An integrated treatment device for easily foaming and malodorous liquids

Abstract

The present invention discloses a comprehensive treatment device for easily foaming and malodorous liquids, comprising an energy dissipation tank, a defoaming unit and a deodorizing unit; one end of the energy dissipation tank is provided with a leachate inlet, the other end of the energy dissipation tank is provided with a leachate outlet, the top of the energy dissipation tank is connected to the defoaming unit through a foam overflow pipe, the bottom of the defoaming unit is provided with a reflux pipe, the reflux pipe is connected to the leachate outlet, the top of the defoaming unit is connected to the deodorizing unit through a gas delivery pipe, and a blower is provided on the gas delivery pipe. The structure of the present invention is simple, with the functions of reducing potential, defoaming and deodorizing, and has low construction cost, convenient operation and easy implementation, and is particularly suitable for small leachate collection wells in landfill sites and underground sewage collection tanks in sewage treatment plants.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of garbage treatment, and particularly relates to a comprehensive treatment device for easily foaming and malodorous liquids. Background Art

[0002] Our company's existing domestic waste landfill has been closed, and all domestic waste is used for incineration power generation. The landfill project is equipped with a landfill leachate treatment project, which still generates about 1000 - 2000 m 3 / d of leachate, with a COD cr content of 2 - 4 g / L and an ammonia nitrogen content of 1.5 - 2.5 g / L, and the C / N is seriously insufficient. To solve the problem of insufficient carbon source, a special pipeline for leachate transportation is used to transport the high-organic leachate from the incineration project to the raw liquid pool of the landfill leachate treatment project, and it is treated after being evenly mixed with the old leachate. The COD of the incineration leachate cr content is 40 - 65 g / L, the ammonia nitrogen content is 1 - 2 g / L, and the SS content is 1 - 5 g / L. Figure 1 is the process flow chart of the leachate treatment after water quality blending.

[0003] The problems existing in the current situation are analyzed as follows:

[0004] (1) The incineration project and the landfill project are located in two places, and the incineration project is about 150 meters higher than the landfill project in terms of terrain, and the distance is about 3 km apart. It is very difficult to achieve full sealing of the raw liquid pool due to the pressure formed by the terrain difference. Therefore, there is a problem of the odor of landfill leachate drifting around the raw liquid pool. The substances that produce the odor of landfill leachate are mainly composed of carbon, nitrogen, and sulfur. Most of the odor substances are organic compounds, and only a few are inorganic compounds. According to relevant information, in terms of composition, the concentration of ammonia is the highest, followed by hydrogen sulfide. Hydrogen sulfide is one of the main substances that produce the malodorous smell and is also the main source of the malodorous smell. At present, the main means of treating malodor at home and abroad are: 1. Direct combustion method; 2. Catalytic oxidation method; 3. Ozone deodorization method; 4. Activated carbon adsorption method; 5. Liquid medicine spraying method, etc.; 6. Biological deodorization method, etc. However, single treatment equipment has problems to varying degrees, such as high equipment investment, high operating cost, small treatment gas volume, unstable operation, and low deodorization efficiency.

[0005] (2) As the use time of the raw liquid pool extends, a large amount of suspended matter accumulates at the bottom of the raw liquid pool to form silt, reducing the effective volume of the raw liquid pool. Therefore, it is necessary to regularly clean the silt in the raw liquid pool. Since the water quality blending with incineration leachate began, the silt cleaning cycle of our company's raw liquid pool has changed from the original 2 - 3 years / time to 1 year / time, and the raw liquid pool body belongs to an underground closed structure, making it extremely difficult to carry out the silt cleaning work in the raw liquid pool.

