Production device of polyaluminum chloride

Abstract

The utility model relates to the technical field of polyaluminum chloride production, in particular to a polyaluminum chloride production device which comprises a preparation tank, a reaction tank, a filter press, a product tank, a quantitative loading device and an absorption device, a first conveying pipeline is communicated between the preparation tank and the reaction tank, and a second conveying pipeline is communicated between the reaction tank and the filter press. A third conveying pipeline is communicated between the filter press and the product tank, a product loading pipeline is communicated between the product tank and the quantitative loading device, the quantitative loading device is communicated with a loading crane pipe, a first absorption pipeline is communicated between the configuration tank and the absorption device, and a second absorption pipeline is communicated between the reaction tank and the first absorption pipeline; and the absorption device is communicated with a water replenishing pipeline and an emptying pipeline. The device is reasonable and compact in structure and convenient to use, the production rate of the polyaluminum chloride is improved, the cost investment and the labor intensity of workers are reduced, and in addition, the problem of environmental pollution is also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of polyaluminium chloride production, and is a production device for polyaluminium chloride. Background Art

[0002] Polyaluminium chloride is a highly effective water purifier that can be used in water purification, sterilization, deodorization, decolorization, and other fields. Due to its outstanding characteristics and advantages, polyaluminium chloride has a wide range of applications.

[0003] When used in water purification, polyaluminium chloride (PAC) can reduce its usage by over 30% compared to traditional water purifiers, resulting in cost savings of over 40%. Consequently, PAC has become recognized as an excellent water purifier both domestically and internationally. Furthermore, PAC can also be used for specialized water treatment applications such as purifying drinking water and tap water, such as removing iron, fluoride, radioactive pollutants, and floating oil. In recent years, PAC has developed into a technologically mature, market-leading water purifier, poised to gradually replace traditional water purifiers.

[0004] Currently, polyaluminium chloride (PAC) is produced primarily through the bauxite process, the aluminium hydroxide process, and the aluminium chloride process. The aluminium hydroxide process, with its advantages of high product quality and low impurity content, has attracted increasing attention. However, existing production equipment using aluminium hydroxide and hydrochloric acid as raw materials for PAC still suffers from several shortcomings, such as low reaction efficiency, high energy consumption, and severe environmental pollution. These issues have become difficult technical challenges for PAC manufacturers. Summary of the Invention

[0005] The utility model provides a production device for polyaluminium chloride, which overcomes the deficiencies of the prior art and can effectively solve the problems of low preparation efficiency, high energy consumption and serious environmental pollution in the existing polyaluminium chloride preparation device.

[0006] The technical solution of the utility model is achieved through the following measures: a production device of polyaluminium chloride, comprising a preparation tank, a reaction tank, a filter press, a product tank, a quantitative loading device and an absorption device, wherein a first inlet at the top of the preparation tank is fixedly connected with a water distribution pipeline, a second inlet at the top of the preparation tank is fixedly connected with a hydrochloric acid pipeline, a first conveying pipeline is fixedly connected between the top outlet of the preparation tank and the first inlet at the top of the reaction tank, a steam pipeline is fixedly connected between the second inlet at the top of the reaction tank, a second conveying pipeline is fixedly connected between the bottom outlet of the reaction tank and the inlet of the filter press, a third conveying pipeline is fixedly connected between the outlet of the filter press and the top inlet of the product tank, a product loading pipeline is fixedly connected between the outlet of the product tank and the inlet of the quantitative loading device, the outlet of the quantitative loading device is fixedly connected with a loading crane pipe, a first absorption pipeline is fixedly connected between the top outlet of the preparation tank and the lower inlet of the absorption device, a second absorption pipeline is fixedly connected between the top outlet of the reaction tank and the first absorption pipeline, a water supply pipeline is fixedly connected between the upper inlet of the absorption device, and a venting pipeline is fixedly connected to the top outlet of the absorption device.

