UASB (Upflow Anaerobic Sludge Blanket) pretreatment equipment for zero discharge process of high-concentration industrial wastewater

Abstract

The utility model relates to UASB (Upflow Anaerobic Sludge Blanket) pretreatment equipment for a high-concentration industrial wastewater zero discharge process. A reactor is internally provided with an ascending reaction zone, a three-phase separation zone, an effluent weir and an air chamber. The lower part of the reactor is an ascending reaction area, the upper part is a combined area, a three-phase separation area and an effluent weir at the upper part are positioned in the middle, and a gas chamber is arranged around the three-phase separation area; circulating water distribution pipes are evenly arranged on the top of the reactor, high-concentration industrial wastewater is mixed with circulating water, then distributed through the circulating water distribution pipes, ascends to a three-phase separation area along the reactor, is separated from water, gas and mud, and is collected and discharged from an effluent weir on the upper portion of the three-phase separator. Marsh gas generated by anaerobic treatment is collected by a gas collecting chamber located in the middle of the three-phase separation area and conveyed to a gas chamber to be discharged, and sludge falls into the rising reaction area after being separated and continuously rises and falls to continue to participate in the anaerobic treatment process of the wastewater. The UASB anaerobic reactor is reasonable in structure, good in high-concentration industrial wastewater pretreatment effect and convenient to use, and is a new thought for design of the UASB anaerobic reactor.

Description

Technical Field

[0001] The utility model relates to the field of industrial wastewater treatment, in particular to a UASB pretreatment device used in a high-concentration industrial wastewater zero-discharge process. Background Art

[0002] Industrial wastewater refers to wastewater and waste liquid discharged from various processes in the industrial production process, which contains industrial production materials, intermediate products, by-products and pollutants generated in the production process that are lost with water. Industrial wastewater is an important cause of environmental pollution, especially water pollution. With the increasingly stringent environmental protection requirements, the treatment idea of ​​zero discharge of high-concentration industrial wastewater has gradually attracted the attention of various sewage discharge enterprises. At present, high-concentration industrial wastewater generally has the problems of great difficulty in treatment and poor biodegradability. It cannot be directly treated using conventional A / O processes. Various pretreatment facilities need to be added at the front end. Anaerobic treatment is one of the pretreatment methods, which can effectively improve the biodegradability of water bodies and create favorable conditions for subsequent degradation processes. However, this type of equipment often has the problems of difficulty in slag discharge and the water outlet is easily blocked by sludge. Therefore, it is necessary to design a UASB pretreatment equipment that is practical and easy to operate for the zero discharge process of high-concentration industrial wastewater. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a UASB pretreatment device which is highly practical and easy to operate and is used in the zero-discharge process of high-concentration industrial wastewater.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is:

[0005] A UASB pretreatment device for high-concentration industrial wastewater zero-discharge process comprises a reactor with a shell structure, wherein an ascending reaction zone, a three-phase separation zone and a water outlet weir are arranged from bottom to top in the reactor, wherein the outer periphery of the three-phase separation zone and the water outlet weir is a biogas chamber, and the three-phase separation zone is connected to the biogas chamber.

[0006] As an embodiment of the utility model, the three-phase separation zone includes a three-phase separator and a gas collecting chamber. A plurality of the three-phase separators are arranged alternately on both sides of the gas collecting chamber and pass through the three-phase separation zone. An air guide pipe is provided on the upper part of the gas collecting chamber, and two of the air guide pipes are connected to the biogas chamber.

[0007] As an embodiment of the utility model, the three-phase separator is arranged in an inverted V shape with an opening downward, one end of which is connected to the gas collecting chamber, and the other end extends outwardly and downwardly inclined to the end of the three-phase separation zone.

[0008] As an embodiment of the utility model, circulating water distribution pipes are evenly arranged on the top of the reactor, and the inner end interface of the circulating water distribution pipe is provided with a stainless steel short pipe and a connecting hose. One end of the connecting hose is sleeved on the stainless steel short pipe, and the other end is downwardly connected to the bottom of the reactor for uniform water distribution. The free end of the bottom of the connecting hose is sleeved with a stainless steel anchoring pipe for gravity anchoring the connecting hose.

