CN214244125U

CN214244125U - Laboratory wastewater treatment system

Info

Publication number: CN214244125U
Application number: CN202023278488.4U
Authority: CN
Inventors: 杨华斌
Original assignee: Sichuan Jinlan Technology Co ltd
Current assignee: Sichuan Jinlan Technology Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-09-21
Anticipated expiration: 2030-12-29

Abstract

The utility model provides a laboratory effluent disposal system relates to sewage treatment technical field, and it includes collecting pit, elevator pump, acid-base neutralization pond, sedimentation tank, disinfection pond and the multi-media filter who connects gradually through the pipeline, and the top opening and the top of collecting pit are connected with handle formula filter screen. The acid-base neutralization tank is connected with a digital display PH measuring instrument, an acid liquid storage tank, an alkali liquid storage tank, a stirring device and a waste gas treatment device, and pipelines in the acid liquid storage tank and the alkali liquid storage tank which are led into the acid-base neutralization tank are respectively connected with a dosing metering pump. The problem of among the prior art laboratory waste water pollution be not conform to discharge standard greatly is solved.

Description

Laboratory wastewater treatment system

Technical Field

The utility model relates to a sewage treatment technical field especially relates to a laboratory effluent disposal system.

Background

With the development of science and technology, the demand on laboratories is increasing, and especially in recent decades, the number of laboratories of various types is increasing. The laboratory is actually a typical serious pollution source, the wastewater generated in the laboratory is generally directly discharged into an underground sewage pipe network without treatment or simple treatment and is sent to a large-scale domestic sewage treatment plant for centralized treatment, the facility of the domestic sewage treatment plant has no capacity for the wastewater due to the complex components of the wastewater in the laboratory, particularly contains a large amount of heavy metals and pathogenic pathogens such as bacteria, viruses, ova and the like, and can only be discharged into rivers finally, the drainage pipelines of a plurality of chemical laboratories are communicated with the drainage pipelines of residents, the pollutants finally flow into the rivers or permeate into the underground through the characteristics of cross contamination, acute infection and latent infection formed by the sewer, and the heavy metals can enter the human food chain through various ways after entering water sources or soil.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem among the prior art, the utility model provides a laboratory effluent disposal system has solved among the prior art problem that laboratory wastewater pollution is not conform to emission standard greatly.

In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows:

the utility model provides a laboratory effluent disposal system, it includes collecting pit, elevator pump, acid-base neutralization pond, sedimentation tank, disinfection pond and the multi-media filter who connects gradually through the pipeline, and the top opening and the top of collecting pit are connected with handle formula filter screen. The acid-base neutralization tank is connected with a digital display PH measuring instrument, an acid liquid storage tank, an alkali liquid storage tank, a stirring device and a waste gas treatment device, and pipelines in the acid liquid storage tank and the alkali liquid storage tank which are led into the acid-base neutralization tank are respectively connected with a dosing metering pump.

The utility model has the advantages that: the portable filter screen on the collecting tank can filter out large impurities in the sewage, and the blocking risk and the treatment burden in the subsequent sewage treatment are reduced; the sedimentation tank can remove impurities in the sewage, the disinfection tank can fully eliminate pathogenic microorganisms in the sewage, and the multi-medium filter can remove fine suspended matters, trace metals, organic matters and the like in the sewage; thereby making laboratory waste water can reach discharge standard, can not produce the damage to the environment.

The digital display PH measuring instrument on the acid-base neutralization tank can be usedThe PH value of the sewage is displayed, then the liquid medicine is put into the acid liquor storage tank or the alkali liquor storage tank for neutralization according to the PH value, the liquid medicine can be accelerated to be dissolved into the sewage by stirring of the stirring device, the efficiency is improved, and the PH value reaches the discharge standard; the waste gas treatment device can neutralize SO generated in the acid-base neutralization tank₂And NO₂And the acidic gas is discharged after reaction, so that the environmental protection property is improved.

Drawings

FIG. 1 is a schematic diagram of a laboratory wastewater treatment system.

FIG. 2 is a schematic diagram showing the internal structure of the collecting tank and the acid-base neutralization tank in FIG. 1.