[0007] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0008] The above-mentioned absorption device includes a primary absorption tower and a secondary absorption tower. A first absorption pipeline is fixedly connected between the top outlet of the configuration tank and the lower inlet of the primary absorption tower, a second absorption pipeline is fixedly connected between the top outlet of the reaction tank and the first absorption pipeline, a water supply pipeline is fixedly connected to the upper inlet of the primary absorption tower, an alkali solution pipeline is fixedly connected to the top of the secondary absorption tower, a third absorption pipeline is fixedly connected between the top outlet of the primary absorption tower and the lower inlet of the secondary absorption tower, a vent pipeline is fixedly connected to the top outlet of the secondary absorption tower, an induced draft fan is fixedly installed on the vent pipeline, and a first remote pressure gauge and a regulating valve are fixedly installed on the first absorption pipeline and the third absorption pipeline between the second absorption pipeline and the lower inlet of the primary absorption tower along the medium flow direction.

[0009] A first circulation pipeline is fixedly connected between the lower outlet of the first absorption tower and the top inlet of the first absorption tower, and a second circulation pipeline is fixedly connected between the lower outlet of the second absorption tower and the top inlet of the second absorption tower. Circulation pumps are fixedly installed on the first circulation pipeline and the second circulation pipeline.

[0010] The bottom of the filter press is fixedly connected with a slag discharge pipeline.

[0011] A first agitator is fixedly arranged in the preparation tank, a first feeding port is fixedly arranged on the top of the preparation tank, and a first viewing window mirror is arranged on the preparation tank.

[0012] A first flow meter and a control valve are fixedly installed on the water distribution pipeline and the hydrochloric acid pipeline along the medium flow direction.

[0013] A second agitator is fixedly arranged in the reaction tank, a second feeding port is fixedly arranged on the top of the reaction tank, and a remote thermometer, a second remote pressure gauge and a second sight glass are fixedly arranged on the reaction tank respectively.

[0014] The first conveying pipeline, the second conveying pipeline and the product loading pipeline are all fixedly installed with conveying pumps.

[0015] The above-mentioned quantitative loading device includes a shut-off valve, a second flowmeter, and a quantitative delivery pipeline. A quantitative delivery pipeline is fixedly connected between the outlet of the third delivery pipeline and the inlet of the loading crane pipe. A shut-off valve and a second flowmeter are fixedly installed on the quantitative delivery pipeline in sequence along the medium flow direction.

[0016] The above-mentioned device also includes a controller, and the induced draft fan, the first remote pressure gauge, the regulating valve, the circulating pump, the first agitator, the first flow meter, the control valve, the second agitator, the remote thermometer, the second remote pressure gauge, the delivery pump, the shut-off valve, and the second flow meter are all electrically connected to the controller.

[0017] The utility model has a reasonable and compact structure and is easy to use, improves the production rate of polyaluminium chloride, reduces cost input and labour intensity of staff, and further avoids environmental pollution problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attachment Figure 1 This is a schematic diagram of the process flow of this utility model.

[0019] Attachment Figure 1 The codes are as follows: 1 for preparation tank, 2 for reaction tank, 3 for filter press, 4 for product tank, 5 for water distribution pipeline, 6 for hydrochloric acid pipeline, 7 for the first transmission pipeline, 8 for steam pipeline, 9 for the second transmission pipeline, 10 for the third transmission pipeline, 11 for product loading pipeline, 12 for loading crane pipe, 13 for the first absorption pipeline, 14 for the second absorption pipeline, 15 for water supply pipeline, 16 for venting pipeline, 17 for the first absorption tower, 18 for the second absorption tower, 19 for the third absorption pipeline, 20 for the induced draft fan, 21 for the first remote transmission Pressure gauge, 22 is the regulating valve, 23 is the first circulation pipeline, 24 is the second circulation pipeline, 25 is the circulation pump, 26 is the slag discharge pipeline, 27 is the first agitator, 28 is the first feeding port, 29 is the first sight glass, 30 is the first flow meter, 31 is the control valve, 32 is the second agitator, 33 is the second feeding port, 34 is the remote thermometer, 35 is the second remote pressure gauge, 36 is the second sight glass, 37 is the delivery pump, 38 is the shut-off valve, 39 is the second flow meter, 40 is the quantitative delivery pipeline, and 41 is the alkali solution pipeline. DETAILED DESCRIPTION

[0020] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0021] In the present invention, unless otherwise specified, the equipment and devices used are all the equipment and devices known and used in the art.