[0009] As an implementation mode of the utility model, the external interface of the circulating water distribution pipe is connected to a vertical tee, the top of the vertical tee is a flange blind plate, the side is a water inlet for circulating water, and the bottom is fixedly connected to the stainless steel short pipe. Enlarged flanges are fixedly provided on the vertical tee and the stainless steel short pipe. The enlarged flanges are used in pairs and connected by bolts. A stainless steel protective tube is fixedly provided at the bottom of the enlarged flange below. The stainless steel protective tube is sleeved on the outside of the stainless steel short pipe to protect and fix the internal stainless steel short pipe and the connecting hose.

[0010] As an embodiment of the utility model, a guide steel wire rope is arranged along the connecting hose, the guide steel wire rope is inserted into the connecting hose and passes through the connecting hose, the upper end of the guide steel wire rope is connected and fixed to the steel ring of the flange blind plate, and the lower end is connected and fixed to the steel ring at the bottom of the reactor.

[0011] As an embodiment of the utility model, an air chamber flushing port is provided on the top of the reactor, and two of the air chamber flushing ports are symmetrically arranged above the biogas chamber. A bend flange is fixedly installed on the air chamber flushing port by bolts, and the bend flange is provided with a stainless bend pipe with a bend nozzle. The stainless bend pipe is inserted into the air chamber flushing port, and the direction of the bend nozzle can be rotated by adjusting the installation angle of the bend flange.

[0012] As an embodiment of the utility model, the upper part of the reactor side wall is provided with a scum mud discharge pipe, a circulating pump inlet and an outlet pipe, the lower part of the side wall is provided with a liquid level meter port, a sampling tube and a mud discharge port, and the top is provided with a biogas port and a spare port.

[0013] As an implementation mode of the utility model, a plurality of sampling tubes with different sampling heights are arranged in the reactor, and the sampling outlets thereof all pass through the reactor, are arranged on the outside of the side wall and are equipped with valves.

[0014] As an embodiment of the utility model, two manholes are provided on the top of the reactor, which are respectively connected to the water outlet weir and the biogas chamber, one manhole is provided on the upper and lower parts of the side wall respectively, a ladder is provided outside the side wall, and fences are provided on the upper and top parts respectively.

[0015] The beneficial effects of adopting the above technical solution are:

[0016] The utility model provides a UASB pretreatment equipment for high-concentration industrial wastewater zero-discharge process. The lower part of the reactor is provided with a rising reaction zone, the upper part is provided with a combination area of ​​a three-phase separation zone, a water outlet weir and a gas chamber, and a circulating water distribution pipe is evenly arranged on the top of the reactor. After the high-concentration industrial wastewater is mixed with circulating water, it is distributed from the bottom through the circulating water distribution pipe, and then rises along the reactor to the three-phase separation zone. After the water, gas and mud are separated, the drainage is collected from the water outlet weir. The biogas produced by anaerobism is collected and discharged through the gas collection chamber, and the sludge falls to the rising reaction zone after separation, and continues to rise and fall to participate in the anaerobic treatment process of the wastewater. The application has a reasonable structure, and utilizes a specially arranged circulating water distribution pipe, as well as a special structural arrangement of a three-phase separation zone and a biogas chamber to solve the problems of difficult handling of scum and easy clogging of water outlets in conventional UASB equipment. At the same time, multiple sampling ports are arranged to facilitate sampling at multiple heights, which provides convenience for the detection work during operation and debugging. It has a good pretreatment effect on high-concentration industrial wastewater, is easy to use, install and maintain, and is a new idea for the design of UASB anaerobic reactors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front structural cutaway diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the air chamber flushing port of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the circulating water distribution pipe of the utility model;

[0021] Figure 5 It is a front view structural schematic diagram of the three-phase separation zone of the utility model;

[0022] Figure 6 It is a side view structural schematic diagram of the three-phase separation zone of the utility model;

[0023] Figure 7 It is a schematic diagram of the top view structure of the three-phase separation zone of the utility model.

