Defluorination device for purifying dilute sulphuric acid in ardealite acid production

Abstract

The utility model provides a defluorination device for purifying dilute sulphuric acid in ardealite acid making, which relates to the technical field of ardealite acid making and comprises a main body mechanism, a liquid inlet mechanism is arranged on the outer surface wall of the main body mechanism, the main body mechanism comprises a bottom plate, three supporting legs are fixedly connected to the top of the bottom plate, and a jacket is fixedly connected among the tops of the three supporting legs. The input end of the jacket fixedly communicates with a water inlet pipe, and the input end of the water inlet pipe fixedly communicates with a circulating pump. According to the utility model, under the mutual cooperation of the main body mechanism and the liquid inlet mechanism, the defluorination reaction is fully carried out, a defluorination agent and dilute sulphuric acid can be uniformly distributed and efficiently mixed in the defluorination tank through double-shaft alternate stirring treatment, the local concentration difference is avoided, and the reaction temperature is accurately controlled, so that the defluorination effect is improved. The defluorinating agent and the dilute sulphuric acid are fully reacted, so that the defluorinating efficiency is remarkably improved, and the fluorine content of the dilute sulphuric acid is finally reduced to an ideal level.

Description

Technical Field

[0001] This utility model relates to the field of phosphogypsum acid production technology, and in particular to a device for purifying and defluorinating dilute sulfuric acid using phosphogypsum. Background Technology

[0002] Phosphogypsum is a solid waste residue produced during the production of phosphoric acid. Its main component is calcium sulfate. The acid production and purification of dilute sulfuric acid from phosphogypsum involves treating phosphogypsum to produce dilute sulfuric acid. In the phosphogypsum acid production process, phosphogypsum undergoes a series of chemical reactions to generate sulfuric acid.

[0003] After phosphogypsum undergoes acid production, dilute sulfuric acid is generated after the chemical reaction is completed. Since phosphogypsum contains impurities such as phosphorus and fluorine, these impurities will enter the dilute sulfuric acid, resulting in impurities in the sulfuric acid. Furthermore, the presence of fluorine will affect the strength and whiteness of gypsum products, negatively impacting subsequent production processes and product quality. A phosphogypsum-based acid production and purification dilute sulfuric acid defluorination device can remove fluorine from dilute sulfuric acid to improve its purity.

[0004] However, existing phosphogypsum-based acid production, purification, and defluorination equipment for dilute sulfuric acid has the following shortcomings:

[0005] In existing technologies, defluorinating agents are usually added to dilute sulfuric acid and stirred to promote the full defluorination reaction. However, existing phosphogypsum acid purification and defluorination devices for dilute sulfuric acid typically use single-shaft stirring, which usually cannot make the defluorinating agent and dilute sulfuric acid mix evenly and efficiently in the reaction vessel. This easily leads to local concentration differences, and the reaction temperature cannot be precisely controlled and maintained stably, resulting in limited defluorination efficiency and difficulty in reducing the fluorine content in dilute sulfuric acid to the ideal level.

[0006] Therefore, we propose a device for producing acid from phosphogypsum, purifying dilute sulfuric acid, and removing fluoride, in order to solve the problems mentioned above. Utility Model Content

[0007] The purpose of this invention is to provide a device for producing acid from phosphogypsum, purifying dilute sulfuric acid, and removing fluoride. By using a stirring motor and gear transmission, six sets of stirring blades are used to stir efficiently in an alternating manner. At the same time, a circulating pump drives the water inside the jacket to circulate, and the heating tube and temperature sensing components regulate the temperature in real time to ensure that the dilute sulfuric acid reaches the optimal reaction conditions, thereby solving the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a phosphogypsum acid production, purification, and defluorination device for dilute sulfuric acid, comprising a main body, wherein a liquid inlet mechanism is provided on the outer wall of the main body.

[0009] The main structure includes a base plate, three support legs fixedly connected to the top of the base plate, a jacket fixedly connected between the tops of the three support legs, a water inlet pipe fixedly connected to the input end of the jacket, a circulation pump fixedly connected to the input end of the water inlet pipe, a water tank fixedly connected to the input end of the circulation pump, a heating tube fixedly installed on the inner wall of the jacket, a temperature sensor fixedly installed on the inner wall of the jacket, a temperature display fixedly connected to the outer wall of the jacket, a defluorination tank fixedly connected to the inner wall of the jacket, two bearings fixedly inserted into the inner wall of the defluorination tank, a stirring shaft fixedly inserted inside each of the two bearings, gears fixedly fitted on the outer walls of each of the two stirring shafts, a set of rotating rings fixedly fitted on the outer walls of each of the two sets of rotating rings, three stirring blades fixedly connected to the outer walls of each of the two stirring shafts, and a stirring motor fixedly connected to the top of one of the two stirring shafts.