[0022] In this utility model, for the convenience of description, the relative position relationship of each component is described based on the Figure 1 The layout is described in detail, such as the positional relationships of front, back, top, bottom, left, and right are based on the Figure 1 The layout direction is determined by the

[0023] The present invention will be further described below in conjunction with the embodiments and accompanying drawings:

[0024] Example 1: As shown in the attached Figure 1 As shown, the production device of polyaluminium chloride includes a preparation tank 1, a reaction tank 2, a filter press 3, a product tank 4, a quantitative loading device, and an absorption device. The first inlet at the top of the preparation tank 1 is fixedly connected to a water distribution pipeline 5, the second inlet at the top of the preparation tank 1 is fixedly connected to a hydrochloric acid pipeline 6, a first conveying pipeline 7 is fixedly connected between the top outlet of the preparation tank 1 and the first inlet at the top of the reaction tank 2, a steam pipeline 8 is fixedly connected to the second inlet at the top of the reaction tank 2, a second conveying pipeline 9 is fixedly connected between the two outlets at the bottom of the reaction tank and the inlet of the filter press 3, and the outlet of the filter press 3 is fixedly connected to the second inlet. A third conveying pipeline 10 is fixedly connected between the top inlet of the product tank 4, a product loading pipeline 11 is fixedly connected between the outlet of the product tank 4 and the inlet of the quantitative loading device, a loading crane pipe 12 is fixedly connected to the outlet of the quantitative loading device, a first absorption pipeline 13 is fixedly connected between the top outlet of the configuration tank 1 and the lower inlet of the absorption device, a second absorption pipeline 14 is fixedly connected between the top outlet of the reaction tank 2 and the first absorption pipeline 13, a water supply pipeline 15 is fixedly connected to the upper inlet of the absorption device, and a venting pipeline 16 is fixedly connected to the top outlet of the absorption device.

[0025] The preparation tank 1 conveys the prepared mixture of hydrochloric acid, water and aluminum hydroxide powder to the reaction tank 2. Under the closed, high-temperature and high-pressure conditions of the reaction tank 2, a aging reaction occurs. After sampling and analysis, the reaction is stopped and the pressure in the reaction tank 2 is reduced from 0.25MPa to 0.3MPa to about 0.05MPa. The reacted material in the reaction tank 2 is then conveyed under high pressure to the filter press 3 for solid-liquid separation. A small amount of solid is solid waste residue, which can be used as aggregate in the block factory. The liquid after solid-liquid separation enters the product tank 4 for storage. According to customer order requirements, it is quantitatively loaded by the quantitative loading device and sent to the customer's place of use.

[0026] As needed, all internal components of the reaction tank 2 are made of carbon steel lined with hard rubber or tetrafluoroethylene or polytetrafluoroethylene materials, with a Shore hardness of 65HD to 90HD. Under high temperature working conditions of 85°C to 120°C, they are wear-resistant, erosion-resistant, corrosion-resistant and high-temperature resistant.

[0027] As needed, the hydrochloric acid pipeline 6 uses corrosion-resistant CPVC pipes, the first conveying pipeline 7 and the second conveying pipeline 9 both use steel-lined PTFE pipes, and the third conveying pipeline 10, the product loading pipeline 11 and the loading crane pipe 12 all use 316L stainless steel pipes.

[0028] As needed, one or more preparation tanks 1 can be configured according to actual needs.

