On-line soaking and pickling device for filter cloth of filter press and filter pressing equipment

Abstract

The utility model provides an online soaking and pickling device for filter cloth of a filter press and filter pressing equipment. The online soaking and pickling device for the filter cloth of the filter press comprises an acid adjusting mechanism, the filter press, a conveying pump and a filter, the acid adjusting mechanism comprises an acid adjusting kettle and a stirring assembly; an acid adjusting tank is formed in the acid adjusting kettle, a cleaning outflow end, a cleaning backflow end, a concentrated sulfuric acid feeding end, a pure water feeding end and a steam feeding end are arranged on the outer side of the acid adjusting kettle, and the concentrated sulfuric acid feeding end, the cleaning outflow end, the cleaning backflow end, the pure water feeding end and the steam feeding end are all communicated with the acid adjusting tank; an original filtrate outlet of the filter press is communicated with the cleaning outflow end, and a feeding hole of the filter press is communicated with the cleaning backflow end; on the premise that the filtering efficiency of the filter press is ensured, the filter cloth does not need to be detached in the whole cleaning process, the effect of online soaking and cleaning of the filter cloth is achieved, the blocked filter cloth is recycled, the service life of the filter cloth is greatly prolonged, and the use convenience of filter pressing equipment is improved.

Description

Technical Field

[0001] This disclosure relates to the technical field of battery material production equipment, and in particular to an online soaking and acid washing device for filter cloth in a filter press and a filter press equipment. Background Technology

[0002] In the production process of ferric phosphate precursor products, solid-liquid separation and water washing require the use of large-area filter presses. Due to the continuous nature of production, the filter cloth of the filter press is used frequently. After a certain number of uses, precipitates such as ferric hydroxide and ferric phosphate solids adhere to the fibers of the filter cloth, causing the filter cloth pores to shrink, which in turn makes the filter cloth hard and yellow. This reduces the filter cloth's permeability, significantly lowering the filtration efficiency of the filter press. Consequently, the filter press needs to be replaced with new filter cloth to continue operating, making the filter press equipment less convenient to use. Utility Model Content

[0003] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a convenient online soaking and acid washing device and filter press equipment for filter cloth while ensuring the filtration efficiency of the filter press.

[0004] The purpose of this disclosure is achieved through the following technical solution:

[0005] An online soaking and acid washing device for filter cloth in a filter press includes:

[0006] An acid-adjusting mechanism includes an acid-adjusting kettle and a stirring assembly. An acid-adjusting tank is formed inside the acid-adjusting kettle. The outer side of the acid-adjusting kettle is respectively provided with a cleaning outlet, a cleaning return outlet, a concentrated sulfuric acid dosing end, a pure water inlet, and a steam inlet. The concentrated sulfuric acid dosing end, the cleaning outlet, the cleaning return outlet, the pure water inlet, and the steam inlet are all connected to the acid-adjusting tank. The stirring assembly is mounted on the acid-adjusting kettle and is used to stir the cleaning solution in the acid-adjusting tank.

[0007] A filter press, wherein the raw filtrate outlet of the filter press is connected to the cleaning outflow end, and the feed inlet of the filter press is connected to the cleaning return end;

[0008] A delivery pump is installed on the pipeline connecting the raw filtrate outlet of the filter press and the cleaning outlet.

[0009] A filter is provided on the pipe connecting the original filtrate outlet of the filter press and the cleaning outlet, and the filter is located on the side of the delivery pump adjacent to the acid adjusting kettle.

[0010] In one embodiment, the filter cloth online soaking and acid washing device for the filter press further includes a first pneumatic ball valve and a first pressure probe; the first pneumatic ball valve and the first pressure probe are both located on the pipe connecting the original filtrate outlet of the filter press and the cleaning outlet, the first pressure probe is located adjacent to the filter press, and the first pneumatic ball valve is located between the first pressure probe and the delivery pump.

[0011] In one embodiment, the filter cloth online soaking and acid washing device for the filter press further includes a second pneumatic ball valve and a second pressure probe; the second pneumatic ball valve and the second pressure probe are both located on the pipe connecting the feed inlet of the filter press and the cleaning return end, and the second pneumatic ball valve is located on the side of the second pressure probe away from the filter press.

