CN207811364U - UASB reactors - Google Patents

Abstract

The utility model discloses a UASB reactor, which comprises a tank body. The tank body includes a sludge bed, a suspension chamber and a water collection chamber connected in sequence from bottom to top. A three-phase separator is provided, and a gas collection chamber is provided on the water collection chamber, the bottom end of the gas collection chamber extends into the water collection chamber, and the upper side wall of the water collection chamber is connected to the upper side of the gas collection chamber. A water outlet pipe and an air outlet pipe are respectively connected to the wall, and a sewage uniform distribution device is provided at the bottom of the tank, and the sewage uniform distribution device communicates with the sludge bed. The utility model has the characteristics of sufficient contact reaction between sewage and anaerobic bacteria, no impurities in the collected gas, and good three-phase separation effect, and is suitable for the field of sewage treatment.

Description

UASB reactor

technical field

The utility model belongs to the field of sewage treatment equipment, in particular to a UASB reactor.

Background technique

UASB reactor is a commonly used equipment in sewage treatment process. At present, the commonly used UASB reactor is a hollow cylindrical tank. The tank is arranged in sequence from bottom to top with sludge bed, suspension chamber, three-phase separator and water collection chamber. The upper part of the water collection chamber is equipped with an outlet pipe. The bottom of the tank is connected to a water inlet pipe; the sewage is pumped into the tank from the water inlet pipe through the water inlet pump, and then the sewage is in contact with the anaerobic bacteria in the sludge bed to generate biogas, and part of the biogas carries sludge particles into the suspension chamber, and then passes through The three-phase separator separates the three phases of solid, liquid and gas, and the separated gas and liquid are collected by the gas collection chamber and the water collection chamber respectively, and the sludge particles fall back to the sludge bed; with this structure, the water entering the water inlet pipe can only Part of the sludge in the sludge bed is impacted and rolled by the water with pressure, which can easily cause the other parts of the tank that are not impacted by water to form a dead water area, so that the sewage cannot fully react with the anaerobic bacteria in the sludge bed.

Moreover, with the above structure, when the biogas is discharged through the outlet pipe, part of the sewage and a small amount of sludge will be taken away from the equipment due to the gas flow rate and the gas lift effect formed in the pipe, and the instantaneous change of the biogas amount caused by the fluctuation of the water intake will cause the discharge of biogas to be uneven. Clean and unstable; and the three-phase separation effect of the UASB reactor with this structure is poor.

Utility model content

The utility model provides a UASB reactor which fully contacts sewage and anaerobic bacteria, collects gas without impurities, and has good three-phase separation effect.

In order to achieve the above object, the technical scheme adopted in the utility model is as follows:

A UASB reactor, comprising a tank body, the tank body includes a sludge bed, a suspension chamber and a water collection chamber connected in sequence from bottom to top, and a three-phase separator is arranged between the water collection chamber and the suspension chamber , the water collecting chamber is provided with a gas collecting chamber, the bottom of the gas collecting chamber extends into the water collecting chamber, the upper side wall of the water collecting chamber communicates with the upper side wall of the gas collecting chamber respectively The water outlet pipe and the air outlet pipe, the bottom of the tank body is also equipped with a sewage uniform distribution device, and the sewage uniform distribution device communicates with the sludge bed.

As a limitation, the radial length of the upper part of the tank body is greater than the radial length of the lower part, and the upper part and the lower part of the tank body are connected through a horn-shaped side wall, and the bottom end of the three-phase separator is located on the horn-shaped side wall. within the space.

As a limitation, the sewage uniform distribution device includes a main water inlet pipe arranged outside the tank and a water distribution bag connected to the main water inlet pipe, the water distribution bag is connected to a first water distribution mechanism, and the first water distribution The mechanism communicates with the tank body, and the water inlet pump is installed on the main water inlet pipe.

As a limitation, the first water distribution mechanism includes a first water distribution main pipe which communicates with the water distribution bag and is arranged around the outside of the tank, and several one-end extension pipes communicate with each other at intervals on the first water distribution main pipe. To the first water distribution branch pipe of the sludge bed, each of the first water distribution branch pipes is arranged along the radial direction of the tank body; a first control valve is arranged on each of the first water distribution branch pipes.

