CN200992514Y - Waste water treating and concurrently classified collecting device for chemical laboratory - Google Patents

Abstract

The utility model relates to a chemical laboratory wastewater treatment and classification collection device, which is composed of a wastewater classification collection tank, a wastewater adjustment tank, a high-level reaction tank and a settling tank, wherein the wastewater classification collection tank is composed of six waste water classification collection tanks, The pipelines with control valves are respectively connected to the regulating tank; the regulating tank is connected to the high-level reaction tank through a pipeline with a control valve and a sewage lifting pump, the outlet pipe of the high-level reaction tank is connected to the settling tank, and the overflow pipe of the settling tank is connected to the sand The filter is connected, and the top of the sand filter is connected with a clean water discharge pipe with a control valve. The device has the advantages of being able to centrally classify and collect waste water in a chemical laboratory, improve the treatment effect, backwash waste water, and achieve effective treatment without the need to invest a large amount of fresh chemicals. The utility model has the advantages of simple structure, convenient use and low production cost, which fully embodies the idea of "controlling pollution with pollution", and has been widely promoted and applied in chemical laboratory wastewater treatment.

Description

Chemical laboratory wastewater treatment and classification collection device

technical field

The utility model relates to a wastewater treatment and classification collection device, in particular to a chemical experiment wastewater treatment and classification collection device.

Background technique

At present, the waste water and waste liquid produced by the chemical laboratories of many schools and scientific research institutes in our country are not strictly treated and discharged into the urban domestic sewage pipe network or rivers, which has a great load impact on urban sewage plants, especially heavy metals and refractory The discharge of organic matter will seriously pollute the environment and threaten people's health. The characteristics of chemical laboratory wastewater discharge are: intermittent, relatively small amount, complex and changeable water quality components, and high hazard. The wastewater treatment methods, processes and equipment currently used in industry have the characteristics of large hydraulic load, relatively simple wastewater components, continuous operation, high equipment costs and high operating costs, and are not suitable for the treatment of chemical laboratory wastewater.

At present, there are also wastewater treatment devices that have obtained patent authorization for laboratory wastewater. For example, ZL02211281.2 is mainly composed of liquid collection tanks, sewage pumps, adsorption filter tanks, and water purification tanks; ZL200420018566.9 is mainly composed of stirring tanks, pumps, Suspended matter filter, organic matter filter and other components are connected. The treatment effects of these devices are not good, and their shortcomings are as follows: 1. These devices combine or simply divide all experimental wastewater into two categories for comprehensive treatment through the same process, but the complexity of laboratory wastewater quality will be greatly reduced. Treatment effect; 2. According to the generation and discharge characteristics of laboratory wastewater, the collection of wastewater cannot be avoided, and only centralized and classified collection can be effectively treated, and these devices do not fully consider these factors; 3. These devices are filtering There are a lot of filter residues produced in the process, and the cleaning amount of filter residues or the amount of backwash water is very large, and the treatment of backwash wastewater is not considered; 4. These devices do not reflect the idea of "using pollution to control pollution" and require a large amount of fresh chemicals.

Contents of the invention

The purpose of this utility model is to overcome the above defects and provide a device that can collect and classify waste water in a chemical laboratory, improve the treatment effect, backwash waste water, and can effectively treat the waste water without inputting a large amount of fresh chemicals.

The technical scheme adopted to achieve the above purpose includes: it is composed of a waste water classification collection tank, a waste water regulating tank, a high-level reaction tank and a settling tank. Ion waste water tank, waste alkali tank, organic waste water tank, other inorganic waste water tank, spare tank; each collection tank is a regular triangular prism, and they are put together together to form a regular hexagonal prism. Each collecting tank is provided with a waste water collecting conduit, the conduit inlet is arranged at the top of the regular triangular prism, and the conduit outlet is arranged at the middle and lower part of the regular triangular prism. The conduit inlets are respectively: the conduit port of the waste acid tank, the conduit port of the heavy metal ion wastewater tank, the conduit port of the waste alkali tank, the conduit port of the organic wastewater tank, the conduit port of other inorganic wastewater tanks, and the backup tank conduit port.