[0006] (3) Due to the presence of a large amount of polypeptides, proteins, and some surfactant substances in the landfill leachate, the raw liquid pool often bubbles and the bubbles are not easily dissipated. At present, the main method is to manually flush to break up the foam for treatment, which causes great difficulties to the surrounding environment and operating workers. In addition, most of the existing landfill leachate foam elimination devices use multiple spray heads for spraying or adding defoaming agents to eliminate foam. However, when using the spraying method, the nozzles are often blocked due to impurities in the leachate. The frequent replacement of nozzles not only causes waste of resources but also is very troublesome in actual operation, especially for small-scale transfer pools of leachate. Summary of the Invention

[0007] The technical problem to be solved by the present invention lies in: aiming at the technical problems existing in the prior art, the present invention provides a comprehensive treatment device for easily foaming and malodorous liquids, which has a simple structure, is easy to operate, and can reduce potential, eliminate foam and deodorize.

[0008] To solve the above technical problems, the technical solution proposed by the present invention is as follows:

[0009] A comprehensive treatment device for easily foaming and malodorous liquids, comprising an energy dissipation pool, a foam elimination unit, and a deodorization unit; one end of the energy dissipation pool is provided with a leachate inlet, the other end of the energy dissipation pool is provided with a leachate outlet, the top of the energy dissipation pool is connected to the foam elimination unit through a foam overflow pipe, the bottom of the foam elimination unit is provided with a return pipe, the return pipe is connected to the leachate outlet, the top of the foam elimination unit is connected to the deodorization unit through a gas delivery pipe, and a fan is provided on the gas delivery pipe.

[0010] As a further improvement of the above technical solution:

[0011] The energy dissipation pool includes an energy dissipation chamber, a separation chamber, a buffer dam, columns, and a silt ditch; the buffer dam is located between the energy dissipation chamber and the separation chamber, the columns are located on the buffer dam, and the silt ditch is located at the bottom of the energy dissipation chamber and the separation chamber.

[0012] The buffer dam includes a dam body and a buffer plate. The dam body is provided with a slope on one side of the energy dissipation chamber, and the buffer plate is laid on the slope.

[0013] The slope of the slope θ is between 45° and 65°.

[0014] The foam elimination unit includes a foam elimination tank, a separation leak plate, a stirrer (52), a defoaming agent dosing pump, and a defoaming agent preparation tank; the separation leak plate is located at the lower part of the foam elimination tank; the stirrer (52) is located in the middle of the foam elimination tank, and the top of the foam elimination tank is connected to the defoaming agent preparation tank through the defoaming agent dosing pump.

[0015] The separation leakage tray includes a fixed tray and water leakage holes. The fixed tray is welded to the inner wall of the defoaming tank, and the water leakage holes are located on the fixed tray.

[0016] The defoamer dosing pump is a pulsating pneumatic diaphragm pump.

[0017] The deodorization unit includes an alkali tank, an acid tank and connecting pipes; the top of the alkali tank is connected to the bottom of the acid tank through a connecting pipe.

[0018] The alkali tank includes alkali liquid, an alkali liquid discharge valve and an alkali tank circulation pump; the upper and lower parts of the alkali tank are communicated through a circulation pipe, and the alkali tank circulation pump is located on the circulation pipe, and the circulation pipe is connected to the alkali liquid discharge valve.

[0019] The acid tank includes acid liquid, an acid liquid discharge valve and an acid tank circulation pump; the upper and lower parts of the acid tank are communicated through a circulation pipe, and the acid tank circulation pump is located on the circulation pipe, and the circulation pipe is connected to the acid liquid discharge valve.

[0020] Compared with the prior art, the advantages of the present invention are as follows:

[0021] The comprehensive treatment device for easily foaming and malodorous liquids of the present invention slows down the impact of potential energy caused by high and low positions on the collection pool of easily foaming and malodorous liquids by adding an energy dissipation pool, and at the same time intercepts suspended solids in the easily foaming and malodorous liquids to reduce the dredging cycle of the collection pool of easily foaming and malodorous liquids; reduces the surface tension of the foam part and destroys the elasticity of the foam film surface by mechanical stirring and adding defoamer to break the bubbles; adsorbs and removes malodorous gases generated during the transportation of easily foaming and malodorous liquids through acidic and alkaline substances, so as to achieve the purposes of reducing potential energy, defoaming and deodorization. The present invention has the advantages of low construction cost, convenient operation and easy implementation, and is particularly suitable for small leachate collection wells in landfills and underground sewage collection pools in sewage treatment plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a process flow chart of the current leachate treatment.