[0010] Preferably, the output end of the jacket is fixedly connected to a water outlet pipe, and a water valve is provided on the inner wall of the water outlet pipe; the top of the defluorination tank is fixedly connected to a feed pipe; the bottom of the defluorination tank is fixedly connected to a drain pipe, and a drain valve is provided on the inner wall of the drain pipe.

[0011] Preferably, the output end of the drain pipe is fixedly connected to an infusion pipe, and the output end of the infusion pipe is fixedly connected to a clear liquid pump.

[0012] Preferably, the liquid inlet mechanism includes a liquid storage tank, an inlet pipe is fixedly connected to one side of the outer wall of the liquid storage tank, and a coarse filter screen is fixedly connected to the inner surface of the liquid storage tank.

[0013] Preferably, a fine filter screen is fixedly connected to the inner wall of the liquid storage tank, and a connecting pipe is fixedly connected to the other side of the outer wall of the liquid storage tank.

[0014] Preferably, the output end of the connecting pipe is fixedly connected to a ceramic pump, and the output end of the ceramic pump is fixedly connected to a delivery pipe.

[0015] Preferably, the top of the base plate is fixedly connected to the bottom of the storage tank, and the outer wall of the defluorination tank is fixedly connected to the output end of the delivery pipe.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0017] 1. In this utility model, through the cooperation of the main structure and the liquid inlet mechanism, the six sets of stirring blades are driven by the stirring motor and the transmission of the gear set to achieve efficient stirring in an alternating manner. At the same time, the circulating pump drives the water inside the jacket to circulate, and the heating tube and temperature sensing component regulate the temperature in real time to ensure that the dilute sulfuric acid reaches the optimal reaction conditions. By strengthening the stirring and temperature control, the defluorination reaction is fully carried out. The dual-shaft alternating stirring treatment can make the defluorinating agent and dilute sulfuric acid evenly distributed and efficiently mixed in the defluorination tank, avoiding local concentration differences. Furthermore, by precisely controlling the reaction temperature, the defluorinating agent and dilute sulfuric acid can fully react, thereby significantly improving the defluorination efficiency and ultimately reducing the fluorine content of the dilute sulfuric acid to the ideal level.

[0018] 2. In this utility model, through the interaction of the components of the liquid inlet mechanism, the coarse filter and the fine filter can filter the unreacted dilute sulfuric acid, effectively intercepting large impurities such as phosphogypsum particles and metal shavings generated by equipment wear, preventing these impurities from interfering with or clogging the subsequent defluorination operation, thereby ensuring the smooth progress of the subsequent defluorination operation. Attached Figure Description

[0019] Figure 1 This utility model provides a perspective view of the main structure of a phosphogypsum-based acid production, purification, and defluorination device for dilute sulfuric acid.

[0020] Figure 2 This utility model provides a three-dimensional sectional view of the main structure of a phosphogypsum-based acid production, purification, and defluorination device for dilute sulfuric acid.

[0021] Figure 3 This utility model provides a three-dimensional sectional view of the main structure of a phosphogypsum-based acid production, purification, and defluorination device for dilute sulfuric acid.

[0022] Figure 4 This invention provides a three-dimensional sectional view of the liquid inlet mechanism in a phosphogypsum-based acid production, purification, and defluorination device for dilute sulfuric acid.

[0023] Legend: 1. Main structure; 101. Base plate; 102. Support leg; 103. Jacket; 104. Water inlet pipe; 105. Circulation pump; 106. Water tank; 107. Heating tube; 108. Temperature sensor; 109. Temperature display; 110. Defluorination tank; 111. Bearing; 112. Stirring shaft; 113. Gear; 114. Rotating ring; 115. Stirring blade; 116. Stirring motor; 117. Water outlet pipe; 118. Water valve; 119. Feeding pipe; 120. Drain pipe; 121. Drain valve; 122. Infusion pipe; 123. Clear liquid pump; 2. Liquid inlet mechanism; 201. Storage tank; 202. Liquid inlet pipe; 203. Coarse filter screen; 204. Fine filter screen; 205. Connecting pipe; 206. Ceramic pump; 207. Delivery pipe. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0026] Please see Figures 1-4 This utility model provides a device for producing acid from phosphogypsum, purifying dilute sulfuric acid, and removing fluoride, including a main body 1, and a liquid inlet mechanism 2 is provided on the outer wall of the main body 1.