The bottom of each collection tank is connected to the regulating tank through a pipeline with a control valve. The bottom surface of the adjustment tank is an inclined surface with a horizontal angle of 15°. The bottom of the adjustment tank is set in the ground tank. The inlet pipe of the sewage lifting pump is set at the lower right corner of the adjustment tank. The outlet pipe is connected to the control valve and then connected to the high-level reaction tank. The high-level reaction tank is equipped with an agitator, and its top is equipped with a drug injection port. The outlet pipe at the lower left end of the high-level reaction tank is connected to the control valve, and then connected to the center pipe of the sedimentation tank. The outlet of the center pipe is trumpet-shaped, and a gear is set at the outlet. plate. The upper part of the settling tank is equipped with a layer of sloping plate with a horizontal inclination angle of 60°, the lower part of the settling tank is an inverted cone, and the bottom of the settling tank is connected to the mud discharge pipe.

The upper right end of the settling tank is connected with an overflow pipe with a control valve, the lower end of the overflow pipe is connected with the water inlet pipe at the bottom of the sand filter, and the top of the sand filter is connected with a clean water discharge pipe with a control valve. In addition, the top of the sand filter is also connected with a backwash water inlet pipe with a control valve, and the bottom is connected with a backwash water outlet pipe with a control valve.

Compared with the prior art, the utility model has the advantages that,

1. The device comprehensively classifies and treats all laboratory wastewater through different technological processes, so that the complexity of laboratory wastewater quality will greatly improve the final treatment effect;

2. According to the generation and discharge characteristics of laboratory wastewater, the collection of wastewater is unavoidable, and appropriate centralized and classified collection forms the best treatment.

3. This device produces very little filter residue during the filtration process, and the cleaning amount of filter residue or the amount of backwash water is very small, and the backwash wastewater is fully and reasonably treated.

4. Fully embodies the idea of "pollution control with pollution", and does not need to invest a lot of fresh chemicals;

Description of drawings

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

Figure 2 is a top plan view of the waste water classification collection tank.

Figure 3 is a bottom view of the wastewater classification collection tank.

Detailed ways

As shown in Figure 1, Figure 2 and Figure 3, in this example, its structure is composed of waste water classification collection tank 16, regulating tank 1, high-level reaction tank 6 and settling tank 10, wherein the waste water classification collection tank consists of 6 waste water classification collection tanks A, B, C, D, E, F consist of: waste acid tank A, heavy metal ion waste water tank B, waste alkali tank C, organic waste water tank D, other inorganic waste water tank E, spare tank F; each collection The tanks are regular triangular prisms with the same shape, and they are put together to form a regular hexagonal prism as a whole. Each collection tank is equipped with a waste water collection conduit, which enters from the top opening, and the conduit ports are: waste acid tank conduit port a, heavy metal ion wastewater tank conduit port b, waste alkali tank conduit port c, organic waste water tank conduit port d, Other inorganic waste water tank conduit ports e and standby tank conduit ports f can lead waste water of different properties into corresponding collection tanks from different conduit ports. The pipes with control valves at the bottom of each collection tank are connected to the adjustment pool 1, and the corresponding control valves are opened, and the waste water can enter the low-level adjustment pool 1 individually or in combination. In this way, each kind of wastewater can be treated separately, and can also be combined and treated according to the composition of each wastewater; in addition, the pH value of the wastewater in the adjustment pool 1 can be adjusted through the waste acid tank A and the waste alkali tank B to make it reach the optimum range, so that Not only can the treatment effect be improved independently, but also the flexibility of the treatment method is not lacking, and the purpose of "pollution control with pollution" can also be achieved.

