Thickening device of high-pressure dispersion system

Abstract

The utility model provides a thickening device of a high-pressure dispersion system. The interior of the closed shell is divided into an upper section, a middle section and a lower section by an upper tube plate and a lower tube plate which are in circumferential sealing connection with the inner wall of the closed shell; the multi-tube filter element comprises a plurality of filter element tubes, each filter element tube penetrates through the upper tube plate and the lower tube plate and is provided with permeation holes in the transverse direction of the axial direction of the filter element tubes, and part of liquid in a high-pressure dispersion system transversely permeates into a clear liquid cavity between the inner wall of the closed shell and the outer wall of the multi-tube filter element through the permeation holes; the guide cone funnel is arranged at the lower section of the closed shell and is used for receiving the concentrated liquid flowing out of the outlet hole; and the clear liquid recovery hole is formed in the upper part of the middle section of the closed shell, is communicated with the clear liquid cavity, and is used for extracting clear liquid in the clear liquid cavity through a clear liquid recovery valve which is connected with the clear liquid recovery hole and is arranged outside the closed shell.

Description

Technical Field

[0001] The present disclosure relates to the technical field of high-pressure solid-liquid mixture filtering devices, and in particular to a high-pressure dispersion system thickening device for removing a dispersant in a solid-liquid mixture dispersion system. Background Art

[0002] Thickening technology is widely used in mining, metallurgy, chemical industry, environmental protection and other industries. It is an important method in separation unit operation. It is an industrial technology that removes the dispersant-clear liquid in the solid-liquid dispersion system from the solid-liquid dispersion system and increases (thickens) the concentration of the dispersed substance-solid in the residual turbid liquid.

[0003] The thickening device currently used in industry is based on sedimentation technology. It uses the difference in properties of different liquid and solid substances in the solid-liquid dispersion system to produce different descending speeds during the sedimentation process under the combined effects of gravity, buoyancy and system resistance, thereby achieving the solid-liquid separation goal of thickening at the bottom and clarifying at the top.

[0004] In industry, sedimentation tanks are usually used to complete thickening tasks. The sedimentation tank is a wide-mouth, cone-bottomed device with a built-in rotary rake at the bottom. The rake frame is placed on the top of the wide-mouthed device and is used to arrange the liquid inlet, the dosing port, and the lifting and rotating power facilities of the rotary rake. Due to the special equipment shape and operation requirements, all current sedimentation tanks are normal pressure equipment. If there is a certain pressure in the state of the incoming material dispersion system, the system pressure must be released first to make it a normal pressure system before solid-liquid separation can be performed. However, in actual industrial processing systems, the solid-liquid dispersion system generated is usually a high-temperature and high-pressure system or dispersion system. For example, the coal chemical black water (turbid water containing solid coal ash particles) system has a black water pressure of 65 bar and a temperature of 240°C. In order to meet the current technical requirements for thickening and dehydration, the black water system is first cooled and decompressed. When the system reaches normal temperature and pressure, it enters the thickening system of the sedimentation tank. The recovered clean water is pressurized to a certain pressure before returning to the gasifier. The thickened mud is dehydrated by the vacuum filter and then landfilled. This treatment method wastes a lot of heat and power energy. Therefore, there is an urgent need for a thickening device that can handle high-pressure solid-liquid dispersions. The device can directly perform solid-liquid separation without depressurizing or cooling the mixed dispersion to achieve a thickening effect, and then recover the pressurized clear liquid to avoid wasting pressure energy.

[0005] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0006] In view of this, the present disclosure provides a thickening device for a high-pressure solid-liquid dispersion system, which realizes direct thickening processing without pressure relief and at high temperature to obtain a high-pressure and high-temperature clear liquid, thereby saving energy.

[0007] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by the practice of the present disclosure.

