Deoiling and deironing device for condensed water treatment

Abstract

The utility model discloses a deoiling and deironing device for condensed water treatment, a treatment tank is divided into an air floatation deoiling area, a filtering deironing area and a water storage area, an air source and a condensed water source to be treated enter the air floatation deoiling area through an ejector, and an oil storage barrel is arranged in the center of the air floatation deoiling area; a filter element is arranged between the porous fixing plate and the fixing plate, the upper part of the filter element is sealed, and a water outlet at the lower part of the filter element is communicated with the water storage area; a first liquidometer and a second liquidometer are arranged in the treatment tank; an exhaust pipe, an electric exhaust valve and a second pressure gauge are arranged at the top of the treatment tank; the first liquid level meter, the second liquid level meter, the water outlet adjusting valve, the second pressure gauge, the electric exhaust valve and the water outlet adjusting valve are all connected with a control system. The oil and iron removal device for condensed water treatment is simple in structure and good in oil and iron removal effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and in particular relates to a condensate water treatment oil and iron removal device. Background Art

[0002] The recycling of condensate is an important water-saving measure in my country's industry. In the condensate polishing system of power plants, the wet cooling unit adopts the operation mode of pre-filtration + high-speed mixed bed, and the air cooling unit adopts the pre-cation bed + high-speed mixed bed mode. Both the pre-cation bed and the high-speed mixed bed adopt in vitro regeneration, and the treated condensate meets the power plant reuse water standard. Unlike pure thermal power generation, the condensate of coal gas power generation in steel plants often contains oil and has a high iron content. Especially in the early stage of system operation, the pre-filter element is frequently blocked and replaced, and the pollutants are mostly oil and iron. The oil leaked from the filter will also contaminate the mixed bed resin, resulting in a short system operation cycle, frequent filter element replacement, resin poisoning and other problems, resulting in high operating costs. Summary of the invention

[0003] Aiming at the problems of oil and iron contamination of mixed bed resin in condensate water of the steel industry in the prior art, which leads to short system operation cycle, frequent filter element replacement, resin poisoning, high operation cost, etc., the utility model provides a condensate water treatment oil and iron removal device.

[0004] The object of the present invention is achieved in the following manner:

[0005] A condensate treatment degreasing and iron removal device comprises a treatment tank, wherein a porous fixed plate and a fixed plate are arranged in the treatment tank, and the treatment tank is divided into an air flotation degreasing area, a filtration deiron removal area and a water storage area, and a liquid inlet pipe and an air-water inlet connected to the air flotation degreasing area are arranged on the treatment tank, and an ejector is arranged at the air-water inlet, and the ejector is connected to an air source and a condensate source to be treated, and an oil storage cylinder is arranged in the center of the air flotation degreasing area, and the bottom of the oil storage cylinder is fixedly and sealedly connected to the porous fixed plate, and the oil storage cylinder is connected to an oil discharge pipe; the porous fixed plate is distributed on the filter plate, and the filter plate is connected to the filter plate, and the filter plate is connected to the filter plate. A filter element is arranged between the water permeable holes in the iron removal area and the porous fixed plate and the fixed plate. The upper part of the filter element is sealed, and the lower water outlet is connected to the water storage area. The bottom of the water storage area is connected to the water outlet pipe and the water outlet regulating valve. A first liquid level gauge is arranged above the porous fixed plate in the processing tank, and a second liquid level gauge is arranged at the same height as the oil storage cylinder. An exhaust pipe and a second pressure gauge are also arranged on the top of the processing tank, and an electric exhaust valve is arranged on the exhaust pipe. The first liquid level gauge, the second liquid level gauge, the water outlet regulating valve, the second pressure gauge, and the electric exhaust valve are all connected to the control system.

[0006] The ejector is connected to the gas source through a gas pipeline, on which an air intake regulating valve, a first check valve and a first pressure gauge are arranged; the ejector is connected to the source of condensate water to be treated through a liquid pipeline, on which an inlet valve, a flow meter and an inlet pump are arranged; the air intake regulating valve, the first check valve, the first pressure gauge, the inlet valve, the flow meter and the inlet pump are all connected to the control system.

[0007] The oil discharge pipe extends out of the processing tank and is connected to the oil storage tank, and a second check valve is arranged on the connecting pipe.

[0008] The upper surface of the fixing plate is threadedly connected with a tie rod bolt, the other end of the tie rod bolt passes through the porous fixing plate and extends out of the oil storage cylinder, the tie rod bolt is fixedly connected with the porous fixing plate, and the connection between the tie rod bolt, the porous fixing plate and the fixing plate is well sealed.

