Continuous filtering device for biological wastewater

Abstract

The utility model provides a biological wastewater continuous filtering device which comprises a first filtering single body and a second filtering single body, and each filtering single body comprises a water inlet, a water outlet, a steam inlet for sterilization and a filter screen; water inlets of the first filtering unit and the second filtering unit are connected with a biological wastewater inlet pipeline, each water inlet is provided with a biological wastewater inlet electric valve, water outlets of the first filtering unit and the second filtering unit are connected with an inlet of the inactivation tank, and each water outlet is provided with a biological wastewater discharge valve; an industrial steam electric valve is arranged at the steam inlet, an inlet of the filter screen is connected with the water inlet, and filtered wastewater and sterilized distilled water are converged and then discharged from the water outlet. According to the utility model, the two filtering single bodies with the same structure are connected in parallel, when one filtering single body is in the sterilization and cleaning process, the other filtering single body can work normally, and the continuous discharge of bioactive wastewater is ensured by alternate circulating filtration.

Description

Technical Field

[0001] The utility model relates to the field of wastewater filtering devices, in particular to a biological wastewater continuous filtering device. Background Art

[0002] At present, a large amount of active biological wastewater is generated during experiments and production processes in biopharmaceutical companies, laboratories, research institutes and other units. These biological wastewaters contain a large number of living bacteria and viruses, which are very harmful. They need to be disinfected and sterilized to kill the pathogens before they can be discharged into the next-level sewage treatment system.

[0003] Biological wastewater needs to be filtered before inactivation to filter out impurities with larger particles to avoid clogging of subsequent pipelines. The commonly used method is to add a filtering device in the pipeline, and the biological wastewater with impurities filtered out will then enter the inactivation tank.

[0004] When the filtering capacity of the filtering equipment reaches saturation, it is necessary to shut down the filtering equipment and clean the impurities in the filtering equipment to prevent the impurities in the biologically active wastewater from entering the inactivation tank and causing pipeline blockage or component damage. At this time, the discharge of biological wastewater needs to be interrupted, and even the entire biological wastewater pipeline needs to be shut down. On the other hand, during the cleaning process of the filtering equipment, the fire extinguishing tank connected to the filtering equipment may be exposed to the outside world, causing serious biological safety accidents. Utility Model Content

[0005] In view of the defects in the prior art, the purpose of the utility model is to provide a biological wastewater continuous filtering device.

[0006] According to the utility model, a biological wastewater continuous filtering device is provided, comprising: a first filtering unit and a second filtering unit, each filtering unit comprising a water inlet, a water outlet, a steam inlet for sterilization and a filter screen;

[0007] The water inlets of the first filter monomer and the second filter monomer are connected to the biological wastewater inlet pipe, and each water inlet is provided with a biological wastewater inlet electric valve. The water outlets of the first filter monomer and the second filter monomer are connected to the inlet of the inactivation tank, and each water outlet is provided with a biological wastewater discharge valve; an industrial steam electric valve is provided at the steam inlet, and the inlet of the filter net is connected to the water inlet, and the filtered wastewater and the sterilized distilled water are gathered and discharged from the outlet.

[0008] Preferably, the first filter unit and the second filter unit are both provided with pressure sensors for indicating the clogging of the filter screen.

[0009] Preferably, the first filter unit and the second filter unit both include a compressed air inlet for indicating the sealing condition of the filter unit.

[0010] Preferably, a hand hole cover is provided at one end of each filter unit, and a sealing gasket is provided at the connection between the hand hole cover and the filter unit.

[0011] Preferably, the filter screen is a multi-layer screen structure arranged coaxially, which includes a primary filter screen, a secondary filter screen and a tertiary filter screen from the inside to the outside; the primary filter screen, the secondary filter screen and the tertiary filter screen have filter holes of different mesh sizes.

[0012] Preferably, filter mesh sealing pads are provided between the primary filter mesh and the water inlet, and at two adjacent filter mesh ports.

[0013] Preferably, each of the water outlets is provided with a condensate pipe and a biological wastewater outlet pipe, the biological wastewater discharge valve is arranged on the biological wastewater outlet pipe, and the biological wastewater outlet pipe is connected to the inlet of the inactivation tank; the condensate pipe is respectively provided with a condensate discharge electric valve, a condensate filter and a steam trap.

[0014] Preferably, a condensate bypass is connected at both ends of the condensate pipeline, and a condensate electric bypass valve is provided in the condensate bypass.