[0008] According to one aspect of an embodiment of the present disclosure, a thickening device for a high-pressure dispersion system is provided, comprising: a closed shell, the interior of which is divided into an upper section, a middle section and a lower section by an upper tube plate and a lower tube plate circumferentially sealed to the inner wall thereof; a multi-tube filter element, arranged in the middle section of the closed shell, comprising a plurality of filter core tubes, each filter core tube penetrating the upper tube plate and the lower tube plate, and having a penetration hole transverse to the axial direction of the filter core tube, the high-pressure dispersion system flows from the feed cavity between the upper tube plate and the feed port arranged in the upper section of the closed shell through the inlet hole located in the upper tube plate at a predetermined speed into the corresponding filter core tube, and flows from the feed cavity located in the The corresponding outlet hole of the lower tube plate flows out from the filter core tube, so that part of the liquid in the high-pressure dispersion system laterally penetrates into the clear liquid cavity between the inner wall of the closed shell and the outer wall of the multi-tube filter core through the penetration hole; a guiding cone funnel is arranged in the lower section of the closed shell, and its cone bottom is sealed with the inner wall of the closed shell and faces the outlet hole of the filter core tube on the lower tube plate, so as to receive the concentrated liquid flowing out from the outlet hole; and a clear liquid recovery hole is arranged in the upper part of the middle section of the closed shell, communicated with the clear liquid cavity, and the clear liquid in the clear liquid cavity is extracted through a clear liquid recovery valve connected to it and arranged outside the closed shell.

[0009] According to the thickening device of the high-pressure dispersion system disclosed in the present invention, it is characterized by further comprising: a flow guide arranged at the inlet hole of each upper tube plate, the flow guide being a tubular component, the diameter of the outlet end thereof facing the inlet hole being 1 / 3 to 1 / 10 of the inner diameter of the filter core tube, and extending into the filter core tube for a predetermined length, the flow guide end thereof facing the feed chamber being formed with a flanged annular plate, the outer diameter of the annular plate being equal to or greater than the outer diameter of the filter core tube.

[0010] The thickening device of the high-pressure dispersion system disclosed in the present invention is characterized in that it also includes: a middle partition plate, which is arranged between the upper tube plate and the lower tube plate in parallel with the vertical arrangement direction of the multi-tube filter element, and the edges around it are sealed and connected to the inner wall of the closed shell, the lower surface of the upper tube plate and the upper surface of the lower tube plate, so as to divide the clear liquid chamber into two or more sub-clear liquid chambers.

[0011] According to the thickening device of the high-pressure dispersion system disclosed in the present invention, it is characterized in that the predetermined angle is a right angle or an obtuse angle between the axis of the permeation hole and the flow direction of the fluid in the filter core tube, and the inlet hole of the upper tube plate is an inverted frustum.

[0012] The thickening device of the high-pressure dispersion system according to the present disclosure is characterized in that it also includes a backwash hole, which is arranged in the middle or lower part of the middle section of the closed shell and is connected to the clear liquid chamber, and backwash liquid is injected into the clear liquid chamber or a selected sub-clear liquid chamber via a backwash valve connected thereto and arranged outside the closed shell.

[0013] The thickening device of the high-pressure dispersion system according to the present disclosure is characterized in that the backwash liquid is the clear liquid output through the clear liquid recovery valve.

[0014] The thickening device of the high-pressure dispersion system disclosed in the present invention is characterized in that the pressure difference between the pressure in the filter core tube and the pressure in the clear liquid chamber is within 4 bar.

[0015] According to the thickening device of the high-pressure dispersion system disclosed in the present invention, it is characterized by also including a receiving cone hopper connected to the end of the lower section of the closed shell, and a sedimentation tank is formed between the inner wall of the receiving cone hopper and the outer wall of the guiding cone funnel, so that the solids in the concentrated liquid sprayed from the cone end outlet of the guiding cone funnel are settled at the bottom of the sedimentation tank, and a dilute liquid cavity for accommodating the dilute liquid layer is formed in the cavity between the outer wall of the guiding cone funnel and the lower section of the closed shell.

