CN112456730B

CN112456730B - AO combination of built-in MBR reinforces denitrogenation decarbonization device

Info

Publication number: CN112456730B
Application number: CN202011217842.4A
Authority: CN
Inventors: 徐敬生; 郭志成; 陈振; 徐慧娟; 黄前霖; 吕路
Original assignee: Enire Jiangsu Environmental Development Co ltd
Current assignee: Enire Jiangsu Environmental Development Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2023-04-07
Anticipated expiration: 2040-11-04
Also published as: CN112456730A

Abstract

The invention provides an AO combined enhanced nitrogen and carbon removal device with a built-in MBR, which comprises a box body, a pretreatment unit arranged in the box body and used for carrying out pretreatment on wastewater, and an advanced treatment unit arranged in the box body and used for carrying out retreatment on the wastewater treated by the pretreatment unit; the deep processing unit comprises an AO processing unit and an MBR processing unit; the device has reasonable integral structure design, and the MBR membrane module is selectively placed in the AO process by utilizing the lifting unit for use, so that the sludge reflux amount and the sludge concentration in the AO process can be effectively improved, and the SS concentration of effluent can be reduced, thereby effectively strengthening the effects of denitrification and carbon removal. In a word, the device has the advantages of high efficiency, small occupied area, low investment and the like, and has good application prospect.

Description

AO combination of built-in MBR reinforces denitrogenation decarbonization device

Technical Field

The invention relates to the technical field of wastewater treatment equipment, in particular to an AO combined enhanced denitrification and decarbonization device with a built-in MBR.

Background

In recent years, the rapid development of national economy and the improvement of the living standard of people in China have increasingly severe water pollution problems. The organic matter and the nitrogen-containing pollutants are more prominently expressed, and the pollutants are discharged out of the standard, thereby causing water eutrophication in large-area areas, causing serious water ecological disasters and secondary disasters and bringing huge environmental and economic losses to the country. For this reason, countries have continued to set more stringent legislation to limit such wastewater discharge. Therefore, the development of high-efficiency organic matter removal and denitrification treatment processes and equipment has important significance in adapting to new environmental regulations and protecting ecological environment. Among various sewage treatment processes, the AO process is generally favored because of its advantages of simple flow, less investment, excellent removal effect and the like. However, the AO process has no independent sludge recirculation system, so that the concentration of the sludge is not high and the sludge with unique functions cannot be cultured, thereby affecting the process treatment. The AO-MBR process is a novel water treatment process developed by organically combining the traditional AO activated sludge treatment process and the membrane separation technology, has the advantages of the AO activated sludge treatment process and the membrane separation technology, can play a role in synergistic enhancement between the AO activated sludge treatment process and the membrane separation technology, and improves the wastewater treatment effect. The prior AO-MBR process needs a secondary sedimentation tank to remove SS in an AO section, an MBR membrane tank mainly increases the sludge concentration, and simultaneously realizes the enhanced denitrification and decarbonization effects by effectively intercepting membranes. However, MBR membranes require separate membrane tanks, which require separate floor space, and to some extent limit their industrial application.

Disclosure of Invention

Aiming at the existing problems, the invention provides an AO combined enhanced denitrification and decarbonization device with a built-in MBR; the device combines the AO technology and the MBR technology, can effectively improve the sludge reflux amount of AO and reduce the SS concentration of effluent; and the occupied area can be reduced, the aeration pipeline is efficiently utilized, and the investment cost is effectively saved.

The technical scheme of the invention is as follows: an AO combined enhanced denitrification and decarbonization device with built-in MBR comprises a box body, a pretreatment unit arranged in the box body and used for carrying out pretreatment on wastewater, and an advanced treatment unit arranged in the box body and used for carrying out retreatment on the wastewater treated by the pretreatment unit; the box body comprises a first box body, a movable mounting piece arranged on the first box body and a second box body movably arranged on the first box body through the movable mounting piece;

the first box body comprises a pretreatment cavity and an AO treatment cavity which are connected in sequence;

the pretreatment unit is arranged in the pretreatment cavity; the pretreatment unit comprises a cutting cylinder arranged in the pretreatment cavity and a mounting plate used for mounting the cutting cylinder on the inner wall of the pretreatment cavity; the dividing cylinder divides the pretreatment cavity into an inner cavity and an outer cavity; the number of the mounting plates is 4, the 4 mounting plates are uniformly and axially mounted in the outer cavity, and the outer cavity is divided into a first filtering cavity, a second filtering cavity, a third filtering cavity and a fourth filtering cavity by the 4 mounting plates; the first filter cavity, the second filter cavity, the third filter cavity, the fourth filter cavity and the inner cavity are sequentially communicated, and filter screens are arranged at the communicated positions;

the advanced treatment unit comprises an AO treatment unit arranged in the AO treatment cavity and an MBR treatment unit arranged in the second box body;

the AO treatment unit comprises an anoxic cavity communicated with the inner cavity, an aerobic cavity communicated with the anoxic cavity and an aeration device arranged in the aerobic cavity; the upper end of the aerobic cavity is provided with a lifting through hole;

the MBR treatment unit comprises an MBR membrane module and a lifting unit for installing the unit body; the lifting unit is installed in the second box body, and the MBR membrane module can pass through the lifting port to move between the aerobic cavity and the second box body by the power provided by the lifting unit.