As a limitation, the sewage uniform distribution device further includes a second water distribution mechanism, and the second water distribution mechanism is connected to the water distribution bag.

As a limitation, the second water distribution mechanism includes a second water distribution main pipe communicated with the water distribution bag, one end of the second water distribution main pipe extends horizontally into the sludge bed, and at this end A plurality of second water distribution branch pipes in a horizontal radial shape are communicated, each of the second water distribution branch pipes is arranged along the radial direction of the tank body, and a second control valve is provided on the second water distribution main pipe.

As a limitation, a flow meter and a steam heat exchanger are provided on the main water inlet pipe at the front end of the water distribution bag.

As a limitation, a horizontal water outlet weir is connected to the end of the water outlet pipe in the water collection chamber.

Due to the adoption of the above-mentioned structure in the utility model, compared with the prior art, the technological progress achieved is:

(1) The sewage uniform distribution device provided by the utility model can increase the average water distribution of the water inlet section, avoid the dead water area in the tank, and make the sewage fully contact and react with the anaerobic bacteria in the sludge bed; the air collection chamber provided , as a buffer for the release of biogas, water and sludge can be removed in the gas collection chamber for the discharged biogas, and the gas collection chamber is submerged underwater to a certain depth to form a water seal, ensuring that the biogas can only be passed through the gas outlet pipe connected to the gas collection chamber Leading out; For some sewage with good biochemical properties, the treatment load is high, the biogas production volume and water inflow flow are relatively large, and the three-phase separator occupies a certain cross-sectional area, resulting in excessive flow rate of the three-phase separator through the water slot. If the number of three-phase separators is reduced, in order to ensure the gas collection effect and keep the folding plate at the original reasonable angle to collect all the biogas, it is necessary to increase the height of the three-phase separation area, which will inevitably reduce the effective contact volume in the reactor. In order to minimize the volume Waste and ensure the effect of each part, enlarge the outer ring of the top of the reactor to increase the cross-sectional area, adopt a larger angle for the inclined plate at the connection of different diameters to facilitate the sludge to slide down, so as to reduce the water gap to a reasonable flow rate and release biogas Speed, and due to the increase of the top diameter, the height of the reactor with the same volume is reduced, which will reduce the power consumption of the pressure lift pump; and can improve the three-phase separation effect;

(2) The first water distribution mechanism and the second water distribution mechanism provided by the sewage uniform distribution device of the utility model can perform the first control of the first water distribution branch pipe and/or the second water distribution branch pipe according to the water intake and operation effect Valve and/or the opening and closing of the second control valve, control the number of the first water distribution branch pipe and/or the second water distribution main pipe and the comprehensive adjustment of the outlet flow rate of each pipe combined with the pressure delivery of the inlet pump, and control the instantaneous flow rate of a single pipe Increase can achieve the effect of flushing the sludge at the bottom and avoid the sludge dead water area. The first water distribution branch pipe and/or the second water distribution branch pipe buffer the water volume from the water inlet pipe to the water distribution bag, and then adjust the valve to evenly distribute the water to each cloth distribution pipe. Water branch pipe; and the set water distribution bag can buffer the sewage entering it from the main water inlet pipe and evenly enter the first water distribution mechanism and the second water distribution mechanism, and enter the first water distribution mechanism and the second water distribution mechanism The pressure of the water in the institution is the same;

(3) The effect of the steam heat exchanger that the utility model is provided with is to keep the temperature of the sewage entering the tank in a better range for reacting with anaerobic bacteria, so that the reaction efficiency is improved;

In summary, the utility model has the characteristics of full contact reaction between sewage and anaerobic bacteria, no impurities in the collected gas, and good three-phase separation effect, and is suitable for the field of sewage treatment.

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the description, and are used to explain the utility model together with the embodiments of the utility model, and do not constitute a limitation to the utility model.