[0016] According to the thickening device of the high-pressure dispersion system disclosed in the present invention, it is characterized by also including a dilute liquid circulation hole, which is arranged at the lower section of the closed shell and is connected to the dilute liquid chamber containing the dilute liquid layer between the closed shell and the outer wall of the guide cone funnel, and the dilute liquid in the dilute liquid chamber is extracted through a dilute liquid circulation valve arranged outside the closed shell and connected thereto.

[0017] The thickening device of the high-pressure dispersion system according to the present disclosure is characterized in that it also includes a dilute liquid injection port arranged at the upper position of the closed shell, so that the dilute liquid in the dilute liquid chamber is pumped to the dilute liquid injection port via a circulation valve under the pumping of a dilute liquid circulation pump, and then injected into the feed chamber to preliminarily dilute the high-pressure dispersion system in the feed chamber.

[0018] In the disclosed embodiment, according to the thickening device of the high-pressure dispersion system of the present disclosure, a filtration surface (the inner wall surface of the filter core tube) is formed in a direction parallel to the flow direction of the solid-liquid dispersion system by using a transverse permeation hole with the axial direction of the filter core tube, thereby realizing a cross-flow filtration state. In this cross-flow filtration state, due to the pressure difference between the inside and outside of the filter core tube, the flow direction of the clear liquid in the solid-liquid dispersion system changes by nearly 90 degrees, and passes through the filter surface at an angle close to 90 degrees to the initial flow direction. At the same time, the mixed system flowing parallel to the filter surface is concentrated due to the loss of the clear liquid, so that the solid particles cannot accumulate on the filter surface, but continue to move forward along the original flow direction until they flow out of the filter core tube, thereby realizing continuous solid-liquid separation. Compared with the prior art, it greatly saves the thickening step, recovers a large amount of pressure energy and heat energy, and reduces the need for frequent backwashing of the thickening device.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 It is a schematic structural diagram of a thickening device of a high-pressure dispersion system according to an exemplary embodiment.

[0022] Figure 2A and 2B It is a schematic structural diagram of a filter core tube in a thickening device according to an exemplary embodiment.

[0023] Figure 3A and 3B It is a schematic structural diagram of an upper tube plate in a thickening device according to an exemplary embodiment. DETAILED DESCRIPTION

[0024] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0025] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

[0026] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0027] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0028] It should be understood that although the terms first, second, third, etc. may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another component. Therefore, the first component discussed below can be referred to as the second component without departing from the teachings of the disclosed concepts. As used herein, the term "and / or" includes any one of the associated listed items and all combinations of one or more.

[0029] Those skilled in the art will appreciate that the drawings are merely schematic diagrams of example embodiments, and the modules or processes in the drawings are not necessarily necessary for implementing the present disclosure, and therefore cannot be used to limit the protection scope of the present disclosure.

[0030] Figure 1 FIG. 1 is a schematic diagram of a thickening device of a high pressure dispersion system according to an exemplary embodiment. Figure 1As shown, the embodiment of the present disclosure provides a thickening device 100 for a high-pressure dispersion system, which adopts a transverse permeable hole with an axial direction of the filter core tube, and forms a filter surface (the inner wall surface of the filter core tube) in a direction parallel to the flow direction of the solid-liquid dispersion system, thereby realizing a cross-flow filtration state. In this cross-flow filtration state, under the action of the pressure difference between the inside and outside of the filter core tube, the flow direction of the clear liquid in the solid-liquid dispersion system changes by nearly 90 degrees, and passes through the filter surface at an obtuse angle close to 90 degrees to the initial flow direction. At the same time, the mixed system flowing parallel to the filter surface is concentrated due to the loss of the clear liquid, so that the solid particles cannot accumulate on the filter surface, but continue to move forward along the original flow direction until they flow out of the filter core tube, thereby realizing continuous solid-liquid separation. Compared with the prior art, it greatly saves the thickening step, recovers a large amount of pressure energy and heat energy, and reduces the need for frequent backwashing of the thickening device.

