CN202246251U

CN202246251U - Internal circulation upflow anaerobic sludge bed (UASB) reactor for improving waste water treatment efficiency

Info

Publication number: CN202246251U
Application number: CN2011204190897U
Authority: CN
Inventors: 宋宏杰; 吴连成; 孔德芳; 王惠英; 邵玉敏
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2011-10-28
Filing date: 2011-10-28
Publication date: 2012-05-30
Anticipated expiration: 2021-10-28

Abstract

The utility model relates to an internal circulation upflow anaerobic sludge bed (UASB) reactor for improving the waste water treatment efficiency. The internal circulation UASB reactor can effectively solve the problems to realize the effects that the temperature and the pH value in the reaction process are simply regulated at low cost, particle sludge is fast obtained, the sludge and the water are sufficiently mixed, and the sewage purification efficiency is improved. The internal circulation UASB reactor is structurally characterized in that a particle sludge bed, an air collection chamber and a sludge precipitating region are sequentially arranged in a reactor body from bottom to top, the bottom of the particle sludge bed is provided with a water inlet pipe, a water inlet pump is connected with a water distributor through the water inlet pipe, a sludge back flow seam is arranged under the air collection chamber along the inside of the reactor body, an air collection cover arranged on the air collection chamber is connected with an air collection pipe, the air collection pipe is connected with a water seal, the sludge precipitating region is arranged above the air collection chamber, the lower part of the air collection chamber is provided with a back flow pipe connected with the back flow pump, the back flow pump is connected with the water inlet pipe, a sampling pipe is arranged on the reactor body, a water outlet pipe is arranged at the lower end of a water collection tank arranged at the outer side of the upper end of the sludge precipitating region, and a flow dividing plate is arranged on the inner wall of the reactor body. The internal circulation UASB reactor has the advantages that the waste water treatment stability is good, the organic matter removal rate is high, and the starting time is short.

Description

Improve the internal recycle UASB reactor drum of waste water treatment efficiency

Technical field

The utility model relates to sewage treatment equipment, particularly utilizes a kind of internal recycle UASB reactor drum that improves waste water treatment efficiency of forcing internal recycle to improve waste water treatment efficiency.

Background technology

The Anaerobic Microbiological Treatment Technology of waste water is meant under anaerobic, and amphimicrobian and anaerobion colony are converted into the process of methane and carbonic acid gas with organism, are called anaerobic digestion again.It has the volumetric loading height, device structure is simple, running maintenance is convenient, floor space is little, need not stirring and aeration, energy consumption is low, excess sludge is few, generate renewable energy source advantages such as (CH4).Anaerobic Microbiological Treatment Technology obtains application more and more widely at home and abroad owing to have good removal effect and the speed of reaction of Geng Gao in the wastewater treatment.

Up-flow anaerobic sludge blanket (or is claimed upflow anaerobic sludge blanket process Up-flow Anaerobic Sludge Bed; Often be abbreviated as UASB, all adopt UASB among the application, as follows) reactor drum is a kind of typical anaerobic waste water biologic treating technique; Since twentieth century is invented the seventies; The UASB reactor drum is mainly used in treatment of high concentration organic waste water, has obtained tremendous development through updating in recent years, has become one of major technique of domestic and international anaerobic waste water processing.Traditional U ASB comprises into water and water dispensing apparatus, reactor body and granular mud bed, triphase separator, water outlet and water seal; The main processing process of UASB is: pending waste water is through the bottom of water inlet and water dispensing apparatus entering UASB reactor drum, and water inlet has certain upper reaches speed, the Sludge Bed of upwards flowing through and being made up of particulate state or floc sludge; Waste water contacts with Sludge Bed and anaerobic reaction takes place and produce biogas (mainly being methane and carbonic acid gas); Biogas rises and causes the Sludge Bed disturbance and drive granule sludge or the floc sludge rising, and under the effect of triphase separator, granule sludge is able to descend; Get back to the Sludge Bed zone; Thereby the circulating inside of formation granule sludge, waste water is through quiet heavy by the water outlet discharge, and the biogas that is produced process triphase separator is after water seal is collected utilization again.

This traditional U ASB reactor drum is in operation and has following problem:

1, poor to the ability of regulation and control of pH value and temperature in the UASB reactor drum, and capacity of resisting impact load is relatively poor.Organic decomposition mainly is divided into three phases in the UASB reactor drum: hydrolysis stage, product hydrogen produce the acetate stage and produce methane phase; Accomplish by hydrolysis bacterium, product hydrogen acid-producing bacteria and the methanogen of correspondence respectively; Wherein hydrolysis is very fast with the reaction of producing hydrogen product two stages of acetate, thus produce the speed that the speed of methane phase has determined entire reaction course, and the optimal ph of methanogen is 6.5 ~ 7.8; Optimum temps is 35 ~ 40 ℃; Waste water is difficult to satisfy these conditions generally speaking, and this just requires waste water to get into the accurate adjusting that the UASB reactor drum need carry out acidity and temperature before, and this is the comparison difficulty in the actual motion management.The actual waste water influent quality often fluctuates very big, but traditional U ASB capacity of resisting impact load is relatively poor.