[0023] Figure 2 It is a schematic structural diagram of the treatment device of the present invention in the embodiment.

[0024] Figure 3 It is a schematic structural diagram of the energy dissipation pool of the present invention in the embodiment.

[0025] Figure 4 It is a top view structural diagram of the buffer dam and the column of the present invention in the embodiment.

[0026] Figure 5 It is a schematic structural diagram of the buffer dam of the present invention in the embodiment.

[0027] Figure 6This is the structural schematic diagram of the silt ditch of the present invention in the embodiment.

[0028] Figure 7 This is the structural schematic diagram of the defoaming unit of the present invention in the embodiment.

[0029] Figure 8 This is the structural schematic diagram of the separation sieve tray of the present invention in the embodiment.

[0030] Figure 9 This is the structural schematic diagram of the deodorizing unit of the present invention in the embodiment.

[0031] Legend: 1, leachate inlet; 2, leachate outlet; 3, energy dissipation tank; 31, energy dissipation chamber; 32, separation chamber; 33, buffer dam; 331, dam body; 332, buffer plate; 34, column; 35, silt ditch; 351, high point of silt ditch; 352, silt discharge valve; 4, foam overflow pipe; 5, defoaming unit; 51, separation sieve tray; 511, fixed tray; 512, water leakage hole; 52, agitator; 53, dosing pump; 54, configuration tank; 6, reflux pipe; 7, gas delivery pipe; 8, fan; 9, deodorizing unit; 91, alkali tank; 911, alkali solution; 912, alkali solution discharge valve; 913, alkali tank circulation pump; 92, acid tank; 921, acid solution; 922, acid solution discharge valve; 923, acid tank circulation pump; 93, connecting pipe; 10, gas outlet. Detailed implementation manners

[0032] The present invention will be further described below in conjunction with the specification drawings and specific embodiments.

[0033] As Figure 2 shown, the comprehensive treatment device for easily foaming and malodorous liquid in the embodiment of the present invention includes an energy dissipation tank 3, a defoaming unit 5 and a deodorizing unit 9; one end of the energy dissipation tank 3 is provided with a leachate inlet 1, the other end of the energy dissipation tank 3 is provided with a leachate outlet 2, the top of the energy dissipation tank 3 is connected to the defoaming unit 5 through a foam overflow pipe 4, the bottom of the defoaming unit 5 is provided with a reflux pipe 6, the reflux pipe 6 is connected to the leachate outlet 2, the top of the defoaming unit 5 is connected to the deodorizing unit 9 through a gas delivery pipe 7, and a fan 8 is provided on the gas delivery pipe 7.

[0034] The leachate of the incineration project is transported from the leachate inlet 1 to the energy dissipation tank 3 through a special pipeline. The leachate realizes the separation of silt, wastewater and foaming in the energy dissipation tank 3. The wastewater flows into the original liquid tank of the landfill leachate project from the leachate outlet 2. The bubbles flow into the defoaming unit 5 from the foam overflow pipe 4. After the foam is defoamed in the defoaming unit 5, the wastewater flows back to the leachate outlet 2 through the reflux pipe 6. The waste gas flows into the deodorizing unit 9 through the gas delivery pipe 7 for deodorization treatment. The deodorized gas is discharged from the gas outlet 10 on the deodorizing unit 9. The gas volume and flow direction of the waste gas are controlled by the fan 8 and the power is provided.

