CN117919807A - Waste sulfuric acid recovery equipment - Google Patents

Abstract

The application relates to the field of sulfuric acid recovery, in particular to waste sulfuric acid recovery equipment. Comprises a closed box body, a piston plate, a filter plate, a weight box body, a crane, a pipe group and a valve group; the piston plate and the filter plate are arranged in the airtight box, the edge of the filter plate is fixedly connected with the airtight box, and the edge of the piston plate is in sliding connection with the inner wall of the airtight box along the vertical direction and is in sealing fit with the inner wall of the airtight box; an assembly port is arranged in the center of the top surface of the closed box body, the bottom surface of the weight box body is fixedly connected with the upper surface of the piston plate, and the outer side surface of the weight box body is in sliding connection with the inner side edge of the assembly port along the vertical direction and is in sealing fit with the inner side edge of the assembly port; the pipe group comprises a waste sulfuric acid input pipe, a clean sulfuric acid circulating pipe and a clean sulfuric acid output pipe; one end of the waste sulfuric acid input pipe is communicated with the bottom of the middle space, and the other end of the waste sulfuric acid input pipe is connected with a waste sulfuric acid source; one end of the clean sulfuric acid circulating pipe is communicated with the bottom of the lower space, and the other end of the clean sulfuric acid circulating pipe is communicated with the top of the upper space; one end of the clean sulfuric acid output pipe is communicated with the bottom of the middle space, and the other end is connected with a clean sulfuric acid source.

Description

Waste sulfuric acid recovery equipment

Technical Field

The application relates to the field of sulfuric acid recovery, in particular to waste sulfuric acid recovery equipment.

Background

In the process of recycling the waste sulfuric acid, the waste sulfuric acid needs to be filtered, distilled and the like, so that the purity and the concentration of the sulfuric acid are improved, and the filtration and the evaporation of water are accelerated by adopting a vacuum filtration mode in the prior art. However, in the suction filtration process, the negative pressure container is required to be pressurized, and the pressure is gradually increased due to the gradual increase of sulfuric acid in the negative pressure container, so that the vacuum machine needs to continuously work or intermittently and repeatedly work. And the volume of the negative pressure container is not excessively large, otherwise, the time required for vacuumizing is long, the power requirement on the vacuum machine is high, and the energy consumption cost is high. It is therefore desirable to develop a high-efficiency, low-energy-consumption waste sulfuric acid recovery apparatus to reduce the cost and improve the efficiency of the suction filtration process.

Disclosure of Invention

In view of the above, a waste sulfuric acid recovery device is provided, which improves the filtration efficiency of waste sulfuric acid and reduces the energy consumption cost.

The application provides waste sulfuric acid recovery equipment, which comprises a closed box body, a piston plate, a filter plate, a weight box body, a crane, a pipe group and a valve group; the piston plate and the filter plate are horizontally arranged in the closed box body from top to bottom, the edge of the filter plate is fixedly connected with the closed box body, the edge of the piston plate is in sliding connection with the inner wall of the closed box body along the vertical direction and is in sealing fit with the inner wall of the closed box body, and the piston plate and the filter plate divide the inner space of the closed box body into an upper space, a middle space and a lower space from top to bottom; the weight box body is positioned above the piston plate, the top surface of the weight box body is fixedly connected with a hanging ring, and the crane lifts the weight box body through the hanging ring; an assembly port is arranged in the center of the top surface of the closed box body, the bottom surface of the weight box body downwards penetrates through the assembly port and is fixedly connected with the upper surface of the piston plate, the top surface of the weight box body upwards penetrates through the assembly port and extends to the upper side of the closed box body, and the outer side surface of the weight box body is in sliding connection with the inner side edge of the assembly port along the vertical direction and is in sealing fit; the pipe group comprises a waste sulfuric acid input pipe, a clean sulfuric acid circulating pipe and a clean sulfuric acid output pipe; one end of the waste sulfuric acid input pipe is communicated with the bottom of the middle space, and the other end of the waste sulfuric acid input pipe is connected with a waste sulfuric acid source; one end of the clean sulfuric acid circulating pipe is communicated with the bottom of the lower space, and the other end of the clean sulfuric acid circulating pipe is communicated with the top of the upper space; one end of the clean sulfuric acid output pipe is communicated with the bottom of the middle space, and after the piston plate descends to the bottom of the middle space, the piston plate is lower than the clean sulfuric acid output pipe, and the other end of the clean sulfuric acid output pipe is connected with a clean sulfuric acid source; the valve group comprises a waste sulfuric acid input control valve, a clean sulfuric acid circulation control valve and a clean sulfuric acid output control valve; the waste sulfuric acid input control valve is arranged on the waste sulfuric acid input pipe, the clean sulfuric acid circulation control valve is arranged on the clean sulfuric acid circulation pipe, and the clean sulfuric acid output control valve is arranged on the clean sulfuric acid output pipe; the top surface of airtight box is equipped with the pressure release mouth, install the sealing plug in the pressure release mouth.