[0031] Specifically, if Figure 1 As shown, the thickening device 100 of the high-pressure dispersion system includes: a closed shell 101, a multi-tube filter core 107, and a guide cone funnel 115. The interior of the closed shell 101 is divided into an upper section 104, a middle section 105, and a lower section 106 by an upper tube plate 102 and a lower tube plate 103 that are circumferentially sealed to the inner wall thereof. The middle section 105 is a part for realizing cross-flow filtration. The multi-tube filter core 107 is arranged in the middle section of the closed shell so that the mixed system flowing through the filter surface in parallel is concentrated due to the loss of clear liquid through cross-flow filtration, and the accumulation of solid particles on the filter surface is significantly reduced or even eliminated. Specifically, the multi-tube filter core 107 is actually a component, including a plurality of filter core tubes 108 and an upper tube plate 102 and a lower tube plate 103 assembled with the plurality of filter core tubes 108. It looks like each filter core tube runs through the upper tube plate 102 and the lower tube plate 103. The filter core tube 108 can be screwed into the prefabricated threaded hole-shaped inlet hole 112 and outlet hole 113 on the upper tube plate 102 and the lower tube plate 103 by threaded connection. Alternatively, it can also be directly welded together.

[0032] Figure 2A and 2B FIG. 1 is a schematic diagram showing the structure of a filter core tube in a thickening device according to an exemplary embodiment. Figure 2AAs shown, each filter core tube 108 has a permeable hole 109 transverse to the axial direction of the filter core tube 108. Although a tubular deep hole is shown here, it may not be a tubular hole, but a permeable mesh structure. For example, the filter core tube 108 is a ceramic tube. The tube wall of the ceramic tube has a pore structure that can play a role in penetrating liquid. This pore structure itself is not a straight tube structure, but a sponge-like pore structure. Therefore, during the process of infiltration from the inside to the outside, the liquid does not flow in the straight tube as shown in the figure, but seeps out from the inside to the outside from a random pore structure. For this reason, when the present application uses a ceramic tube as the filter core tube 108, a permeable membrane 128 will be attached to the ceramic tube. The predetermined angle between each permeable hole 109 and the direction of fluid flow can be 90 degrees, or it can be an obtuse angle slightly greater than 90, such as 91-95 degrees. By making the filtering direction and the fluid flow velocity direction form a predetermined angle, on the one hand, the mixed system filtered through the filtering surface loses clear liquid laterally due to the pressure difference, and on the other hand, does not affect the flow velocity of the mixed system, reducing the deposition of solid particles at the orifice of the penetration hole 109. Even if there is deposition, it will be carried away by the subsequent fluid impact. Therefore, the high-pressure dispersion system flows from the feed cavity 111 between the upper tube plate 102 and the feed port 110 arranged at the upper section 104 of the closed shell 101 through the inlet hole 112 located on the upper tube plate into the corresponding filter core tube 108 at a predetermined speed, and flows out from the outlet hole 113 of the corresponding filter core tube 108 located on the lower tube plate 103, so that part of the liquid (that is, the clear liquid) in the high-pressure dispersion system laterally penetrates into the clear liquid cavity 114 between the inner wall of the closed shell 101 and the outer wall of the multi-tube filter core 107 through the penetration hole 109.

[0033] By adopting this structure, the cross-flow filtration and the thickening process of the high-pressure dispersion system are realized. This process not only does not require the pressure relief of the high-pressure dispersion system, but also requires the use of the high pressure contained therein. Without the existence of such high pressure, there will be no pressure difference between the inside of the multi-tube filter element 107 and the clear liquid chamber 114 that is conducive to filtration, and it is difficult to achieve such cross-flow filtration. Therefore, the pressure energy in the high-pressure dispersion system is directly used to eliminate the pressure relief and cooling process in the treatment of industrial waste slag water, and the waste heat and waste energy in the existing industry are fully utilized as a treatment tool, which is an effective way to save energy, reduce consumption and achieve the current goal of carbon neutrality. In particular, it brings huge carbon trading economic profits to high-energy-consuming industries in the realization of carbon neutrality goals. It should be pointed out that the aperture of the permeable hole 109 is usually smaller than the average particle diameter of the solid particles in the high-pressure dispersion system, so as to prevent the solid particles from entering the clear liquid chamber with the liquid through the permeable hole 109. This is a conventional setting of the aperture in a filtration process, so it will not be repeated here.