[0024] in:

[0025] 100, reactor; 200, ascending reaction zone; 300, three-phase separation zone; 400, outlet weir; 500, biogas chamber;

[0026] 1. Three-phase separator; 1-1. Air chamber flushing port; 1-1-1. Elbow flange; 1-1-2. Stainless steel elbow; 1-1-3. Elbow nozzle; 1-2. Scum discharge pipe; 1-3. Circulating pump water inlet; 1-4. Water outlet; 1-5. Liquid level gauge port; 1-6. Sampling tube; 1-6-1. Valve; 1-7. Biogas port; 1-8. Spare port; 1-9. Manhole; 1-10. Mud discharge port; 2. Gas collecting chamber; 2-1. Air guide pipe; 3. Circulating water distribution pipe; 3-1. Stainless steel short pipe; 3-2. Connecting hose; 3-3. Stainless steel anchor pipe; 3-4. Vertical tee; 3-4-1. Flange blind plate; 3-5. Enlarged flange; 3-6. Stainless steel protection pipe; 3-7. Guide wire rope; 3-8. Steel ring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model is clearly and completely described below in conjunction with specific embodiments.

[0028] like Figures 1 to 7 The UASB pretreatment equipment for high-concentration industrial wastewater zero-discharge process shown in the figure includes a shell structure reactor 100, in which an ascending reaction zone 200, a three-phase separation zone 300 and a water outlet weir 400 are arranged from bottom to top, and the outer periphery of the three-phase separation zone 300 and the water outlet weir 400 is a biogas chamber 500, and the three-phase separation zone 300 is connected to the biogas chamber 500. The three-phase separation zone 300 includes a three-phase separator 1 and a gas collecting chamber 2, and a plurality of three-phase separators 1 are arranged alternately on both sides of the gas collecting chamber 2 and pass through the three-phase separation zone 300, and an air guide pipe 2-1 is arranged on the upper part of the gas collecting chamber 2, and the two air guide pipes 2-1 are connected to the biogas chamber 500. The three-phase separator 1 is set in an inverted V shape with an opening downward, one end of which is welded on the gas collecting chamber 2, and the other end is inclined outward and downward to extend to the end of the three-phase separation zone 300. The welding area on the gas collecting chamber 2 and the part located within the angle of the three-phase separator 1 are provided with openings to facilitate the collection of separated gases into the gas collecting chamber 2. The top of the reactor 100 is evenly arranged with a circulating water distribution pipe 3. After the high-concentration industrial wastewater is mixed with circulating water, it is evenly distributed in the reactor 100 from the circulating water distribution pipe 3. The wastewater rises along the reactor 100 to the three-phase separation zone 300, and after the water, gas and mud are separated, it is collected and discharged from the water outlet weir 400 at the top of the three-phase separator 1. The biogas produced by anaerobism is collected by the gas collecting chamber 2 located in the middle of the three-phase separation zone 300 and transported to the biogas chamber 500 outside the three-phase separation zone 300 for discharge. After the sludge is separated, it falls to the rising reaction zone 200, and continuously rises and falls to participate in the anaerobic treatment process of the wastewater.

[0029] like Figure 1 , Figure 2 and Figure 4As shown, in the embodiment of the present application, the number of circulating water distribution pipes 3 is set to 12, and the inner end interface of the circulating water distribution pipe 3 is provided with a stainless steel short pipe 3-1 and a connecting hose 3-2. One end of the connecting hose 3-2 is sleeved on the stainless steel short pipe 3-1 and fixed by a plurality of pipe clamps, and the other end is downwardly connected to the bottom of the reactor 100 for uniform water distribution. The free end of the bottom of the connecting hose 3-2 is sleeved with a stainless steel anchoring pipe 3-3 connected and fixed by a plurality of pipe clamps, and the stainless steel anchoring pipe 3-3 is used for gravity anchoring of the connecting hose 3-2. The external interface of the circulating water distribution pipe 3 is connected to the vertical tee 3-4. The top of the vertical tee 3-4 is a flange blind plate 3-4-1. The inner side of the flange blind plate 3-4-1 has a steel ring 3-8. The side is the water inlet of the circulating water. The bottom is fixedly connected to the stainless steel short pipe 3-1. The vertical tee 3-4 and the stainless steel short pipe 3-1 are fixedly provided with an enlarged flange 3-5. The enlarged flange 3-5 is used in pairs and connected by bolts. A stainless steel protective pipe 3-6 is fixedly provided at the bottom of the enlarged flange 3-5 below. The stainless steel protective pipe 3-6 is mounted on the outside of the stainless steel short pipe 3-1 to protect and fix the internal stainless steel short pipe 3-1 and the connecting hose 3-2. A guide wire rope 3-7 is arranged along the connecting hose 3-2, and the guide wire rope 3-7 is inserted into and penetrates the connecting hose 3-2. The upper end of the guide wire rope 3-7 is connected and fixed to the steel ring 3-8 of the flange blind plate 3-4-1, and the lower end is connected and fixed to the steel ring 3-8 at the bottom of the reactor 100. When the lower end of the connecting hose 3-2 is clogged with sludge, the vertical tee 3-4 is removed at the top of the reactor 100 to drag the connecting hose 3-2 out for cleaning. After cleaning, the connecting hose 3-2 can be installed back to the original water distribution position along the guide wire rope 3-7.