In some embodiments of the above waste sulfuric acid recovery apparatus, the tube set further comprises a clean water input tube, a clean water circulation tube, a waste water output tube; one end of the purified water input pipe is communicated with the top of the upper space, and the other end of the purified water input pipe is connected with a purified water source; one end of the water purifying circulating pipe is communicated with the lower space, and the other end of the water purifying circulating pipe is communicated with the top of the upper space; one end of the waste water output pipe is communicated with the bottom of the middle space, and the other end of the waste water output pipe is connected with a waste water source; the valve group also comprises a purified water input control valve, a purified water circulation control valve and a wastewater output control valve; the water purification input control valve is arranged on the water purification input pipe, the water purification circulation control valve is arranged on the water purification circulation pipe, and the wastewater output control valve is arranged on the wastewater output pipe.

In some embodiments of the above waste sulfuric acid recovery apparatus, the waste sulfuric acid recovery apparatus further comprises a bidirectional water pump, the tube set further comprises a counterweight water tube, one end of the counterweight water tube is communicated with the bottom in the counterweight box body, the other end of the counterweight water tube is connected with one port of the bidirectional water pump, and the other port of the bidirectional water pump is connected with a counterweight water source.

In some embodiments of the above waste sulfuric acid recovery apparatus, the tube set further comprises a water purification tube, a waste water tube; one end of the water purifying pipe is communicated with the lower space, and the other end of the water purifying pipe is connected with a water purifying source; one end of the waste pipe is communicated with the bottom of the middle space, and the other end of the waste pipe is connected with a waste water source; the valve group also comprises a water purifying control valve and a waste water control valve; the water purification control valve is installed on the water purification pipe, and the wastewater control valve is installed on the wastewater pipe.

In some embodiments of the above waste sulfuric acid recovery apparatus, an inner seal ring is fixedly connected to an inner wall of the assembly port, the inner seal ring is tightly matched with an outer side face of the weight box body, and the assembly port is in sealing fit with the outer side face of the weight box body through the inner seal ring.

In some embodiments of the above waste sulfuric acid recovery apparatus, an outer seal ring is fixedly connected to an outer side surface of the piston plate, the outer seal ring is tightly matched with an inner wall of the closed box, and the piston plate is tightly matched with the inner wall of the closed box through the outer seal ring.

In some embodiments of the above waste sulfuric acid recovery apparatus, a horizontal permeable partition is disposed in the lower space, an edge of the permeable partition is fixedly connected with the closed box, a lower surface of the filter plate contacts with an upper surface of the permeable partition and covers the upper surface of the permeable partition, and the filter plate is fixedly connected with the permeable partition.

In some embodiments of the above waste sulfuric acid recovery apparatus, the lower space is provided with a limiting cylinder, the lower end of the limiting cylinder is fixedly connected with the bottom surface of the lower space, the outer side surface of the limiting cylinder is tightly matched with the inner wall of the closed box, the water permeable partition plate and the filter plate are located inside the limiting cylinder, and the edge of the water permeable partition plate is fixedly connected with the inner wall of the limiting cylinder.

In some embodiments of the above waste sulfuric acid recovery apparatus, the enclosure and the weight box are each vertically cylindrical in shape.

In some embodiments of the above waste sulfuric acid recovery apparatus, the waste sulfuric acid recovery apparatus further comprises a controller, and the valves in the valve block are all solenoid valves and are connected to the controller respectively.