[0027] The main structure 1 includes a base plate 101, three support legs 102 fixedly connected to the top of the base plate 101, a jacket 103 fixedly connected between the tops of the three support legs 102, a water inlet pipe 104 fixedly connected to the input end of the jacket 103, a circulation pump 105 fixedly connected to the input end of the water inlet pipe 104, a water tank 106 fixedly connected to the input end of the circulation pump 105, a heating element 107 fixedly installed on the inner wall of the jacket 103, a temperature sensor 108 fixedly installed on the inner wall of the jacket 103, and a heating element 107 fixedly connected to the outer wall of the jacket 103. Temperature display 109, defluorination tank 110 is fixedly connected to the inner wall of jacket 103, two bearings 111 are fixedly inserted into the inner wall of defluorination tank 110, stirring shafts 112 are fixedly inserted into the inside of each of the two bearings 111, gears 113 are fixedly sleeved on the outer walls of each of the two stirring shafts 112, a set of rotating rings 114 are fixedly sleeved on the outer walls of each of the two sets of rotating rings 114, three stirring blades 115 are fixedly connected to the outer walls of each of the two stirring shafts 112, and a stirring motor 116 is fixedly connected to the top of one of the two stirring shafts 112.

[0028] like Figure 2 and Figure 3 As shown, the output end of the jacket 103 is fixedly connected to a water outlet pipe 117, and a water valve 118 is provided on the inner wall of the water outlet pipe 117. The top of the defluorination tank 110 is fixedly connected to a feed pipe 119, and the bottom of the defluorination tank 110 is fixedly connected to a drain pipe 120. A drain valve 121 is provided on the inner wall of the drain pipe 120. Through a preset component, by opening the water valve 118, the water in the jacket 103 can be drained back to the water tank 106. Under the continuous drive of the circulation pump 105, the water inside the jacket 103 flows, thereby more effectively transferring the temperature to the reaction medium inside the defluorination tank 110.

[0029] like Figure 2 and Figure 3 As shown, the output end of the drain pipe 120 is fixedly connected to the infusion pipe 122, and the output end of the infusion pipe 122 is fixedly connected to the clear liquid pump 123. Through the preset component configuration, after the defluorination treatment is completed, the clear liquid pump 123 is responsible for pumping the treated dilute sulfuric acid to the subsequent filter press for further filtration and purification treatment.

[0030] like Figure 4 As shown, the liquid inlet mechanism 2 includes a liquid storage tank 201. A liquid inlet pipe 202 is fixedly connected to one side of the outer wall of the liquid storage tank 201. A coarse filter screen 203 is fixedly connected to the inner wall of the liquid storage tank 201. By pre-setting the above components, the coarse filter screen 203 can perform preliminary filtration of untreated dilute sulfuric acid and effectively intercept large impurities such as phosphogypsum particles and metal shavings generated by equipment wear.

[0031] like Figure 4 As shown, a fine filter screen 204 is fixedly connected to the inner wall of the storage tank 201, and a connecting pipe 205 is fixedly connected to the other side of the outer wall of the storage tank 201. By pre-setting the above components, the fine filter screen 204 can further finely filter the untreated dilute sulfuric acid, thereby removing finer impurities and improving the purity of the dilute sulfuric acid.

[0032] like Figure 4 As shown, the output end of the connecting pipe 205 is fixedly connected to a ceramic pump 206, and the output end of the ceramic pump 206 is fixedly connected to a delivery pipe 207. By pre-setting the above components, the ceramic pump 206 can extract dilute sulfuric acid from the storage tank 201. Since the ceramic pump 206 is made of corrosion-resistant ceramic material, it can effectively avoid corrosion caused by dilute sulfuric acid.

[0033] like Figure 1 As shown, the top of the base plate 101 is fixedly connected to the bottom of the storage tank 201, and the outer wall of the defluorination tank 110 is fixedly connected to the output end of the delivery pipe 207. By pre-setting the above components, the dilute sulfuric acid is pumped into the defluorination tank 210 through the delivery pipe 207 by the drive of the ceramic pump 206 for defluorination treatment. This method not only ensures the stable delivery of dilute sulfuric acid, but also avoids the problem of fluoride pollution that may occur in the delivery process.