[0029] As needed, both the preparation tank 1 and the reaction tank 2 are provided with a stirrer, which is a frame-type stirrer.

[0030] The above-mentioned polyaluminium chloride production device can be further optimized and / or improved according to actual needs:

[0031] Example 2: The difference between it and Example 1 is that: Figure 1 As shown, the absorption device includes a primary absorption tower 17 and a secondary absorption tower 18. A first absorption pipeline 13 is fixedly connected between the top outlet of the configuration tank 1 and the lower inlet of the primary absorption tower 17. A second absorption pipeline 14 is fixedly connected between the top outlet of the reaction tank 2 and the first absorption pipeline 13. A water supply pipeline 15 is fixedly connected to the upper inlet of the primary absorption tower 17. An alkali solution pipeline 41 is fixedly connected to the top of the secondary absorption tower 18. A third absorption pipeline 19 is fixedly connected between the top outlet of the primary absorption tower and the lower inlet of the secondary absorption tower. A venting pipeline 16 is fixedly installed on the venting pipeline 16. A draft fan 20 is fixedly installed on the venting pipeline 16. A first remote pressure gauge 21 and a regulating valve 22 are fixedly installed on the first absorption pipeline 13 and the third absorption pipeline 19 between the second absorption pipeline 14 and the lower inlet of the primary absorption tower 17 along the flow direction of the medium.

[0032] As needed, the primary absorption tower 17 uses water as the medium for circulating absorption of acid mist, and the secondary absorption tower 18 uses alkaline solution with a concentration of 10% to 16% for circulating absorption of acid mist. After the secondary absorption tower 18 has been in operation for 4 to 5 months, the required amount of alkaline solution is supplemented based on the concentration detection value of the circulating alkaline solution in the secondary absorption tower 18 to ensure that the acid mist emission at the outlet of the vent pipeline 16 meets the national emission indicators.

[0033] Example 3: The difference between it and Example 1 to Example 2 is that: Figure 1 As shown, a first circulation pipeline 23 is fixedly connected between the lower outlet of the first absorption tower 17 and the top inlet of the first absorption tower 17, and a second circulation pipeline 24 is fixedly connected between the lower outlet of the secondary absorption tower 18 and the top inlet of the secondary absorption tower 18. Circulation pumps 25 are fixedly installed on the first circulation pipeline 23 and the second circulation pipeline 24.

[0034] As needed, the first circulation pipeline 23 and the second circulation pipeline 24 can respectively promote the absorption rate of acid mist by the primary absorption tower 17 and the secondary absorption tower 18. The first absorption pipeline 13, the second absorption pipeline 14, the third absorption pipeline 19, the first circulation pipeline 23 and the second circulation pipeline 24 are all made of FRP pipes; the fillers in the packing layer of the primary absorption tower 17 and the secondary absorption tower 18 are both PVDF pall rings.

[0035] Example 4: The difference between it and Example 1 to Example 3 is that: Figure 1 As shown, a slag discharge pipeline 26 is fixedly connected to the bottom of the filter press 2 .

[0036] Example 5: The difference between it and Example 1 to Example 4 is that: Figure 1 As shown, a first agitator 27 is fixedly provided in the preparation tank 1 , a first feeding port 28 is fixedly provided on the top of the preparation tank 1 , and a first window mirror 29 is provided on the preparation tank 1 .

[0037] Example 6: The difference between it and Example 1 to Example 5 is that: Figure 1 As shown, a first flow meter 30 and a control valve 31 are fixedly installed on the water distribution pipeline 5 and the hydrochloric acid pipeline 6 along the flow direction of the medium.

[0038] Example 7: The difference between it and Example 1 to Example 6 is that: Figure 1 As shown, a second agitator 32 is fixedly installed in the reaction tank 2, a second feeding port 33 is fixedly installed on the top of the reaction tank 2, and a remote thermometer 34, a second remote pressure gauge 35, and a second window mirror 36 are fixedly installed on the reaction tank 2 respectively.