The invention has the beneficial effects that:

In the working process, in the initial state, all valves in the valve group are in a closed state, and the piston plate is positioned at the bottom of the middle space; firstly, opening a waste sulfuric acid control valve and a sealing plug, lifting the weight box upwards by using a crane, gradually increasing the volume of the middle space, generating negative pressure in the middle space, and sucking the waste sulfuric acid in the waste sulfuric acid source into the middle space; closing a waste sulfuric acid control valve and a sealing plug, separating a lifting hook of the crane from a lifting ring, and driving a piston plate to slide downwards by a weight box body under the action of gravity to squeeze air and waste sulfuric acid in a middle space; the clean sulfuric acid circulation control valve is opened, the lower space is communicated with the upper space through the clean sulfuric acid circulation pipe, waste sulfuric acid in the middle space enters the lower space through the filter plate under the action of pressure difference between the middle space and the lower space, and meanwhile, the upper space is in a negative pressure state after the sealing plug is closed, so that the pressure difference between the middle space and the lower space is further increased; in the process, the particulate impurities in the waste sulfuric acid are filtered to form clean sulfuric acid, and the clean sulfuric acid in the lower space enters the upper space through a clean sulfuric acid circulating pipe under the action of pressure; with the extrusion filtration, the water permeability of the filter plate gradually decreases due to the gradual increase of the blocking degree, and the weight on the piston plate is continuously increased with the continuous inflow of clean sulfuric acid, so that the pressure in the middle space gradually increases, and the defect of the decrease of the filtration speed due to the increase of the blocking degree is overcome; when the piston plate descends to the bottom of the middle space, all waste sulfuric acid in the middle space is filtered by the filter plate and then collected into the upper space, the piston plate moves to the lower part of the clean sulfuric acid output pipe, at the moment, the sealing plug and the clean sulfuric acid output control valve are opened, and the clean sulfuric acid in the upper space is discharged to a clean sulfuric acid source through the clean sulfuric acid output pipe; and closing all valves in the valve group, and repeating the steps to realize the filtration of the waste sulfuric acid. In the whole process, the waste sulfuric acid and the clean sulfuric acid are always in a closed environment, no harmful gas escapes, stable and unchanged pressure is generated by means of the weight box body, extra power consumption is not needed to maintain the pressure, energy consumption and cost are obviously reduced, the clean sulfuric acid flows into an upper space to increase weight, the weight of the clean sulfuric acid is fully utilized, the filtration speed attenuation effect caused by gradual increase of the blocking degree of a filter plate is compensated, and the filtration work efficiency of the waste sulfuric acid is improved.

After multiple filtering operations, the blocking degree of the filter plate continuously rises, the attenuation effect of the filtering speed is continuously overlapped, at the moment, the sealing plug is opened, the weight box body is lifted, then the sealing plug is closed, the water purification input control valve and the water purification circulation control valve are opened, the weight box body is released, the piston is pulled downwards, the air pressure of the upper space is reduced, the water purification of a water purification source is sucked into the upper space through the water purification input pipe, the water purification input control valve is closed, the wastewater output control valve is opened, the weight box body is lifted, the piston is pulled upwards to pressurize the upper space, the water purification of the upper space is pressed into the lower space through the water purification circulation pipe, the pressure of the middle space is gradually reduced, the water purification of the lower space enters the middle space through the filter plate under the action of the pressure difference between the middle space and the lower space, in the process, the blocking in the filter plate is reversely flushed by the water purification, the filter plate is cleaned and dredged, after the piston plate is lifted to the top of the upper space, the water purification circulation control valve is closed, the sealing plug and the wastewater output control valve are opened, the weight box is released, and the wastewater in the middle space is discharged to the wastewater source through the wastewater. And the filter plate is cleaned repeatedly in a reciprocating manner. After cleaning, the waste sulfuric acid filtering operation with high benefit, low energy consumption and low cost can be performed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features and aspects of the application and together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic view of a waste sulfuric acid recovery apparatus according to an embodiment of the present application;

FIG. 2 is a schematic view of the structure of the waste sulfuric acid recovery apparatus according to the embodiment of the present application, in which the piston plate is lowered to the bottom of the middle space;

FIG. 3 is a schematic view showing the construction of another apparatus for recovering waste sulfuric acid in the embodiment of the present application.