[0015] Preferably, the first filter monomer and the second filter monomer are both provided with a tap water inlet for cleaning, and a tap water electric valve is provided at the tap water inlet.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The utility model sets two filter monomers with the same structure in parallel connection. When one filter monomer is in the sterilization and cleaning process, the other filter monomer can work normally, so as to ensure the uninterrupted discharge of biologically active wastewater by alternating and circulating filtration. And by closing the valves at both ends of the filter monomer during the sterilization and cleaning process, the inactivation tank is prevented from being connected to the outside world.

[0018] 2. The utility model improves the filtering effect and alleviates the problem of filter clogging too quickly by setting a three-stage filtering filter screen structure. At the same time, the step-by-step filtering facilitates the cleaning of the filter screen.

[0019] 3. In the utility model, the filter monomer is cleaned with tap water after cleaning, and sealing measures are provided at each connection of the filter monomer. The sealing performance of the filter monomer is verified by compressed air, thereby ensuring the safety of the filter monomer when it is put into use after cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0021] Figure 1 This is a schematic diagram of the principle flow of the filtering device of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the monomer filter unit of the utility model;

[0023] Figure 3 This is a side view of the monomer filter unit of the utility model;

[0024] Figure 4 This is a schematic diagram of the side view structure of the monomer filter unit of the utility model;

[0025] Figure 5 This is a schematic diagram of the filter structure of the utility model.

[0026] Description of reference numerals:

[0027] First filter unit 1 First filter unit biological wastewater inlet electric valve 16

[0028] Water outlet 101 First filter unit compressed air electric valve 14

[0029] Insulation head 102 Second filter unit 2

[0030] Hand hole bolt 103 Second filter unit temperature sensor 21

[0031] Hand hole cover 104 Second filter unit pressure sensor 22

[0032] Mirror 105 Second filter unit tap water electric valve 23

[0033] Filter seal 106 Second filter unit compressed air electric valve 24

[0034] Hand hole flange 107 Second filter monomer industrial steam electric valve 25

[0035] Tap water inlet 108 Second filter monomer biological wastewater inlet electric valve 26

[0036] Compressed air inlet 109 Water pipe 3

[0037] Industrial steam inlet 110 Compressed air pipeline 4

[0038] Filter 111 Industrial steam pipe 5

[0039] Filter hole 1111 Biological wastewater inlet pipe 6

[0040] Filter flange 1112 Condensate pipe 7

[0041] Inlet pipe guide flange 1113 First filter unit condensate electric bypass valve 71

[0042] Filter inner handle 1114 First filter unit condensate discharge electric valve 72

[0043] Three-stage filter 1115 First filter monomer condensate filter 73

[0044] Secondary filter 1116 First filter unit steam trap 74

[0045] First filter screen 1117 Second filter unit condensate electric bypass valve 75

[0046] Filter bottom center flange 112 Second filter unit condensate discharge electric valve 76

[0047] Water inlet 113 Second filter unit condensate filter 77

[0048] First filter unit temperature sensor 11 Second filter unit steam trap 78

[0049] First filter unit pressure sensor 12 Biological wastewater outlet pipe 8

[0050] First filter unit tap water electric valve 13 First filter unit biological wastewater discharge valve 81

[0051] The first filter unit industrial steam electric valve 15 The second filter unit biological wastewater discharge valve 82 DETAILED DESCRIPTION

[0052] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0053] The utility model discloses a biological wastewater continuous filtering device, comprising a first filtering monomer 1 and a second filtering monomer 2, wherein the two filter monomers are connected in parallel.

[0054] Each independent filter unit is provided with a water outlet 101, a heat preservation head 102, a hand hole bolt 103, a hand hole cover 104, a sight glass 105, a filter screen seal 106, a hand hole flange 107, a tap water inlet 108, a compressed air inlet 109, an industrial steam inlet 110, a filter screen 111, a center flange 112 at the bottom of the filter screen, and a water inlet 113. A tap water pipe 3, a compressed air pipe 4, an industrial steam pipe 5, and a biological wastewater inlet pipe 6 are also reserved and installed at the installation site of the biological wastewater continuous filtration device. The tap water pipe 3 is connected to the tap water inlet 108, the compressed air pipe 4 is connected to the compressed air inlet 109, the industrial steam pipe 5 is connected to the industrial steam inlet 110, and the biological wastewater inlet pipe 6 is connected to the water inlet 113. The condensed water pipe 7 and the biological wastewater outlet pipe 8 are connected at the water outlet 101. The biological wastewater outlet pipe 8 contains filtered biological wastewater, which is transported to the inactivation tank.