[0012] In one embodiment, the filter cloth online soaking and acid washing device for the filter press further includes a first pneumatic ball valve, a first pressure probe, a second pneumatic ball valve, and a second pressure probe;

[0013] The first pneumatic ball valve and the first pressure probe are both located on the pipe connecting the original filtrate outlet of the filter press and the cleaning outlet. The first pressure probe is located near the filter press, and the first pneumatic ball valve is located between the first pressure probe and the delivery pump.

[0014] The second pneumatic ball valve and the second pressure probe are both located on the pipe connecting the feed inlet of the filter press and the cleaning return end. The second pneumatic ball valve is located on the side of the second pressure probe away from the filter press.

[0015] The control terminal of the delivery pump is electrically connected to the control terminal of the first pneumatic ball valve, the control terminal of the first pressure probe, the control terminal of the second pneumatic ball valve, and the control terminal of the second pressure probe, respectively.

[0016] In one embodiment, the filter cloth online soaking and acid washing device for the filter press further includes a negative pressure gauge before the pump. The negative pressure gauge before the pump is installed on the pipe connecting the original filtrate outlet of the filter press and the cleaning outlet. The negative pressure gauge before the pump is located on the side of the transfer pump away from the filter press, and the negative pressure gauge before the pump is electrically connected to the control terminal of the transfer pump.

[0017] In one embodiment, the filter cloth online soaking and acid washing device for the filter press further includes a concentrated sulfuric acid supply component, a pure water supply component, and a steam supply component;

[0018] The discharge end of the concentrated sulfuric acid supply component is connected to the concentrated sulfuric acid dosing end, the discharge end of the pure water supply component is connected to the pure water inlet end, and the discharge end of the steam supply component is connected to the steam inlet end.

[0019] In one embodiment, the control terminal of the delivery pump is electrically connected to the control terminals of the stirring assembly, the concentrated sulfuric acid supply assembly, the pure water supply assembly, and the steam supply assembly, respectively.

[0020] In one embodiment, the filter cloth online soaking and acid washing device for the filter press further includes a pH probe, which is located on the acid adjustment tank and electrically connected to the control terminal of the concentrated sulfuric acid supply component. The pH probe is used to monitor the pH value of the cleaning solution in the acid adjustment tank.

[0021] In one embodiment, the filter cloth online soaking and acid washing device for the filter press further includes a liquid level radar, which is installed on the acid conditioning tank. The liquid level radar is electrically connected to the control terminal of the concentrated sulfuric acid supply component and the control terminal of the pure water supply component, respectively. The liquid level radar is used to monitor the liquid level of the cleaning liquid in the acid conditioning tank.

[0022] In one embodiment, the filter cloth online soaking and acid washing device for the filter press further includes a thermometer, which is installed on the acid conditioning tank and electrically connected to the control terminal of the steam supply component. The thermometer is used to monitor the temperature of the cleaning solution in the acid conditioning tank.

[0023] A filter press device includes the online soaking and acid washing device for filter cloth of the filter press as described in any of the above embodiments.

[0024] Compared with the prior art, this disclosure has at least the following advantages:

[0025] 1. The above-mentioned filter cloth online soaking and acid washing device for filter presses adds concentrated sulfuric acid through the concentrated sulfuric acid dosing end and adds pure water in a predetermined proportion through the pure water inlet end to make the pH value of the cleaning solution in the acid adjustment tank reach the preset pH value. Steam is added through the steam inlet end to adjust the temperature of the cleaning solution to reach the preset temperature value. The cleaning solution in the acid adjustment tank is stirred by the stirring component to achieve reliable preparation of the cleaning solution.

[0026] 2. After the filter press has been used a predetermined number of times, the cleaning solution is prepared by the acid adjustment mechanism. The cleaning solution in the acid adjustment tank is pumped from the cleaning outlet to the original filtrate outlet of the filter press by the delivery pump. The rinsed liquid flows back to the acid adjustment tank through the feed inlet and cleaning return end of the filter press. This reverse rinsing is performed. The first rinse will flush larger particles of impurities or residual materials in the gaps of the filter cloth fibers back into the acid adjustment tank. During the circulation of the cleaning solution, larger particles of impurities or residual materials are intercepted by the filter, which not only prevents the other side of the filter cloth from getting dirty again, but also ensures the service life of the delivery pump. In this way, while ensuring the filtration efficiency of the filter press, the filter cloth does not need to be disassembled during the entire cleaning process, which achieves the effect of online soaking and cleaning of the filter cloth. This allows the clogged filter cloth to be reused, greatly extends the service life of the filter cloth, and improves the ease of use of the filter press equipment.