Description of the reference numerals

100. A closed box body; 102. a piston plate; 104. a filter plate; 106. a weight box; 108. an upper space; 110. a middle space; 112. a lower space; 114. an assembly port; 116. a waste sulfuric acid input pipe; 118. a clean sulfuric acid circulation pipe; 120. a clean sulfuric acid output pipe; 122. waste sulfuric acid is input into a control valve; 124. a clean sulfuric acid circulation control valve; 126. a clean sulfuric acid output control valve; 128. a pressure relief port; 130. a sealing plug; 132. a purified water input pipe; 134. a water purifying circulation pipe; 136. a waste water output pipe; 138. purified water is input into the control valve; 140. a water purification circulation control valve; 142. a waste water output control valve; 144. a two-way water pump; 146. a counterweight water pipe; 148. a water purifying pipe; 150. a waste pipe; 152. a water purification control valve; 154. a waste water control valve; 156. an inner seal ring; 158. an outer seal ring; 160. a water permeable separator; 162. a hanging ring; 164. and a limiting cylinder.

Detailed Description

Various exemplary embodiments, features and aspects of the application will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated. The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. In addition, for the purposes of better illustrating the application, it will be apparent to one skilled in the art that numerous specific details are set forth in the various embodiments that follow. The application may be practiced without some of these specific details. In some embodiments, methods, means and elements well known to those skilled in the art have not been described in detail in order to highlight the gist of the present application.

Various exemplary embodiments, features and aspects of the application will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated. The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. In addition, for the purposes of better illustrating the application, it will be apparent to one skilled in the art that numerous specific details are set forth in the various embodiments that follow. The application may be practiced without some of these specific details. In some embodiments, methods, means and elements well known to those skilled in the art have not been described in detail in order to highlight the gist of the present application.

Referring to fig. 1 and 2, an embodiment of the present application provides a waste sulfuric acid recovery apparatus, which includes a closed casing 100, a piston plate 102, a filter plate 104, a weight casing 106, a crane, a pipe group, and a valve group; the piston plate 102 and the filter plate 104 are horizontally arranged in the airtight box 100 from top to bottom, the edge of the filter plate 104 is fixedly connected with the airtight box 100, the edge of the piston plate 102 is in sliding connection with the inner wall of the airtight box 100 along the vertical direction and is in sealing fit, and the piston plate 102 and the filter plate 104 divide the inner space of the airtight box 100 into an upper space 108, a middle space 110 and a lower space 112 from top to bottom; the weight box 106 is positioned above the piston plate 102, the top surface of the weight box 106 is fixedly connected with a hanging ring 162, and the crane lifts the weight box 106 through the hanging ring 162; the center of the top surface of the closed box body 100 is provided with an assembly port 114, the bottom surface of the weight box body 106 downwards passes through the assembly port 114 and is fixedly connected with the upper surface of the piston plate 102, the top surface of the weight box body 106 upwards passes through the assembly port 114 to extend above the closed box body 100, and the outer side surface of the weight box body 106 is in sliding connection with the inner side edge of the assembly port 114 along the vertical direction and is in sealing fit; the tube group comprises a waste sulfuric acid input tube 116, a clean sulfuric acid circulating tube 118 and a clean sulfuric acid output tube 120; one end of the waste sulfuric acid input pipe 116 is communicated with the bottom of the middle space 110, and the other end of the waste sulfuric acid input pipe 116 is connected with a waste sulfuric acid source; one end of the clean sulfuric acid circulation pipe 118 is communicated with the bottom of the lower space 112, and the other end of the clean sulfuric acid circulation pipe 118 is communicated with the top of the upper space 108; one end of the clean sulfuric acid output pipe 120 is communicated with the bottom of the middle space 110, and after the piston plate 102 descends to the bottom of the middle space 110, the piston plate 102 is lower than the clean sulfuric acid output pipe 120, and the other end of the clean sulfuric acid output pipe 120 is connected with a clean sulfuric acid source; the valve group comprises a waste sulfuric acid input control valve 122, a clean sulfuric acid circulation control valve 124 and a clean sulfuric acid output control valve 126; a spent sulfuric acid input control valve 122 is mounted on the spent sulfuric acid input pipe 116, a clean sulfuric acid circulation control valve 124 is mounted on the clean sulfuric acid circulation pipe 118, and a clean sulfuric acid output control valve 126 is mounted on the clean sulfuric acid output pipe 120; the top surface of the airtight box 100 is provided with a pressure relief opening 128, and a sealing plug 130 is installed in the pressure relief opening 128.

