward refers to the direction opposite to the gravitational acceleration.

[0041] The anaerobic biological reaction waste liquid can be effectively separated and treated, the solid anaerobic particles can be precipitated and circulated to the bottom of the reaction tank 100, the gas is recycled through the gas-liquid separator 130, the waste liquid after the anaerobic reaction is discharged to the next treatment process through the water weir 110, and the waste liquid treatment effect is reliable; the cross-flow water distributor 320 and the circulating water distributor 410 arranged in the lower area of the reaction tank 100 can effectively increase the contact area between the waste liquid and the anaerobic particles, the mass transfer efficiency is high, the anaerobic reaction rate can be effectively improved, and the turbulent flow formed by the cross-flow water distribution mode can also stir and disperse the anaerobic particles, the anaerobic particles are uniformly distributed, the anaerobic particles at the bottom of the reaction tank 100 are prevented from being accumulated or caked, the contact between the anaerobic particles and the waste liquid can be further promoted, and thus the anaerobic reaction rate is further accelerated, the cross-flow water distribution mode can also effectively reduce the shear force formed by the water flow, thereby effectively reducing the probability of the anaerobic particles being broken by the shear force, the performance of the anaerobic particles is effectively guaranteed, the anaerobic particles can be effectively settled and retained, the high anaerobic biomass can be maintained, the anaerobic reaction effect can be effectively ensured, the anaerobic material replenishment period can be effectively prolonged, and the operation cost can be effectively reduced; in addition, the output flow of the circulating water distributor 410 is less than the output flow of the waste liquid water distributor 320, while ensuring that the upward water flow can be formed in the reaction tank 100, the waste liquid upward flow speed can be effectively slowed down, a low-speed upward layer is formed, the waste liquid can be provided with sufficient anaerobic reaction time, the separation work pressure of the three-phase separator 200 can be effectively reduced, the three-phase separation effect can be effectively improved, the working pressure of the inclined pipe filler 120 can be further reduced, the solid-liquid separation effect of the inclined pipe filler 120 can be improved, the waste liquid treatment effect of the device is good, the service life is long, the anaerobic particles can be effectively settled and recycled, the biomass in the reaction tank 100 can be effectively guaranteed, and the long-term operation anaerobic treatment effect is stable; the circulating pump 400 can be adjusted to adjust the hydraulic load, thereby avoiding short flow and dead zones, ensuring uniform hydraulic distribution of the reaction tank 100, and the cooperation of the waste liquid water distributor 320 of the pulse tank 300 can realize intermittent water feeding, which can effectively adapt to high-concentration waste liquid treatment requirements, and can effectively reduce the instantaneous load impact.

[0042] The working process of the waste liquid anaerobic treatment device is as follows: the waste liquid in the pulse tank 300 is uniformly input into the reaction tank 100 in a pulse manner through the waste liquid distributor 320 in the waste liquid input pipe 310. According to the carrier fluidization principle, the waste liquid with a high upward flow rate can be fully contacted with the anaerobic particles. When the waste liquid and the biogas generated therefrom flow upward through the sludge bed of the anaerobic particles, relative movement occurs between the sludge bed and the liquid, and a series of biochemical reactions occur between the anaerobic particles and the waste liquid, forming a complex microbial ecosystem. The organic matter is degraded while the gas is generated. On the one hand, the sufficient contact and mixing between the waste liquid and the anaerobic particles can accelerate the biochemical reaction process, and on the other hand, the condition of excessive load at the bottom of the static sludge bed can be reduced or eliminated, thereby increasing the organic load bearing capacity of the treatment device. The sludge-water mixture of the waste liquid and the anaerobic particles at the bottom of the reaction tank 100 is lifted to the circulating water distributor 410 by the circulating pump 400 and is input into the waste liquid distributor 320. The waste liquid distributor 320 outputs water upward, and the circulating water distributor 410 outputs water downward. The waste liquid distributor 320 and the circulating water distributor 410 form a staggered water distribution mode, which can effectively increase the collision between the reactants in the waste liquid and the anaerobic particles, effectively eliminate the dead zone in the reaction tank 100, thereby effectively improving the mixing effect of the sludge-water mixture and the removal efficiency of the organic matter, and slowing down the upward flow rate of the waste liquid. During the upward process, the waste liquid enters the three-phase separator 200 after swelling in the sludge, so as to realize the separation of gas, solid and liquid. The anaerobic particle sludge backflows and settles at the bottom of the reaction tank 100. The gas is lifted to the gas-liquid separator 130 through the gas collecting pipe 131, is purified, and is output from the gas discharge pipe. The upward waste liquid reaches the inclined pipe filler 120 to realize solid-liquid separation, the anaerobic particle sludge settles and falls back, and the treated water after anaerobic treatment is transported to the water outlet weir 110 and is discharged. In application, the flow states of the waste liquid, the sludge-water mixture, the biogas and the treated water are shown in the accompanying drawings. Figure 3

[0043] It can be understood that the ratio of the output flow rate of the circulating water distributor 410 to the output flow rate of the waste liquid distributor 320 is a:b, and 1.5a≤b≤3a, that is, the output flow rate of the waste liquid distributor 320 is 1.5-3 times that of the circulating water distributor 410.