[0009] Compared with the prior art, the utility model mixes the condensate containing oily iron impurities to be treated with gas, and sprays it tangentially into the treatment tank through an ejector, forming a vortex in the annular space between the inner wall of the treatment tank and the oil storage cylinder, releasing a large number of microbubbles that adhere to the oil droplets, gather and rise on the outer wall of the oil storage cylinder, and finally overflow into the oil storage cylinder. The deoiled wastewater enters the filtration and iron removal area through the water-permeable holes on the porous fixed plate, and is filtered and iron removed by the filter element. The water generated by the filtration of the filter element is discharged through the outlet pipe at the bottom of the water storage area for further treatment. The condensate treatment deoiling and iron removal device disclosed by the utility model has a simple structure and good deoiling and iron removal effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] 1 treatment tank, 1-1 liquid inlet valve, 1-2 flow meter, 1-3 liquid inlet pump, 1-4 first pressure gauge, 1-5 first check valve, 1-6 air inlet regulating valve, 1-7 gas pipeline; 2 flotation oil removal area, 2-1 liquid inlet pipe, 2-2 oil storage cylinder, 2-3 oil discharge pipe, 2-4 second pressure gauge; 3 filtration and iron removal area, 3-1 porous fixed plate, 3-2 fixed plate, 3-3 filter element, 3-5 tie rod bolt; 4 water storage area, 4-1 water outlet pipe, 4-2 water outlet regulating valve, 5 ejector, 6 oil storage tank, 6-1 second check valve, 7 first liquid level gauge, 8 exhaust pipe, 8-1 electric exhaust valve, 9 second liquid level gauge. DETAILED DESCRIPTION

[0012] like Figure 1As shown, a condensate treatment oil removal and iron removal device comprises a treatment tank 1, in which a porous fixed plate 3-1 and a fixed plate 3-2 are arranged to divide the treatment tank 1 into a flotation oil removal area 2, a filtration iron removal area 3 and a water storage area 4, a liquid inlet pipe 2-1 and a gas-water inlet connected to the flotation oil removal area 2 are arranged on the treatment tank 1, an ejector 5 is arranged at the gas-water inlet, the ejector 5 is connected to a gas source and a condensate source to be treated, an oil storage cylinder 2-2 is arranged in the center of the flotation oil removal area 2, the bottom of the oil storage cylinder is fixedly connected to the porous fixed plate 3-1 and is well sealed, and the oil storage cylinder is connected to an oil discharge pipe 2-3; water permeable holes (not shown in the figure) connected to the filtration iron removal area are distributed on the porous fixed plate, a filter element is arranged between the porous fixed plate and the fixed plate, the upper part of the filter element 3-3 is sealed, and the lower water outlet is connected to the water storage area 4; the bottom of the water storage area 4 is connected to a water outlet pipe 4-1, and a water outlet regulating valve 4-2 is arranged on the water outlet pipe.

[0013] A first liquid level gauge 7 is arranged above the porous fixed plate 3-1 in the treatment tank 1, and a second liquid level gauge 9 is arranged at the same height as the oil storage cylinder. The first liquid level gauge 7 and the second liquid level gauge 9 are used to measure the liquid level of the wastewater. When the liquid level is too low, the water inflow or the gas-water inflow is increased through the control system. When the liquid level is too high, the water outflow is increased to ensure that the oil in the wastewater can overflow into the oil storage cylinder.

[0014] An exhaust pipe 8 and a second pressure gauge 2-4 are also provided on the top of the treatment tank 1, and an electric exhaust valve 8-1 is provided on the exhaust pipe 8. During the operation of the system, the pressure of the condensate to be treated by the liquid inlet pump 1-3 is 6Mpa, the pressure of the gas source is 6MPa, and the pressure of the tank body is maintained at about 3MPa. The second pressure gauge 2-4 detects the pressure inside the tank 1. According to the measured pressure value, when the pressure exceeds 3.2MPa, the control system adjusts the electric exhaust valve 8-1 to open and release the gas. When the pressure is lower than 2.8MPa, the air intake regulating valve 1-6 is increased to adjust the air intake of the gas source, thereby maintaining the tank pressure at about 3MPa.

[0015] The first liquid level gauge, the second liquid level gauge, the water outlet regulating valve, the second pressure gauge, the electric exhaust valve, and the water outlet regulating valve are all connected to a control system (not shown in the figure) to achieve automatic control.

[0016] Furthermore, the ejector 5 is connected to the gas source through a gas pipeline 1-7, on which an air intake regulating valve 1-6, a first check valve 1-5 and a first pressure gauge 1-4 are provided. The gas source can be air, nitrogen, etc. The air intake regulating valve 1-6 is used to adjust the gas flow, the first check valve 1-5 prevents gas backflow, and the first pressure gauge 1-4 is used to measure the gas pressure in the gas pipeline 1-7, so that the operator can adjust the gas source according to the gas pressure. The ejector 5 is connected to the condensate source to be treated through a liquid pipeline, on which a liquid inlet valve 1-1, a flow meter 1-2 and a liquid inlet pump 1-3 are provided. The liquid inlet valve 1-1 is opened and closed to control the on-off of the liquid pipeline and the size of the liquid inlet flow, and the flow meter 1-2 is used to measure the inlet flow of the condensate. The ejector 5 is used to suck the gas into the wastewater, continuously mix and compress it, and spray it out through its nozzle, and enter the treatment tank 1 tangentially.