[0027] 3. After the predetermined number of cycles of cleaning, the acidity and temperature in the acid adjustment tank will decrease. Add concentrated sulfuric acid through the concentrated sulfuric acid dosing end and add steam through the steam inlet end to increase the temperature and pH of the cleaning solution. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of an online soaking and acid washing device for filter cloth in a filter press, according to one embodiment.

[0030] Figure label:

[0031] 10. Filter press filter cloth online soaking and acid washing device; 100. Acid adjustment mechanism; 110. Acid adjustment kettle; 111. Cleaning outlet; 112. Cleaning return; 113. Concentrated sulfuric acid dosing end; 114. Pure water inlet; 115. Steam inlet; 116. Acid adjustment tank; 117. Discharge end; 120. Stirring assembly; 122. Rotary drive assembly; 124. Rotary shaft; 126. Stirring paddle; 200. Filter press; 202. Raw filtrate outlet; 204. Feed inlet; 300. Transfer pump; 400. Filter; 500. First pneumatic ball valve; 600. First pressure probe; 700. Second pneumatic ball valve; 800. Second pressure probe; 900. Pump pre-pump negative pressure gauge; 1100. pH probe; 1200. Liquid level radar. Detailed Implementation

[0032] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0036] like Figure 1 As shown, an embodiment of the filter cloth online soaking and acid washing device 10 for a filter press includes an acid conditioning mechanism 100, a filter press 200, a transfer pump 300, and a filter 400.

[0037] The acid-adjusting mechanism 100 includes an acid-adjusting vessel 110 and a stirring assembly 120. The outer side of the acid-adjusting vessel 110 is provided with a cleaning outlet 111, a cleaning return end 112, a concentrated sulfuric acid dosing end 113, a pure water inlet end 114, and a steam inlet end 115. An acid-adjusting tank 116 is formed inside the acid-adjusting vessel 110. The concentrated sulfuric acid dosing end 113, the cleaning outlet 111, the cleaning return end 112, the pure water inlet end 114, and the steam inlet end 115 are all connected to the acid-adjusting tank 116. The stirring assembly 120 is disposed on the acid-adjusting vessel 110 and is used to stir the cleaning solution in the acid-adjusting tank 116.

[0038] The raw filtrate outlet 202 of the filter press 200 is connected to the cleaning outlet 111, and the feed inlet 204 of the filter press 200 is connected to the cleaning return outlet 112. A transfer pump 300 is installed on the pipe connecting the raw filtrate outlet 202 and the cleaning outlet 111 of the filter press 200. A filter 400 is installed on the pipe connecting the raw filtrate outlet 202 and the cleaning outlet 111 of the filter press 200, and the filter 400 is located on the side of the transfer pump 300 adjacent to the acid-adjusting kettle 110. In this embodiment, the transfer pump 300 is a centrifugal pump, and the filter 400 is a Y-type filter.

[0039] The above-mentioned filter cloth online soaking and acid washing device 10 for the filter press adds concentrated sulfuric acid through the concentrated sulfuric acid dosing end 113 and pure water in a predetermined proportion through the pure water inlet end 114 to make the pH value of the cleaning solution in the acidification tank 116 reach the preset pH value. Steam is introduced through the steam inlet end 115 to adjust the temperature of the cleaning solution to the preset temperature value. The cleaning solution in the acidification tank 116 is stirred by the stirring component 120 to achieve reliable preparation of the cleaning solution. After the filter press 200 is used a predetermined frequency, the cleaning solution is prepared by the acidification mechanism (100), and the cleaning solution in the acidification tank 116 is pumped from the cleaning outlet end 111 into the original filtrate outlet 202 of the filter press 200 by the transfer pump 300. The rinsed liquid flows back to the acidification tank 116 through the feed inlet 204 and the cleaning return end 112 of the filter press 200, and so on. The initial rinsing flushes away larger particles or residues from the gaps in the filter cloth fibers and back into the acidification tank 116. During the cleaning solution circulation, larger particles or residues are intercepted by the filter 400, preventing the other side of the filter cloth from becoming dirty again and ensuring the service life of the transfer pump 300. Thus, while ensuring the filtration efficiency of the filter press 200, the filter cloth does not need to be disassembled during the entire cleaning process, achieving the effect of online soaking and cleaning of the filter cloth. This allows for the regeneration and reuse of clogged filter cloth, greatly extending its service life and improving the ease of use of the filter press equipment. Moreover, after a predetermined number of cyclic cleaning cycles, the acidity and temperature in the acidification tank 116 decrease. Concentrated sulfuric acid is added through the concentrated sulfuric acid dosing end 113, and steam is added through the steam inlet end 115 to raise the temperature and pH value of the cleaning solution.

