Gas inletting type filter press

Abstract

The utility model discloses a pressure filter capable of introducing gas. The pressure filter comprises a pressure filter main body and a gas injection mechanism, the filter press main body is connected with a liquid inlet pipe; the gas injection mechanism is installed on the liquid inlet pipe and comprises a gas injection pipe, a gas inlet pipe is connected to the gas injection pipe, a control valve is installed on the gas inlet pipe, a plurality of through holes are formed in the side wall of the end, located in the gas injection pipe, of the gas inlet pipe, a first flange is connected to the liquid inlet pipe, and the liquid inlet pipe is matched with the second flange through the first flange. According to the utility model, carbon dioxide gas can be introduced into the filter press in a multi-channel manner, including introducing the carbon dioxide gas into feed slurry and introducing the carbon dioxide gas in a filter pressing process, so that parts, which do not fully react with carbon dioxide, in the slurry and a filter cake are further mineralized; furthermore, the mineralization efficiency of the steel slag powder liquid can be improved, meanwhile, high-concentration carbon dioxide gas discharged out of the filter press can be recycled, and the utilization rate of the carbon dioxide gas is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of filter presses, and particularly relates to a gas-inlet type filter press. Background Art

[0002] A filter press is a commonly used solid-liquid separation device. It applies a certain pressure to an object using a special filter medium, allowing the liquid to permeate out, thereby achieving solid-liquid separation. The structure of the filter press includes a frame, filter plates, a pressing system, a constant-pressure control cabinet, etc. During operation, the oil cylinder pushes the pressing plate to press each filter plate to form a filter chamber. The material enters through the finger-pushing plate hole. Solid particles are retained in the filter chamber to form a filter cake, and the liquid is discharged through the filtrate channels combined by each filter plate. When the pressure reaches the set value, diaphragm pressing starts to mechanically squeeze the filter cake, further reducing its moisture content. At the same time, the filter press also has the function of blowing the cake, and compressed air can be introduced to further reduce the moisture content of the filter cake. Finally, the plate-pulling manipulator is activated to pull the filter plates, and the filter cake automatically detaches from the filter plates and falls into the mud bucket.

[0003] When filtering materials such as steel slag powder during carbon dioxide mineralization treatment, a filter press is also used. It is mainly installed at the end of the treatment to filter the mineralized slurry, thereby obtaining the mineralized material and recycled water. However, when the filter press filters the mineralized slurry, the slurry before entering the plate frame and the initially formed wet filter cake can still further undergo mineralization reactions to varying degrees. If direct filter pressing is carried out by blowing the cake with compressed air, the full-process steel slag mineralization efficiency cannot be maximized.

[0004] Therefore, in view of the above technical problems, it is necessary to provide a gas-inlet type filter press to extend the reaction process to the filtering stage and maximize the reaction efficiency throughout the whole process.

[0005] The information disclosed in this background art section is only intended to enhance the overall understanding of the present utility model and should not be construed as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a gas-inlet type filter press, which can extend the reaction process to the filtering stage and maximize the reaction efficiency throughout the whole process.

[0007] To achieve the above purpose, the technical solution provided by a specific embodiment of the present utility model is as follows:

[0008] A gas-inlet type filter press includes: a filter press main body and an air injection mechanism;

[0009] A liquid inlet pipe is connected to the filter press main body;

[0010] The gas injection mechanism is installed on the liquid inlet pipe. The gas injection mechanism includes a gas injection pipe, an air inlet pipe is connected to the gas injection pipe, a control valve is installed on the air inlet pipe, and a plurality of through holes are provided on the side wall of one end of the air inlet pipe located inside the gas injection pipe.

[0011] In one or more embodiments of the present invention, a first flange is connected to the liquid inlet pipe, and through the mutual cooperation of the first flange and the second flange, the gas injection mechanism is installed on the liquid inlet pipe;

[0012] A sealing groove is provided on the first flange for accommodating a sealing member to seal the connection gap between the first flange and the second flange, so that carbon dioxide gas is not easily leaked from the gap between the first flange and the second flange.