In operation, in an initial state, all valves in the valve block are in a closed state, and the piston plate 102 is at the bottom of the middle space 110; firstly, opening a waste sulfuric acid control valve and a sealing plug 130, lifting a weight box 106 upwards by using a crane, gradually increasing the volume of a middle space 110, generating negative pressure in the middle space, and sucking waste sulfuric acid in a waste sulfuric acid source into the middle space 110; closing the waste sulfuric acid control valve and the sealing plug 130, separating the lifting hook of the crane from the lifting ring 162, and enabling the weight box 106 to move downwards under the action of gravity to drive the piston plate 102 to slide downwards so as to squeeze air and waste sulfuric acid in the middle space 110; the clean sulfuric acid circulation control valve 124 is opened, the lower space 112 is communicated with the upper space 108 through the clean sulfuric acid circulation pipe 118, under the action of the pressure difference between the middle space 110 and the lower space 112, the waste sulfuric acid in the middle space 110 enters the lower space 112 through the filter plate 104, and meanwhile, the upper space 108 is in a negative pressure state after the sealing plug 130 is closed, so that the pressure difference between the middle space 110 and the lower space 112 is further increased; during this process, particulate impurities in the spent sulfuric acid are filtered to form clean sulfuric acid, which is forced into the lower space 112 through the clean sulfuric acid circulation pipe 118 into the upper space 108; as the extrusion filtration proceeds, the water permeability of the filter plate 104 gradually decreases due to the increasing degree of clogging, and the pressure in the middle space 110 gradually increases due to the increasing weight of the upper surface of the piston plate 102 along with the continuous inflow of clean sulfuric acid, so as to overcome the defect of the decreasing filtration speed caused by the increasing degree of clogging; when the piston plate 102 descends to the bottom of the middle space 110, all waste sulfuric acid in the middle space 110 is filtered by the filter plate 104 and then collected into the upper space 108, and the piston plate 102 moves below the clean sulfuric acid output pipe 120, at this time, the sealing plug 130 and the clean sulfuric acid output control valve 126 are opened, and clean sulfuric acid in the upper space 108 is discharged to a clean sulfuric acid source through the clean sulfuric acid output pipe 120; and closing all valves in the valve group, and repeating the steps to realize the filtration of the waste sulfuric acid. In the whole process, the waste sulfuric acid and the clean sulfuric acid are always in a closed environment, no harmful gas escapes, stable and unchanged pressure is generated by means of the weight box 106, extra power consumption is not needed to maintain the pressure, energy consumption and cost are obviously reduced, the clean sulfuric acid flows into the upper space 108 to increase weight, the weight of the clean sulfuric acid is fully utilized, the filtration speed attenuation effect caused by gradual increase of the blocking degree of the filter plate 104 is compensated, and the filtration working efficiency of the waste sulfuric acid is improved.

In some exemplary implementations of the present example, the tube set further includes a clean water input tube 132, a clean water circulation tube 134, a waste water output tube 136; one end of the purified water input pipe 132 is communicated with the top of the upper space 108, and the other end of the purified water input pipe 132 is connected with a purified water source; one end of the water purifying circulation pipe 134 is communicated with the lower space 112, and the other end of the water purifying circulation pipe 134 is communicated with the top of the upper space 108; one end of the waste water output pipe 136 is communicated with the bottom of the middle space 110, and the other end of the waste water output pipe 136 is connected with a waste water source; the valve group also comprises a clean water input control valve 138, a clean water circulation control valve 140 and a waste water output control valve 142; a clean water input control valve 138 is installed on the clean water input pipe 132, a clean water circulation control valve 140 is installed on the clean water circulation pipe 134, and a wastewater output control valve 142 is installed on the wastewater output pipe 136.