[0017] The processing tank 1 is made of stainless steel, and its surroundings and bottom are well sealed to prevent liquid from flowing out; the oil storage cylinder is also round, made of stainless steel, and its bottom is connected to the porous fixing plate 3-1 and is well sealed.

[0018] The wastewater that enters the treatment tank tangentially through the ejector 5 forms a vortex in the annular space between the inner wall of the treatment tank and the oil storage cylinder, releasing a large number of microbubbles that adhere to the oil droplets, gathering and rising on the outer wall of the oil storage cylinder, and finally overflowing into the oil storage cylinder. The oil in the oil storage cylinder is discharged from the oil storage cylinder and the treatment tank through the oil drain pipe.

[0019] In a further preferred embodiment, the oil discharge pipe 2-3 extends out of the treatment tank 1 and connects to the oil storage tank 6, and a second check valve 6-1 is provided on the connecting pipe. The oil discharged through the oil discharge pipe enters the oil storage tank 6 for collection, and the second check valve 6-1 can prevent the oil from flowing back.

[0020] The wastewater after oil removal enters the filtering and iron removal area 3 through the water-permeable holes on the porous fixed plate 3-1, and is filtered and iron-removed by the filter element 3-3. The water generated by the filtration of the filter element 3-3 is discharged through the outlet pipe 4-1 at the bottom of the water storage area 4 for further treatment or other uses. For example, the filtered water coming out of the outlet pipe 4-1 can first enter the temporary storage tank, and then enter the liquid inlet pipe 2-1 to adjust the liquid level in the treatment tank.

[0021] In a further preferred embodiment, the fixing plate 3-2 is threadedly connected with a tie rod bolt 3-5, and the other end of the tie rod bolt 3-5 passes through the porous fixing plate 3-1 and extends out of the oil storage cylinder 2-2. The tie rod bolt 3-5 is fixedly connected to the porous fixing plate 3-1, and the connection between the tie rod bolt 3-5 and the porous fixing plate 3-1 and the fixing plate 3-2 is well sealed. The tie rod bolt 3-5 is rotated to disengage from the screw hole on the fixing plate 3-2, thereby removing the oil storage cylinder 2-2 and the porous fixing plate 3-1 fixedly connected to the rotating tie rod bolt 3-5, and then the filter element is replaced.

[0022] Working process:

[0023] In the initial stage, the water outlet regulating valve 4-2 and the electric exhaust valve 8-1 on the water outlet pipe are closed, and clean water is introduced into the treatment tank through the liquid inlet pipe 2-1. The water enters the filtration and iron removal area 3 from the flotation oil removal area 2 through the water-permeable holes on the porous fixed plate 3-1, and then enters the water storage area 4 through the filter element. The liquid level in the treatment tank gradually rises to the height of the first liquid level gauge, and the valve on the liquid inlet pipe 2-1 is closed. Then the liquid inlet pump 1-3, the liquid inlet valve 1-1 and the air inlet regulating valve 1-6 on the gas pipeline 1-7 are opened, and the mixed and compressed gas-water mixture is tangentially sprayed into the treatment tank through the ejector 5, and a vortex is formed in the annular space between the inner wall of the treatment tank and the oil storage cylinder. After the pressure is suddenly released, a large number of microbubbles are released and adhered to the oil droplets. As the gas-water mixture entering the treatment tank increases, the liquid level rises, and the oil gathers and rises on the outer wall of the oil storage cylinder, and finally overflows into the oil storage cylinder. The enriched oil phase components are finally discharged into the oil storage tank 6 through the oil discharge pipe by gravity. When the oil overflows, the liquid level reaches the height of the second liquid level gauge 9. At this time, open the outlet regulating valve 4-2 on the outlet pipe 4-1 to drain water and maintain the balance of inlet and outlet liquids. According to the reading of the second pressure gauge 2-4, adjust the exhaust pipe 8 and the air intake regulating valve 1-6 at any time to maintain the pressure balance in the treatment tank 1. The oil overflows into the oil storage cylinder, and the wastewater without oil enters the filtration and iron removal area 3 through the water permeable holes on the porous fixed plate, and then passes through the filter element 3-3 to filter and remove iron. The water filtered by the filter element is discharged through the outlet pipe 4-1 at the bottom of the water storage area 4.