[0040] like Figure 1As shown, in one embodiment, the stirring assembly 120 includes a rotary drive assembly 122, a rotating shaft 124, and a stirring paddle 126. The rotary drive assembly 122 is mounted on the top of the acid-adjusting vessel 110. One end of the rotating shaft 124 is located outside the acid-adjusting vessel 110 and fixed to the power shaft of the rotary drive assembly 122. The other end of the rotating shaft 124 is located inside the acid-adjusting tank 116 and connected to the stirring paddle 126, which is located inside the acid-adjusting tank 116. For example, the rotary drive assembly 122 is fixed to the top of the acid-adjusting vessel 110 by a fixing bracket (not shown). It should be noted that the rotary drive assembly 122 is prior art and will not be described in detail here.

[0041] like Figure 1 As shown, in one embodiment, the filter cloth online soaking and pickling device 10 for the filter press 200 further includes a first pneumatic ball valve 500 and a first pressure probe 600. Both the first pneumatic ball valve 500 and the first pressure probe 600 are located on the pipe connecting the original filtrate outlet 202 and the cleaning outlet 111 of the filter press 200. The first pressure probe 600 is positioned adjacent to the filter press 200, and the first pneumatic ball valve 500 is located between the first pressure probe 600 and the transfer pump 300. During pickling, the transfer pump 300 operates continuously until the first pressure probe 600 detects that the pipe pressure reaches a first preset pressure value. At this point, the first pneumatic ball valve 500 closes, the transfer pump 300 stops, and the timing of the first predetermined pickling time begins, ensuring pressure stability during the filter cloth regeneration pickling process. In this embodiment, the first preset pressure value is 0.8 MPa, and the first predetermined time is 1 hour.

[0042] like Figure 1As shown, in one embodiment, the filter press filter cloth online soaking and acid washing device 10 further includes a second pneumatic ball valve 700 and a second pressure probe 800. The second pneumatic ball valve 700 and the second pressure probe 800 are both located on the pipe connecting the feed inlet 204 of the filter press 200 and the cleaning return end 112. The second pneumatic ball valve 700 is located on the side of the second pressure probe 800 away from the filter press 200. The first pressure probe 600 and the second pressure probe 800 are both located near the filter press 200 to monitor the pressure at the cleaning inlet and outlet of the filter press 200 in a timely manner, so as to better ensure the pressure stability during the filter cloth regeneration acid soaking process. When performing online acid impregnation on the filter cloth of the filter press 200, the second pneumatic ball valve 700 is first closed, and the delivery pump 300 continues to work until both the first pressure probe 600 and the second pressure probe 800 detect that the pipeline pressure has reached the first preset pressure value. Then, the first pneumatic ball valve 500 is closed, the delivery pump 300 is stopped, and the first predetermined acid impregnation time is started. The impurities in the filter cloth fiber gaps react with the acid to generate gas, causing the internal pressure to rise. Then, the second pneumatic ball valve 700 automatically opens to release the pressure. After the pressure is released, the second pneumatic ball valve 700 automatically closes. Then, the delivery pump 300 is restarted to start a new pressure holding process, which better ensures the pressure stability during the filter cloth regeneration acid impregnation process. In one embodiment, the filter cloth online soaking and acid washing device 10 for the filter press further includes a first pneumatic ball valve 500, a first pressure probe 600, a second pneumatic ball valve 700, and a second pressure probe 800; the first pneumatic ball valve 500 and the first pressure probe 600 are both located on the pipe connecting the original filtrate outlet 202 and the cleaning outlet 111 of the filter press 200, the first pressure probe 600 is located adjacent to the filter press 200, and the first pneumatic ball valve 500 is located between the first pressure probe 600 and the transfer pump 300; the second The pneumatic ball valve 700 and the second pressure probe 800 are both located on the pipeline connecting the feed inlet of the filter press 200 and the cleaning return end 112. The second pneumatic ball valve 700 is located on the side of the second pressure probe 800 away from the filter press 200. The control terminal of the delivery pump 300 is electrically connected to the control terminals of the first pneumatic ball valve 500, the first pressure probe 600, the second pneumatic ball valve 700, and the second pressure probe 800, respectively, to realize the automation of online acid immersion of the filter cloth of the filter press 200.