Wherein, 1, a collecting pool; 11. a handle type filter screen; 111. a support frame; 112. a flange plate; 113. a handle; 114. a filter screen; 12. a sewage draining outlet; 2. an acid-base neutralization tank; 21. a PH measuring instrument is digitally displayed; 211. a measuring probe; 212. a digital display; 22. an acid liquor storage tank; 23. an alkali liquor storage tank; 24. an exhaust gas treatment device; 241. a U-shaped box; 242. a drying oven; 243. an exhaust fan; 25. a stirring device; 251. a stirring wheel; 252. a central shaft; 3. a sedimentation tank; 4. a disinfection tank; 5. a multi-media filter; 6. a lift pump.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all inventions contemplated by the present invention are protected.

As shown in fig. 1 and fig. 2, the laboratory wastewater treatment system comprises a collection tank 1, a lift pump 6, an acid-base neutralization tank 2, a sedimentation tank 3, a disinfection tank 4 and a multi-media filter 5 which are connected in sequence through pipelines. Waste water after the laboratory is used is collected through collecting pit 1, and elevator pump 6 makes waste water get into acid-base neutralization pond 2 for the waste water pressure boost, measures the pH value of waste water in acid-base neutralization pond 2, if waste water is acid then add alkali lye, if waste water is alkaline then add acidizing fluid, until the pH value with waste water is adjusted to neutrality. And the water discharged from the acid-base neutralization tank 2 enters a sedimentation tank, the separation of suspended matters and the water is realized in the sedimentation tank 3 through the counter-current flow between mud and water, and the precipitated suspended matters are discharged through a mud suction machine. The water discharged from the sedimentation tank 3 enters a disinfection tank 4, and a chlorine dioxide disinfectant is quantitatively added into the disinfection tank to fully eliminate pathogenic microorganisms in the sewage. The disinfected waste water finally enters a multi-media filter 5, fine suspended matters, trace metals, a very small amount of organic matters and the like which are not removed are removed, one part of the waste water is removed through physical and chemical actions such as adsorption, interception and the like of quartz sand and activated carbon with a huge pore structure and a specific surface area, the other part of the waste water is removed through degradation such as anaerobism, aerobism and facultative bacteria in a microbial film attached to the activated carbon, the activated carbon intercepts the adsorption, and the process of the adsorption and the microbial degradation is alternated, alternated and circularly carried out, so that the waste water can be discharged up to the standard.

The top end of the collecting tank 1 is open and is connected with a handle type filter screen 11. The handle type strainer 11 includes a support frame 111 inserted into the collection tank 1 with a gap, a flange plate 112 extending outward is fixed to a top end of the support frame 111, a handle 113 is fixed to the flange plate 112, and a strainer 114 is fixed to a bottom end of the support frame 111. The filter screen 114 filters large impurities such as packing bags in the wastewater, so as to prevent the large impurities from entering the system to cause blockage. The handle 113 is convenient to hold and take the handle type filter screen 11 off the collecting tank 1 to dump the filtered impurities. The flange plate 112 abuts on the opening end face of the collecting tank 1, and restricts the insertion of the handle type strainer 11, and at the same time, the handle type strainer 11 can be supported.

The bottom plate of the collecting tank 1 is an inclined plate, and the lower end of the inclined plate is provided with a sewage discharge outlet 12. Waste water is deposited in collecting pit 1, and mud in the waste water can be gathering on collecting pit 1's bottom plate, and drain 12 is used for discharging mud, and the tilting plate has improved the thoroughness of collecting pit 1 blowdown.

The acid-base neutralization tank 2 is connected with a digital display PH measuring instrument 21, an acid liquid storage tank 22, an alkali liquid storage tank 23, a stirring device 25 and a waste gas treatment device 24. The digital display PH measuring instrument 21 comprises a measuring probe 211 which is hermetically connected to the lower part of the acid-base neutralization tank 2 and a digital display 212 which is hung on the outer wall surface of the acid-base neutralization tank 2, wherein the digital display 212 is electrically connected with the measuring probe 211. The digital display 212 can display the pH value of the wastewater measured by the measuring probe 211 in real time, so as to obtain whether the wastewater is alkaline or acidic, and determine whether acid liquid or alkali liquid is added for neutralization. The pipelines of the acid liquor storage tank 22 and the alkali liquor storage tank 23 which are introduced into the acid-base neutralization tank 2 are respectively connected with dosing metering pumps, so that the opening of the acid liquor storage tank 22 and the opening of the alkali liquor storage tank 23 can be independently controlled. The dosing metering pumps connected to the acid liquor storage tank 22 and the alkali liquor storage tank 23 are respectively controlled by independent switch buttons, and the switch buttons are installed on the outer wall of the acid-base neutralization tank 2 so as to facilitate operation.

