Device for accurately adding bactericide into effluent of town sewage plant

Abstract

The utility model discloses a device for accurately adding a bactericide into effluent of a town sewage plant, and belongs to the technical field of sewage treatment. The device comprises a medicament storage tank, a tap water storage tank, a medicament mixing tank and a stirrer, high-liquid-level and low-liquid-level online detectors are arranged in the medicament storage tank, the tap water storage tank and the medicament mixing tank, and medicament flowmeters are arranged on outlet pipelines of the high-liquid-level and low-liquid-level online detectors and used for detecting flow. The rotating speeds of the agent pump A, the water pump B and the agent pump C are controlled through the central processing unit to regulate and control the adding amount of the agent, so that the accurate adding of the bactericide for the effluent of the urban sewage plant is realized. The addition amount is accurately controlled, so that the situation that the medicament is wasted due to excessive addition and the corresponding sterilization effect cannot be achieved due to insufficient addition is avoided.

Description

Technical Field

[0001] The utility model relates to a device for accurately adding bactericide to the effluent of an urban sewage treatment plant, which belongs to the technical field of sewage treatment. Background Technique

[0002] The effluent of the sewage treatment plant must be disinfected because the sewage contains a large number of microorganisms, including bacteria harmful to humans, oocysts and worms of protozoa, viruses, etc. The inspection work of many harmful microorganisms is very heavy. In order to more quickly detect the harmful microorganisms in the sewage, the number of fecal coliforms is used as an indicator of the biological hazard of the sewage treatment plant. The sewage treatment plant must be disinfected and sterilized before being discharged. Many urban sewage treatment plants generally use bactericide addition to sterilize the effluent, but inaccurate addition of bactericide is likely to cause inappropriate addition ratio, which will cause waste of the agent on the one hand and fail to achieve the sterilization effect on the other hand. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the utility model provides a device for accurately adding bactericide to the effluent of an urban sewage treatment plant, and accurately controls the dosage of the added medicine through this device.

[0004] The technical solution adopted by the utility model to solve the problems of the prior art: A device for accurately adding bactericide to the effluent of an urban sewage treatment plant, which includes a medicine storage tank and a medicine mixing tank. A feed valve is arranged on the inlet pipe of the medicine storage tank, and the outlet of the medicine storage tank is sequentially connected to the medicine mixing tank after passing through a medicine pump A and a medicine flowmeter A;

[0005] A tap water storage tank is also provided in the device. A tap water storage tank inlet valve is arranged on its water inlet pipe, and the outlet of the tap water storage tank is sequentially connected to the medicine mixing tank after passing through a water pump B and a tap water flowmeter B;

[0006] A medicine pump C and a mixed medicine flowmeter C are sequentially arranged on the outlet pipe of the medicine mixing tank;

[0007] The device also has a central processor, which is electrically connected to the medicine pump A, the medicine flowmeter A, the water pump B, the tap water flowmeter B, the medicine pump C and the mixed medicine flowmeter C.

[0008] A medicine storage tank low-level online detector and a medicine storage tank high-level online detector are arranged in the medicine storage tank, and both are electrically connected to the central processor.

[0009] A tap water storage tank low-level detector and a tap water storage tank high-level detector are arranged in the tap water storage tank, and both are electrically connected to the central processor.

[0010] A mixing tank high-level online detector and a low-level online detector are arranged in the medicine mixing tank, and both are electrically connected to the central processor.

[0011] A stirrer is provided in the chemical mixing tank.

[0012] The beneficial effects of the present utility model are as follows: The device includes a chemical storage tank, a tap water storage tank, a chemical mixing tank and a stirrer. High-level and low-level on-line detectors are provided in the chemical storage tank, the tap water storage tank and the chemical mixing tank, and chemical flow meters are provided on their outlet pipes to calculate the flow rate. The device uses high-level and low-level on-line detectors, chemical flow meter A, tap water flow meter B and mixed chemical flow meter C for on-line real-time monitoring. By controlling the rotation speeds of chemical pump A, water pump B and chemical pump C through the central processor, the addition amount of chemicals is regulated, so as to realize the accurate dosing of the bactericide for the effluent of the urban sewage treatment plant. The accurate control of the dosing amount can avoid waste of chemicals caused by excessive dosing, and insufficient dosing cannot achieve the corresponding bactericidal effect. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of a device for accurately dosing bactericide for the effluent of an urban sewage treatment plant.

[0014] Figure 2 It is the system schematic diagram of the central processor.