[0055] In a specific embodiment, the first filter monomer 1 is provided with a first filter monomer temperature sensor 11 and a first filter monomer pressure sensor 12 at the top of the body, a first filter monomer tap water electric valve 13 is provided at the water outlet 101, a first filter monomer compressed air electric valve 14 is provided at the compressed air inlet 109, a first filter monomer industrial steam electric valve 15 is provided at the industrial steam inlet 110, and a first filter monomer biological wastewater inlet electric valve 16 is provided at the water inlet 113. A first filter monomer biological wastewater discharge valve 81 is provided on the biological wastewater outlet pipe 8, and a first filter monomer condensate discharge electric valve 72, a first filter monomer condensate filter 73 and a first filter monomer steam trap 74 are respectively provided on the condensate pipe 7. A condensate bypass is connected at both ends of the condensate pipe 7, and a first filter monomer condensate electric bypass valve 71 is provided in the condensate bypass.

[0056] The top of the body of the second filter unit 2 is provided with a first filter unit temperature sensor 21 and a first filter unit pressure sensor 22, a second filter unit tap water electric valve 23 is provided at the water outlet 101, a second filter unit compressed air electric valve 24 is provided at the compressed air inlet 109, a second filter unit industrial steam electric valve 25 is provided at the industrial steam inlet 110, and a second filter unit biological wastewater inlet electric valve 26 is provided at the water inlet 113. A second filter unit biological wastewater discharge valve 82 is provided on the biological wastewater outlet pipe 8, and a second filter unit condensate discharge electric valve 76, a second filter unit condensate filter 77 and a second filter unit steam trap 78 are respectively provided on the condensate pipe 7. A condensate bypass is connected at both ends of the condensate pipe 7, and a first filter unit condensate electric bypass valve 75 is provided in the condensate bypass.

[0057] When the first filter unit 1 works for a period of time and generates a pressure difference, the first filter unit pressure sensor 12 enables the electronic control system to control the second filter unit biological wastewater inlet electric valve 26 and the second filter unit biological wastewater discharge valve 82 installed on the second filter unit 2 to open, while the first filter unit biological wastewater inlet electric valve 16 and the first filter unit biological wastewater discharge valve 81 on the first filter unit 1 are closed; the second filter unit 2 starts to perform the biological wastewater pre-filtration function.

[0058] The first filter unit 1 starts to perform sterilization, cleaning, washing, and pressure maintenance procedures. The first filter unit industrial steam electric valve 15 is opened, the first filter unit condensate discharge electric valve 72 is opened, and the first filter unit 1 enters the heating sterilization procedure. During the sterilization process, the switch of the first filter unit industrial steam electric valve 15 is controlled to control the pressure and temperature of the first filter unit 1; when the sterilization is completed, open the hand hole cover 104, take out the filter 111, open the filter flange 1112, clean the dirt in the different levels of filters in 111 and put it into the designated collection frame for hazardous waste disposal; reinstall the filter 111, install and fix the hand hole cover 104, open the first filter unit tap water electric valve 13 and the first filter unit biological wastewater discharge valve 81, The first filter monomer 1 is cleaned according to a fixed procedure, and the cleaned water is discharged to the inactivation tank through the biological wastewater outlet pipe 8; the compressed air electric valve 14 of the first filter monomer is opened, and other electric valves are closed, and the first filter monomer is subjected to a pressure holding test. After the test is passed, it enters the standby state, and the operation is alternately cyclical. Therefore, when one filter monomer is sterilized, cleaned, or rinsed, the other filter monomer can work normally. The alternating cycle filtration ensures the uninterrupted discharge of biologically active wastewater, avoids the situation in which impurities in the biologically active wastewater enter the inactivation tank and cause pipe blockage or component damage, thereby avoiding the risk of affecting the normal operation of the biosafety laboratory or workshop and the occurrence of biosafety accidents.

[0059] The internal filter 111 structure of the filter monomer of the utility model is provided with three-level filter layers, and each filter layer adopts through holes of different mesh sizes to filter large particles to small particles in three levels step by step. This filtering method has good filtering effect, can effectively filter dirt, and slow down the problem of filter clogging too quickly; at the same time, a filter mesh flange 1112 is provided, which is easy to disassemble, and can solve the problem that dirt in different filter levels is difficult to clean.