[0030] like Figures 1 to 3 As shown, an air chamber flushing port 1-1 is provided on the top of the reactor 100, and two air chamber flushing ports 1-1 are symmetrically arranged above the biogas chamber 500. An elbow flange 1-1-1 is fixedly installed on the air chamber flushing port 1-1 by bolts. The elbow flange 1-1-1 is provided with a stainless elbow 1-1-2 with a bend 1-1-3. The stainless elbow 1-1-2 is sleeved in the air chamber flushing port 1-1. The direction of the bend 1-1-3 can be rotated by adjusting the installation angle of the elbow flange 1-1-1. When serious scum accumulation occurs, it can be flushed and cleaned through the flushing port.

[0031] The upper part of the side wall of the reactor 100 is provided with a scum mud discharge pipe 1-2, a circulating pump water inlet 1-3 and a water outlet pipe 1-4, and the lower part of the side wall is provided with a liquid level gauge port 1-5, a sampling tube 1-6 and a mud discharge port 1-10. The liquid level gauge port 1-5 can monitor the water level, and the mud discharge port 1-10 discharges the remaining sludge; the top is provided with a water outlet weir 400, a biogas port 1-7 and a spare port 1-8. The water outlet weir 400 is arranged in the middle position of the top of the reactor 100, above the three-phase separation zone 300. The water outlet weir 400 is made of stainless steel and is equipped with a water outlet trough. The appropriate position of the water outlet trough is connected to a downwardly inclined water outlet pipe 1-4. The water outlet pipe 1-4 passes through the biogas chamber 500 to the outside of the reactor 100, and the effluent is discharged by gravity. A plurality of sampling tubes 1-6 with different sampling heights are arranged in the reactor 100, and the sampling outlets thereof all pass through the reactor 100 and are arranged on the outside of the side wall and are installed with valves 1-6-1. The embodiment of the present application is provided with four sampling ports, which can be used to sample and analyze water samples at different heights in different stages of equipment commissioning and operation to guide operation.

[0032] Two manholes 1-9 are provided on the top of the reactor 100, which are connected to the outlet weir 400 and the biogas chamber 500 respectively. A manhole 1-9 is provided on the upper and lower parts of the side wall respectively. The upper manhole 1-9 is connected to the biogas chamber 500, and the lower manhole 1-9 is connected to the rising reaction zone 200 to meet the maintenance needs of different parts. A ladder is provided outside the side wall of the reactor 100, and the ladder is connected from the bottom to the fences provided on the upper and top parts respectively.

[0033] The equipment in this application has good effect in treating high-concentration industrial wastewater:

[0034] Case 1: This equipment was used to treat high-concentration pharmaceutical wastewater in Hebei Province, with COD=5600mg / L, BOD5=1120mg / L, BOD / COD=0.2, and pH=3~6. Zero discharge of wastewater was required, and this equipment was used to pre-treat the pharmaceutical wastewater, with the reaction temperature maintained at around 35°C. After the wastewater pH was adjusted to around 7, it was mixed with circulating water and then evenly entered the bottom of the equipment through the 12 circulating water outlets at the top of the equipment. It rose vertically in the rising reaction zone of the equipment, and during the rising process, it was hydrolyzed and acidified by anaerobic granular sludge, produced hydrogen and acetic acid, and produced methane, and finally the difficult-to-degrade organic matter was anaerobic biodegraded. The muddy-water mixture after the reaction rises to the middle three-phase separation zone, where the solid sludge settles and sinks at the position of the three-phase separator and returns to the rising reaction zone; after the biogas is separated and collected by the three-phase separator, it is concentrated in the middle gas collecting chamber and transported to the gas chamber outside the three-phase separation zone through the air guide pipe; the wastewater with separated gas and solid continues to rise to the outlet weir at the top of the three-phase separation zone and is collected and discharged through the drainage trough. After treatment, the outlet COD=4200mg / L, BOD5=1500mg / L, BOD5 / COD=0.36, and the biodegradability is improved, which can enter the subsequent A / O+ concentration treatment unit for further treatment.