After multiple filtering operations, the blocking degree of the filter plate 104 is continuously increased, the attenuation effect of the filtering speed is continuously overlapped, at this time, the sealing plug 130 is opened, the weight box 106 is lifted, then the sealing plug 130 is closed, the water purification input control valve 138 and the water purification circulation control valve 140 are opened, the weight box 106 is released, the piston is pulled down, the air pressure of the upper space 108 is reduced, purified water of a purified water source is sucked into the upper space 108 through the water purification input pipe 132, the water purification input control valve 138 is closed, the waste water output control valve 142 is opened, the weight box 106 is lifted, the piston is pulled up to pressurize the upper space 108, the purified water of the upper space 108 is pressed into the lower space 112 through the water purification circulation pipe 134, the pressure of the middle space 110 is gradually reduced, under the pressure difference between the middle space 110 and the lower space 112, the purified water of the lower space 112 is transmitted into the middle space 110 through the filter plate 104, in the process, the blocking matters in the filter plate 104 are reversely flushed down by the purified water, the filter plate 102 is cleaned up to the top of the upper space 108, the piston plate 102 is closed, the water circulation control valve 140 is opened, the waste water output control valve 142 is opened, the waste water is discharged from the waste water output through the waste water output control valve 106, and the waste water output pipe 136 is discharged from the middle space 110. In this way, the filter plate 104 is cleaned a plurality of times. After cleaning, the waste sulfuric acid filtering operation with high benefit, low energy consumption and low cost can be performed.

In some exemplary implementations of the present example, the spent sulfuric acid recovery apparatus further includes a bi-directional water pump 144, the stack further includes a counterweight water pipe 146, one end of the counterweight water pipe 146 is in communication with the bottom within the counterweight housing 106, the other end of the counterweight water pipe 146 is connected to one port of the bi-directional water pump 144, and the other port of the bi-directional water pump 144 is connected to a counterweight water source.

The weight of the weight box 106 determines the pressure during filtering of the waste sulfuric acid, the greater the weight of the weight box 106, the greater the osmotic pressure during filtering of the waste sulfuric acid, and the higher the filtering efficiency, but for the condition that the waste sulfuric acid has fewer impurities or smaller particle diameter of the impurities, the filtering may be caused to leak (some tiny impurities may pass through the filter plate 104), so when the weight needs to be reduced, the bidirectional water pump 144 is started to pump part of water in the weight box 106 out, when the weight needs to be increased, the bidirectional water pump 144 is started to inject water into the weight box 106, and it should be understood that the penetration opening of the weight water pipe 146 is far greater than the penetration opening of the weight water pipe 146, and the pressure difference between the inside of the weight box 106 and the outside atmosphere cannot be caused in the process of pumping or injecting water.

As shown in connection with fig. 3, in some exemplary implementations of the present embodiment, the tube set further includes a water purification tube 148, a waste tube 150; one end of the water purifying pipe 148 is communicated with the lower space 112, and the other end of the water purifying pipe 148 is connected with a water purifying source; one end of the waste pipe 150 is communicated with the bottom of the middle space 110, and the other end of the waste pipe 150 is connected with a waste water source; the valve block also comprises a water purification control valve 152 and a wastewater control valve 154; a clean water control valve 152 is installed on the clean water pipe 148, and a waste water control valve 154 is installed on the waste water pipe 150.

In the process of cleaning the filter plate 104, the sealing plug 130 is opened, the water purification control valve 152 is opened, the weight box 106 is lifted, the piston plate 102 is lifted upwards, purified water from a purified water source is sucked into the lower space 112 through the water purification pipe 148 and reversely penetrates through the filter plate 104 to clean the filter plate 104, then the water purification control valve 152 is closed, the wastewater control valve 154 is opened, the weight box 106 is released, the piston plate 102 is lifted downwards, and wastewater in the middle space 110 is discharged to a wastewater source through the wastewater pipe 150. The cleaning mode has higher cleaning efficiency than the mode with the water purifying circulation, but the cleaning degree is reduced each time, and the cleaning mode can be selected according to actual requirements.

In some exemplary embodiments of the present disclosure, an inner seal 156 is fixedly connected to an inner wall of the fitting port 114, the inner seal 156 is tightly fitted to an outer side surface of the weight housing 106, and the fitting port 114 is tightly fitted to the outer side surface of the weight housing 106 through the inner seal 156.

In some exemplary implementations of the present embodiment, an outer sealing ring 158 is fixedly connected to an outer side surface of the piston plate 102, the outer sealing ring 158 is tightly matched with an inner wall of the closed casing 100, and the piston plate 102 is tightly matched with the inner wall of the closed casing through the outer sealing ring 158.

In some exemplary embodiments of the present embodiment, a horizontal water permeable barrier 160 is disposed in the lower space 112, an edge of the water permeable barrier 160 is fixedly connected with the closed casing 100, a lower surface of the filter plate 104 contacts with an upper surface of the water permeable barrier 160 and covers the upper surface of the water permeable barrier 160, and the filter plate 104 is fixedly connected with the water permeable barrier 160.

