Sewage treatment device and system for measuring specific resistance of sludge

Abstract

The utility model relates to the technical field of sewage treatment, and provides a sewage treatment device and system for measuring the specific resistance of sludge. The sealing tank body comprises a tank body and a base, the tank body is connected with the base, a sample inlet is formed in the tank body, and a sealing cover is arranged on the sample inlet; a water collecting tank and a water collecting outlet are formed in the base and are communicated with each other; a nitrogen cylinder; the nitrogen cylinder is communicated with the sealed tank body through a gas inlet pipe. According to the utility model, the cost can be effectively reduced, the occupied area is reduced, and the noise problem in a laboratory environment is effectively controlled; furthermore, the sludge specific resistance can be accurately measured on line in real time, accurate dosing of traditional Chinese medicine in the sludge treatment process and dynamic control over operation parameters of dewatering equipment are achieved, the dosage is reduced, and energy consumption in the operation process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment device and system for measuring sludge specific resistance, which can be applied to parameter detection and optimization of sludge treatment systems in sewage treatment plants. Background Art

[0002] Sludge reduction treatment is an important link in the field of sewage treatment technology. Sludge specific resistance is a comprehensive indicator to measure the characteristics of sludge reduction treatment. Taking pretreatment measures such as adding chemicals to reduce sludge specific resistance can improve the dehydration efficiency of the sludge treatment system.

[0003] Since there are many types of sludge entering the sludge treatment system, including primary sludge, chemical sludge, residual sludge, etc., the sludge quality and sludge volume change irregularly. When the dosing method is adopted, the dosage and dehydrator equipment parameters need to be dynamically adjusted. Therefore, it is necessary to dynamically detect the sludge specific resistance. At present, the suction filtration Büchner funnel method is mainly used to measure the sludge specific resistance. In production practice, it is necessary to quickly and accurately calculate the sludge specific resistance and convert the sludge specific resistance into a digital signal. Through the automatic control program, the precise dosage of the drug and the dynamic adjustment of the dehydrator equipment parameters can be achieved.

[0004] At present, the measurement of sludge specific resistance is mainly carried out in the laboratory environment of the sewage treatment plant, and an air compressor is generally used to pressurize the sealed tank. The air compressor needs to be used in conjunction with an air storage tank, which is costly, occupies a large area, and produces relatively high noise during use.

[0005] In view of this, overcoming the defects of the prior art is an urgent problem to be solved in the field of this technology. Utility Model Content

[0006] The utility model provides a solution to the technical problems of high cost, large floor space and high noise in the prior art.

[0007] In a first aspect, the utility model provides a sewage treatment device for measuring sludge specific resistance, comprising:

[0008] A sealed tank body 1; the sealed tank body 1 comprises a tank body 2 and a base 5, the tank body 2 and the base 5 are fixedly connected, a sample inlet 3 is provided on the tank body 2, and a sealing cover 4 is provided on the sample inlet 3; a water collecting tank 6 and a water collecting outlet 8 are provided on the base 5, and the water collecting tank 6 and the water collecting outlet 8 are connected;

[0009] Nitrogen cylinder 20; the nitrogen cylinder 20 is connected to the sealed tank body 1 through the air inlet pipe 11.

[0010] Preferably, the tank body 2 and the base 5 are fixedly connected by a clamp 9 and bolts 10 .

[0011] Preferably, it also includes a pressure gauge 12 and a pressure control valve 13 , which are respectively arranged on the air inlet pipe 11 ; wherein the pressure control valve 13 is arranged near one end of the nitrogen bottle 20 .

[0012] Preferably, a nitrogen switch 14 is further included, and the nitrogen switch 14 is arranged on the air intake pipe 11 .

[0013] Preferably, the nitrogen switch 14 is arranged near one end of the sealed tank body 1 .

[0014] Preferably, a sealing ring 7 is further included, and the sealing ring 7 is arranged in the gap between the tank body 2 and the base 5 .

[0015] Preferably, it also includes a data acquisition unit, which is connected to the sealed tank body 1.

[0016] Preferably, the data acquisition unit includes a water collecting bottle 16 and an analytical balance 17 , and the water collecting bottle 16 is arranged above the analytical balance 17 ; wherein the water collecting bottle 16 is connected to the water collecting outlet 8 through a water collecting pipe 15 .

[0017] Preferably, it also includes a data calculation unit, which is communicatively connected with the data acquisition unit.

[0018] In a second aspect, the utility model provides a sewage treatment system for measuring sludge specific resistance, comprising the sewage treatment device for measuring sludge specific resistance described in the first aspect.

[0019] In view of the deficiencies in the prior art, the beneficial effects that can be achieved by the utility model are as follows:

[0020] The utility model replaces the air compressor by providing a nitrogen bottle, which can effectively reduce costs and floor space during application, and effectively control the noise problem in the laboratory environment.