[0043] In this embodiment, online acid immersion of the filter cloth in the filter press 200 is achieved through automatic control. First, the first pressure probe 600 and / or the second pressure probe 800 monitor whether the pipeline pressure is lower than a first preset pressure value. If so, the second pneumatic ball valve 700 is closed, and the delivery pump 300 is kept running until both the first pressure probe 600 and the second pressure probe 800 detect that the pipeline pressure has reached the first preset pressure value. Then, the first pneumatic ball valve 500 is closed, and the delivery pump 300 is stopped. The acid immersion time is started for a first predetermined time, removing impurities from the fiber gaps of the filter cloth. The reaction with acid produces gas, causing the internal pressure to rise. Then, when the pipeline pressure is detected by the first pressure probe 600 and / or the second pressure probe 800 to be greater than the first preset pressure value, the second pneumatic ball valve 700 and / or the first pneumatic ball valve 500 are opened to release pressure until the pipeline pressure returns to the first preset pressure value. Then, the second pneumatic ball valve 700 and / or the first pneumatic ball valve 500 are closed. Then, the delivery pump 300 is restarted to start a new pressure holding process. This cycle of acid immersion is repeated to better ensure the pressure stability during the acid immersion process of filter cloth regeneration.

[0044] like Figure 1 As shown, in one embodiment, the filter cloth online soaking and acid washing device 10 for the filter press further includes a pre-pump negative pressure gauge 900. The pre-pump negative pressure gauge 900 is located on the pipe connecting the original filtrate outlet 202 and the cleaning outlet 111 of the filter press 200. The pre-pump negative pressure gauge 900 is located on the side of the transfer pump 300 away from the filter press 200. The pre-pump negative pressure gauge 900 is electrically connected to the control terminal of the transfer pump 300. When the pre-pump negative pressure gauge 900 rises to a second preset pressure value, the transfer pump 300 stops to clean the filter 400, preventing the transfer pump 300 from being unloaded or the filter 400 from becoming clogged. In this embodiment, the pre-pump negative pressure gauge 900 is a negative pressure mechanical gauge, and the second preset pressure value is 15 PSI.

[0045] In one embodiment, the filter cloth online soaking and acid washing device 10 for the filter press further includes a concentrated sulfuric acid supply component (not shown), a pure water supply component (not shown), and a steam supply component (not shown); the discharge end of the concentrated sulfuric acid supply component is connected to the concentrated sulfuric acid dosing end 113 to supply concentrated sulfuric acid to the acid conditioning tank 116; the discharge end of the pure water supply component is connected to the pure water inlet end 114 to supply pure water to the acid conditioning tank 116; and the discharge end of the steam supply component is connected to the steam inlet end 115 to supply steam to the acid conditioning tank 116.

[0046] In one embodiment, the control terminal of the delivery pump 300 is electrically connected to the control terminals of the stirring assembly 120, the concentrated sulfuric acid supply assembly, the pure water supply assembly, and the steam supply assembly, respectively. When preparing the cleaning solution, the delivery pump 300 stops. Then, the concentrated sulfuric acid supply assembly supplies concentrated sulfuric acid to the acid conditioning tank 116 through the concentrated sulfuric acid dosing end 113 until the liquid level in the acid conditioning tank 116 reaches the first liquid level value. Then, the pure water supply assembly supplies pure water to the acid conditioning tank 116 through the pure water inlet end 114. At the same time, the stirring assembly 120 stirs the cleaning solution in the acid conditioning tank 116 until the liquid level in the acid conditioning tank 116 reaches the second liquid level value, so that the pH value of the cleaning solution in the acid conditioning tank 116 reaches the preset pH value. Then, the steam supply assembly supplies steam to the acid conditioning tank 116 through the steam inlet end 115 until the temperature in the acid conditioning tank 116 reaches the preset temperature value, thus ensuring the acidity and temperature of the cleaning solution. When the acidity or temperature of the cleaning solution decreases, for example, when the number of cyclic cleanings reaches a predetermined number, the acidity and temperature in the acid-adjusting tank 116 both decrease. The concentrated sulfuric acid supply component replenishes the concentrated sulfuric acid into the acid-adjusting tank 116 through the concentrated sulfuric acid dosing end 113. At the same time, the stirring component 120 stirs the cleaning solution in the acid-adjusting tank 116 until the pH value of the cleaning solution in the acid-adjusting tank 116 reaches the preset pH value. The steam supply component replenishes the steam into the acid-adjusting tank 116 through the steam inlet end 115 until the temperature in the acid-adjusting tank 116 reaches the preset temperature value, so as to ensure the acidity and temperature of the cleaning solution during the cleaning process.