2, under the certain condition of UASB volumetric loading and influent concentration; The flooding quantity of UASB is confirmed; The inner upflow velocity of UASB is also confirmed like this, and inside reactor the muddy water undermixing can occur, the problem at dead angle occur easily under the less situation of upflow velocity; And upflow velocity is less abundant inadequately in the disturbance of initial start stage inside reactor mud, is unfavorable for washing out and the formation of granule sludge of tiny floc sludge.

3, in the UASB initial start stage, floc sludge is more in the reactor drum, and the place is easy to generate scum silica frost at triphase separator, and then the separating effect of triphase separator mud, water, gas is bad.Therefore, its improvement and innovate imperative.

Summary of the invention

To above-mentioned situation; For overcoming the defective of prior art; The purpose of the utility model just provides a kind of internal recycle UASB reactor drum that improves waste water treatment efficiency; Can effectively solve simply, at low cost the temperature in the conditioned reaction process and pH value, obtain granule sludge and that muddy water is mixed is more abundant fast, thereby improve the problem of sewage purification processing efficiency.

The technical scheme that the utility model solves is, does further improvement on the basis to existing UASB reactor drum, comprises reactor body, intake pump, water inlet pipe, rising pipe, spreader plate and gas skirt; Be granular mud bed, collection chamber and sludge settling district from top to bottom in the reactor body, granular mud bed bottom is provided with water inlet pipe, and intake pump links to each other with water-distributing device through water inlet pipe; Be provided with mud backflow seam in the reactor body of collection chamber lower edge, gas skirt is arranged above the collection chamber, gas skirt is connected with effuser; Effuser links to each other with water seal, and the sludge settling district is arranged above the collection chamber, and the return line that links to each other with reflux pump is arranged at the collection chamber bottom; Reflux pump is connected with water inlet pipe, and stopple coupon is arranged on the reactor body, and there is water leg in the outside, upper end, sludge settling district; The water leg lower end is provided with rising pipe, on the reactor body inwall spreader plate is housed.

The utility model is through in the UASB reactor drum, below the triphase separator internal circulation system being set; To pass through return of waste water to water inlet place after Sludge Bed is handled; Can regulate water inlet pH value, temperature and COD concentration, make the operation condition more controlled and reduce the influence of impact load reactor drum; Secondly, the unlatching of internal reflux has improved the upflow velocity of inside reactor, and it is more abundant that muddy water is mixed, and promotes the formation of granule sludge; The utility model wastewater treatment stability is better, organic removal rate is higher, start time is faster.

Description of drawings

Fig. 1 is the structural profile front view of the utility model.

Embodiment

Elaborate below in conjunction with the embodiment of accompanying drawing to the utility model.

By shown in Figure 1, the utility model comprises reactor body, intake pump, water inlet pipe, rising pipe, spreader plate and gas skirt, is granular mud bed 4, collection chamber 11 and sludge settling district 13 from top to bottom in the reactor body 17; Granular mud bed bottom is provided with water inlet pipe 2, and intake pump 1 links to each other with water-distributing device 3 through water inlet pipe 2, is provided with mud backflow seam 12 in the collection chamber 11 lower edge reactor bodies; Gas skirt 14 is arranged above the collection chamber 11, and gas skirt 14 is connected with effuser 15, and effuser 15 links to each other with water seal 16; Sludge settling district 13 is arranged above the collection chamber 11, and the return line 6 that links to each other with reflux pump 7 is arranged at collection chamber 11 bottoms, and reflux pump is connected with water inlet pipe 2; Stopple coupon 5 is arranged on the reactor body; There is water leg 9 in the outside, 13 upper ends, sludge settling district, and water leg 9 lower ends are provided with rising pipe 10, on reactor body 17 inwalls spreader plate 8 are housed.