The water permeable barrier 160 is a porous plate and the filter plate 104 is a microporous ceramic plate.

In some exemplary embodiments of the present embodiment, the lower space 112 is provided with a limiting cylinder 164, the lower end of the limiting cylinder 164 is fixedly connected with the bottom surface of the lower space 112, the outer side surface of the limiting cylinder 164 is tightly matched with the inner wall of the closed box 100, the water permeable partition 160 and the filter plate 104 are located inside the limiting cylinder 164, and the edge of the water permeable partition 160 is fixedly connected with the inner wall of the limiting cylinder 164.

The limiting cylinder 164 is used for limiting the downward movement of the piston plate 102 and supporting the piston plate 102 downward to the bottom of the middle space 110.

In some exemplary implementations of this embodiment, enclosure 100 and weight housing 106 are each vertically cylindrical in shape.

In some exemplary implementations of this example, the spent sulfuric acid recovery apparatus further includes a controller, and the valves in the valve block are each solenoid valves and are each connected to the controller.

The switch of each valve in the working process is controlled in a linkage way through a controller (a PLC controller is adopted, not shown in the figure), for example, the valves which are required to be opened or closed simultaneously work synchronously, so that the working efficiency is improved.

In this embodiment, "waste sulfuric acid source, clean sulfuric acid source, waste water source, clean water source, and counterweight water source" refers to a container for holding or for holding a corresponding liquid, for example, waste sulfuric acid source refers to a container for holding or holding waste sulfuric acid, and these containers may be any container in the prior art, may be a tank or a box, or may be a can, which is not improved in the present application, and therefore, not shown in the drawings, and in addition, any crane in the prior art may be used, so long as the counterweight box 106 can be lifted, which is not improved, and therefore, the crane is not shown in the drawings.

The foregoing description of embodiments of the application has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

The foregoing description of embodiments of the application has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. The waste sulfuric acid recovery device is characterized by comprising a closed box body (100), a piston plate (102), a filter plate (104), a weight box body (106), a crane, a pipe group and a valve group;

The piston plate (102) and the filter plate (104) are horizontally arranged inside the closed box body (100) from top to bottom, the edge of the filter plate (104) is fixedly connected with the closed box body (100), the edge of the piston plate (102) is in sliding connection with the inner wall of the closed box body (100) along the vertical direction and in sealing fit, and the inner space of the closed box body (100) is divided into an upper space (108), a middle space (110) and a lower space (112) by the piston plate (102) and the filter plate (104) from top to bottom;

The weight box body (106) is positioned above the piston plate (102), a hanging ring (162) is fixedly connected to the top surface of the weight box body (106), and the crane lifts the weight box body (106) through the hanging ring (162);

an assembly port (114) is formed in the center of the top surface of the closed box body (100), the bottom surface of the weight box body (106) downwards penetrates through the assembly port (114) and is fixedly connected with the upper surface of the piston plate (102), the top surface of the weight box body (106) upwards penetrates through the assembly port (114) to extend to the position above the closed box body (100), and the outer side surface of the weight box body (106) is in sliding connection with the inner side edge of the assembly port (114) along the vertical direction and is in sealing fit;

the pipe group comprises a waste sulfuric acid input pipe (116), a clean sulfuric acid circulating pipe (118) and a clean sulfuric acid output pipe (120);

One end of the waste sulfuric acid input pipe (116) is communicated with the bottom of the middle space (110), and the other end of the waste sulfuric acid input pipe (116) is connected with a waste sulfuric acid source;

One end of the clean sulfuric acid circulating pipe (118) is communicated with the bottom of the lower space (112), and the other end of the clean sulfuric acid circulating pipe (118) is communicated with the top of the upper space (108);

one end of the clean sulfuric acid output pipe (120) is communicated with the bottom of the middle space (110), and after the piston plate (102) descends to the bottom of the middle space (110), the piston plate (102) is lower than the clean sulfuric acid output pipe (120), and the other end of the clean sulfuric acid output pipe (120) is connected with a clean sulfuric acid source;

The valve group comprises a waste sulfuric acid input control valve (122), a clean sulfuric acid circulation control valve (124) and a clean sulfuric acid output control valve (126);

the waste sulfuric acid input control valve (122) is arranged on the waste sulfuric acid input pipe (116), the clean sulfuric acid circulation control valve (124) is arranged on the clean sulfuric acid circulation pipe (118), and the clean sulfuric acid output control valve (126) is arranged on the clean sulfuric acid output pipe (120);

the top surface of airtight box (100) is equipped with pressure release mouth (128), install sealing plug (130) in pressure release mouth (128).