[0047] like Figure 1 As shown, in one embodiment, the filter cloth online soaking and acid washing device 10 for the filter press further includes a pH probe 1100. The pH probe 1100 is mounted on the acid adjusting tank 110 and is electrically connected to the control terminal of the concentrated sulfuric acid supply component. The pH probe 1100 is used to monitor the pH value of the cleaning solution in the acid adjusting tank 116 to accurately monitor the pH value of the cleaning solution in the acid adjusting tank 116 in real time, ensuring that the pH value of the cleaning solution in the acid adjusting tank 116 is within the preset pH value range. In this embodiment, the preset pH value is less than or equal to 1.8. The pH probe 1100 is used to monitor and display the pH value of the cleaning solution in the acid adjusting tank 116 so that the user can observe the pH value of the cleaning solution in the acid adjusting tank 116. When the pH value of the cleaning solution in the acid adjusting tank 116 is detected by the pH probe 1100 to reach the preset pH value, the concentrated sulfuric acid supply component stops supplying concentrated sulfuric acid to the acid adjusting tank 116 through the concentrated sulfuric acid dosing terminal 113 to avoid over-dosing of concentrated sulfuric acid. When the pH probe 1100 detects a decrease in the acidity of the cleaning solution in the acid adjustment tank 116 (i.e., the pH value is greater than 1.8), the concentrated sulfuric acid supply component replenishes the acid adjustment tank 116 with concentrated sulfuric acid through the concentrated sulfuric acid dosing end 113 until the pH value of the cleaning solution in the acid adjustment tank 116 reaches the preset pH value.

[0048] like Figure 1 As shown, in one embodiment, the filter cloth online soaking and acid washing device 10 for the filter press further includes a level radar 1200. The level radar 1200 is installed on the acid conditioning tank 110 and is electrically connected to the control terminals of the concentrated sulfuric acid supply component and the pure water supply component. The level radar 1200 is used to monitor the liquid level of the cleaning solution in the acid conditioning tank 116 to accurately monitor the liquid level in the acid conditioning tank 116 in real time, thus avoiding excessive liquid level in the acid conditioning tank 116. For example, during the supply of concentrated sulfuric acid, when the liquid level of the cleaning solution in the acid conditioning tank 116 reaches the first liquid level value, the concentrated sulfuric acid supply component stops supplying concentrated sulfuric acid to avoid excessive addition of concentrated sulfuric acid. Similarly, during the supply of pure water, when the liquid level of the cleaning solution in the acid conditioning tank 116 reaches the second liquid level value, the pure water supply component stops supplying pure water to avoid excessive addition of pure water. In this embodiment, the first liquid level value is 0.7m, and the second liquid level value is 2.4m. When the pH probe 1100 detects a decrease in the acidity of the cleaning solution in the acid conditioning tank 116 (i.e., a pH value greater than 1.8), and the current liquid level of the cleaning solution is at the second liquid level height, a portion of the cleaning solution in the acid conditioning tank 116 can be discharged through the drain end 117 of the acid conditioning vessel 110 before adding concentrated sulfuric acid. In this embodiment, the drain end 117 is connected to the acid conditioning tank 116.

[0049] like Figure 1 As shown, in one embodiment, the filter cloth online soaking and acid washing device 10 for the filter press also includes a thermometer (not shown). The thermometer is mounted on the acid conditioning tank 110 and is electrically connected to the control terminal of the steam supply component. The thermometer is used to monitor the temperature of the cleaning liquid in the acid conditioning tank 116 in real time. In this embodiment, when the thermometer detects that the temperature of the cleaning liquid in the acid conditioning tank 116 is lower than a preset temperature value, the steam supply component is activated through the control terminal of the steam supply component until the temperature of the cleaning liquid in the acid conditioning tank 116 reaches the preset temperature value. Specifically, a proportional valve is provided on the pipe connecting the outlet end and the steam inlet end 115 of the steam supply component to achieve the effect of temperature control linkage. In one embodiment, the preset temperature value is 75℃~80℃.