[0021] Furthermore, the utility model can also measure the sludge specific resistance online in real time and accurately through the data acquisition unit and the data calculation unit, realize the precise dosage of medicine in the sludge treatment process and the dynamic control of the operating parameters of the dehydration equipment, reduce the amount of medicine added, and reduce the energy consumption during the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the embodiments of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work.

[0023] Figure 1It is a schematic diagram of the structure of a sewage treatment device and its system for measuring sludge specific resistance;

[0024] Figure 2 yes Figure 1 A schematic diagram of a local structure of

[0025] Figure 3 yes Figure 1 Another partial structural schematic diagram of .

[0026] In the accompanying drawings, the same reference numerals are used to denote the same components or structures, wherein:

[0027] 1-sealed tank body; 2-tank body; 3-inlet; 4-sealing cover; 5-base; 6-water collecting tank; 7-sealing ring; 8-water collecting outlet; 9-tightening hoop; 10-bolt; 11-inlet pipe; 12-pressure gauge; 13-pressure control valve; 14-nitrogen switch; 15-water collecting pipe; 16-water collecting bottle; 17-analytical balance; 18-data cable; 19-PC terminal; 20-nitrogen bottle. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0030] In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] In order to solve the technical problems of high cost, large floor space and high noise in the prior art, this embodiment provides a sewage treatment device for measuring sludge specific resistance, such as Figure 1-Figure 3As shown, it includes: a sealed tank body 1; the sealed tank body 1 is used to form a closed positive pressure space in the tank, the sealed tank body 1 includes a tank body 2 and a base 5, the tank body 2 and the base 5 are fixedly connected, preferably, the tank body 2 and the base 5 are fixedly connected by a clamp 9 and a bolt 10; an injection port 3 is provided on the tank body 2, the injection port 3 is used to dump sludge samples, and a sealing cover 4 is provided on the injection port 3, the sealing cover 4 is used to seal the injection port 3; a water collecting trough 6 and a water collecting outlet 8 are provided on the base 5, the water collecting trough 6 and the water collecting outlet 8 are connected; the water collecting trough 6 is used to collect the filtrate after the sludge is filtered by pressure, and the water collecting outlet 8 is used to transport the filtrate; a nitrogen bottle 20; the nitrogen bottle 20 is connected to the sealed tank body 1 through an air inlet pipe 11, and the air inlet pipe 11 is used to transport the nitrogen in the nitrogen bottle 20 to the sealed tank body 1.

[0032] In this embodiment, the nitrogen cylinder 20 is provided to replace the air compressor. During the application process, the cost and the floor space can be effectively reduced, and the noise problem in the laboratory environment can be effectively controlled.

[0033] In some of the optional implementations, the present embodiment provides a sewage treatment device for measuring sludge specific resistance, which also includes a pressure gauge 12, a pressure control valve 13, a nitrogen switch 14 and a sealing ring 7. The pressure gauge 12, the pressure control valve 13 and the nitrogen switch 14 are respectively arranged on the air inlet pipe 11. The pressure gauge 12 is used to record the pressure value in the sealed tank body 1, the pressure control valve 13 is used to control the pressure in the sealed tank body 1, and the nitrogen switch 14 is used to control the air intake; in order to achieve operational convenience, preferably, the pressure control valve 13 is arranged near one end of the nitrogen bottle 20, and the nitrogen switch 14 is arranged near one end of the sealed tank body 1; the sealing ring 7 is arranged in the gap between the tank body 2 and the base 5, and the sealing ring 7 is used to seal the gap between the tank body 2 and the base 5.

[0034] In order to measure the sludge specific resistance online in real time and accurately, the present embodiment provides a sewage treatment device for measuring the sludge specific resistance, which also includes a data acquisition unit and a data calculation unit. The data acquisition unit is communicatively connected to the data calculation unit via a data line 18, and the data acquisition unit is connected to the sealed tank body 1. In specific implementation, the data acquisition unit includes a water collecting bottle 16 and an analytical balance 17. The water collecting bottle 16 is arranged above the analytical balance 17, wherein the water collecting bottle 16 is connected to the water collecting outlet 8 via a water collecting pipe 15, the water collecting bottle 16 is used to collect all the filtrate, and the analytical balance 17 is used to weigh the mass of the filtrate; the data calculation unit includes a PC terminal 19, and the PC terminal 19 is used to record the curve of the filtrate mass and time.

[0035] Based on the same technical concept as above, this embodiment provides a sewage treatment system for measuring sludge specific resistance, including the above-mentioned sewage treatment device for measuring sludge specific resistance.