[0024] There is a hose connection in the middle of the oil drain pipe to facilitate the opening and closing of the tank. The left side of the top of the tank body of the treatment tank 1 is connected to the tank body hinge for easy opening and closing. When closed, the tank body is well sealed. When the filter element has been used for a long time and its performance has deteriorated significantly and needs to be replaced, first close the liquid inlet valve 1-1, then open the water outlet regulating valve 4-2 on the outlet pipe, and after all the liquid in the tank body has been drained, open the hinge, open the top of the treatment tank 1, and then rotate the tie rod bolt 3-5 to disengage it from the screw hole on the fixing plate 3-2, thereby removing the oil storage cylinder 2-2 and the porous fixing plate 3-1 fixedly connected to the rotating tie rod bolt 3-5, and then replace the filter element.

[0025] The utility model mixes the condensate containing oily iron impurities to be treated with gas, and sprays it into the treatment tank tangentially through an ejector, forming a vortex in the annular space between the inner wall of the treatment tank and the oil storage cylinder, and a large number of released microbubbles adhere to the oil droplets, gather and rise on the outer wall of the oil storage cylinder, and finally overflow into the oil storage cylinder. The wastewater after oil removal enters the filtering and iron removal area through the water-permeable holes on the porous fixed plate, and is filtered and iron removed by the filter element. The water filtered by the filter element is discharged through the outlet pipe at the bottom of the water storage area. The condensate treatment oil removal and iron removal device disclosed by the utility model has a simple structure, good oil removal and iron removal effect, and the filter element is easy to replace.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that, for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A condensate treatment and degreasing and deironing device, comprising a treatment tank (1), characterized in that: A porous fixed plate (3-1) and a fixed plate (3-2) are arranged in the treatment tank (1), and the treatment tank is divided into an air flotation oil removal area (2), a filtration iron removal area (3) and a water storage area (4). The treatment tank (1) is provided with a liquid inlet pipe (2-1) and an air-water inlet connected to the air flotation oil removal area (2). An ejector (5) is arranged at the air-water inlet. The ejector (5) is connected to an air source and a condensate source to be treated. An oil storage cylinder (2-2) is arranged at the center of the air flotation oil removal area (2). The bottom of the oil storage cylinder (2-2) is fixedly connected to the porous fixed plate (3-1) and is well sealed. The oil storage cylinder (2-2) is connected to an oil discharge pipe (2-3). The porous fixed plate (3-1) is provided with water permeable holes connected to the filtration iron removal area (3). A filter element (3-3) is arranged between the plate (3-1) and the fixed plate (3-2); the upper part of the filter element (3-3) is sealed, and the lower water outlet is connected to the water storage area (4); the bottom of the water storage area (4) is connected to the water outlet pipe (4-1) and the water outlet regulating valve (4-2); a first liquid level gauge (7) is arranged above the porous fixed plate in the treatment tank, and a second liquid level gauge (9) is arranged at the same height as the oil storage cylinder; an exhaust pipe (8) and a second pressure gauge (2-4) are also arranged on the top of the treatment tank (1); and an electric exhaust valve (8-1) is arranged on the exhaust pipe (8); the first liquid level gauge (7), the second liquid level gauge (9), the water outlet regulating valve (4-2), the second pressure gauge (2-4), and the electric exhaust valve (8-1) are all connected to a control system.

2. The condensate treatment oil and iron removal device according to claim 1, characterized in that: The ejector (5) is connected to a gas source via a gas pipeline (1-7), and an air intake regulating valve (1-6), a first check valve (1-5) and a first pressure gauge (1-4) are arranged on the gas pipeline (1-7); the ejector (5) is connected to a source of condensate water to be treated via a liquid pipeline, and a liquid intake valve (1-1), a flow meter (1-2) and a liquid intake pump (1-3) are arranged on the liquid pipeline; the air intake regulating valve (1-6), the first check valve (1-5), the first pressure gauge (1-4), the liquid intake valve (1-1), the flow meter (1-2) and the liquid intake pump (1-3) are all connected to a control system.

3. The condensate treatment oil and iron removal device according to claim 1, characterized in that: The oil discharge pipe (2-3) extends out of the processing tank and is connected to the oil storage tank (6), and a second check valve (6-1) is provided on the connecting pipe.

4. The condensate treatment oil and iron removal device according to claim 1, characterized in that: The upper surface of the fixing plate (3-2) is threadedly connected to a tie rod bolt (3-5), the other end of the tie rod bolt (3-5) passes through the porous fixing plate (3-1) and extends out of the oil storage cylinder (2-2), the tie rod bolt (3-5) is fixedly connected to the porous fixing plate (3-1), and the connection between the tie rod bolt (3-5) and the porous fixing plate (3-1) and the fixing plate (3-2) is well sealed.

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