The bottom surface of the adjustment pool 1 is an inclined surface with a horizontal angle of 15°, the bottom of the adjustment pool 1 is arranged in the ground trough, and the lower right corner of the adjustment pool 1 is connected with a drain pipe. After the adjustment is completed, the waste water is lifted to the high-level reaction tank 6 through the sewage lifting pump 2, the agitator 4 in the high-level reaction tank 6 is started, and the corresponding oxidant, reducing agent, flocculant or coagulant and other agents are injected from the dosing port 5, A chemical reaction occurs in the elevated reaction tank 6 to generate hydroxide, sulfide, flocculent precipitates, and the like. After the reaction is completed, the waste water enters the center pipe 7 through the outlet pipe 3 with a control valve, and the waste water in the center pipe 7 slowly enters the settling tank 10 . In order to enhance the settling effect, a large-diameter settling tank is required. The upper part of the settling tank 10 is provided with a layer of inclined plate 9 with a horizontal inclination angle of 60°, and the lower half is set as an inverted cone, where the sludge is deposited. In addition, the settling tank 10 also has temporary storage capacity. function of sludge. Periodically, the settling tank 10 opens its bottom mud discharge pipe 15 to discharge mud, allowing the sludge to enter the solid waste treatment system.

The supernatant liquid in the upper layer of the settling tank 10 flows out from the overflow pipe 8 and enters the sand filter 13 from the water inlet pipe at the bottom of the sand filter 13. Wastewater flows slowly from bottom to top in the sand filter 13, and the filtrate is directly discharged from the clean water discharge pipe 12. Since the whole process is a batch operation, the sedimentation and filtration speed is very slow, the treatment effect is very good, and its energy consumption is low, so it is very suitable for chemical laboratory wastewater treatment.

The sand filter 13 needs to be regularly backwashed, and the backwash water enters the sand filter 13 from the backwash inlet pipe 11 with a control valve, the waste water flows from top to bottom, and the backwash waste water enters the backwash with a control valve from the bottom of the sand filter 13 The outlet pipe 14 enters the regulating tank 1 . Since the filter is preceded by a settling tank 10, the backwashing cycle is relatively long; in addition, the backwashing water enters the regulating tank 1, and the filter residue is removed through sedimentation. The whole process is very environmentally friendly.

Wherein in the backwashing stage, the control valves on the backwashing water inlet pipe 11 and the backwashing water outlet pipe 14 are in an open state; the control valves on the overflow pipe 8 and the clean water discharge pipe 12 are in a closed state. When in the non-backwash stage, the control valves on the backwash water inlet pipe 11 and the backwash outlet pipe 14 are closed; the control valves on the overflow pipe 8 and the clean water discharge pipe 12 are open.

The specific implementation process is as follows: the laboratory can temporarily store the wastewater in the corresponding collection tank according to the type of wastewater generated each time, and when a certain amount is collected, the subsequent devices will be activated for centralized treatment.

If wastewater containing heavy metal ions is to be treated, open the bottom control valve of heavy metal ion wastewater tank B to allow the wastewater to enter the low-level regulating tank 1, and then slowly open the bottom control valve of waste acid tank A or waste alkali tank C according to the chemical properties of heavy metal ions in the wastewater , so that the pH of the solution in the regulating tank 1 reaches the optimum range, and the waste liquid in other collection tanks can be used as a regulating agent as required. Then start the sewage lifting pump 2, send the waste water in the regulating tank 1 into the high-level reaction tank 6, start the agitator 4, and put in the necessary flocculant, coagulant or other agents from the dosing port 5, and generate in the high-level reaction tank 5. The chemical reaction generates hydroxide, sulfide, floc, etc., and the control valve on the outlet pipe 3 is opened after a certain period of time, and the waste water flows into the central pipe 7, and the waste water in the central pipe 7 slowly enters the sedimentation tank 10, and the sediment is Sedimentation at the bottom of the settling tank 10 . The supernatant liquid enters the sand filter 13 from the overflow pipe 8, and the filtrate comes out from the top of the sand filter 13 and is directly discharged through the clean water discharge pipe 12.