[0013] In one or more embodiments of the present invention, the diameter of the gas injection pipe is larger than the diameter of the liquid inlet pipe. The gas injection pipe is used to accommodate the air inlet pipe, so as to inject carbon dioxide gas into the gas injection pipe through the air inlet pipe, so that the carbon dioxide gas can react with the slurry flowing in the liquid inlet pipe, and then the slurry flowing in the liquid inlet pipe can be further mineralized before solid-liquid separation;

[0014] Both ends of the gas injection pipe are connected with second flanges, and through the mutual cooperation of the first flange and the second flange, the gas injection mechanism is installed on the liquid inlet pipe.

[0015] In one or more embodiments of the present invention, a flow guide member is connected to one end of the air inlet pipe located inside the gas injection pipe, which is used to play a guiding role, so that the slurry is not easily impacted on the air inlet pipe, and thus the service life of the air inlet pipe can be guaranteed;

[0016] The flow guide member is conical, which can ensure the guiding effect of the flow guide member.

[0017] In one or more embodiments of the present invention, a cleaning pipe is connected to the air inlet pipe, and a cleaning liquid can be introduced through the cleaning pipe to backwash the air inlet pipe, so that the through holes on the air inlet pipe are not easily blocked by impurities in the slurry flowing in the liquid inlet pipe;

[0018] A plug is installed on the cleaning pipe for blocking the cleaning pipe.

[0019] In one or more embodiments of the present invention, a check valve is installed on the air inlet pipe, and the check valve is arranged between the cleaning pipe and the gas injection pipe, so that the carbon dioxide gas flowing in the air inlet pipe or the slurry flowing in the gas injection pipe is not easily backflowed, ensuring the mixing effect of the carbon dioxide gas and the slurry, so that the carbon dioxide gas can react with the slurry.

[0020] In one or more embodiments of the present utility model, a sealing member is embedded in the second flange, and one side of the sealing member is disposed in the sealing groove. By providing the sealing member, the sealing effect between the first flange and the second flange can be enhanced, making it difficult for carbon dioxide gas or slurry to leak from the gap between the first flange and the second flange.

[0021] In one or more embodiments of the present utility model, a receiving groove is provided in the sealing member, and a sealing liquid is filled in the receiving groove.

[0022] In one or more embodiments of the present utility model, the sealing liquid is a flowing liquid.

[0023] In one or more embodiments of the present utility model, an expansion portion is provided on the side wall of the sealing member located in the sealing groove, and the sealing liquid is in contact with the expansion portion. When the sealing member is installed between the first flange and the second flange, the sealing member is squeezed. At this time, the sealing liquid will squeeze the expansion portion, causing the expansion portion to expand outward to fill the sealing groove, thereby achieving a better sealing effect.

[0024] Compared with the prior art, a gas-introducible filter press of the present utility model can introduce carbon dioxide gas into the filter press in multiple channels, including introducing carbon dioxide gas into the feed slurry and introducing carbon dioxide gas during the filtration process, enabling further mineralization of the parts in the slurry and filter cake that have not fully reacted with carbon dioxide, thereby improving the mineralization efficiency of the steel slag powder liquid. At the same time, the high-concentration carbon dioxide gas discharged from the filter press can be reused to improve the utilization rate of carbon dioxide gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 It is a three-dimensional view of a gas-introducible filter press in an embodiment of the present utility model;

[0027] Figure 2 is Figure 1 a schematic structural view of part A in

[0028] Figure 3 It is a partial structural view of a gas-introducible filter press in an embodiment of the present utility model;

[0029] Figure 4 isFigure 3 Schematic diagram of the structure at position A in

[0030] Figure 5 is Figure 3 Schematic diagram of the structure at position B in

[0031] Description of main reference numerals:

[0032] 1 - Filter press main body, 101 - Liquid inlet pipe, 102 - First flange, 103 - Blowing pipe, 104 - Exhaust pipe, 105 - Connecting pipe, 106 - Branch pipe, 107 - Exhaust vent pipe, 2 - Gas injection mechanism, 201 - Gas injection pipe, 202 - Second flange, 203 - Inlet air pipe, 204 - Control valve, 205 - Through hole, 206 - Flow guiding member, 207 - Cleaning pipe, 208 - Sealing member, 209 - Sealing liquid, 210 - Expansion part. Detailed implementation manners

[0033] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] As Figures 1 to 5 shown, a gas - injectable filter press in an embodiment of the present utility model includes a filter press main body 1 and a gas injection mechanism 2.

[0035] Among them, a liquid inlet pipe 101 is connected to the filter press main body 1. The mineralized slurry can be transported to the filter press main body 1 through the liquid inlet pipe 101 so as to filter the mineralized slurry for separating the solids and liquids in the slurry.

[0036] In addition, a first flange 102 is connected to the liquid inlet pipe 101. Through the mutual cooperation of the first flange 102 and the second flange 202, the gas injection mechanism 2 is installed on the liquid inlet pipe 101.

[0037] Specifically, a sealing groove is provided on the first flange 102 for accommodating the sealing member 208 to seal the connection gap between the first flange 102 and the second flange 202, so that carbon dioxide gas is not easily leaked from the gap between the first flange 102 and the second flange 202, ensuring the reaction effect between the carbon dioxide gas and the slurry, and at the same time controlling the leakage of the carbon dioxide gas.

[0038] As Figures 1 to 5As shown in the figure, a pair of air blowing pipes 103 and an air outlet pipe 104 are installed on the filter press main body 1. The air blowing pipe 103 is also used to introduce carbon dioxide into the filter press main body 1, so that carbon dioxide gas can enter between each filter plate in the filter press main body 1 and further react with the wet filter cake. The air outlet pipe 104 is used to discharge the gas in the filter press main body 1, so that the gas is not likely to affect the normal use of the filter press main body 1.

[0039] Among them, a gas detector is installed in the air outlet pipe 104 to detect the concentration of the discharged gas. If the gas detector detects that the discharged gas is high-concentration carbon dioxide, the discharged gas can be controlled to re-enter the filter press main body 1 through the air blowing pipe 103 and the air inlet pipe 203 for reaction, so that the carbon dioxide gas is fully utilized. If the gas detector detects that the discharged gas is low-concentration carbon dioxide gas, such as carbon dioxide with a concentration of 10% or 20%, the discharged gas can be discharged through the exhaust pipe 107 under the condition of meeting the emission standard.

[0040] In addition, a connecting pipe 105 is connected between a pair of air blowing pipes 103. The connecting pipe 105 is communicated with the air outlet pipe 104. A branch pipe 106 is connected between the connecting pipe 105 and the air inlet pipe 203. If the gas detector detects that the discharged gas is high-concentration carbon dioxide, the gas in the air outlet pipe 104 can enter the air blowing pipe 103 and the air inlet pipe 203 respectively through the connecting pipe 105 and the branch pipe 106, and then can enter the filter press main body 1 for re-reaction, so that the carbon dioxide gas is fully utilized.

[0041] Specifically, an exhaust pipe 107 is installed on the air outlet pipe 104. If the gas detector detects that the discharged gas is low-concentration carbon dioxide gas, such as carbon dioxide with a concentration of 10% or 20%, the gas in the air outlet pipe 104 can be discharged through the exhaust pipe 107 under the condition of meeting the gas emission standard.

[0042] In addition, switch valves are installed on the connecting pipe 105, the branch pipe 106 and the exhaust pipe 107 to control the gas flow direction in the air outlet pipe 104.

[0043] Preferably, in order to ensure the safety of the staff, when the introduced gas is non-air gas, gas detectors and alarm devices also need to be installed between the air blowing pipe 103, the air inlet pipe 203, the air outlet pipe 104, the exhaust pipe 107 and each filter plate in the filter press main body 1 to detect the oxygen content and the carbon dioxide content to ensure the safety of on-site operators.