[0044] ​The flow rate of the waste liquid distributor 320 needs to be greater than that of the circulation distributor 410 to maintain a stable upward water flow in the reaction tank 100, avoid water flow disorder caused by excessive circulation flow rate, affect sludge settling and three-phase separation effect, form moderate turbulence, enhance the contact between waste liquid and anaerobic sludge, and improve the organic matter degradation rate. When b = 2a, that is, the flow rate of the waste liquid distributor 320 is 2 times that of the circulation distributor 410, the sludge suspension state in the reactor is optimal, and the COD chemical oxygen demand removal rate can be increased by 15% to 20%. Excessive circulation flow rate, such as b < 1.5a, can cause local shear force to increase, break sludge particles, and affect the settling performance; and a reasonable flow rate ratio of 1.5 to 3 times can balance the mixing intensity and shear force and protect the sludge structure.

[0045] It can be understood that the waste liquid distributor 320 is a siphon pulse distributor, and the waste liquid input pipe 310 is connected to a waste liquid storage container. The siphon pulse distributor mainly includes a water inlet buffer chamber, a siphon pipe, and a pulse release port. The water inlet buffer chamber is connected to the waste liquid input pipe 310 and is used for temporarily storing the waste liquid to be treated. The siphon pipe adopts a U-shaped or inverted J-shaped structure, and when the liquid level reaches a set height, the siphon effect is triggered to achieve instantaneous large-flow drainage. The pulse release port is provided with multiple and uniformly arranged outlets in the reaction tank 100 as water distribution outlets to ensure that the waste liquid is uniformly sprayed in a pulse form.

[0046] In operation, the siphon pulse distributor mainly includes the following three stages: water storage stage: the waste liquid enters the buffer chamber through the waste liquid input pipe 310, and the liquid level gradually rises; siphon triggering stage: when the liquid level exceeds the top of the siphon pipe, negative pressure is formed, the waste liquid is quickly sucked and sprayed into the reaction tank 100, and strong hydraulic impact is formed; and drainage stage: the siphon effect continues until the liquid level in the buffer chamber drops below the inlet of the siphon pipe, and then the circulation is restarted. Pulse water inlet can cover a larger area to prevent dead zones or channeling in the reaction tank 100, improve sludge utilization rate, instantaneous large-flow impact can fully suspend the sludge bed at the bottom, promote the contact between the waste liquid and microorganisms, improve the reaction efficiency, and automatically operate by using the siphon principle to reduce energy consumption.

[0047] It can be understood that the inlet of the circulation pump 400 is located below the circulation distributor 410, and preferably, the inlet of the circulation pump 400 is located at the side of the bottom region of the reaction tank 100. The circulation pump 400 draws waste liquid from the bottom region of the reaction tank 100, which can fully utilize the gravity effect to reduce the pumping energy consumption; and the inlet of the circulation pump 400 is located at the side of the bottom of the reaction tank 100, which can reduce the impurities mixed into the waste liquid sucked by the circulation pump 400, effectively prolonging the service life of the circulation pump 400.

[0048] Preferably, the inlet height of the circulating pump 400 is controlled at 10-30 cm above the anaerobic granular sludge sediment layer, which can be adjusted according to the concentration of the anaerobic granules, to ensure that the extracted is the sludge-water mixture of the waste liquid and the anaerobic granules, rather than the compact anaerobic granular sludge completely settled, which can prevent the sudden decrease of the anaerobic granule concentration in the reaction tank 100, thereby maintaining the biological activity of the circulating liquid.

[0049] It can be understood that the pipe axis of the inclined tube filler 120 forms an acute angle a with the horizontal plane, and 45°≤a≤80°. If a<45°, the inclination of the inclined tube filler 120 is too slow, which can cause the flow rate of the rising waste liquid in the inclined tube to decrease, and the anaerobic granules to be easily deposited on the surface of the filler, causing blockage and reducing the separation efficiency. If a>80°, the inclination of the inclined tube filler 120 is too steep, which can cause the contact time between the rising waste liquid and the sludge to be insufficient, reducing the sludge interception effect; the rising path is too short, and the solid-liquid separation is not sufficient, affecting the water quality of the final output treated water. The inclination angle allows the settled sludge to naturally slide down under the action of gravity, reducing the risk of blockage, and effectively ensuring the solid-liquid separation effect.