2. The waste sulfuric acid recovery apparatus according to claim 1, characterized in that the pipe group further comprises a purified water input pipe (132), a purified water circulation pipe (134), a waste water output pipe (136);

one end of the purified water input pipe (132) is communicated with the top of the upper space (108), and the other end of the purified water input pipe (132) is connected with a purified water source;

One end of the water purifying circulating pipe (134) is communicated with the lower space (112), and the other end of the water purifying circulating pipe (134) is communicated with the top of the upper space (108);

one end of the waste water output pipe (136) is communicated with the bottom of the middle space (110), and the other end of the waste water output pipe (136) is connected with a waste water source;

The valve group also comprises a purified water input control valve (138), a purified water circulation control valve (140) and a wastewater output control valve (142);

The water purification input control valve (138) is installed on the water purification input pipe (132), the water purification circulation control valve (140) is installed on the water purification circulation pipe (134), and the wastewater output control valve (142) is installed on the wastewater output pipe (136).

3. The spent sulfuric acid recovery apparatus according to claim 1, further comprising a bi-directional water pump (144), the stack further comprising a counter weight water pipe (146), one end of the counter weight water pipe (146) being in communication with the bottom inside the counter weight tank (106), the other end of the counter weight water pipe (146) being connected to one port of the bi-directional water pump (144), the other port of the bi-directional water pump (144) being connected to a counter weight water source.

4. The spent sulfuric acid recovery apparatus according to claim 1, wherein the tube group further comprises a water purifying tube (148), a waste water tube (150);

One end of the water purifying pipe (148) is communicated with the lower space (112), and the other end of the water purifying pipe (148) is connected with a water purifying source;

One end of the waste pipe (150) is communicated with the bottom of the middle space (110), and the other end of the waste pipe (150) is connected with a waste water source;

the valve group also comprises a water purifying control valve (152) and a waste water control valve (154);

The clean water control valve (152) is mounted on the clean water pipe (148), and the waste water control valve (154) is mounted on the waste water pipe (150).

5. The waste sulfuric acid recovery device according to claim 1, characterized in that an inner sealing ring (156) is fixedly connected to the inner wall of the assembly port (114), the inner sealing ring (156) is tightly matched with the outer side surface of the weight box (106), and the assembly port (114) is in sealing fit with the outer side surface of the weight box (106) through the inner sealing ring (156).

6. The waste sulfuric acid recovery apparatus according to claim 1, wherein an outer sealing ring (158) is fixedly connected to an outer side surface of the piston plate (102), the outer sealing ring (158) is tightly matched with an inner wall of the closed box body (100), and the piston plate (102) is in sealing fit with the inner wall of the closed box body through the outer sealing ring (158).

7. The waste sulfuric acid recovery apparatus according to claim 1, wherein a horizontal water permeable partition plate (160) is provided in the lower space (112), an edge of the water permeable partition plate (160) is fixedly connected with the closed box body (100), a lower surface of the filter plate (104) is in contact with an upper surface of the water permeable partition plate (160) and covers an upper surface of the water permeable partition plate (160), and the filter plate (104) is fixedly connected with the water permeable partition plate (160).

8. The waste sulfuric acid recovery apparatus according to claim 7, wherein the lower space (112) is provided with a limiting cylinder (164), the lower end of the limiting cylinder (164) is fixedly connected with the bottom surface of the lower space (112), the outer side surface of the limiting cylinder (164) is tightly matched with the inner wall of the closed box (100), the water permeable partition plate (160) and the filter plate (104) are positioned inside the limiting cylinder (164), and the edge of the water permeable partition plate (160) is fixedly connected with the inner wall of the limiting cylinder (164).

9. The waste sulfuric acid recovery apparatus according to claim 1, characterized in that the shape of the closed casing (100) and the weight casing (106) are each a vertical cylindrical shape.

10. The spent sulfuric acid recovery apparatus according to any one of claims 1 to 9, further comprising a controller, wherein the valves in the valve block are each solenoid valves and are connected to the controller.