[0044] Such as Figures 1 to 5As shown, the gas injection mechanism 2 is installed on the liquid inlet pipe 101. The gas injection mechanism 2 is used to inject carbon dioxide gas into the liquid inlet pipe 101, so as to use the carbon dioxide gas to react with the slurry, and then the steel slag and the like can be mineralized more fully, improving the mineralization efficiency of the steel slag powder.

[0045] Among them, the gas injection mechanism 2 includes an injection pipe 201. The diameter of the injection pipe 201 is larger than that of the liquid inlet pipe 101. The injection pipe 201 is used to accommodate an inlet pipe 203, so as to inject carbon dioxide gas into the injection pipe 201 through the inlet pipe 203, enabling the carbon dioxide gas to react with the slurry flowing in the liquid inlet pipe 101, and then further mineralizing the slurry flowing in the liquid inlet pipe 101 before solid-liquid separation.

[0046] In addition, both ends of the injection pipe 201 are connected with second flanges 202. Through the mutual cooperation of the first flange 102 and the second flange 202, the gas injection mechanism 2 is installed on the liquid inlet pipe 101.

[0047] Specifically, an inlet pipe 203 is connected to the injection pipe 201. The inlet pipe 203 is connected to an external carbon dioxide gas source. Compressed carbon dioxide gas can enter the injection pipe 201 through the inlet pipe 203 and then be discharged through a number of through holes 205, so as to be mixed with the slurry flowing in the injection pipe 201, and then it is convenient for the carbon dioxide gas to react with the slurry.

[0048] In addition, a control valve 204 is installed on the inlet pipe 203. The control valve 204 is used to control the on-off of the inlet pipe 203. A number of through holes 205 are provided on the side wall of the end of the inlet pipe 203 located inside the injection pipe 201. The compressed carbon dioxide gas entering the injection pipe 201 through the inlet pipe 203 is discharged into the interior of the injection pipe 201 through the through holes 205, so that the carbon dioxide gas can react with the slurry.

[0049] As Figures 1 to 5 shown, a flow guiding member 206 is connected to the end of the inlet pipe 203 located inside the injection pipe 201, which is used to play a flow guiding role, so that the slurry is not likely to directly impact the inlet pipe 203, and then the service life of the inlet pipe 203 can be guaranteed.

[0050] Preferably, the flow guiding member 206 is conical, which can ensure the flow guiding effect of the flow guiding member 206.

[0051] Among them, a cleaning pipe 207 is connected to the inlet pipe 203. The cleaning pipe 207 can be connected to external clean water. The cleaning pipe 207 can be used to introduce clean liquid into the injection pipe 201, so as to perform backwashing on the inlet pipe 203, making the through holes 205 on the inlet pipe 203 not easily blocked by the solid particles of the slurry flowing in the liquid inlet pipe 101, and ensuring the subsequent use effect of the inlet pipe 203.

[0052] In addition, a plug is installed on the cleaning pipe 207 for blocking the cleaning pipe 207.

[0053] Specifically, a check valve is installed on the air inlet pipe 203. The check valve is arranged between the cleaning pipe 207 and the injection pipe 201, so that the carbon dioxide gas flowing in the air inlet pipe 203 or the slurry flowing in the injection pipe 201 is not easily backflowed, ensuring the mixing effect of the carbon dioxide gas and the slurry, so that the carbon dioxide gas and the slurry can react.

[0054] As Figures 1 to 5 shown, a seal 208 is embedded in the second flange 202, and one side of the seal 208 is arranged in the seal groove. By providing the seal 208, the sealing effect between the first flange 102 and the second flange 202 can be increased, so that the carbon dioxide gas or the slurry is not easily leaked from the gap between the first flange 102 and the second flange 202.