[0035] In a specific embodiment, if Figure 3 As shown, the energy dissipation pool 3 includes an energy dissipation chamber 31, a separation chamber 32, a buffer dam 33, columns 34 and a silt ditch 35; the buffer dam 33 is located between the energy dissipation chamber 31 and the separation chamber 32, the columns 34 are located on the buffer dam 33, and the silt ditch 35 is located at the bottom of the energy dissipation chamber 31 and the separation chamber 32.

[0036] like Figures 4-6 As shown, the leachate inlet 1 is located at the lower part of the energy dissipation chamber 31, 0.1 to 0.5 cm above the pool bottom; the leachate outlet 2 is located at the lower part of the separation chamber 32, 0.1 to 0.5 cm above the pool bottom. The buffer dam 33 consists of a dam body 331 and a buffer plate 332. The dam body 331 is a reinforced concrete structure, and the buffer plate 332 is a stainless steel plate. The buffer plate 332 is fixed to the surface of the dam body 331 by expansion screws, and the slope θ is between 45° and 65°. The column 34 is a reinforced concrete structure and is evenly fixed on the top surface of the buffer dam 33. The silt ditch 35 is 0.1 to 0.5 cm lower than the bottom of the energy dissipation chamber 31 or the separation chamber 32. The separation chamber 32 and the silt ditch 35 are both designed with slope reduction. The slope angle of the separation chamber 32 points to the silt ditch 35, and the designed slope is 2 / 1000 to 3 / 1000. The high point of the silt ditch 35 is the high end, and the end of the silt discharge valve 352 is the low end.

[0037] The leachate from the incineration project flows into the energy dissipation chamber 31 from the leachate inlet 1, and flows into the separation chamber 32 after being buffered by the buffer dam 33 and the column 34 to remove the potential energy. The large suspended particles settle at the bottom of the separation chamber 32 and flow to the sludge ditch 35 before being discharged. The wastewater is discharged from the leachate outlet 2. The leachate collides violently with the machine to generate bubbles, which are discharged from the foam overflow pipe 4.

[0038] The present invention eliminates the influence of potential energy caused by liquid level difference on the rear end raw liquid pool through the buffer dam 33; the suspended matter in the leachate is intercepted in the middle link of the leachate, and the desilting cycle of the raw liquid pool is extended.

[0039] In a specific embodiment, if Figure 7 As shown, the defoaming unit 5 includes a defoaming tank, a separation drain pan 51, a stirrer 52, a defoaming agent dosing pump 53 and a defoaming agent configuration tank 54. The separation drain pan 51 is located at the bottom of the defoaming tank; the stirrer 52 is located in the middle of the defoaming tank, and the top of the defoaming tank is connected to the defoaming agent configuration tank 54 through the defoaming agent dosing pump 53.

[0040] like Figure 8As shown in the figure, the separation drain pan 51 is located at the lower part of the defoaming tank and consists of a fixed disk 511 and a water leakage hole 512. The fixed disk 511 is connected to the inner wall of the defoaming tank by welding. The water leakage hole 512 is a circular hole opened on the fixed disk 511, and the aperture of the water leakage hole 512 is 50 - 80 um. The impeller of the agitator 52 has no less than 2 pieces, the diameter of the impeller is 1 / 3 - 1 / 2 of the diameter of the defoaming tank, and the impeller stirring speed is 5 - 25 r / min. The defoamer dosing pump 53 is a pulsating pneumatic diaphragm pump. The defoamer configuration tank 54 is made of acid and alkali resistant PE material. The defoamer uses a non-silicon type defoamer. The defoamer is diluted with clear water and then dosed, and the dilution ratio is 2:1 - 5:1. The dosing flow rate is adjusted according to the water volume at the inlet of the energy dissipation pool 3 and the degree of foaming.