Further, the moving mount includes a rail unit mounted on the first casing, and a mounting bracket mounted on the rail unit; the guide rail unit comprises two rails respectively arranged at the upper ends of the side walls of the two sides of the first box body, 4 sliding blocks arranged on the 2 rails in pairs, and a driving motor for providing power for the sliding blocks; the lower end of the mounting rack is arranged on the 4 sliding blocks; the second box body can be moved by the moving installation piece; the guide rail unit and the mounting frame are convenient to disassemble, so that later maintenance is facilitated;

furthermore, a rotating assembly is arranged in the pretreatment cavity; the rotating assembly comprises a wave wheel arranged in the inner cavity and a motor assembly capable of providing power for the wave wheel; the rotating assembly can form rotational flow to a water source in the inner cavity, so that the problem of blockage caused by the accumulation of suspended matters in the inner cavity can be effectively avoided;

furthermore, the first filter chamber, the second filter chamber, the third filter chamber, the fourth filter chamber and the inner chamber are sequentially communicated, and a first filter screen, a second filter screen, a third filter screen and a fourth filter screen are respectively arranged at the communicated positions; the aperture ratio of the first filter screen to the second filter screen to the third filter screen to the fourth filter screen is (3); sequentially carrying out filtering pretreatment on the wastewater before treatment by utilizing a first filter screen, a second filter screen, a third filter screen and a fourth filter screen, so that impurities with different apertures are retained in the first filter chamber, the second filter chamber, the third filter chamber and the fourth filter chamber in batches through the first filter screen, the second filter screen, the third filter screen and the fourth filter screen; the lower ends of the first filter cavity, the second filter cavity, the third filter cavity and the fourth filter cavity are provided with sewage discharge notches;

further, the MBR membrane module comprises a gas collecting tank, a membrane frame arranged at the upper end of the gas collecting tank, an MBR membrane arranged inside the membrane frame, and a water collecting pipe arranged at the upper end of the membrane frame; the aeration pipeline of the aerobic cavity can be fully utilized by utilizing the gas collecting tank, aeration equipment is prevented from being additionally arranged on the MBR membrane component, and the investment cost is effectively reduced;

further, the lifting unit comprises a chain lifting mechanism arranged inside the second box body and a mounting piece for mounting the MBR membrane module; the chain lifting mechanism can effectively lift the MBR membrane component to the interior of the aerobic cavity, so that the MBR membrane component is positioned right above the aeration equipment; on one hand, the aeration efficiency can be effectively improved, and on the other hand, the occupied area can be effectively reduced;

furthermore, the chain lifting mechanism comprises a mounting rod mounted on the side wall of the second box body, a chain shaft movably arranged at the upper end of the mounting rod, a power mechanism mounted on the mounting rod, and a chain with one end fixedly mounted on the power mechanism and the other end penetrating through the chain shaft; the mounting piece comprises a sliding frame arranged on the outer side of the mounting rod and a fixed frame movably arranged on the sliding frame; the other end of the chain is fixed on the fixing frame.

Compared with the prior art, the invention has the beneficial effects that:

1. the device has reasonable integral structure design, and the MBR membrane module is selectively placed in the AO process by utilizing the lifting unit for use, so that the sludge reflux amount and the sludge concentration in the AO process can be effectively improved, and the SS concentration of effluent can be reduced, thereby effectively strengthening the effects of denitrification and decarbonization;

2. on one hand, the device reduces the occupied space of the MBR membrane tank on the premise of not reducing the volume of the sludge tank; on the other hand, the MBR treatment unit with a special structure can be effectively combined with the use of aeration equipment inside the aerobic cavity, so that the requirement of oxygen required during the operation of the MBR membrane component can be effectively met, and the cost for additionally arranging the aeration device is effectively reduced.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

FIG. 2 is an exploded view of embodiment 1 of the present invention;

FIG. 3 is a front sectional view of embodiment 1 of the present invention;

FIG. 4 is a partial top sectional view of embodiment 1 of the present invention;