[0034] In order to realize the cross-flow filtration using pressure difference, the pressure in the filter core tube 108 is 1-4 bar higher than the pressure in the clear liquid cavity. However, the pressure difference of 0-1 bar is also possible. Before the filtration starts, the high-pressure dispersion system is a pressurized or pressurized system. After filtration, it is divided into two streams, one of which is the dense phase flow inside the thickened multi-tube filter core 107, which is basically consistent with the inlet pressure; the other stream is the clear liquid in the clear liquid cavity 114. Because the clear liquid penetrates into the clear liquid cavity 114 through the tube wall of the multi-tube filter core 107, due to the need to overcome the filtration resistance, the pressure of the clear liquid cavity 114 is lower than the pressure of the dense phase flow of the solid-liquid mixed system inside the multi-tube filter core 107. Usually, the outlet pressure is controlled to be about 1 to 4 bar lower than the dense phase liquid, thereby forming a filtration pressure difference.

[0035] The cone bottom 116 of the guide cone funnel 115 arranged at the lower section 106 of the closed shell 101 is sealed and connected to the inner wall of the closed shell 101 and faces the outlet hole 113 of the filter core tube 107 on the lower tube plate 103, so as to receive the concentrated liquid 117 flowing out of the outlet hole. The lower opening diameter of the guide cone funnel 115 with such a hollow cone structure is small, which is convenient for collecting the concentrated liquid discharged from the lower part of the filter tube. The conical conical mouth increases the downward flow rate of the fluid, so that the solid particles in the discharged concentrated liquid are further separated under the action of gravity and initial velocity, and reach the bottom of the sedimentation tank as soon as possible without excessively stirring the thin liquid layer on the upper layer.

[0036] Therefore, optionally, although the above-mentioned cross-flow filtration can obtain the clear liquid and thickening result of the high-pressure dispersion system, this thickening result is also incomplete. Due to its rapid passage through the filter element tube 108, the preliminary thickened solid-liquid dispersion system entering the guide cone funnel 115 still contains a certain amount of liquid. To this end, the thickening device of the high-pressure dispersion system disclosed in the present invention also includes a receiving cone hopper 123 connected to the lower end of the closed shell 101, and a sedimentation tank 124 is formed between its inner wall and the outer wall of the guide cone funnel, so that the solids in the concentrated liquid sprayed from the cone end outlet of the guide cone funnel 115 are settled at the bottom of the sedimentation tank 124, and a thin liquid cavity 125 for accommodating a thin liquid layer is formed in the cavity between the outer wall of the guide cone funnel 115 and the lower section of the closed shell.

[0037] In addition, a weak liquid circulation hole 126 may be arranged at the lower section of the closed shell, the weak liquid circulation hole 126 is communicated with the weak liquid chamber 125 containing the weak liquid layer between the closed shell 101 and the outer wall of the guide cone funnel 115, and the weak liquid in the weak liquid chamber 125 is extracted via a weak liquid circulation valve connected thereto and arranged outside the closed shell 101. Optionally, extracting the weak liquid in the weak liquid chamber 125 through a weak liquid pump (not shown) connected to the weak liquid circulation valve can also promote the upward movement of the liquid in the concentrated liquid reaching the sedimentation tank under the suction of the weak liquid pump, and further enter the weak liquid layer, thereby promoting the sedimentation of solid particles.