[0050] like Figure 1 As shown, this application also provides a filter press device, including the filter cloth online soaking and acid washing device 10 of any of the above embodiments.

[0051] The above-mentioned filter press equipment, using the filter cloth online soaking and acid washing device 10 of any of the above embodiments, not only improves the service life of the filter cloth of the filter press 200, but also realizes the online soaking and acid washing operation of the filter cloth, thus improving the ease of use of the filter press equipment.

[0052] In one embodiment, when the filter cloth of filter press 200 becomes clogged and needs regeneration, the production personnel need to switch filter press 200 out of service via a valve and use a standby filter press 200 to continue production; then, concentrated sulfuric acid is added to the acid treatment tank 116 to a level of 0.7m, and feeding is stopped; then, pure water is turned on, and the stirring device is activated, adding water to the upper limit of 2.4m, and the display value of the pH probe 1100 is observed to ensure that the pH value of the cleaning solution is less than or equal to 1.8; then, the proportional valve of the steam pipeline connecting the steam supply component and the steam inlet is opened to supply steam to the steam supply unit. Steam is added to the acid conditioning tank 116 to maintain the temperature of the cleaning solution at 75-80℃, with temperature control linked to the proportional valve. Acid washing is then started, and the transfer pump 300 pumps the prepared cleaning solution (acid) from the acid conditioning tank 116 through the cleaning outlet 111 into the original filtrate outlet 202. The acid then flows through the original filtrate outlet 202 and the filtrate outlet pipe into the filter press 200 for backwashing. The initial rinse flushes away larger impurities or residual materials from the filter cloth fiber gaps back into the acid system. During acid circulation, larger particles are intercepted by the filter 400. As the number of acid circulation cycles increases, the acidity and temperature of the acid decrease. The system controls the addition of sulfuric acid through the concentrated sulfuric acid dosing end 113 to increase the acidity and the addition of steam through the steam inlet end 115 to increase the steam level. During acid leaching, the system controls the second pneumatic valve to close, while the centrifugal pump continues to operate. When the pipeline pressure reaches 0.8 MPa, the system controls the first pneumatic valve to close, stopping the centrifugal pump and initiating a 1-hour acid leaching timer. The reaction of impurities in the filter cloth fibers with the acid produces gas, causing the internal pressure to gradually rise until it exceeds 0.8 MPa. Afterward, the system controls the first and / or second pneumatic valves to open to release pressure, then restarts the centrifugal pump, initiating a new pressure-holding cycle. This entire system enables online acid washing and reuse of the filter cloth, improving the ease of use of the filter press equipment.

[0053] It should be noted that the control methods involved in the operation of the above-mentioned filter press filter cloth online soaking and pickling device 10 are all existing technologies. This disclosure only protects the various components of the filter press filter cloth online soaking and pickling device 10 and their connection and position relationships.

[0054] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent disclosure. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent disclosure should be determined by the appended claims.

Claims

1. An on-line immersion pickling device for filter cloth of a filter press, characterized by comprising: The application relates to a sulfuric acid concentration adjusting mechanism. The acid concentration adjusting mechanism comprises an acid concentration adjusting kettle (110) and a stirring assembly (120); the acid concentration adjusting kettle (110) is provided with an acid concentration adjusting groove (116) formed inside, and the outer side of the acid concentration adjusting kettle (110) is respectively provided with a cleaning outflow end (111), a cleaning backflow end (112), a concentrated sulfuric acid adding end (113), a pure water access end (114) and a steam access end (115); the concentrated sulfuric acid adding end (113), the cleaning outflow end (111), the cleaning backflow end (112), the pure water access end (114) and the steam access end (115) are all communicated with the acid concentration adjusting groove (116); the stirring assembly (120) is arranged on the acid concentration adjusting kettle (110) and is used for stirring cleaning liquid in the acid concentration adjusting groove (116). A filter (400) is arranged on a pipeline communicated between the original filtrate outlet (202) of the filter press (200) and the cleaning outflow end (111), and the filter (400) is located on the side, close to the acid concentration adjusting kettle (110), of the conveying pump (300). The application further comprises a first pneumatic ball valve (500) and a first pressure probe (600); the first pneumatic ball valve (500) and the first pressure probe (600) are both arranged on the pipeline communicated between the original filtrate outlet (202) of the filter press (200) and the cleaning outflow end (111); the first pressure probe (600) is arranged close to the filter press (200); and the first pneumatic ball valve (500) is located between the first pressure probe (600) and the conveying pump (300). The application further comprises a second pneumatic ball valve (700) and a second pressure probe (800); the second pneumatic ball valve (700) and the second pressure probe (800) are both arranged on the pipeline communicated between the feeding port (204) of the filter press (200) and the cleaning backflow end (112); and the second pneumatic ball valve (700) is located on the side, away from the filter press (200), of the second pressure probe (800).