[0039] As required, the diameter of the first feeding port 28 and the second feeding port 33 is not less than φ450 mm, and the feeding method adopts a bottom-up screw conveyor with an inclination angle of 40° to 55°.

[0040] Example 8: The difference between it and Example 1 to Example 7 is that: Figure 1 As shown, a delivery pump 37 is fixedly installed on the first delivery pipeline 7 , the second delivery pipeline 9 , and the product loading pipeline 11 .

[0041] Example 9: The difference between it and Example 1 to Example 8 is that: Figure 1 As shown, the quantitative loading device includes a shut-off valve 38, a second flow meter 39, and a quantitative delivery pipeline 40. The outlet of the third delivery pipeline 11 and the inlet of the loading crane pipe 12 are fixedly connected with the quantitative delivery pipeline 40. The shut-off valve 38 and the second flow meter 39 are fixedly installed in sequence on the quantitative delivery pipeline 40 along the flow direction of the medium.

[0042] Example 10: The difference between it and Example 1 to Example 9 is that: Figure 1 As shown, the device also includes a controller, and the induced draft fan 20, the first remote pressure gauge 21, the regulating valve 22, the circulating pump 25, the first agitator 27, the first flow meter 30, the control valve 31, the second agitator 32, the remote thermometer 34, the second remote pressure gauge 35, the delivery pump 37, the shut-off valve 38, and the second flow meter 39 are all electrically connected to the controller.

[0043] As required, the pipelines and equipment of the polyaluminium chloride production device may be equipped with conventional valves, thermometers and pressure gauges known in the art according to production needs. The DCS controller model may be the CS3000 controller produced by Yokogawa Corporation of Japan.

[0044] The above technical features respectively constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the requirements of different situations.

[0045] The usage process of the embodiment of the present invention is as follows: first, the configuration tank 1 conveys the configured hydrochloric acid, water and aluminum hydroxide powder mixture to the reaction tank 2 through the first conveying pipeline 7; then, steam is input into the reaction tank 2, and the mixture in the reaction tank 2 undergoes a aging reaction under high temperature and high pressure conditions, and the reaction of the mixture in the reaction tank 2 is stopped after the mixture is sampled and analyzed as qualified; then, the mixture in the reaction tank 2 is conveyed to the filter press 3 through the second conveying pipeline 9 for solid-liquid separation; finally, a small amount of solid waste residue after solid-liquid separation is recovered through the slag discharge pipeline 26 and can be used as aggregate in the block factory; the liquid after solid-liquid separation enters the product tank 4 through the third conveying pipeline 10 for storage, and is quantitatively loaded by the quantitative loading device according to customer order requirements and then sent to the customer's place of use.

[0046] The use process of the above embodiment also includes: first, the acid mist gas overflowing from the preparation tank 1 and the reaction tank 2 enters the primary absorption tower 17 through the first absorption pipeline 13 and the second absorption pipeline 14 respectively for absorption with clean water; then, the acid mist not absorbed in the primary absorption tower 17 enters the secondary absorption tower 18 through the third absorption pipeline 19 for absorption with alkaline solution; finally, the mixed gas in the secondary absorption tower 18 (the acid mist content meets the national emission standards) is discharged into the atmosphere through the vent pipeline 16.