In order to guarantee result of use; Described reactor body is the cylindric of Φ 350 * 2600 mm; Angle between gas skirt 14 bottoms and datum water level is 60 °, and spreader plate 8 upper plates and sidewall angle are 30 °, and the ratio apart from a and return line 6 upper ends distance b of rising pipe 10 upper ends to the top of collection chamber 11 below return lines 6 upper ends to water inlet pipe 2 is 6 ~ 7:1; The dark direction in pond, reactor body sidewall upper edge has a plurality of thief holes that are connected with stopple coupon 5 that be arranged above and below; Flush at the bottom of the pipe of bottommost stopple coupon Yu at the bottom of the granular mud bed pond, second stopple coupon spacing on first stopple coupon of bottommost and top is 100 mm, from second stopple coupon up; The spacing of per two stopple coupons is 500 mm, upper and lower totally 5 of stopple coupon; Water inlet pipe, return line and diameter of outflow tube are 20 mm.

Can find out by said structure; The utility model is in the upflow type anaerobic sewage sludge reactor, below the triphase separator internal circulation system to be set, and makes through return of waste water to water inlet place after the Sludge Bed processing, regulates influent quality; And the upflow velocity of lifting inside reactor; And then contact with the granule sludge of inside reactor and obtain and handle, internal circulation system is for forcing internal recycle, adds pump the water of triphase separator below is evacuated to into Shui Chu; Set internal reflux pipe is located at the gap between the granular mud bed and triphase separator of reactor body, and in the water inlet pipe after the return of waste water that is refluxed to water inlet and the water dispensing apparatus, inner circulating reflux is than being adjustable, reflux ratio 50% ~ 300%.

The utility model compared with prior art has following significant technique effect:

1, the unlatching of internal reflux can improve the adaptive faculty of UASB reactor drum to water inlet pH value and temperature greatly, and pH value that UASB is intake and temperature are only done coarse adjustment and got final product; 2, internal circulation system utilizes backflow to make the up-flow constant airspeed of reactor drum down the auxiliary of additionaling power; And constant up-flow speed can keep stable expansion of Sludge Bed and stirring; Avoid producing water distribution inhomogeneous with phenomenon such as channel; Thereby significantly promote the muddy water mixing efficiency, help the formation of granule sludge, improve the anaerobic biological treatment effect; 3, the backflow of muddy water in the triphase separator can be avoided the formation of liquid level scum silica frost, reduces the mud-water separation pressure of triphase separator, improves separation efficiency; 4, can dilute water inlet COD concentration, improve impact resistance.

Claims

1. an internal recycle UASB reactor drum that improves waste water treatment efficiency comprises reactor body, intake pump, water inlet pipe, rising pipe, spreader plate and gas skirt, it is characterized in that; Be granular mud bed (4), collection chamber (11) and sludge settling district (13) from top to bottom in the reactor body (17); Granular mud bed bottom is provided with water inlet pipe (2), and intake pump (1) links to each other with water-distributing device (3) through water inlet pipe (2), is provided with mud backflow seam (12) in the reactor body of collection chamber (11) lower edge; Gas skirt (14) is arranged above the collection chamber (11); Gas skirt (14) is connected with effuser (15), and effuser (15) links to each other with water seal (16), and sludge settling district (13) is arranged above the collection chamber (11); The return line (6) that links to each other with reflux pump (7) is arranged at collection chamber (11) bottom; Reflux pump is connected with water inlet pipe (2), and stopple coupon (5) is arranged on the reactor body, and there is water leg (9) in the outside, sludge settling district (13) upper end; Water leg (9) lower end is provided with rising pipe (10), on reactor body (17) inwall spreader plate (8) is housed.

2. the internal recycle UASB reactor drum of raising waste water treatment efficiency according to claim 1 is characterized in that described reactor body is the cylindric of Φ 350 * 2600 mm.

3. the internal recycle UASB reactor drum of raising waste water treatment efficiency according to claim 1 is characterized in that, the angle between described gas skirt (14) bottom and datum water level is 60 °.

4. the internal recycle UASB reactor drum of raising waste water treatment efficiency according to claim 1 is characterized in that described spreader plate (8) upper plate and sidewall angle are 30 °.

5. the internal recycle UASB reactor drum of raising waste water treatment efficiency according to claim 1; It is characterized in that the ratio apart from a and return line (6) the upper end distance b of rising pipe (10) upper end to the top of described collection chamber (11) below return line (6) upper end to water inlet pipe (2) is 6 ~ 7:1.

6. the internal recycle UASB reactor drum of raising waste water treatment efficiency according to claim 1; It is characterized in that; The dark direction in pond, described reactor body sidewall upper edge has a plurality of thief holes that are connected with stopple coupon (5) that be arranged above and below; Flush at the bottom of the pipe of bottommost stopple coupon Yu at the bottom of the granular mud bed pond, second stopple coupon spacing on first stopple coupon of bottommost and top is 100 mm, from second stopple coupon up; The spacing of per two stopple coupons is 500 mm, upper and lower totally 5 of stopple coupon.