[0055] Among them, a receiving groove is provided in the seal 208, and a sealing liquid 209 is filled in the receiving groove. The sealing liquid 209 is a flowing liquid. When the seal 208 is installed between the first flange 102 and the second flange 202, the sealing liquid 209 is squeezed, and the sealing liquid 209 has a force on the expansion part 210, causing the expansion part 210 to expand, so that the seal 208 can fill the seal groove, and thus a better sealing effect can be achieved to reduce the leakage of the carbon dioxide gas or the slurry.

[0056] In addition, an expansion part 210 is provided on the side wall of the seal 208 located in the seal groove, and the sealing liquid 209 is in contact with the expansion part 210. When the seal 208 is installed between the first flange 102 and the second flange 202, the seal 208 is squeezed. At this time, the sealing liquid 209 will squeeze the expansion part 210, causing the expansion part 210 to expand outwards for filling the seal groove, and thus a better sealing effect can be achieved.

[0057] During specific use, the injection pipe 201 is installed on the liquid inlet pipe 101 through the mutual cooperation of the first flange 102 and the second flange 202. When installing the injection pipe 201, it is also necessary to place the seal 208 between the first flange 102 and the second flange 202. When the seal 208 is installed between the first flange 102 and the second flange 202, the seal 208 is squeezed by the first flange 102 and the second flange 202. At this time, the sealing liquid 209 will squeeze the expansion part 210, causing the expansion part 210 to expand outwards for filling the seal groove on the first flange 102, and thus a better sealing effect can be achieved to reduce the subsequent leakage of the carbon dioxide gas or the slurry from the gap between the first flange 102 and the second flange 202.

[0058] The mineralized slurry is transported through the liquid inlet pipe 101 to the filter press main body 1 for filtration. The control valve 204 is opened, and the compressed carbon dioxide gas enters the injection pipe 201 through the gas inlet pipe 203 and then is discharged through a number of through holes 205. At this time, the carbon dioxide gas can contact and react with the slurry in the injection pipe 201, enabling the slurry to be better mineralized and improving the mineralization efficiency of the steel slag powder liquid. The slurry for solid-liquid separation enters the filter press main body 1 for filtration while reacting, for separating the precipitate in the liquid.

[0059] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0060] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gas-permeable filter press, characterized in that: include: A filter press body, wherein a liquid inlet pipe is connected to the filter press body; The gas injection mechanism is installed on the liquid inlet pipe. The gas injection mechanism includes a gas injection pipe. The gas injection pipe is connected to an air inlet pipe. A control valve is installed on the air inlet pipe. A side wall of one end of the air inlet pipe located in the gas injection pipe is provided with a plurality of through holes.

2. A gas-permeable filter press according to claim 1, characterized in that: The liquid inlet pipe is connected with a first flange, and the first flange is provided with a sealing groove.

3. A gas-permeable filter press according to claim 2, characterized in that: The diameter of the gas injection pipe is greater than the diameter of the liquid inlet pipe, and both ends of the gas injection pipe are connected with a second flange.

4. A gas-permeable filter press according to claim 1, characterized in that: One end of the air inlet pipe located in the air injection pipe is connected with a flow guide, and the flow guide is conical.

5. A gas-permeable filter press according to claim 1, characterized in that: The air inlet pipe is connected with a cleaning pipe, and a plug is installed on the cleaning pipe.

6. A gas-permeable filter press according to claim 5, characterized in that: A check valve is installed on the air inlet pipe, and the check valve is arranged between the cleaning pipe and the air injection pipe.

7. A gas-permeable filter press according to claim 3, characterized in that: A sealing member is embedded in the second flange, and one side of the sealing member is arranged in the sealing groove.

8. A gas-permeable filter press according to claim 7, characterized in that: The sealing member is provided with a receiving groove, and the receiving groove is filled with a sealing liquid.

9. A gas-permeable filter press according to claim 8, characterized in that: The sealing liquid is a fluid liquid.

10. A gas-permeable filter press according to claim 9, characterized in that: The side wall of the sealing member located in the sealing groove is provided with an expansion portion, and the sealing liquid is in contact with the expansion portion.

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