CN216711714U

CN216711714U - Water distribution pipe system for treating UASB (upflow anaerobic sludge blanket) system in leachate

Info

Publication number: CN216711714U
Application number: CN202122902220.1U
Authority: CN
Inventors: 熊启明; 盛鹏飞; 邹聪; 袁洁珊
Original assignee: Guangzhou Huantou Design And Research Institute Co ltd
Current assignee: Guangzhou Huantou Design And Research Institute Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-06-10
Anticipated expiration: 2031-11-24

Abstract

The utility model relates to a water distribution pipe system of an UASB system for treating percolate, which is used for treating garbage percolate and discloses that a water inlet pipe extends from the outside of a reaction tank to the top of the reaction tank, bends after extending to the top in the reaction tank and then vertically extends to the bottom of the reaction tank, a return pipe is connected on the water inlet pipe in the reaction tank, the other end of the return pipe passes through the reaction tank and is connected with the water inlet pipe outside the reaction tank, a circulating water pump is arranged on the return pipe, the water inlet pump is arranged at the front end of the water inlet pipe, and a valve is arranged on the section of the water inlet pipe bending in the reaction tank. The utility model has the advantages of improving the working efficiency of solving the pipeline blockage, reducing the cost of manpower and material resources consumed for solving the pipeline dredging, and avoiding the environmental protection problem caused by pool cleaning and sewage transfer.

Description

Water distribution pipe system for treating UASB (upflow anaerobic sludge blanket) system in leachate

Technical Field

The utility model relates to a water distribution pipe system of a UASB system for treating percolate, which is particularly suitable for treating high-concentration sewage which is easy to pollute and block, and is particularly suitable for a pipe distribution mode of water inlet and circulating water distribution of the UASB system in the treatment of landfill percolate.

Background

In the landfill leachate treatment process, wastewater is introduced into the bottom of the UASB reactor as uniformly as possible, and the wastewater passes upward through a sludge bed containing granular sludge or flocculent sludge. The anaerobic reaction occurs during the contact of the wastewater with the sludge particles. Biogas (mainly methane and carbon dioxide) produced under anaerobic conditions causes internal circulation, which is beneficial for the formation and maintenance of granular sludge. Some of the gas formed in the sludge blanket adheres to the sludge particles, and the adhering and non-adhering gas rises toward the top of the reactor. The sludge rising to the surface strikes the bottom of the gas emitter of the three-phase reactor, causing degassing of the sludge flocs adhering to the bubbles. Sludge particles will settle to the surface of the sludge bed after the bubbles are released, and the attached and unattached gases are collected in the gas collection chamber of the triphase separator at the top of the reactor. The baffle placed under the extremely tight cell gap acts as a gas emitter and prevents the biogas bubbles from entering the settling zone, which would otherwise cause flocculation in the settling zone, which would hinder particle settling. The liquid containing some remaining solids and sludge particles passes through the separator gap into the settling zone. The upward flow velocity decreases near the discharge point, since the flow area of the inclined wall settling zone of the separator increases near the water surface. Sludge flocs can flocculate and settle in the settling zone due to the reduced flow rate. Sludge flocs accumulated on the three-phase separator will to some extent exceed the friction it holds on the sloped wall, and will slide back into the reaction zone, which in turn will react with the influent organic matter. The treatment structure has the defects that the components in the landfill leachate are complex, mainly comprise solid suspended matters, a large amount of organic matters and inorganic salt, and are easy to scale and block pipelines. According to the anaerobic process principle, sewage needs to enter an anaerobic system from the bottom, so when a pipeline behind an inlet valve (12) of the anaerobic system is scaled, an anaerobic tank (the conventional single tank is arranged at 4000 m)³Left and right) the mixture of the internal muddy water is completely pumped and then a repairman is sent to enter the dredging pipe in the pool under the condition of safe ventilationAnd finally, injecting water and culturing microorganisms into the anaerobic tank, so that a large amount of manpower and material resources are consumed, and the consumed time is about 1-2 months, which seriously influences the normal operation of the power plant.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a water distribution pipe system of an UASB system for treating percolate, which can greatly improve the maintenance convenience and save the maintenance cost by the pipe distribution design of a top-down return pipe and a return pipe.

The technical scheme of the utility model is that the device comprises a sludge bed, a suspended sludge layer, an air chamber, a gas baffle, a water distribution system, a settling zone, a water outlet tank, a gas collecting hood, a water seal, a circulating water pump, a water inlet pump, a valve, a water inlet pipe and a reaction tank.

The reflux pipeline is arranged in the reaction tank and is not more than one third of the total height of the reaction tank from the top of the reaction tank to the bottom.