Claims

1. A production device for polyaluminium chloride, characterized in that It includes a preparation tank, a reaction tank, a filter press, a product tank, a quantitative loading device, and an absorption device. The first inlet on the top of the preparation tank is fixedly connected to a water distribution pipeline, the second inlet on the top of the preparation tank is fixedly connected to a hydrochloric acid pipeline, the first conveying pipeline is fixedly connected between the top outlet of the preparation tank and the first inlet on the top of the reaction tank, the second inlet on the top of the reaction tank is fixedly connected to a steam pipeline, the second conveying pipeline is fixedly connected between the bottom outlet of the reaction tank and the inlet of the filter press, the third conveying pipeline is fixedly connected between the outlet of the filter press and the top inlet of the product tank, the product loading pipeline is fixedly connected between the outlet of the product tank and the inlet of the quantitative loading device, the outlet of the quantitative loading device is fixedly connected to a loading crane pipe, the first absorption pipeline is fixedly connected between the top outlet of the preparation tank and the lower inlet of the absorption device, the second absorption pipeline is fixedly connected between the top outlet of the reaction tank and the first absorption pipeline, the upper inlet of the absorption device is fixedly connected to a water supply pipeline, and the top outlet of the absorption device is fixedly connected to a venting pipeline.

2. The production device of polyaluminium chloride according to claim 1, wherein The absorption device includes a primary absorption tower and a secondary absorption tower. A first absorption pipeline is fixedly connected between the top outlet of the configuration tank and the lower inlet of the primary absorption tower. A second absorption pipeline is fixedly connected between the top outlet of the reaction tank and the first absorption pipeline. A water supply pipeline is fixedly connected to the upper inlet of the primary absorption tower. An alkali solution pipeline is fixedly connected to the top of the secondary absorption tower. A third absorption pipeline is fixedly connected between the top outlet of the primary absorption tower and the lower inlet of the secondary absorption tower. A vent pipeline is fixedly connected to the top outlet of the secondary absorption tower. An induced draft fan is fixedly installed on the vent pipeline. A first remote pressure gauge and a regulating valve are fixedly installed on the first absorption pipeline and the third absorption pipeline between the second absorption pipeline and the lower inlet of the primary absorption tower along the medium flow direction.

3. The production device of polyaluminium chloride according to claim 2, characterized in that A first circulation pipeline is fixedly connected between the lower outlet of the first absorption tower and the top inlet of the first absorption tower, and a second circulation pipeline is fixedly connected between the lower outlet of the second absorption tower and the top inlet of the second absorption tower. Circulation pumps are fixedly installed on the first circulation pipeline and the second circulation pipeline.

4. The production device of polyaluminium chloride according to claim 1, 2 or 3, characterized in that The bottom of the filter press is fixedly connected with a slag discharge pipeline.

5. The production device of polyaluminium chloride according to claim 4, characterized in that A first agitator is fixedly arranged in the preparation tank, a first feeding port is fixedly arranged on the top of the preparation tank, and a first window mirror is arranged on the preparation tank.

6. The production device of polyaluminium chloride according to claim 1 or 2 or 3 or 5, characterized in that A first flow meter and a control valve are fixedly installed on the water distribution pipeline and the hydrochloric acid pipeline along the medium flow direction.

7. The production device of polyaluminium chloride according to claim 6, characterized in that A second agitator is fixedly arranged in the reaction tank, a second feeding port is fixedly arranged on the top of the reaction tank, and a remote thermometer, a second remote pressure gauge and a second sight glass are fixedly arranged on the reaction tank respectively.

8. The production device of polyaluminium chloride according to claim 1 or 2 or 3 or 5 or 7, characterized in that The first conveying pipeline, the second conveying pipeline and the product loading pipeline are all fixedly installed with conveying pumps.

9. The production device of polyaluminium chloride according to claim 8, characterized in that The quantitative loading device includes a shut-off valve, a second flow meter, and a quantitative delivery pipeline. A quantitative delivery pipeline is fixedly connected between the outlet of the third delivery pipeline and the inlet of the loading crane pipe. A shut-off valve and a second flow meter are fixedly installed on the quantitative delivery pipeline in sequence along the medium flow direction.

10. The production device of polyaluminium chloride according to claim 9, characterized in that It also includes a controller, and the induced draft fan, the first remote pressure gauge, the regulating valve, the circulating pump, the first agitator, the first flow meter, the control valve, the second agitator, the remote thermometer, the second remote pressure gauge, the delivery pump, the shut-off valve, and the second flow meter are all electrically connected to the controller.

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