FIG. 5 is a schematic view of a partial structure of an MBR processing unit in accordance with embodiment 1 of the present invention;

fig. 6 is a schematic structural view of a lifting unit of embodiment 3 of the present invention;

the device comprises a first box body 1, a pretreatment cavity 11, an inner cavity 111, an outer cavity 112, a first filter cavity 113, a second filter cavity 114, a third filter cavity 115, a fourth filter cavity 116, a treatment cavity 12-AO, a rotating assembly 13, a wave wheel 131, a motor assembly 132, a 2-moving installation member 21, a guide rail unit 211, a track 212, a slide block 22, a mounting rack 3, a second box 41, a partition cylinder 42, a mounting plate 5, an anoxic cavity 51, an aerobic cavity 52, a lifting port 520, an aeration device 53, an MBR 6, a gas collecting tank 61, a membrane frame 62, an MBR 63, a MBR 64, a water collecting pipe 7, a chain lifting mechanism 71, a chain lifting mechanism 711, a mounting rod 712, a power mechanism 713, a chain 714, a chain 72, a mounting member 721-sliding frame and a fixing frame 722.

Detailed Description

Example 1: as shown in fig. 1 and 2, the AO combined enhanced nitrogen and carbon removal device with built-in MBR comprises a tank body, a pretreatment unit arranged in the tank body for performing pretreatment on wastewater, and an advanced treatment unit arranged in the tank body for performing retreatment on the wastewater treated by the pretreatment unit; the box body comprises a first box body 1, a movable installation part 2 arranged on the first box body 1 and a second box body 3 movably arranged on the first box body 1 through the movable installation part 2;

as shown in fig. 3, the first tank 1 includes a pretreatment chamber 11 and an AO treatment chamber 12 connected in sequence;

as shown in fig. 4, the pretreatment unit is disposed in the pretreatment chamber 11; the pretreatment unit comprises a segmentation cylinder 41 arranged in the pretreatment cavity 11, and a mounting plate 42 used for mounting the segmentation cylinder 41 on the inner wall of the pretreatment cavity 11; the dividing cylinder 41 divides the pretreatment chamber 11 into an inner chamber 111 and an outer chamber 112; the number of the mounting plates 42 is 4, 4 mounting plates 42 are uniformly and axially mounted in the outer cavity 112, and the outer cavity 112 is divided into a first filter cavity 113, a second filter cavity 114, a third filter cavity 115 and a fourth filter cavity 116 by the 4 mounting plates 42; the first filtering cavity 113, the second filtering cavity 114, the third filtering cavity 115, the fourth filtering cavity 116 and the inner cavity 111 are communicated in sequence, and filter screens are arranged at the communicated positions;

a rotating component 13 is arranged in the pretreatment cavity 11; the rotating assembly 13 includes a pulsator 131 installed in the inner chamber 111, and a motor assembly 132 capable of powering the pulsator 131;

the moving mount 2 includes a rail unit 21 mounted on the first casing 1, and a mount 22 mounted on the rail unit 21; the guide rail unit 21 comprises two rails 211 respectively installed at the upper ends of the side walls of the first case 1,4 sliders 212 installed on the 2 rails 211 in pairs, and a driving motor for providing power to the sliders 212; the lower end of the mounting frame 22 is arranged on 4 sliding blocks 212;

as shown in fig. 3, the advanced treatment unit includes an AO treatment unit 5 provided inside the AO treatment chamber 12, and an MBR treatment unit 6 provided inside the second casing 3;

the AO treatment unit 5 includes an anoxic chamber 51 communicating with the inner chamber 111, an aerobic chamber 52 communicating with the anoxic chamber 51, and an aeration device 53 installed inside the aerobic chamber 52; the upper end of the aerobic cavity 52 is provided with a lifting port 520;

the MBR treatment unit 6 comprises an MBR membrane module, and a lifting unit 7 for mounting the unit body; the lifting unit 7 is arranged in the second box body 3, and the MBR membrane module can move between the aerobic cavity 52 and the second box body 3 through the lifting port 520 by the power provided by the lifting unit 7;

as shown in fig. 5, the MBR membrane module includes a gas collecting tank 61, a membrane frame 62 installed at an upper end of the gas collecting tank 61, an MBR membrane 63 installed inside the membrane frame 62, and a water collecting pipe 64 installed at an upper end of the membrane frame 62;

as shown in fig. 3, the lifting unit 7 includes a chain lifting mechanism 71 installed inside the second casing 3, and a mounting member 72 for mounting the MBR membrane module.

Example 2: the difference from example 1 is: the first filtering cavity 113, the second filtering cavity 114, the third filtering cavity 115, the fourth filtering cavity 116 and the inner cavity 111 are sequentially communicated, and a first filter screen, a second filter screen, a third filter screen and a fourth filter screen are respectively arranged at the communicated positions; the aperture ratio of the filter holes of the first filter screen, the second filter screen, the third filter screen and the fourth filter screen is 3.