If organic waste water is to be treated, open the control valve at the bottom of organic waste water tank D to allow the organic waste water to enter the low-level regulating tank 1, and then slowly open the control valve at the bottom of waste acid tank A or waste alkali tank C according to the chemical properties of the organic matter in the waste water to make the regulating tank The pH of the solution in 1 reaches the optimal range, and the waste liquid in other collection tanks can be used as a regulator according to needs. Start the sewage lifting pump 2 again, send the wastewater in the regulating tank 1 into the high-level reaction tank 6, start the agitator 4, and put in oxidant, lime water, flocculant, etc. from the dosing port 5, and redox reaction occurs for decomposition and neutralization reaction , generate precipitation, react to a certain period of time and open the control valve on the outlet pipe 3, the waste water flows into the central pipe 7, the waste water in the central pipe 7 slowly enters the settling tank 10, and the sediment deposits at the bottom of the settling tank 10. The supernatant liquid flows out from the overflow pipe 8 and enters the sand filter 13, and the filtrate flows out from the top of the sand filter 13 and is directly discharged through the clean water discharge pipe 12.

Claims (7)

1. A chemical laboratory wastewater treatment and classification collection device, characterized in that: it is composed of a wastewater classification collection tank (16), a regulating tank (1), a high-level reaction tank (6) and a settling tank (10), wherein the wastewater classification The collection tank (16) is composed of 6 waste water classification collection tanks (A), (B), (C), (D), (E), and (F), respectively using the pipeline with the control valve and the regulating tank (1) The regulating pool (1) is connected to the high-level reaction tank (6) through the pipeline with the control valve and the sewage lifting pump (2), and the outlet pipe (3) of the high-level reaction tank (6) is connected to the settling tank (10). The overflow pipe (8) of the settling tank (10) is connected to the sand filter (13), and the top of the sand filter (13) is connected to a clean water discharge pipe (12) with a control valve. 2. The chemical laboratory wastewater treatment and classification collection device according to claim 1, characterized in that: wherein 6 wastewater classification collection tanks (A), (B), (C), (D), (E), (F) are: waste acid tank (A), heavy metal ion waste water tank (B), waste alkali tank (C), organic waste water tank (D), other inorganic waste water tank (E), spare tank (F), each The bottom of each collection tank is connected to the regulating tank (1) through a pipeline with a control valve. 3. The chemical laboratory wastewater treatment and classification collection device according to claim 1, characterized in that: the bottom surface of the adjustment pool (1) is an inclined surface with a horizontal angle of 15°, and the bottom of the adjustment pool (1) is set in the ground trough Among them, the lower right corner of the regulating tank (1) is provided with the inlet pipe of the sewage lifting pump (2). 4. The chemical laboratory wastewater treatment and classification collection device according to claim 1, wherein the settling tank 10 is a large-diameter settling tank, and its upper part is provided with a layer of inclined plates (9) with a horizontal inclination angle of 60°. The lower half is an inverted cone, its upper right end is connected with an overflow pipe (8) with a control valve, and its bottom is connected with a mud discharge pipe (15). 5. The chemical laboratory wastewater treatment and classification collection device according to claim 1, characterized in that: the backwash outlet pipe (14) with a control valve at the bottom of the sand filter (13) is connected to the regulating tank (1). 6. The chemical laboratory wastewater treatment and classification collection device according to claim 1 or 2, characterized in that: wherein 6 wastewater classification collection tanks (A), (B), (C), (D), (E ), (F) are all regular triangular prisms, and they are put together together to form regular hexagonal prisms. 7. The chemical laboratory wastewater treatment and classification collection device according to claim 1 or 2, characterized in that: 6 wastewater classification collection tanks (A), (B), (C), (D), (E ), (F) are equipped with waste water collection conduits, the conduit inlet is located at the top of the regular triangular prism, and the conduit outlet is located at the middle and lower part of the regular triangular prism. The conduit inlets are respectively: waste acid tank conduit port (a), heavy metal ion waste water tank conduit port ( b), Conduit port of waste alkali tank (c), conduit port of organic waste water tank (d), conduit port of other inorganic waste water tanks (e), spare tank conduit port (f).

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