[0036] The Buchner funnel method measures the rate at which the sludge mixture passes through the filter medium under a set pressure, and further analyzes the resistance of the sludge cake per unit weight per unit filter area of ​​the filter medium, that is, R = 2pA. 2 b / (μ·C), where R is the sludge resistance, p is the pressure, A is the filtration area, b is the slope of the straight line of the ratio of filtration time T to filtrate volume V T / VV, μ is the filtrate viscosity, C is the solid concentration of the filter cake after filtering a unit volume of filtrate, and C can be calculated by the formula C=1000*C 0 C b / (C 0 -C b ) is obtained, where C 0 - Raw sludge solid concentration, C b- Filter cake concentration after filtration.

[0037] According to the above calculation process, the present embodiment provides a sewage treatment device and system for measuring sludge specific resistance, and the application process is as follows:

[0038] (1) Open the PC terminal 19 and the analytical balance 17, wet the medium-speed filter paper and place it on the base 5, place the sealing ring 7 between the tank body 2 and the base 5, and tighten the tank body 2 and the base 5 with the clamp 9 and the bolt 10;

[0039] (2) Adjust the pressure regulating valve 13 so that the pressure gauge 12 shows a fixed value p (e.g. 60 KPa);

[0040] (3) Pour the sludge sample into the sample inlet 3 and then seal it with a sealing cap 4;

[0041] (4) Open the pressure control valve 13, the nitrogen switch 14 and the calculation software of the analytical balance 17;

[0042] (5) Draw the T / VV straight line based on the TV curve data (T is 5S interval timing) and obtain the slope b.

[0043] (6) After filtration, the filter cake was placed in an oven (drying temperature was 105°C) and the solid concentration of the filter cake was measured. b , then by the formula C = 1000*C 0 C b / (C 0 -C b ) The solid concentration C of the filter cake after filtering a unit volume of filtrate is obtained. The sludge specific resistance R = 2pA is obtained by using the previously obtained b, C, the set pressure p, the filtration area A (the area inside the sealed tank 1) and the filtrate viscosity μ. 2 b / (μ·C);

[0044] (7) The sludge specific resistance R is used as a dynamic instruction to realize the dynamic control of the precise dosage of medicine in the sludge treatment process and the operating parameters of the dehydration equipment through the automatic control PLC device.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewage treatment device for measuring sludge specific resistance, It is characterized in that include: A sealed tank body (1); the sealed tank body (1) comprises a tank body (2) and a base (5); the tank body (2) and the base (5) are fixedly connected; a sample inlet (3) is provided on the tank body (2); and a sealing cover (4) is provided on the sample inlet (3); a water collecting groove (6) and a water collecting outlet (8) are provided on the base (5); the water collecting groove (6) and the water collecting outlet (8) are connected; A nitrogen bottle (20); the nitrogen bottle (20) is connected to the sealed tank body (1) through an air inlet pipe (11).

2. The sewage treatment device for measuring sludge specific resistance according to claim 1, It is characterized in that The tank body (2) and the base (5) are fixedly connected by a clamp (9) and bolts (10).

3. The sewage treatment device for measuring sludge specific resistance according to claim 1, It is characterized in that It also comprises a pressure gauge (12) and a pressure control valve (13), wherein the pressure gauge (12) and the pressure control valve (13) are respectively arranged on the air inlet pipe (11); wherein the pressure control valve (13) is arranged at one end close to the nitrogen bottle (20).

4. The sewage treatment device for measuring sludge specific resistance according to claim 3, It is characterized in that It also includes a nitrogen switch (14), which is arranged on the air inlet pipe (11).

5. The sewage treatment device for measuring sludge specific resistance according to claim 4, It is characterized in that The nitrogen switch (14) is arranged near one end of the sealed tank body (1).

6. The sewage treatment device for measuring sludge specific resistance according to claim 1, It is characterized in that It also comprises a sealing ring (7), which is arranged in the gap between the tank body (2) and the base (5).

7. The sewage treatment device for measuring sludge specific resistance according to claim 1, It is characterized in that It also comprises a data collection unit, which is connected to the sealed tank body (1).

8. The sewage treatment device for measuring sludge specific resistance according to claim 7, It is characterized in that The data collection unit comprises a water collection bottle (16) and an analytical balance (17), wherein the water collection bottle (16) is arranged above the analytical balance (17); wherein the water collection bottle (16) is connected to a water collection outlet (8) via a water collection pipe (15).

9. The sewage treatment device for measuring sludge specific resistance according to claim 7, It is characterized in that It also includes a data calculation unit, which is communicatively connected with the data acquisition unit.

10. A sewage treatment system for measuring sludge specific resistance, It is characterized in that A sewage treatment device for measuring sludge specific resistance comprising any one of claims 1-9.

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