[0035] Case 2: This equipment was used to treat a printing and dyeing wastewater in Zhejiang Province. COD=4000mg / L, BOD5=1000mg / L, BOD / COD=0.25, pH=6~10. Zero discharge of wastewater was required. This equipment was used to pre-treat the pharmaceutical wastewater, and the reaction temperature was maintained at about 35°C. After the wastewater pH was adjusted to about 7, it was mixed with circulating water and evenly entered the bottom of the equipment through the 12 circulating water distribution ports at the top of the equipment. It rose vertically in the rising reaction zone of the equipment. During the rising process, the anaerobic granular sludge was hydrolyzed and acidified, hydrogen and acetic acid were produced, and methanogens were produced, and finally the difficult-to-degrade organic matter was anaerobic biodegraded. The muddy-water mixture after the reaction rises to the middle three-phase separation zone, where the solid sludge settles and sinks at the position of the three-phase separator and returns to the rising reaction zone; after the biogas is separated and collected by the three-phase separator, it is concentrated in the middle gas collecting chamber and transported to the gas chamber outside the three-phase separation zone through the air guide pipe; the wastewater with separated gas and solid continues to rise to the outlet weir at the top of the three-phase separation zone and is collected and discharged through the drainage trough. After treatment, the outlet COD=3000mg / L, BOD5=1150mg / L, BOD5 / COD=0.38, and the biodegradability is improved, which can enter the subsequent biochemical unit for further treatment.

[0036] Case 3: This equipment was used to treat a pesticide wastewater in Jiangsu, COD = 18000mg / L, BOD5 = 2000mg / L, BOD / COD = 0.11, pH = 6.8~8.5, and zero discharge of wastewater was required. This equipment was used to pre-treat the pharmaceutical wastewater, and the reaction temperature was maintained at about 35°C. After the wastewater pH was adjusted to about 7, it was mixed with circulating water and evenly entered the bottom of the equipment through the 12 circulating water distribution ports located at the top of the equipment. It rose vertically in the rising reaction zone of the equipment. During the rising process, the anaerobic granular sludge was hydrolyzed and acidified, hydrogen and acetic acid were produced, and methanogens were produced, and finally the difficult-to-degrade organic matter was anaerobic biodegraded. The mud-water mixture after the reaction rises to the middle three-phase separation zone, where the solid sludge settles and sinks at the position of the three-phase separator and returns to the rising reaction zone; after the biogas is separated and collected by the three-phase separator, it is concentrated in the middle gas collecting chamber and transported to the gas chamber outside the three-phase separation zone through the air guide pipe; the wastewater with separated gas and solid continues to rise to the outlet weir at the top of the three-phase separation zone and is collected and discharged through the drainage trough. After the wastewater is treated, the outlet COD=95000mg / L, BOD=3000mg / L, BOD5 / COD=0.31, and the biodegradability is improved, so it can enter the subsequent biochemical unit for further treatment.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A UASB pretreatment device for high-concentration industrial wastewater zero-discharge process, characterized by: It comprises a reactor (100) of a shell structure, wherein an ascending reaction zone (200), a three-phase separation zone (300) and a water outlet weir (400) are arranged from bottom to top in the reactor (100), the outer periphery of the three-phase separation zone (300) and the water outlet weir (400) is a biogas chamber (500), and the three-phase separation zone (300) is connected to the biogas chamber (500); A circulating water distribution pipe (3) is evenly arranged at the top of the reactor (100); a stainless steel short pipe (3-1) and a connecting hose (3-2) are provided at the inner end interface of the circulating water distribution pipe (3); one end of the connecting hose (3-2) is sleeved on the stainless steel short pipe (3-1), and the other end is connected downward to the bottom of the reactor (100) for even water distribution; The external interface of the circulating water distribution pipe (3) is connected to a vertical tee (3-4); the top of the vertical tee (3-4) is a flange blind plate (3-4-1), the side is a water inlet for circulating water, and the bottom is fixedly connected to the stainless steel short pipe (3-1); A guide steel wire rope (3-7) is arranged along the connecting hose (3-2), the guide steel wire rope (3-7) is inserted into the connecting hose (3-2) and passes through the connecting hose (3-2), the upper end of the guide steel wire rope (3-7) is connected and fixed to the steel ring (3-8) of the flange blind plate (3-4-1), and the lower end is connected and fixed to the steel ring (3-8) at the bottom of the reactor (100).