[0038] Optionally, a dilute liquid injection port 127 is arranged at the upper section of the closed shell 101, so that the dilute liquid in the dilute liquid chamber is pumped to the dilute liquid injection port 127 via the dilute liquid circulation valve under the pumping of the dilute liquid pump, and then injected into the feed chamber to preliminarily dilute the high-pressure dispersion in the feed chamber. Through this preliminarily diluting, more dilute liquid is filtered into clear liquid during the cross-flow filtration process.

[0039] The clear liquid in the clear liquid chamber 114 is extracted through a clear liquid recovery hole 118 arranged at the upper part of the middle section 105 of the closed shell 101 and connected to the clear liquid chamber 114. The clear liquid recovery hole 118 is connected to a clear liquid recovery valve 119 arranged outside the closed shell to discharge the clear liquid. The extraction is usually performed by a clear liquid pump (not shown).

[0040] In order to further promote cross-flow filtration and prevent solid particles in the high-pressure dispersion from depositing and adhering to the orifice of the permeation hole 109, the technical solution disclosed in the present invention arranges a flow guide 120 at the inlet hole 112 of each upper tube plate 102. The flow guide 120 is a tubular component, and the diameter of the outlet end facing the inlet hole is 1 / 3 to 1 / 10 of the inner diameter of the filter core tube 108, and extends into the filter core tube for a predetermined length. The flow guide end facing the feed cavity forms a flanged annular plate, and the outer diameter of the annular plate is equal to the outer diameter of the filter core tube, or slightly larger. In actual use, the diameter of the filter core tube 108 is generally large, and the flow velocity in the tube is less than 1m / s. Because the inner diameter of the flow guide 120 is small, the inlet flow velocity of the flow guide 120 can reach 2 to 10m / s. On the one hand, a higher initial velocity is given to the inlet liquid-solid system. Therefore, by virtue of the high density and large inertia of the solid in the high-pressure dispersion system, the solid particles are thrown farther along the axial direction of the filter core, and even directly thrown to the end of the filter core tube 108 or its outlet. In this way, the solid concentration on the filter surface is reduced, providing convenient conditions for improving the filtration flux. On the other hand, after the high-pressure dispersion system is introduced into the filter core tube 108 by the flow guide 120, since the filter core tube 108 is filled with the high-pressure dispersion system, the newly introduced high-pressure dispersion system is mixed with the high-pressure dispersion system with a slower flow rate nearby at the outlet of the flow guide 120 (inside the filter core tube 108), producing a Venturi effect, that is, a relatively low-pressure area is generated at the center of the filter core tube 108 (the higher the flow rate, the lower the pressure), which can reduce the force of dragging some solid particles to the inner wall of the filter core tube 108, thereby reducing the solid particles attached to the filter surface. In addition, since the high-pressure dispersion system has an incompressible characteristic, the liquid in the center of the filter core tube 108 will not decrease, thereby reducing the tendency of solid particles generated by filtering the clear liquid to move to the filter surface. In this way, the cross-flow filtration effect is further promoted and the possibility of the permeation holes being blocked is reduced, thereby reducing the need for backwashing of the filter core tube 108.

[0041] In the actual mixed dispersion filtering process, the filter device must be reused, and backwashing is an indispensable process. However, the backwashing of conventional filtering devices requires stopping the machine for backwashing, which will inevitably affect the entire mixed dispersion filtering process. And this parking will also affect the arrangement of upstream and downstream processes. In order to avoid parking as much as possible or reduce the impact of parking, the present disclosure sets a middle partition 121 between the upper tube plate and the lower tube plate in parallel to the vertical arrangement direction of the multi-tube filter core 107, so that the edges of the middle partition 121 are sealed and connected to the inner wall of the closed shell, the lower surface of the upper tube plate and the upper surface of the lower tube plate, thereby dividing the clear liquid cavity 114 into two or more sub-clear liquid cavities. In this way, the multi-tube filter core 107 is divided into two or more groups of filter core tubes 108 by the middle partition 121, so that the middle partition 121 also divides the clear liquid cavity 114 into two or more sub-clear liquid cavities that are not connected to each other, and each sub-clear liquid cavity contains a group of filter core tubes 108. In this way, if there is a situation where backwashing is required, the filtering process of one group of filter core tubes 108 can be suspended and backwashing can be performed, while the filtering process of the other groups of filter core tubes 108 continues. By backwashing in this way in turn, the production impact caused by the overall shutdown can be significantly reduced.