The stirring device 25 comprises a stirring wheel 251 transversely arranged in the acid-base neutralization tank 2, stirring blades are uniformly distributed on the stirring wheel 251 along the circumferential direction, the stirring wheel 251 is fixedly sleeved on a central shaft 252, two ends of the central shaft 252 are rotatably connected to the side wall of the acid-base neutralization tank 2, one end of the central shaft 252 is hermetically penetrated outside the side wall of the acid-base neutralization tank 2 and is connected with a rotating handle, the rotating handle is held to drive the stirring wheel 251 to rotate, and waste water is stirred through the stirring blades to accelerate the mixing of acid liquor or alkali liquor.

Because the components in the wastewater are complex, chemical reaction can possibly occur in the process of adding alkali liquor or acid liquor, and harmful gas SO is generated₂And NO₂And the top of the acid-base neutralization tank 2 is provided with an exhaust gas treatment device 24 for treating the generated harmful gas. The waste gas treatment device 24 is provided with a U-shaped box 241 filled with alkali liquor, the top of the acid-alkali neutralization pond 2 is communicated with the first top end of the U-shaped box 241, the second top end of the U-shaped box 241 is communicated with a drying box 242 filled with drying agent, and the outlet of the drying box 242 is connected with an exhaust fan 243. The exhaust fan 243 rotates to generate negative pressure, gas in the acid-base neutralization tank 2 is guided to sequentially pass through the U-shaped box 241 and the drying box 242 and then is discharged, the gas enters the first top end of the U-shaped box 241 and then must pass through alkali liquor to reach the second top end, and when the gas passes through the alkali liquor, the alkali liquor can be sodium oxide and SO₂And NO₂Sodium sulfite, water and nitric acid are respectively generated after the reaction of the sodium hydroxideSodium, sodium nitrite and water, and the residual harmless gas is dried by a drying agent and then discharged into the air.

Claims

1. A laboratory wastewater treatment system is characterized by comprising a collecting tank (1), a lifting pump (6), an acid-base neutralization tank (2), a sedimentation tank (3), a disinfection tank (4) and a multi-medium filter (5) which are sequentially connected through a pipeline, wherein the top end of the collecting tank (1) is opened and is connected with a handle type filter screen (11);

the acid-base neutralization tank (2) is connected with a digital display PH measuring instrument (21), an acid liquid storage tank (22), an alkali liquid storage tank (23), a stirring device (25) and a waste gas treatment device (24), and pipelines of the acid liquid storage tank (22) and the alkali liquid storage tank (23) which are led into the acid-base neutralization tank (2) are respectively connected with a dosing pump.

2. The laboratory wastewater treatment system according to claim 1, wherein the handle-type strainer (11) comprises a support frame (111) inserted into the collection tank (1) with a gap therebetween, a flange plate (112) extending outward is fixed to a top end of the support frame (111), a handle (113) is fixed to the flange plate (112), and a strainer (114) is fixed to a bottom end of the support frame (111).

3. Laboratory wastewater treatment system according to claim 1, characterized in that the floor of the collecting tank (1) is a sloping plate, the lower end of which is provided with a drain (12).

4. The laboratory wastewater treatment system according to claim 1, wherein the digital display PH meter (21) comprises a measuring probe (211) hermetically connected to the lower portion of the acid-base neutralization tank (2) and a digital display (212) suspended on the outer wall surface of the acid-base neutralization tank (2), and the digital display (212) is electrically connected with the measuring probe (211).

5. The laboratory wastewater treatment system according to claim 1, wherein the stirring device (25) comprises a stirring wheel (251) disposed in the acid-base neutralization tank (2), stirring blades are uniformly distributed on the stirring wheel (251) along the circumferential direction, and a central shaft (252) of the stirring wheel (251) extends out of the acid-base neutralization tank (2) in a sealing manner and is connected with a rotating handle.

6. The laboratory wastewater treatment system according to claim 1, wherein the waste gas treatment device (24) is provided with a U-shaped box (241) for containing alkali liquor, the top of the acid-base neutralization pond (2) is communicated with the first top end of the U-shaped box (241), the second top end of the U-shaped box (241) is communicated with a drying box (242) filled with drying agent, and an outlet of the drying box (242) is connected with an exhaust fan (243).

7. The laboratory wastewater treatment system according to claim 1, wherein the dosing metering pumps connected to the acid storage tank (22) and the lye storage tank (23) are respectively controlled by independent switch buttons mounted on the outer wall of the acid-base neutralization tank (2).