In the attached picture:

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is a schematic structural diagram of a sewage uniform distribution device according to an embodiment of the present invention.

Marked parts: 1-tank, 2-sludge bed, 3-suspension chamber, 4-collection chamber, 5-three-phase separator, 6-gas collection chamber, 7-outlet pipe, 8-outlet weir, 9- Outlet pipe, 10-sewage uniform distribution device, 11-first water distribution main pipe, 12-first water distribution branch pipe, 13-second water distribution main pipe, 14-second water distribution branch pipe, 15-water distribution bag, 16- Steam heat exchanger, 17-first control valve, 18-second control valve.

Detailed ways

Preferred embodiments of the present utility model are described below in conjunction with accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the utility model, and are not intended to limit the utility model.

Example UASB reactor

This embodiment discloses a UASB reactor, referring to Fig. 1, including a tank body 1, which is provided with a sludge bed 2, a suspension chamber 3 and a water collection chamber 4 connected in sequence from bottom to top in the tank body 1, the water collection chamber A three-phase separator 5 is installed between 4 and the suspension chamber 3 .

The upper part and the lower part of the tank body 1 are cylindrical shells, the radius of the upper shell of the tank body 1 is greater than the radius of the lower shell, and the upper part and the lower part of the tank body 1 are connected as a whole by a trumpet-shaped side wall, of which three The bottom end of the phase separator 5 is located in the space formed by the trumpet-shaped side walls.

The water collecting chamber 4 is provided with an air collecting chamber 6, the bottom of the air collecting chamber 6 extends into the water collecting chamber 4, and the upper side wall of the water collecting chamber 4 and the upper side wall of the air collecting chamber 6 are respectively connected with water outlet pipes 7 and the air outlet pipe 9, and the end of the outlet pipe 7 located in the tank 1 is connected with a horizontal water outlet weir 8; the bottom of the tank 1 is also provided with a sewage uniform distribution device 10, and the sewage uniform distribution device 10 is connected to the sludge bed 2 connected.

Referring to Fig. 2, the sewage uniform distribution device 10 includes a water distribution bag 15 arranged on the main water inlet pipe outside the tank body 1 and communicated with the main water inlet pipe. Device 16; the water inlet end of the total water inlet pipe is equipped with a water inlet pump (not shown in the figure), and the water distribution bag 15 is connected with the first water distribution mechanism.

The first water distribution mechanism includes a first water distribution main pipe 11 that communicates with the water distribution bag 15 and surrounds the outside of the tank body 1. On the first water distribution main pipe 11, there are a plurality of first water distribution pipes that extend into the sludge bed 2 at intervals. The water branch pipes 12, each of the first water distribution branch pipes 12 are evenly arranged along the radial direction of the tank body 1, and each first water distribution branch pipe 12 is equipped with a first control valve 17.

The sewage uniform distribution device 10 also includes a second water distribution mechanism. The second water distribution mechanism includes a second water distribution main pipe 13 communicated with the water distribution bag 15. One end of the second water distribution main pipe 13 extends horizontally to the center of the sludge bed 2 , and this end is connected with a plurality of second water distribution branch pipes 14 in a horizontal radial shape, each second water distribution branch pipe 14 is evenly arranged along the radial direction of the tank body 1, and the second water distribution main pipe 13 is installed There is a second control valve 18 .

The working principle of the utility model embodiment is as follows:

When the sewage is lifted by the water inlet pump and flows through the water inlet pipe, the water flow rate is adjusted according to the display of the flowmeter, and the sewage is heated by the steam heat exchanger 16 until it reaches a stable temperature. The sewage is pumped into the water distribution bag 15 through the water inlet pump, and then enters the first water distribution mechanism and the second water distribution mechanism, and the first water distribution mechanism and the second water distribution mechanism distribute the sewage into the sludge in the tank body 1 Bed 2, make the organic substances in the sewage fully contact and react with the anaerobic bacteria in the sludge bed 2 in the sludge bed 2 and the suspension chamber 3, and generate biogas after the reaction, and part of the biogas carries the sludge particles to rise; the rising The biogas passes through the three-phase separator 5 to separate the sludge particles. Since the bottom end of the three-phase separator 5 is set in the space formed by the horn-shaped side wall, the part of the three-phase separator 5 that is close to the horn-shaped side wall will be separated. The sludge particles slide into the suspension chamber 3 through the side wall; the water collection chamber 4 collects the liquid separated by the three-phase separator 5 through the outlet weir 8 and the outlet pipe 7; the gas collection chamber 6 is used as a buffer for the release of biogas to avoid biogas The volume increases instantaneously so that the gas stripped out of the tank carries water or sludge, and the biogas discharged from the three-phase separator can remove water and sludge in the gas collection chamber 6; the bottom end of the gas collection chamber 6 extends into the water collection chamber 4. It is not below the liquid level of the water collection chamber 4 to form a water seal to ensure that the biogas can only be drawn out from the air outlet pipe 9 of the gas collection chamber 6 .

Finally, it should be noted that: the above is only a preferred embodiment of the utility model, and is not intended to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art , it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model shall be included within the protection scope of the claims of the utility model.

Claims (8)

1. a kind of UASB reactors, it is characterised in that：Include being sequentially communicated from bottom to top including tank body (1), in the tank body (1) Sludge Bed (2), floater (3) and collecting chamber (4), between the collecting chamber (4) and the floater (3) be equipped with three phase separation Device (5), the collecting chamber (4) are equipped with collection chamber (6), and the bottom end of the collection chamber (6) extends in the collecting chamber (4), It has been respectively communicated with outlet pipe (7) and escape pipe (9) in collecting chamber (4) upper portion side wall and the collection chamber (6) upper portion side wall, Tank body (1) bottom is additionally provided with sewage even distribution device (10), and the sewage even distribution device (10) connects with the Sludge Bed (2) It is logical.

2. UASB reactors according to claim 1, it is characterised in that：The radical length on tank body (1) top is more than The radical length of lower part, and the top of tank body (1) is connect with lower part through horn-like side wall, the bottom of the three phase separator (5) End is located in the space that horn-like side wall is constituted.

3. UASB reactors according to claim 1, it is characterised in that：The sewage even distribution device (10) includes being set to institute The Fen Shuibao (15) for stating the outer water inlet manifold of tank body (1) and being connect with water inlet manifold, it is described that water packet (15) is divided to be connected with the first cloth Water dispenser structure, first water distributing mechanism are connected to the tank body (1), and intake pump is equipped on the water inlet manifold.

4. UASB reactors according to claim 3, it is characterised in that：First water distributing mechanism includes dividing water with described Packet (15) connection and be located on the first cloth supply mains (11) of the tank body (1) outside, on the first cloth supply mains (11) Interval is communicated with the first water distribution branch pipe (12) that several one end extend to the Sludge Bed (2), each first water distribution branch pipe (12) it is laid along the radial direction of the tank body (1)；It is equipped with the first control valve (17) in each first water distribution branch pipe (12).

5. UASB reactors according to claim 3, it is characterised in that：The sewage even distribution device (10) further includes second Water distributing mechanism, second water distributing mechanism divide water packet (15) to connect with described.

6. UASB reactors according to claim 5, it is characterised in that：Second water distributing mechanism includes dividing water with described The second cloth supply mains (13) of (15) connection is wrapped, one end of the second cloth supply mains (13) extends horizontally to the Sludge Bed (2) in, and the second water distribution branch pipe (14) that several are in horadiam, each second water distribution branch are communicated in this end end The radial direction that (14) are managed along the tank body (1) is laid, and the second control valve (18) is equipped in the second cloth supply mains (13).

7. UASB reactors according to claim 3, it is characterised in that：In it is described divide water packet (15) front end it is described always into Water pipe is equipped with flowmeter and vapor heat exchanger (16).

8. UASB reactors according to claim 1, it is characterised in that：The outlet pipe in the collecting chamber (4) (7) end is connected with horizontally disposed effluent weir (8).