[0034] The operating method and working principle of this device are as follows: First, inject an appropriate amount of clean water into the water tank 106 and start the ceramic pump 206. The ceramic pump 206 extracts the dilute sulfuric acid from the storage tank 201 and transports it to the defluorination tank 110 via the delivery pipe 207. During this process, the dilute sulfuric acid stock solution undergoes double filtration through the coarse filter 203 and the fine filter 204 to ensure that impurities are effectively intercepted. The operator then adds an appropriate amount of defluorinating agent to the defluorination tank 110 through the feeding pipe 119 for defluorination treatment. Next, the circulation pump 105 is started, drawing and pressurizing water from the water tank 106, causing the water to flow into the jacket 103 through the inlet pipe 104. A closed circulating heating space is formed between the jacket 103 and the defluorination tank 110. The defluorination tank 110 is made of corrosion-resistant and thermally conductive carbon steel. At this time, the power supply to the heating pipe 107 is turned on to heat the water in the jacket 103. Simultaneously, the temperature sensor 108 detects... The water temperature is monitored in real time, and its sensing end is connected to the receiving end of the temperature display 109, so that the temperature display 109 can display the water temperature in real time, which makes it convenient for the operator to control the heating time of the heating tube 107. By opening the water valve 118, the water in the jacket 103 can be drained back to the water tank 106. Under the continuous drive of the circulation pump 105, the water in the jacket 103 is circulated, which more effectively transfers the temperature to the reaction medium in the defluorination tank 110. Then, the stirring motor 116 is started. The stirring motor 116 drives one stirring shaft 112 to rotate, and through the meshing transmission of two gears 113, the other stirring shaft 112 rotates in the opposite direction, so that the six sets of stirring blades 115 rotate in an interlaced direction, which better promotes the mixing and reaction of the reaction medium and the defluorination agent. Moreover, all six sets of stirring blades 115 are installed at an angle, which makes the liquid flow smoother and improves the stirring efficiency.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A device for producing acid from phosphogypsum, purifying dilute sulfuric acid, and removing fluoride, characterized in that: Includes a main body (1), and the outer wall of the main body (1) is provided with a liquid inlet mechanism (2). The main body (1) includes a base plate (101), three support legs (102) are fixedly connected to the top of the base plate (101), a jacket (103) is fixedly connected between the tops of the three support legs (102), an inlet pipe (104) is fixedly connected to the input end of the jacket (103), a circulation pump (105) is fixedly connected to the input end of the inlet pipe (104), a water tank (106) is fixedly connected to the input end of the circulation pump (105), a heating tube (107) is fixedly installed on the inner wall of the jacket (103), a temperature sensor (108) is fixedly installed on the inner wall of the jacket (103), and the outer wall of the jacket (103) is fixedly... A temperature display (109) is connected to the jacket (103). A defluorination tank (110) is fixedly connected to the inner wall of the jacket (103). Two bearings (111) are fixedly inserted into the inner wall of the defluorination tank (110). A stirring shaft (112) is fixedly inserted into the interior of each of the two bearings (111). Gears (113) are fixedly fitted onto the outer walls of each of the two stirring shafts (112). A set of rotating rings (114) is fixedly fitted onto the outer walls of each of the two sets of rotating rings (114). Three sets of stirring blades (115) are fixedly connected to the outer walls of each of the two sets of stirring shafts (112). A stirring motor (116) is fixedly connected to the top of one of the two stirring shafts (112).

2. The apparatus for producing acid from phosphogypsum, purifying dilute sulfuric acid, and removing fluoride according to claim 1, is characterized in that: The output end of the jacket (103) is fixedly connected to a water outlet pipe (117), and a water valve (118) is provided on the inner wall of the water outlet pipe (117). The top of the defluorination tank (110) is fixedly connected to a feed pipe (119), and the bottom of the defluorination tank (110) is fixedly connected to a drain pipe (120), and a drain valve (121) is provided on the inner wall of the drain pipe (120).

3. The apparatus for producing acid from phosphogypsum, purifying dilute sulfuric acid, and removing fluoride according to claim 2, is characterized in that: The output end of the drain pipe (120) is fixedly connected to the infusion pipe (122), and the output end of the infusion pipe (122) is fixedly connected to the clear liquid pump (123).

4. The apparatus for producing acid from phosphogypsum, purifying dilute sulfuric acid, and removing fluoride according to claim 3, is characterized in that: The liquid inlet mechanism (2) includes a liquid storage tank (201), and a liquid inlet pipe (202) is fixedly connected to one side of the outer wall of the liquid storage tank (201). A coarse filter screen (203) is fixedly connected to the inner wall of the liquid storage tank (201).

5. The apparatus for producing acid from phosphogypsum, purifying dilute sulfuric acid, and removing fluoride according to claim 4, is characterized in that: A fine filter screen (204) is fixedly connected to the inner wall of the liquid storage tank (201), and a connecting pipe (205) is fixedly connected to the other side of the outer wall of the liquid storage tank (201).

6. The apparatus for producing acid from phosphogypsum, purifying dilute sulfuric acid, and removing fluoride according to claim 5, is characterized in that: The output end of the connecting pipe (205) is fixedly connected to a ceramic pump (206), and the output end of the ceramic pump (206) is fixedly connected to a delivery pipe (207).

7. The apparatus for producing acid from phosphogypsum, purifying dilute sulfuric acid, and removing fluoride according to claim 6, is characterized in that: The top of the base plate (101) is fixedly connected to the bottom of the storage tank (201), and the outer wall of the defluorination tank (110) is fixedly connected to the output end of the delivery pipe (207).

Images