[0041] The bubbles flowing into the defoaming unit 5 from the foam overflow pipe 4 are simultaneously subjected to mechanical stirring by the agitator 52 and physical defoaming treatment with the defoamer, and then the foam breaks to generate wastewater. The wastewater flows back to the leachate outlet 2 through the return pipe 6, and the waste gas flows into the deodorization unit 9 through the gas delivery pipe 7 for deodorization.

[0042] In a specific embodiment, the fan 8 uses a Roots blower or a centrifugal blower. The air volume of the fan 8 is determined according to the capacity of the energy dissipation pool 3 and the air change rate. The air change rate is taken as 3 - 6 times, and the air pressure of the fan 8 is determined according to the loss of the frictional resistance of the pipeline along the way.

[0043] In a specific embodiment, as Figure 9 shown, the deodorization unit 9 includes an alkali tank 91, an acid tank 92 and a connecting pipe 93. The top of the alkali tank 91 is connected to the bottom of the connecting pipe 93 through the connecting pipe 93. The alkali tank 91 includes an alkali solution 911, an alkali solution discharge valve 912 and an alkali tank circulation pump 913. The upper and lower parts of the alkali tank 91 are connected through a circulation pipe. The alkali tank circulation pump 913 is located on the circulation pipe, and the circulation pipe is connected to the alkali solution discharge valve 912. The function of the alkali solution discharge valve 912 is to ensure the uniform mixing of the alkali solution 911. When the pH value in the alkali solution 911 is lower than 6.8, the alkali solution 911 is discharged through the alkali solution discharge valve 912 and the alkali solution 911 is replenished. The alkali solution 911 can be prepared with one or several of caustic soda flakes, liquid caustic soda, potassium hydroxide, sodium carbonate or sodium bicarbonate, and the concentration of the alkali solution 911 is 5 wt.% - 38 wt.%.

[0044] Similarly, the acid tank 92 includes acid solution 921, an acid solution discharge valve 923, and an acid tank circulation pump 922. The upper and lower parts of the acid tank 92 are also connected by a circulation pipe. The acid tank circulation pump 922 is located on the circulation pipe, and the circulation pipe is connected to the acid solution discharge valve 923. The function of the acid solution discharge valve 923 is to ensure the uniform mixing of the acid solution 921. When the pH value in the acid solution 921 is higher than 7.0, the acid solution 921 is discharged through the acid solution discharge valve 923 and the acid solution 921 is replenished. The acid solution 921 can be configured with one or several of hydrochloric acid, sulfuric acid, acetic acid, or phosphoric acid, and the concentration of the acid solution 921 is 10 wt.% to 30 wt.%.

[0045] The waste gas flowing into the deodorization unit 9 through the gas delivery pipe 7 enters the bottom of the alkali tank 91. The hydrogen sulfide gas in the odor and the steam carried out by the gas react or are absorbed with the liquid alkali, and the ammonia in the odor dissolves in the alkali solution 911 until the ammonia reaches saturation and then overflows from the upper part of the alkali tank 91, and enters the bottom of the acid tank 92 through the connecting pipe 93. The ammonia gas escaping from the alkali tank 91 and the alkali solution 911 carried out by the gas are absorbed and removed by the acid solution 921 in the acid tank 92. After being treated by the alkali solution 911 and the acid solution 921 in sequence, the odor is basically odorless and is discharged from the upper part of the acid tank 92.

[0046] The comprehensive treatment device for easily foaming and malodorous liquids of the present invention slows down the impact of the potential energy caused by the height difference on the easily foaming and malodorous liquid collection tank by adding an energy dissipation pool 3, and at the same time intercepts the suspended solids in the easily foaming and malodorous liquids to reduce the silt cleaning period of the easily foaming and malodorous liquid collection tank; reduces the surface tension of the foam part and destroys the elasticity of the foam film surface by mechanical stirring and adding defoaming agents to break the bubbles; adsorbs and removes the malodorous gas generated during the transportation of the easily foaming and malodorous liquids by acidic and alkaline substances, so as to achieve the purpose of reducing potential energy, defoaming and deodorization. The present invention involves a small amount of civil engineering and does not involve the installation of large equipment, has the advantages of low construction cost, convenient operation and easy implementation, and is particularly suitable for small leachate collection wells in landfills and underground sewage collection tanks in sewage treatment plants.