Example 3: the difference from example 1 is: as shown in fig. 6, the chain lifting mechanism 71 includes a mounting bar 711 mounted on a sidewall of the second housing 3, a chain axle 712 movably disposed at an upper end of the mounting bar 711, a power mechanism 713 mounted on the mounting bar 711, and a chain 714 having one end fixedly mounted on the power mechanism 713 and the other end passing through the chain axle 712; the mounting member 72 includes a carriage 721 mounted on the outer side of the mounting rod 711, and a fixing frame 722 movably mounted on the carriage 721; the other end of the chain 714 is fixed to the fixed bracket 722.

Claims

1. An AO combined enhanced denitrification and decarbonization device with built-in MBR comprises a box body, a pretreatment unit arranged in the box body and used for carrying out pretreatment on wastewater, and an advanced treatment unit arranged in the box body and used for carrying out retreatment on the wastewater treated by the pretreatment unit; the device is characterized in that the box body comprises a first box body (1), a movable installation part (2) arranged on the first box body (1) and a second box body (3) movably arranged on the first box body (1) through the movable installation part (2);

the first box body (1) comprises a pretreatment cavity body (11) and an AO treatment cavity body (12) which are connected in sequence; a rotating component (13) is arranged in the pretreatment cavity (11); the rotating assembly (13) comprises a pulsator (131) mounted in an inner cavity (111), and a motor assembly (132) capable of powering the pulsator (131);

the mobile mounting part (2) comprises a guide rail unit (21) arranged on the first box body (1) and a mounting frame (22) arranged on the guide rail unit (21); the guide rail unit (21) comprises two rails (211) respectively arranged at the upper ends of the side walls of the two sides of the first box body (1), 4 sliding blocks (212) arranged on the 2 rails (211) in pairs, and a driving motor for providing power for the sliding blocks (212); the lower end of the mounting rack (22) is arranged on 4 sliding blocks (212);

the pretreatment unit is arranged in the pretreatment cavity (11); the pretreatment unit comprises a dividing cylinder (41) arranged in the pretreatment cavity (11), and a mounting plate (42) used for mounting the dividing cylinder (41) on the inner wall of the pretreatment cavity (11); the dividing cylinder (41) divides the pretreatment cavity (11) into an inner cavity (111) and an outer cavity (112); the number of the mounting plates (42) is 4, the 4 mounting plates (42) are uniformly and axially mounted in the outer cavity (112), and the outer cavity (112) is divided into a first filtering cavity (113), a second filtering cavity (114), a third filtering cavity (115) and a fourth filtering cavity (116) by the 4 mounting plates (42); the first filtering cavity (113), the second filtering cavity (114), the third filtering cavity (115), the fourth filtering cavity (116) and the inner cavity (111) are communicated in sequence, and filter screens are arranged at the communicated positions;

the advanced treatment unit comprises an AO treatment unit (5) arranged inside an AO treatment cavity (12) and an MBR treatment unit (6) arranged inside the second box body (3);

the AO treatment unit (5) comprises an anoxic cavity (51) communicated with the inner cavity (111), an aerobic cavity (52) communicated with the anoxic cavity (51), and an aeration device (53) arranged inside the aerobic cavity (52); the upper end of the aerobic cavity (52) is provided with a lifting through hole (520);

the MBR treatment unit (6) comprises an MBR membrane module and a lifting unit (7) for installing a unit body; the lifting unit (7) is arranged in the second box body (3), and the MBR membrane module can move between the aerobic cavity (52) and the second box body (3) through the lifting through port (520) by the power provided by the lifting unit (7); the MBR membrane module comprises a gas collecting tank (61), a membrane frame (62) arranged at the upper end of the gas collecting tank (61), an MBR membrane (63) arranged inside the membrane frame (62), and a water collecting pipe (64) arranged at the upper end of the membrane frame (62).

2. The AO combined enhanced denitrification and decarbonization device with built-in MBR according to claim 1, wherein the first filter chamber (113), the second filter chamber (114), the third filter chamber (115), the fourth filter chamber (116) and the inner chamber (111) are sequentially communicated, and a first filter screen, a second filter screen, a third filter screen and a fourth filter screen are respectively arranged at the communicated positions; the aperture ratio of the first filter screen to the second filter screen to the third filter screen to the fourth filter screen is 3.

3. The AO combined enhanced denitrification and decarbonization device with built-in MBR according to claim 1, wherein the lifting unit (7) comprises a chain lifting mechanism (71) installed inside the second case (3), and an installation member (72) for installing MBR membrane modules.