[0050] It can be understood that the three-phase separator 200 includes a plurality of first gas sealing covers 210 and a plurality of second gas sealing covers 220, the plurality of first gas sealing covers 210 are uniformly distributed, the first gas sealing cover 210 is a reverse V-shaped reverse buckle structure, each adjacent two first gas sealing covers 210 form a waste liquid inlet 201 therebetween, the plurality of second gas sealing covers 220 are respectively located above each corresponding waste liquid inlet 201, each adjacent two second gas sealing covers 220 form a liquid phase outlet 202 therebetween, each liquid phase outlet 202 is located above each corresponding first gas sealing cover 210, and the top of each first gas sealing cover 210 and each second gas sealing cover 220 is provided with a gas phase outlet 203.

[0051] The working process of the three-phase separator 200 is as follows: the waste liquid after anaerobic treatment is transported from bottom to top, part of the waste liquid separates out the gas phase material at the first gas sealing cover 210 and is transported to the gas-liquid separator 130 through the gas phase outlet 203 and the gas collecting pipe 131; part of the waste liquid is transmitted to the second gas sealing cover 220 under the blocking action of the baffle 240, and separates out the gas phase material which is transported to the gas-liquid separator 130 through the gas phase outlet 203 and the gas collecting pipe 131; the waste liquid after separation in the second gas phase separator flows transversely to the liquid phase outlet 202 for output, and the solid phase material sinks downward along the outer wall of the first gas sealing cover 210 and falls back to the bottom of the reaction tank 100.

[0052] It can be understood that the three-phase separator 200 is provided with a plurality of groups of first gas sealing covers 210, second gas sealing covers 220, and corresponding waste liquid inlets 201, liquid phase outlets 202, and gas phase outlets 203. In one application example, referring to FIG. 2, the three-phase separator 200 is provided with two groups of first gas sealing covers 210, two groups of second gas sealing covers 220, and two groups of corresponding waste liquid inlets 201, liquid phase outlets 202, and gas phase outlets 203. Figure 2As shown, the bottom edge of the second gas sealing cover 220 is connected with the flow guide plate 230, the flow guide plate 230 is located between the liquid phase outlet and the first gas sealing cover 210, the lower side of the flow guide plate 230 is provided with the baffle 240 located between the first gas sealing cover 210 and the second gas sealing cover 220, the opposite flow guide plate 230 and the baffle 240 form the flow guide channel 250, preferably, the flow guide plate 230 and the baffle 240 are parallel to each other, the inlet of the flow guide channel 250 is opposite to the inside of the second gas sealing cover 220, the outlet of the flow guide channel 250 is opposite to the outside of the first gas sealing cover 210, and the baffle 240 and the opposite first gas sealing cover 210 form the solid phase outlet 204.

[0053] At this time, the working process of the three-phase separator 200 is as follows: the waste liquid after anaerobic treatment is transported from bottom to top, part of the waste liquid is separated from the gas phase material at the first gas sealing cover 210 and transported to the gas-liquid separator 130 through the gas phase outlet 203 and the gas collecting pipe 131; part of the waste liquid is transmitted to the second gas sealing cover 220 under the blocking action of the baffle 240, and the gas phase material is separated and transported to the gas-liquid separator 130 through the gas phase outlet 203 and the gas collecting pipe 131; the waste liquid after separation in the second gas phase separator advances to the outside of the first gas sealing cover 210 through the flow guide channel 250, and under the blocking action of the first gas sealing cover 210 and the density difference between the liquid phase material and the solid phase material, the liquid phase material is output upward from the liquid phase outlet 202, and the solid phase material is settled downward from the solid phase outlet 204 back to the bottom of the reaction tank 100, thereby realizing reliable three-phase separation effect.

[0054] Through the inclined flow guide channel 250 cooperating with the first gas sealing cover 210 and the second gas sealing cover 220, the effective separation of the gas, liquid and solid three-phase materials can be realized, after the gas is separated from the first gas sealing cover 210 and the second gas sealing cover 220 and reaches the gas-liquid separator 310 through the gas phase outlet 203 and the gas collecting pipe 131, the sludge-water mixture enters the flow guide channel 250 from the lower side of the second gas sealing cover 220 and advances to the outer wall of the first gas sealing cover 210 obliquely downward, which can form the upper and lower layered liquid phase material and solid phase material in advance, under the blocking action of the first gas sealing cover 210, the horizontal deceleration can be realized, thereby further increasing the separation of the solid phase material and the liquid phase material, the liquid phase material is output upward under the action of the water flow, part of the solid phase material is settled back to the bottom of the reaction tank 100 from the solid phase outlet 204, and the three-phase separation effect is good.

