A device for improving the purity of polyaluminium chloride

Abstract

The invention discloses a device for improving the purity of polyaluminium chloride, comprising a first tower body and a venturi device. The venturi device comprises a contraction tube, a throat and a diffusion tube. A sprayer is arranged in the throat, the sprayer is connected to a liquid storage tank through a first liquid supply tube, the contraction tube is connected to an air outlet of a high-pressure blower, the diffusion tube is connected to a liquid inlet of the first tower body, a spray device is arranged at the top of the first tower body, the spray device is connected to a liquid medicine tank through a second liquid supply tube, the liquid inlet is located below the spray device, a filtering device is arranged below the liquid inlet, a neutralization tank is arranged below the filtering device, a draft fan is connected to the neutralization tank, a polyaluminium chloride liquid is atomized and sprayed into the first tower body, and the liquid is contacted and reacted with an iron salt solution sprayed from the spray device, thereby improving the reaction speed, and water-insoluble substances and impurities generated after the reaction are filtered through the filtering device. The filtering speed is accelerated by the draft fan, thereby greatly improving the purification efficiency and accelerating the work progress.

Description

Technical Field

[0001] The invention relates to the technical field of chemical purification devices, and in particular to a device for improving the purity of polyaluminium chloride. Background Art

[0002] Polyaluminium chloride (PAC) is an inorganic substance, an emerging water purification material and an inorganic polymer coagulant. In the process of preparing polyaluminium chloride, impurities and sulfides will be produced. It is necessary to remove the impurities and sulfides to improve the purity of polyaluminium chloride. The existing purification equipment has low purification efficiency, takes a long time, and reduces work efficiency. Summary of the invention

[0003] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a device for improving the purity of polyaluminium chloride.

[0004] In order to achieve the above technical effects, the present invention adopts the following scheme:

[0005] A device for improving the purity of polyaluminium chloride comprises a first tower body, a liquid inlet is provided on the side wall of the first tower body, the liquid inlet is connected to a high-pressure blower through a venturi device, the venturi device comprises a contraction tube, a throat and a diffusion tube, a sprayer is provided in the throat, the sprayer is connected to a liquid storage tank through a first liquid supply tube, a first water pump is installed on the first liquid supply tube, the contraction tube is connected to the air outlet of the high-pressure blower, the diffusion tube is connected to the liquid inlet of the first tower body, a spray device is provided at the top of the first tower body, the spray device is connected to a liquid tank through a second liquid supply tube, a second water pump is provided on the second liquid supply tube, the liquid inlet is located below the spray device, and the A filtering device is also provided in the first tower body, and the filtering device is located below the liquid inlet. A neutralization tank is provided below the filtering device, and the neutralization tank is connected to an induced draft fan. A drain port is provided at the bottom of the neutralization tank, and a first valve is provided at the drain port. A feeding port is provided on one side of the neutralization tank, and a sealing cover is provided at the feeding port. The neutralization tank is provided with a pH tester. The drain port of the neutralization tank is connected to the second tower body through a delivery pipe, and a third water pump is provided on the delivery pipe. An evaporation tank is provided in the second tower body, and the delivery pipe is connected to the evaporation tank. The evaporation tank is provided with a heating device, and the top of the evaporation tank is connected to a condenser through a steam pipe, and a discharge port is provided at the bottom of the evaporation tank.

[0006] According to a preferred technical solution, an air purification device is connected to the air inlet of the high-pressure blower.

[0007] According to a preferred technical solution, the spray device comprises a spray pipe, a plurality of spray heads are installed on the spray pipe, the spray pipe is connected to the second liquid supply pipe, and a plurality of spray heads are installed on the spray pipe.

[0008] A preferred technical solution, the filtering device includes a filter frame, the filter frame is rectangular, a filter membrane is arranged in the filter frame, a protrusion is arranged around the side wall of the first tower body, the protrusion is rectangular, an insertion groove is arranged along the inner side of the protrusion, the insertion groove is connected with the interior of the first tower body, the insertion groove matches the filter frame, the filter frame is inserted into the insertion groove around, the filter membrane is located inside the first tower body, and one side of the protrusion has an opening for inserting the filter frame, and a sealing door is provided at the opening.

[0009] According to a preferred technical solution, the heating device comprises an electric heating tube wound around the outer wall of the evaporator, and the side wall of the evaporator is made of heat-conducting material.

[0010] According to a preferred technical solution, a heat-insulating layer is provided on the side wall of the second tower body.