[0060] The hand hole cover 104 of the filter unit of the utility model is connected by a flange seal; the filter screen 111 is arranged in the filter unit housing, and is fixedly supported by a sealing gasket arranged at the connection between the center flange 112 at the bottom of the filter screen and the guide flange 1113 of the water inlet pipe, and the filter screen flange 1112, and the primary filter screen 1117, the secondary filter screen 1116, and the tertiary filter screen 1115 adopt filter holes 1111 of different mesh numbers; the biologically active wastewater entering from the water inlet 113 passes through the primary filter screen 1117, the secondary filter screen 1116 in sequence. , after filtering through the through holes of the three-stage filter screen 1115, the water flows out from the water outlet pipe 101 of the filter unit, which can prevent dirt from entering the water outlet pipe 101. Through step-by-step filtering, the filtering effect is good and the efficiency is high; and a filter screen sealing gasket 106 is arranged in the filter screen 111 and the filter unit shell, and a sealing gasket is arranged on the center flange 112 at the bottom of the filter screen and the guide flange 1113 of the water inlet pipe. There are sealing gaskets at the flanges of the ports of each level of the filter screen. The sealing method is reasonably configured to ensure the reliability of the system sealing and to ensure that there is no leakage to a maximum extent.

[0061] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0062] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A biological wastewater continuous filtration device, characterized in that: include: A first filter unit (1) and a second filter unit (2), each filter unit comprising a water inlet (113), a water outlet (101), an industrial steam inlet (110) for sterilization, and a filter screen (111); The water inlets (113) of the first filter monomer (1) and the second filter monomer (2) are both connected to the biological wastewater inlet pipe (6), and each water inlet (113) is provided with a biological wastewater inlet electric valve. The water outlets (101) of the first filter monomer (1) and the second filter monomer (2) are both connected to the inlet of the inactivation tank, and each water outlet (101) is provided with a biological wastewater discharge valve. An industrial steam electric valve is provided at the industrial steam inlet (110), and the inlet of the filter screen (111) is connected to the water inlet (113). The filtered wastewater and the sterilized condensed water are collected and discharged from the water outlet (101).

2. The biological wastewater continuous filtration device according to claim 1, characterized in that: The first filter unit (1) and the second filter unit (2) are both provided with pressure sensors for indicating the clogging status of the filter screen (111).

3. The biological wastewater continuous filtration device according to claim 1, characterized in that: The first filter unit (1) and the second filter unit (2) both comprise a compressed air inlet (109) for indicating the sealing condition of the filter unit.

4. The biological wastewater continuous filtration device according to claim 1, characterized in that: A hand hole cover (104) is provided at one end of each filter unit, and a sealing gasket is provided at the connection between the hand hole cover (104) and the filter unit.

5. The biological wastewater continuous filtration device according to claim 1, characterized in that: The filter screen (111) is a multi-layered screen structure arranged coaxially, and comprises, from the inside to the outside, a primary filter screen (1117), a secondary filter screen (1116), and a tertiary filter screen (1115); the primary filter screen (1117), the secondary filter screen (1116), and the tertiary filter screen (1115) have filter holes (1111) of different mesh sizes.

6. The biological wastewater continuous filtration device according to claim 5, characterized in that: A filter mesh sealing pad (106) is provided between the primary filter mesh (1117) and the water inlet (113), and at the ports of two adjacent filter meshes (111).

7. The biological wastewater continuous filtration device according to claim 1, characterized in that: Each of the water outlets (101) is provided with a condensate pipe (7) and a biological wastewater outlet pipe (8); the biological wastewater discharge valve is provided on the biological wastewater outlet pipe (8); the biological wastewater outlet pipe (8) is connected to the inlet of the inactivation tank; the condensate pipe (7) is respectively provided with a condensate discharge electric valve, a condensate filter and a steam trap.

8. The biological wastewater continuous filtration device according to claim 7, characterized in that: A condensate bypass is connected at both ends of the condensate pipeline (7), and a condensate electric bypass valve is arranged in the condensate bypass.

9. The biological wastewater continuous filtration device according to claim 1, characterized in that: The first filter unit (1) and the second filter unit (2) are both provided with a clean tap water inlet (108), and a tap water electric valve is provided at the tap water inlet (108).

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