[0047] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. An integrated treatment device for easily foaming and malodorous liquids, characterized in that, It includes an energy dissipation pool (3), a defoaming unit (5) and a deodorizing unit (9); one end of the energy dissipation pool (3) is provided with a leachate inlet (1), the other end of the energy dissipation pool (3) is provided with a leachate outlet (2), the top of the energy dissipation pool (3) is connected to the defoaming unit (5) through a foam overflow pipe (4), the bottom of the defoaming unit (5) is provided with a reflux pipe (6), the reflux pipe (6) is connected to the leachate outlet (2), the top of the defoaming unit (5) is connected to the deodorizing unit (9) through a gas delivery pipe (7), and a fan (8) is provided on the gas delivery pipe (7); The energy dissipation pool (3) includes an energy dissipation chamber (31), a separation chamber (32), a buffer dam (33), columns (34) and a silt ditch (35); the buffer dam (33) is located between the energy dissipation chamber (31) and the separation chamber (32), the columns (34) are located on the buffer dam (33), and the silt ditch (35) is located at the bottoms of the energy dissipation chamber (31) and the separation chamber (32); The buffer dam (33) includes a dam body (331) and a buffer plate (332), the dam body (331) is provided with a slope on one side of the energy dissipation chamber (31), and the buffer plate (332) is laid on the slope.

2. The integrated treatment device for easily foaming and malodorous liquids according to claim 1, characterized in that, The slope of the slope θ is between 45° and 65°.

3. The integrated treatment device for easily foaming and malodorous liquids according to any one of claims 1-2, characterized in that, The defoaming unit (5) includes a defoaming tank, a separation drain pan (51), a stirrer (52), a defoaming agent dosing pump (53) and a defoaming agent preparation tank (54); the separation drain pan (51) is located at the lower part of the defoaming tank; the stirrer (52) is located in the middle of the defoaming tank, and the top of the defoaming tank is connected to the defoaming agent preparation tank (54) through the defoaming agent dosing pump (53).

4. The integrated treatment device for easily foaming and malodorous liquids according to claim 3, characterized in that, The separation drain pan (51) includes a fixed plate (511) and water leakage holes (512), the fixed plate (511) is welded to the inner wall of the defoaming tank, and the water leakage holes (512) are located on the fixed plate (511).

5. The integrated treatment device for easily foaming and malodorous liquids according to claim 3, characterized in that, The defoaming agent dosing pump (53) is a pulsed pneumatic diaphragm pump.

6. The integrated treatment device for easily foaming and malodorous liquids according to any one of claims 1-2, characterized in that, The deodorizing unit (9) includes an alkali tank (91), an acid tank (92) and a connecting pipe (93); the top of the alkali tank (91) is connected to the bottom of the acid tank (92) through the connecting pipe (93).

7. The integrated treatment device for easily foaming and malodorous liquids according to claim 6, wherein The alkali tank (91) includes alkali liquid (911), an alkali liquid discharge valve (912) and an alkali tank circulation pump (913); the upper and lower parts of the alkali tank (91) are connected through a circulation pipe, wherein the alkali tank circulation pump (913) is located on the circulation pipe, and the circulation pipe is connected to the alkali liquid discharge valve (912).

8. The integrated treatment device for easily foaming and malodorous liquids according to claim 6, wherein, The acid tank (92) includes acid liquid (921), an acid liquid discharge valve (923) and an acid tank circulation pump (922); the upper and lower parts of the acid tank (92) are connected through a circulation pipe, wherein the acid tank circulation pump (922) is located on the circulation pipe, and the circulation pipe is connected to the acid liquid discharge valve (923).

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