2. The UASB pretreatment equipment for high-concentration industrial wastewater zero-discharge process according to claim 1, characterized in that: The three-phase separation zone (300) comprises a three-phase separator (1) and a gas collecting chamber (2); a plurality of the three-phase separators (1) are arranged alternately on both sides of the gas collecting chamber (2) and pass through the three-phase separation zone (300); an air guide pipe (2-1) is provided at the top of the gas collecting chamber (2); two of the air guide pipes (2-1) are connected to the biogas chamber (500).

3. The UASB pretreatment equipment for high-concentration industrial wastewater zero-discharge process according to claim 2, characterized in that: The three-phase separator (1) is arranged in an inverted V shape with its opening downward, one end of which is connected to the gas collecting chamber (2), and the other end of which extends outwardly and downwardly in an inclined manner to the end of the three-phase separation zone (300).

4. The UASB pretreatment equipment for high-concentration industrial wastewater zero-discharge process according to claim 1, characterized in that: A stainless steel anchoring pipe (3-3) is sleeved on the free end of the bottom of the connecting hose (3-2) and is used for gravity anchoring the connecting hose (3-2).

5. The UASB pretreatment equipment for high-concentration industrial wastewater zero-discharge process according to claim 1, characterized in that: An enlarged flange (3-5) is fixedly arranged on the vertical tee (3-4) and the stainless steel short pipe (3-1); the enlarged flanges (3-5) are used in pairs and connected by bolts; a stainless steel protection pipe (3-6) is fixedly arranged at the bottom of the lower enlarged flange (3-5); the stainless steel protection pipe (3-6) is sleeved on the outside of the stainless steel short pipe (3-1) and is used to protect and fix the stainless steel short pipe (3-1) and the connecting hose (3-2) inside.

6. The UASB pretreatment equipment for high-concentration industrial wastewater zero-discharge process according to claim 1, characterized in that: The reactor (100) is provided with an air chamber flushing port (1-1) at the top, and two of the air chamber flushing ports (1-1) are symmetrically arranged above the biogas chamber (500). A pipe bend flange (1-1-1) is fixedly mounted on the air chamber flushing port (1-1) by means of bolts, and the pipe bend flange (1-1-1) is provided with a stainless pipe bend (1-1-2) with a bend nozzle (1-1-3). The stainless pipe bend (1-1-2) is sleeved in the air chamber flushing port (1-1), and the direction of the bend nozzle (1-1-3) can be rotated by adjusting the installation angle of the pipe bend flange (1-1-1).

7. The UASB pretreatment equipment for high-concentration industrial wastewater zero-discharge process according to claim 1, characterized in that: The reactor (100) is provided with a scum discharge pipe (1-2), a circulating pump water inlet (1-3) and a water outlet pipe (1-4) at the upper part of the side wall, a liquid level gauge port (1-5), a sampling tube (1-6) and a sludge discharge port (1-10) at the lower part of the side wall, and a biogas port (1-7) and a spare port (1-8) at the top.

8. The UASB pretreatment equipment for high-concentration industrial wastewater zero-discharge process according to claim 7, characterized in that: The plurality of sampling tubes (1-6) with different sampling heights are arranged in the reactor (100), and the sampling outlets thereof all pass through the reactor (100), are arranged on the outside of the side wall and are equipped with valves (1-6-1).

9. The UASB pretreatment equipment for high-concentration industrial wastewater zero-discharge process according to claim 1, characterized in that: The reactor (100) is provided with two manholes (1-9) at the top thereof, which are respectively connected to the water outlet weir (400) and the biogas chamber (500), and one manhole (1-9) is respectively provided at the upper and lower parts of the side wall, a ladder is provided outside the side wall, and fences are respectively provided at the upper and top parts.

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