[0011] Compared with the prior art, the beneficial effects are:

[0012] The invention has a simple structure and is easy to use. The polyaluminium chloride liquid is sprayed into the first tower body in an atomized form to react with the iron salt solution sprayed from the spraying device, thereby increasing the contact area between the polyaluminium chloride liquid and the iron salt solution and improving the reaction speed. The water-insoluble substances and impurities generated after the reaction are filtered through a filtering device. An induced draft fan is provided in the neutralization tank to accelerate the filtering speed, greatly improve the purification efficiency, and speed up the work progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention.

[0014] Figure numerals: 1. first tower body; 201. contraction tube; 202. throat; 203. diffusion tube; 3. high-pressure fan; 4. air purification device; 5. sprayer; 6. first liquid supply pipe; 7. liquid storage tank; 8. first water pump; 9. spray pipe; 10. spray head; 11. second liquid supply pipe; 12. protrusion; 13. filter frame; 14. sealing door; 15. neutralization tank; 16. induced draft fan; 17. sealing cover; 18. pH tester; 19. first valve; 20. delivery pipe; 21. third water pump; 22. second tower body; 23. evaporation tank; 24. electric heating tube; 25. steam pipe; 26. condenser; 27. discharge port. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] A device for improving the purity of polyaluminium chloride comprises a first tower body 1, wherein a liquid inlet is provided on the side wall of the first tower body 1, wherein the liquid inlet is connected to a high-pressure blower 3 through a venturi device, wherein the venturi device comprises a contraction tube 201, a throat 202 and a diffusion tube 203, wherein a sprayer 5 is provided in the throat 202, wherein the sprayer 5 is connected to a liquid storage tank 7 through a first liquid supply tube 6, wherein a first water pump 8 is installed on the first liquid supply tube 6, wherein the contraction tube 201 is connected to an air outlet of the high-pressure blower 3, wherein the diffusion tube 203 is connected to the liquid inlet of the first tower body 1, wherein a spraying device is provided at the top of the first tower body 1, wherein the spraying device is connected to a liquid medicine tank through a second liquid supply tube 11, wherein a second water pump is provided on the second liquid supply tube 11, wherein the liquid inlet is located below the spraying device, wherein the first tower body 1 also has a A filtering device is provided, and the filtering device is located below the liquid inlet. A neutralization tank 15 is provided below the filtering device, and the neutralization tank 15 is connected to an induced draft fan 16. A drain port is provided at the bottom of the neutralization tank 15, and a first valve 19 is provided at the drain port. A feeding port is provided on one side of the neutralization tank 15, and a sealing cover 17 is provided at the feeding port. The neutralization tank 15 is provided with a pH tester 18. The drain port of the neutralization tank 15 is connected to a second tower body 22 through a delivery pipe 20, and a third water pump 21 is provided on the delivery pipe 20. An evaporation tank 23 is provided in the second tower body 22, and the delivery pipe 20 is connected to the evaporation tank 23. The evaporation tank 23 is provided with a heating device, and the top of the evaporation tank 23 is connected to a condenser 26 through a steam pipe 25, and a discharge port 27 is provided at the bottom of the evaporation tank 23.

[0017] The high-pressure blower 3 pressurizes the inhaled air and conveys it to the venturi device. The air is pressurized again by contracting the contraction tube 201, increasing the flow rate of the gas in the throat 202. The liquid storage tank 7 contains polyaluminium chloride liquid, which is conveyed to the sprayer 5 by the first water pump 8 and sprayed into the throat 202. The liquid is sheared by the high-speed airflow in the rear throat 202, and then passes into the diffusion tube 203. The pressure suddenly decreases and atomizes. The atomized polyaluminium chloride liquid enters the first tower body 1. The liquid medicine tank contains iron salt solution, which reacts with sulfide to generate insoluble iron sulfide and hydrochloric acid. The spray device sprays the iron salt solution and the mist. The polyaluminium chloride is contacted with the precipitated polyaluminium chloride, and the product is filtered through a filtering device to filter out impurities and insoluble iron sulfide in the product. The polyaluminium chloride liquid enters the neutralization tank 15 below the filtering device. The neutralization tank 15 is connected to an induced draft fan 16. The induced draft fan 16 is turned on to form a negative pressure in the neutralization tank 15 to accelerate the filtering of the filtering device. Since there is still acid in the filtered polyaluminium chloride liquid, a feeding port is set on one side of the neutralization tank 15 to feed alkali for neutralization. After the neutralization, the polyaluminium chloride liquid is sent to the evaporation tank 23 through a conveying pipe 20 for heating and evaporation, and is discharged through a discharge port 27 after evaporation and concentration.