The valve arranged on the section of the water inlet pipe which is bent towards the inside of the reaction tank on the water inlet pipe is a main valve of the water inlet pipe, the water inlet pipe which vertically extends towards the bottom of the reaction tank in the reaction tank is not less than one branch water inlet pipe which is connected in parallel and extends downwards to a position 0.8 meter away from the bottom of the reaction tank, each branch water inlet pipe is independently provided with a valve, and the circulating water pump on the return pipe is connected with the valve and the flowmeter in series and arranged on the return pipe.

When the problem of pipeline blockage is found according to the working principle of the utility model, the circulating water pump is closed, the water inlet pump is closed, the top valve is closed, then the pipeline behind the valve is disassembled, the pipeline is drawn out from the top, and finally the pipeline is dredged. The dredged pipeline firstly extends into the bottom of the pool according to the original path, then is installed according to the original state, and finally the valve is opened, the water inlet pump is opened, and the circulating water pump is opened. The circulating pump adjusts the hydraulic load through the interaction of the flowmeter and the frequency converter for controlling the circulating pump, so that the sewage treatment effect is changed, and the whole maintenance process normally consumes about 2-3 hours.

The utility model has the advantages of improving the working efficiency of solving the pipeline blockage, reducing the cost of manpower and material resources consumed for solving the pipeline dredging, and avoiding the environmental protection problem caused by pool cleaning and sewage transfer.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Detailed Description

According to the utility model, as shown in figure 1, on the basis of a sludge bed 1, a suspended sludge layer 2, an air chamber 3, a gas baffle plate 4, a water distribution system 5, a settling zone 6, a water outlet tank 7, a gas collecting hood 8, a water seal 9, a circulating water pump 10, a water inlet pump 11, a valve 12, a water inlet pipe 13, a reaction tank 14 and a flowmeter 15, the utility model is characterized in that the water inlet pipe 13 extends from the outside of the reaction tank 14 to the top of the reaction tank 14, is bent at a right angle in the reaction tank 14 after extending to the top and then vertically extends to the bottom of the reaction tank 14, a return pipe is connected to the water inlet pipe in the reaction tank 14, the other end of the return pipe penetrates through the reaction tank to be connected with the water inlet pipe outside the reaction tank, the circulating water pump 10 is arranged on the return pipe, the water inlet pump 11 is arranged at the front end of the water inlet pipe, and the valve 12 is arranged on the section of the water inlet pipe bent in the reaction tank. The backflow pipeline is arranged in the reaction tank and is downwards positioned at one third of the total height of the reaction tank from the top of the reaction tank. The valve 12 installed on the section of the inlet pipe which is bent towards the inside of the reaction tank on the inlet pipe 13 is a main valve of the inlet pipe, the inlet pipe which vertically extends towards the bottom of the reaction tank in the reaction tank is formed by connecting four branch inlet pipes in parallel and downwardly extending to a position 0.8 meter away from the bottom of the reaction tank 14, the valve 12.1 is independently installed on each branch inlet pipe, and the circulating water pump 10 on the return pipe is installed on the return pipe in series with the valve 12.2 and the flowmeter 15.

Claims

1. The utility model provides a water distributor system for handling UASB system in filtration liquid, it includes the sludge bed, the suspended sludge layer, the air chamber, the gas plate washer, water distribution system, the settling zone, go out the basin, the gas collecting channel, the water seal, circulating water pump, the intake pump, the valve, the inlet tube, the reaction tank, the flowmeter, characterized by inlet tube extends to the reaction tank top from the reaction tank is outside, extend to the top and then extend to the reaction tank bottom perpendicularly to crooked in the reaction tank after the top, be connected with the backward flow pipeline on the inlet tube in the reaction tank, the backward flow pipeline other end passes the reaction tank and connects the outer inlet tube of reaction tank, be provided with circulating water pump on the backward flow, the front end at the inlet tube is installed to the intake pump, install the valve on the section inlet tube crooked in the reaction tank.

2. A water distributor system for UASB systems for the treatment of leachate according to claim 1 wherein the return line is located within the reaction tank no more than one third of the total height of the reaction tank down from the top of the reaction tank.

3. The water distributor system according to claim 1, wherein the valve installed on the portion of the inlet pipe that is bent toward the inside of the reaction tank on the inlet pipe is a main valve of the inlet pipe, the inlet pipe vertically extending toward the bottom of the reaction tank in the reaction tank is at least one branch inlet pipe, which is connected in parallel and extends downward to a distance of 0.8 m from the bottom of the reaction tank, each branch inlet pipe is independently installed with a valve, and the circulating water pump on the return pipe is installed in series with the valve and the flow meter on the return pipe.