2. The filter press cloth on-line immersion pickling apparatus according to claim 1, characterized by, The application further comprises a first pneumatic ball valve (500), a first pressure probe (600), a second pneumatic ball valve (700) and a second pressure probe (800); 3. The filter press filter cloth on-line immersion pickling device according to claim 1 or 2, characterized in that, The first pneumatic ball valve (500) and the first pressure probe (600) are both arranged on the pipeline communicated between the original filtrate outlet (202) of the filter press (200) and the cleaning outflow end (111); the first pressure probe (600) is arranged close to the filter press (200); and the first pneumatic ball valve (500) is located between the first pressure probe (600) and the conveying pump (300).

4. The filter press cloth on-line immersion pickling apparatus according to claim 1, characterized by, ​ ​ The second pneumatic ball valve (700) and the second pressure probe (800) are arranged on a pipeline communicated between the feed inlet (204) of the filter press (200) and the cleaning backflow end (112), and the second pneumatic ball valve (700) is located on the side of the second pressure probe (800) away from the filter press (200). The control end of the conveying pump (300) is electrically connected with the control end of the first pneumatic ball valve (500), the control end of the first pressure probe (600), the control end of the second pneumatic ball valve (700) and the control end of the second pressure probe (800) respectively.

5. The filter press cloth on-line immersion pickling apparatus according to claim 1, characterized by, The pump front negative pressure gauge (900) is arranged on a pipeline communicated between the raw filtrate outlet (202) of the filter press (200) and the cleaning outflow end (111), and the pump front negative pressure gauge (900) is located on the side of the conveying pump (300) away from the filter press (200). The pump front negative pressure gauge (900) is electrically connected with the control end of the conveying pump (300).

6. The filter press cloth on-line immersion pickling device (10) according to claim 1, characterized in that, The concentrated sulfuric acid supply assembly, the pure water supply assembly and the steam supply assembly are further included. The discharge end of the concentrated sulfuric acid supply assembly is communicated with the concentrated sulfuric acid adding end (113), the discharge end of the pure water supply assembly is communicated with the pure water access end (114), and the discharge end of the steam supply assembly is communicated with the steam access end (115).

7. The filter press cloth on-line immersion pickling apparatus according to claim 6, characterized by, The control end of the conveying pump (300) is electrically connected with the control end of the stirring assembly (120), the control end of the concentrated sulfuric acid supply assembly, the control end of the pure water supply assembly and the control end of the steam supply assembly.

8. The filter press cloth on-line immersion pickling apparatus according to claim 7, characterized by, The PH probe (1100) is arranged on the acid adjusting kettle (110), and is electrically connected with the control end of the concentrated sulfuric acid supply assembly. The PH probe (1100) is used for monitoring the PH value of the cleaning liquid in the acid adjusting tank (116); and / or The filter press filter cloth online soaking pickling device (10) further includes a liquid level radar (1200) arranged on the acid adjusting kettle (110). The liquid level radar (1200) is electrically connected with the control end of the concentrated sulfuric acid supply assembly and the control end of the pure water supply assembly respectively. The liquid level radar (1200) is used for monitoring the liquid level height of the cleaning liquid in the acid adjusting tank (116).

9. The filter press cloth on-line immersion pickling apparatus according to claim 7, characterized by, The filter press filter cloth online soaking pickling device (10) further includes a thermometer arranged on the acid adjusting kettle (110). The thermometer is electrically connected with the control end of the steam supply assembly. The thermometer is used for monitoring the temperature of the cleaning liquid in the acid adjusting tank (116).

10. A filter press apparatus, characterized in that, The filter press filter cloth online soaking pickling device (10) includes the filter press filter cloth online soaking pickling device (10) according to any one of claims 1 to 9.

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