[0015] In the figure: 1, feed valve; 2, chemical storage tank; 3, low-level on-line detector of chemical storage tank; 4, high-level on-line detector of chemical storage tank; 5, chemical pump A; 6, chemical flow meter A; 7, inlet valve A of chemical mixing tank; 8, chemical mixing tank; 9, stirrer; 10, high-level on-line detector of mixing tank; 11, low-level on-line detector of mixing tank; 12, outlet of chemical pump C; 13, mixed chemical flow meter C; 14, effluent channel; 16, inlet valve of tap water storage tank; 17, tap water storage tank; 18, low-level detector of tap water storage tank; 19, high-level detector of tap water storage tank; 20, inlet valve of water pump B; 22, outlet valve of water pump B; 23, tap water flow meter B; 24, inlet valve B of chemical mixing tank; 25, inlet valve of chemical pump C; 26, chemical pump C; 27, central processor; 28, operation panel of central processor; 29, inlet valve of chemical pump A; 30, outlet valve of chemical pump A. Detailed Embodiments

[0016] The present utility model will be described below in conjunction with the drawings and specific embodiments:

[0017] Figure 1 The structure diagram of a device for accurately dosing bactericide for the effluent of an urban sewage treatment plant is shown. In the figure, the chemical dosing tank 2, the chemical mixing tank 8 and the tap water storage tank 17 in the device for accurately dosing bactericide for the effluent of an urban sewage treatment plant are all made of PE material, and the volume of the three is about 20m 3, The agitator 9 is made of 316 stainless steel. The chemical pumps A30 and C26 are acid-resistant frequency modulation metering pumps. The output flow rates of the chemical pumps A30 and C26 and the water pump B21, as well as the start and stop of the pumps, are achieved through the central processor 27. The on-line low liquid level detector 3 of the chemical storage tank, the on-line high liquid level detector 4 of the chemical storage tank, the chemical flowmeter A6, the on-line high liquid level detector of the mixing tank, 11, the on-line low liquid level detector 10 of the mixing tank, the mixed chemical flowmeter C13, 18, the on-line low liquid level detector 18 of the tap water storage tank, the on-line high liquid level detector 19 of the tap water storage tank, and the data of the tap water flowmeter B23 are all transmitted to the central processor 27. The inlet valve 29 of the chemical pump A, the outlet valve 30 of the chemical pump A, the inlet valve A7 of the chemical mixing tank, the agitator 9, the outlet valve 12 of the chemical pump C, the inlet valve 20 of the water pump B, the inlet valve 22 of the water pump B, the inlet valve B of the chemical mixing tank, the inlet valve B24 of the chemical mixing tank, and the inlet valve 25 of the chemical pump C are started and stopped through the central processor 27.

[0018] The rotation speeds of the chemical pump A, the water pump B, and the chemical pump C are controlled by the central processor to regulate the dosage of the chemical; the central processor 27 calculates the concentration of the chemical in the chemical mixing tank 8 according to the data of the chemical flowmeter A6 and the tap water flowmeter B23; and then according to the concentration of the chemical in the chemical mixing tank 8 and the data of the mixed chemical flowmeter C13, the accurate dosage of the dosing device can be obtained. The calculation of the diluted chemical concentration and the calculation of the chemical dosage both utilize the basic calculation function of the central processor and belong to the prior art.

[0019] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An apparatus for precisely adding a bactericide to the effluent of a municipal sewage treatment plant, which comprises a chemical storage tank (2) and a chemical mixing tank (8), and is characterized in that: A feed valve (1) is provided on the inlet pipe of the chemical agent storage tank (2), and the outlet of the chemical agent storage tank (2) is connected to the chemical agent mixing tank (8) after passing through the chemical agent pump A (5) and the chemical agent flowmeter A (6) in sequence; A tap water storage tank (17) is also provided in the device. A tap water storage tank inlet valve (16) is provided on its inlet pipe, and the outlet of the tap water storage tank (17) is connected to the chemical agent mixing tank (8) after passing through the water pump B (21) and the tap water flowmeter B (23) in sequence; A chemical agent pump C (26) and a mixed chemical agent flowmeter C (13) are sequentially provided on the outlet pipe of the chemical agent mixing tank (8); The device also has a central processing unit (27), which is electrically connected to the chemical agent pump A (5), the chemical agent flowmeter A (6), the water pump B (21), the tap water flowmeter B (23), the chemical agent pump C (26), and the mixed chemical agent flowmeter C (13).

2. The device for precisely adding bactericide to the effluent of an urban sewage treatment plant according to claim 1, characterized in that: A chemical agent storage tank low-level on-line detector (3) and a chemical agent storage tank high-level on-line detector (4) are provided in the chemical agent storage tank (2), and both are electrically connected to the central processing unit (27).

3. The device for precisely adding bactericide to the effluent of a municipal sewage treatment plant according to claim 1, characterized in that: A tap water storage tank low-level detector (18) and a tap water storage tank high-level detector (19) are provided in the tap water storage tank (17), and both are electrically connected to the central processing unit (27).

4. The device for accurately dosing fungicide into the effluent of a municipal sewage treatment plant according to claim 1, characterized in that: A mixing tank high-level on-line detector (10) and a low-level on-line detector (11) are provided in the chemical agent mixing tank (8), and both are electrically connected to the central processing unit (27).

5. The device for precisely adding bactericide to the effluent of an urban sewage treatment plant according to claim 1, wherein: A stirrer (9) is provided in the chemical agent mixing tank (8).

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