[0055] It can be understood that the reaction tank 100 is also provided with the sampling pipe 140, the sampling pipe 140 is connected with the internal space of the reaction tank 100, and the waste liquid in the reaction tank 100 can be sampled and detected through the sampling pipe 140, thereby effectively monitoring the anaerobic treatment effect of the waste liquid.

[0056] Preferably, the sampling pipe 140 is provided with three roots, two of which are connected to the reaction tank 100 near the circulating water distributor 410 and the waste liquid water distributor 320 respectively, and the remaining one is connected to the reaction tank 100 between the water outlet weir 110 and the inclined pipe filler 120, which is used for sampling and detecting the waste liquid in different areas, and is convenient for maintenance and detection.

[0057] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. An internally-circulated waste liquid anaerobic treatment apparatus, characterized by comprising: The utility model relates to a kind of waste liquid treatment device, including: Reaction tank (100), water weir (110) and inclined tube filling (120) are arranged in the reaction tank (100) in up and down distribution, the outlet and the inlet of the inclined tube filling (120) are inclined upward and inclined downward respectively, gas-liquid separator (130) is arranged outside the reaction tank (100), and the inlet of the gas-liquid separator (130) is connected with gas collector (131); Three-phase separator (200) is arranged in the reaction tank (100), and the three-phase separator (200) is located below the inclined tube filling (120), the gas phase outlet (203) of the three-phase separator (200) is connected with the gas collector (131), the liquid phase outlet (202) of the three-phase separator (200) is upward, and the waste liquid inlet (201) and the solid phase outlet (204) of the three-phase separator (200) are downward; Pulse tank (300) is arranged outside the reaction tank (100), the inlet of the pulse tank (300) is connected with waste liquid input pipe (310), the outlet of the pulse tank (300) is connected with waste liquid distributor (320) located in the bottom of the reaction tank (100), the waste liquid distributor (320) is located below the three-phase separator (200), and the outlet of the waste liquid distributor (320) is upward; Circulating pump (400) is arranged outside the reaction tank (100), the inlet of the circulating pump (400) is connected with the inside of the reaction tank (100), the outlet of the circulating pump (400) is connected with circulating distributor (410) located in the reaction tank (100), the circulating distributor (410) is located between the three-phase separator (200) and the waste liquid distributor (320), the outlet of the circulating distributor (410) is downward, and the output flow of the circulating distributor (410) is less than the output flow of the waste liquid distributor (320).

2. An internally recycled waste liquid anaerobic treatment apparatus according to claim 1, wherein The ratio of the output flow of the circulating distributor (410) to the output flow of the waste liquid distributor (320) is a:b, and 1.5a≤b≤3a.

3. An internal circulation type waste liquid anaerobic treatment apparatus according to claim 1, wherein The waste liquid distributor (320) is a siphon pulse distributor.

4. An internal circulation type waste liquid anaerobic treatment apparatus according to claim 1, wherein The inlet of the circulating pump (400) is connected with the reaction tank (100) below the circulating distributor (410).

5. The apparatus of claim 1 wherein, The pipe axis of the inclined tube filling (120) forms an acute angle α between the horizontal plane, and 45°≤α≤80°.

6. An internal circulation type waste liquid anaerobic treatment apparatus according to claim 1, wherein The three-phase separator (200) comprises a first gas seal cover (210) and a second gas seal cover (220), the first gas seal cover (210) is provided with a plurality of and uniformly distributed, each adjacent two first gas seal covers (210) form a waste liquid inlet (201) therebetween, the second gas seal cover (220) is provided with a plurality of and respectively located above the corresponding waste liquid inlet (201), each adjacent two second gas seal covers (220) form a liquid phase outlet (202) therebetween, each liquid phase outlet (202) is respectively located above the corresponding first gas seal cover (210), the top of the first gas seal cover (210) and the second gas seal cover (220) is provided with the gas phase outlet (203).

7. An internally recycled waste liquid anaerobic treatment apparatus according to claim 6, wherein The bottom of the second gas seal cover (220) is connected with a flow guide plate (230), the flow guide plate (230) is located between the liquid phase outlet and the first gas seal cover (210), the lower side of the flow guide plate (230) is provided with a baffle (240) located between the first gas seal cover (210) and the second gas seal cover (220), a flow guide channel (250) is formed between the flow guide plate (230) and the baffle (240), the inlet of the flow guide channel (250) is opposite to the second gas seal cover (220), the outlet of the flow guide channel (250) is opposite to the first gas seal cover (210), the baffle (240) and the first gas seal cover (210) form the solid phase outlet (204) therebetween.

8. An internal circulation type waste liquid anaerobic treatment apparatus according to claim 1, wherein The reaction tank (100) is also provided with a sampling pipe (140).

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