[0018] According to a preferred technical solution, the air inlet of the high-pressure blower 3 is connected to an air purification device 4 for filtering out impurities such as dust in the air to avoid introducing impurities into the polyaluminium chloride liquid.

[0019] According to a preferred technical solution, the spray device comprises a spray pipe 9 , on which a plurality of spray heads 10 are installed. The spray pipe 9 is connected to a second liquid supply pipe 11 , on which a plurality of spray heads 10 are installed.

[0020] A preferred technical solution, the filtering device includes a filter frame 13, the filter frame 13 is rectangular, a filter membrane is arranged in the filter frame 13, a protrusion 12 is arranged around the side wall of the first tower body 1, the protrusion 12 is rectangular, an insertion groove is arranged along the inner side of the protrusion 12, the insertion groove is communicated with the interior of the first tower body 1, the insertion groove matches the filter frame 13, the filter frame 13 is inserted into the insertion groove around, the filter membrane is located inside the first tower body 1, and one side of the protrusion 12 has an opening for inserting the filter frame 13, and a sealing door 14 is provided at the opening.

[0021] According to a preferred technical solution, the heating device comprises an electric heating tube 24 wound around the outer wall of the evaporation tank 23, and the side wall of the evaporation tank 23 is made of heat-conducting material.

[0022] According to a preferred technical solution, a heat-insulating layer is provided on the side wall of the second tower body 22 .

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A device for improving the purity of polyaluminium chloride, characterized in that: The invention comprises a first tower body, a side wall of the first tower body is provided with a liquid inlet, the liquid inlet is connected to a high-pressure fan through a venturi device, the venturi device comprises a contraction tube, a throat and a diffusion tube, a sprayer is arranged in the throat, the sprayer is connected to a liquid storage tank through a first liquid supply tube, a first water pump is installed on the first liquid supply tube, the contraction tube is connected to an air outlet of the high-pressure fan, the diffusion tube is connected to the liquid inlet of the first tower body, a spray device is arranged at the top of the first tower body, the spray device is connected to a liquid tank through a second liquid supply tube, a second water pump is arranged on the second liquid supply tube, the liquid inlet is located below the spray device, and a sprayer is arranged in the first tower body. A filtering device is provided, the filtering device is located below the liquid inlet, a neutralization tank is provided below the filtering device, the neutralization tank is connected to an induced draft fan, a drain port is provided at the bottom of the neutralization tank, a first valve is provided at the drain port, a feeding port is provided on one side of the neutralization tank, a sealing cover is provided at the feeding port, a pH tester is provided in the neutralization tank, the drain port of the neutralization tank is connected to the second tower body through a delivery pipe, a third water pump is provided on the delivery pipe, an evaporation tank is provided in the second tower body, the delivery pipe is connected to the evaporation tank, the evaporation tank is provided with a heating device, the top of the evaporation tank is connected to a condenser through a steam pipe, and a discharge port is provided at the bottom of the evaporation tank; The filter device comprises a filter frame, the filter frame is rectangular, a filter membrane is arranged in the filter frame, a protrusion is arranged around the side wall of the first tower body, the protrusion is rectangular, an insertion groove is arranged along the inner side of the protrusion, the insertion groove is communicated with the interior of the first tower body, the insertion groove matches the filter frame, the filter frame is inserted into the insertion groove around the periphery, the filter membrane is located inside the first tower body, one side of the protrusion has an opening for inserting the filter frame, and a sealing door is arranged at the opening; The air inlet of the high-pressure blower is connected with an air purification device.

2. The device for improving the purity of polyaluminium chloride as claimed in claim 1, characterized in that: The spray device comprises a spray pipe, the spray pipe is connected to the second liquid supply pipe, and a plurality of spray heads are installed on the spray pipe.

3. The device for improving the purity of polyaluminium chloride as claimed in claim 1, characterized in that: The heating device comprises an electric heating tube which is wound around the outer wall of the evaporation tank, and the side wall of the evaporation tank is made of heat-conducting material.

4. The device for improving the purity of polyaluminium chloride as claimed in claim 1, characterized in that: A heat-insulating layer is provided on the side wall of the second tower body.

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