[0042] In order to realize partial filtering of the core tube 108, backwashing holes 122 may be provided for different sub-clear liquid chambers. The backwashing hole 122 is arranged in the middle or lower part of the middle section of the closed shell 101, and is connected to the clear liquid chamber or the corresponding sub-clear liquid chamber, and backwashing liquid is injected into the clear liquid chamber or a selected sub-clear liquid chamber via a backwashing valve connected thereto and arranged outside the closed shell 101. Optionally, the backwashing liquid is the clear liquid outputted via the clear liquid recovery valve, or directly industrial tap water or other clean liquid.

[0043] Figure 3A and 3B FIG. 1 is a schematic diagram showing the structure of an upper tube plate in a thickening device according to an exemplary embodiment. Figure 3A and 3B As shown, the upper and lower tube sheets are upper and lower mounting steel plates used to fix the filter tube 108. The tube sheets are provided with the same number of holes as the filter tubes, and the holes are in the shape of a truncated cone. The large diameter of the truncated cone hole of the upper tube sheet faces downward, and the large diameter of the truncated cone hole of the lower tube sheet faces upward. The two ends of the filter tube are respectively embedded in the large diameter section of the truncated cone hole of the tube sheet. The outer diameter of the tube sheet is substantially consistent with the inner diameter of the closed shell 101.

[0044] This type of filter thickener can replace the sedimentation thickener, which can save the factory's scarce land resources for factories that need to thicken, reduce the dripping and bubbling phenomenon in the solid-liquid dispersion system treatment process, and no need to add drugs throughout the process (for example, adding flocculants and acid and alkali substances for adjusting the pH value. Commonly used flocculants in engineering projects include polyaluminum chloride, polyferric sulfate, polyacrylamide and other high-molecular organic compounds), reduce pollution to the recovered solvent / dispersant, and can recycle and utilize the pressure energy in the pressure solid-liquid dispersion system. Specifically, because the existing sedimentation thickener belongs to open-air operation, if it is necessary to treat a pressurized solid-liquid system, the solid-liquid system materials are usually sent directly into the sedimentation tank, and the kinetic energy in the system is completely wasted, and the recovered clean water needs to be pressurized by a water pump before it can be returned to the system. However, because the filtration pressure difference of the present disclosure is only 1 to 4 bar, the recovered clean water itself already has a certain pressure, and it can be returned to the system as long as it is properly pressurized. For example, the existing coal chemical industry solid wastewater has an initial pressure of 65 bar. After the concentrated and recycled water, its pressure is zero and needs to be re-pressurized to 87 bar before returning to the system. The actual pressure loss is 65 bar. If the present disclosure is adopted, the residual pressure of the recycled water is still 61-64 bar. As long as the pressure is increased by 13-16 bar by a pump, the system reuse requirements can be met. Therefore, the pressure energy required for the return system is greatly saved. This provides technical support for the realization of green concentration.

[0045] The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structures, configurations or implementations described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent configurations included in the spirit and scope of the appended claims.

Claims

1. A thickening device for a high-pressure dispersion system, characterized in that: include: A closed shell, the interior of which is divided into an upper section, a middle section and a lower section by an upper tube sheet and a lower tube sheet circumferentially sealed to the inner wall thereof; A multi-tube filter element is arranged at the middle section of the closed shell, comprising a plurality of filter core tubes, each filter core tube penetrating the upper tube plate and the lower tube plate, and having a transverse penetration hole in the axial direction of the filter core tube, a high-pressure dispersion system flows from the feed cavity between the upper tube plate and the feed port arranged at the upper section of the closed shell through the inlet hole located at the upper tube plate into the corresponding filter core tube at a predetermined speed, and flows out from the corresponding outlet hole located at the lower tube plate, so that part of the liquid in the high-pressure dispersion system penetrates transversely into the clear liquid cavity between the inner wall of the closed shell and the outer wall of the multi-tube filter element through the penetration hole; A guide cone funnel is arranged at the lower section of the closed shell, the cone bottom of which is sealed with the inner wall of the closed shell and faces the outlet hole of the filter core tube on the lower tube plate, so as to receive the concentrated liquid flowing out of the outlet hole; and The clear liquid recovery hole is arranged at the upper part of the middle section of the closed shell, communicated with the clear liquid cavity, and extracts the clear liquid in the clear liquid cavity through a clear liquid recovery valve connected thereto and arranged outside the closed shell.

2. The thickening device of the high pressure dispersion system according to claim 1, characterized in that It also includes: a flow guide arranged at the inlet hole of each upper tube plate, the flow guide is a tubular component, the diameter of the outlet end facing the inlet hole is 1 / 3 to 1 / 10 of the inner diameter of the filter core tube, and extends into the filter core tube for a predetermined length, and the flow guide end facing the feed chamber is formed with a flanged annular plate, and the outer diameter of the annular plate is equal to or greater than the outer diameter of the filter core tube.

3. The thickening device of the high pressure dispersion system according to claim 1, characterized in that It also includes: a middle partition plate, which is arranged between the upper tube plate and the lower tube plate in parallel with the vertical arrangement direction of the multi-tube filter element, and the edges around it are sealed and connected to the inner wall of the closed shell, the lower surface of the upper tube plate and the upper surface of the lower tube plate, so as to divide the clear liquid chamber into two or more sub-clear liquid chambers.

4. The thickening device of the high pressure dispersion system according to claim 1, characterized in that The penetration hole is a pore structure in the filter core tube, and the inlet hole of the upper tube plate is in the shape of an inverted truncated cone.

5. The thickening device of the high pressure dispersion system according to claim 4, characterized in that It also includes a backwash hole, which is arranged in the middle or lower part of the middle section of the closed shell and is connected to the clear liquid chamber. Backwash liquid is injected into the clear liquid chamber or a selected sub-clear liquid chamber via a backwash valve connected to it and arranged outside the closed shell.

6. The thickening device of the high pressure dispersion system according to claim 5, characterized in that The backwash liquid is the clear liquid output through the clear liquid recovery valve.

7. The thickening device of the high pressure dispersion system according to claim 1, characterized in that The pressure in the filter core tube is no higher than the pressure in the clear liquid chamber by no more than 4 bar.

8. The thickening device of the high pressure dispersion system according to any one of claims 1 to 7, characterized in that It also includes a receiving cone hopper connected to the end of the lower section of the closed shell, and a sedimentation tank is formed between the inner wall of the receiving cone hopper and the outer wall of the guiding cone funnel, so that the solids in the concentrated liquid sprayed from the cone end outlet of the guiding cone funnel are settled at the bottom of the sedimentation tank, and a dilute liquid cavity for accommodating the dilute liquid layer is formed in the cavity between the outer wall of the guiding cone funnel and the lower section of the closed shell.

9. The thickening device of the high pressure dispersion system according to claim 8, characterized in that It also includes a circulation hole, which is arranged at the lower section of the closed shell and communicates with a dilute liquid chamber containing a dilute liquid layer between the closed shell and the outer wall of the guide cone funnel, and extracts the dilute liquid in the dilute liquid chamber via a dilute liquid circulation valve connected thereto and arranged outside the closed shell.

10. The thickening device of the high pressure dispersion system according to claim 9, characterized in that The invention also comprises a dilute liquid injection port arranged at the upper section of the closed shell, and the dilute liquid in the dilute liquid chamber is pumped to the dilute liquid injection port via a dilute liquid recovery valve by a dilute liquid pump, and then is injected into the feed chamber to preliminarily dilute the high-pressure dispersion system in the feed chamber.

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