Novel residual-liquid-free filter

Abstract

The utility model relates to the technical field of raffinate-free filters, and discloses novel raffinate-free filter equipment which consists of an upper sealing head, a barrel body and a lower conical barrel, the upper sealing head is provided with a filtrate outlet and a residual liquid outlet; a tube plate A-A and a pore plate B-B are arranged at the upper end of the barrel, a plurality of filter elements are arranged in the barrel, outlets of the filter elements are embedded in the pore plate B-B, a plurality of liquid discharge tubes are arranged in the filter elements, and outlets of the liquid discharge tubes are embedded in the tube plate A-A; the lower conical cylinder is conical and is provided with a filter cake outlet, the outer side of the lower conical cylinder is provided with residual liquid discharge ports at different heights, the inner side wall of the lower conical cylinder is provided with a sintering filter screen, the residual liquid of the lower conical cylinder is filtered, the residual liquid in the filter is reduced to the minimum limit, the loss of the liquid is reduced, the cost of the product is reduced, and the yield of the product is improved.

Description

Technical Field

[0001] The utility model patent belongs to the field of filters, and specifically relates to a filter without residual liquid. Background Art

[0002] Existing filters use metal filter elements or non-metal filter elements. After filtration, residual liquid is generally left inside the filter element and at the bottom of the filter. The filter cake has a high moisture content, making it difficult to clean the filter cake, and the residual liquid is difficult to recycle, which leads to post-processing difficulties and serious waste. Utility Model Content

[0003] The technical problem to be solved by this utility model patent is to provide a new type of filter without residual liquid, which solves the problem of residual liquid in the actual production process, thereby reducing the residual liquid after filtration to a minimum, making the filter cake dry and easy to clean, and improving the yield of the target product in the filtrate.

[0004] A novel filter without residual liquid, consisting of an upper head, a cylinder and a lower cone, and also including a drain pipe, a sintered filter screen and a filter element; the upper head is provided with a filtrate outlet and a residual liquid outlet; the upper end of the cylinder is provided with a tube sheet AA and a perforated plate BB, a plurality of filter elements are provided inside the cylinder, a plurality of drain pipes are provided inside the filter element, the drain pipes pass through the perforated plate BB, and the thin tube openings are embedded in the tube sheet AA; the lower cone is conical, the lower cone is provided with a filter cake outlet, and residual liquid outlets are provided at different heights on the outside of the lower cone, and a sintered filter screen is provided on the inner side wall of the conical lower cone to filter the residual liquid in the lower cone so that the residual liquid is discharged from the residual liquid outlet.

[0005] The operation steps of the residual liquid filter are as follows:

[0006] 1) The feed liquid is imported from N1, filtered through the filter element, and the filtrate enters the upper head. A large amount of filtrate is discharged from the N2 port;

[0007] 2) Then open the N3 nitrogen inlet and the N5 residual liquid outlet, and discharge most of the liquid in the filter cavity and the residual liquid in the filter element from the residual liquid outlet N5;

[0008] 3) When the liquid level is lower than the bottom of the filter element, close the N5 and N2 ports, open the N6 residual liquid port, and allow the residual liquid to pass through the sintered filter and be discharged from the N6 port;

[0009] 4) When the liquid level is lower than the N6 port, close the N6 port and open the N7 residual liquid port to allow the residual liquid to be filtered through the sintering filter and then discharged from N7;

[0010] 5) When the liquid level is lower than the N7 port, close the N7 port and open the N8 residual liquid port, so that the residual liquid is filtered through the sintering filter and then discharged from the N8 port;

[0011] 6) Then, after nitrogen purge for 5-15 minutes, close the N8 port;

[0012] 7) If necessary, repeat steps 1 to 5 if washing is required. Finally, open the N4 filter cake outlet to discharge the filter cake.

[0013] Preferably, the filter element has a diameter of 2-10 cm and a filtration accuracy of 0.1-100 μm; the drain pipe in the filter element extends upward through the orifice plate BB, the capillary outlet is fixed on the tube plate AA, and the residual liquid in the capillary is discharged from the residual liquid outlet.

[0014] Preferably, the filter lower cone has a sintered filter screen on its conical side wall, and the filtrate passes through the sintered filter screen and flows out from the interlayer between the cone and the sintered filter screen through the collecting port, thereby filtering the residual liquid at the bottom.

[0015] Preferably, the upper head is connected to the cylinder body by a flange, and the upper head portion above the flange is detachable; the lower cone is connected to the cylinder body by a flange, and the cone portion below the flange is detachable.

[0016] Preferably, a jacket is provided on the outer side of the cylinder body and the lower cone of the filter, and a heating or cooling medium can be passed into the jacket.

[0017] Preferably, the entire space of the filter is sealed, and a pressure gauge is provided on the upper head of the filter.

[0018] Preferably, the filter material is one of PVC, carbon steel, stainless steel, steel-lined PE, steel-lined PP, steel-lined PTFE, steel internal sprayed resin or titanium; the material of the sintered filter is metal, specifically one of stainless steel or titanium; the filter element material is metal or non-metal, the metal material is specifically one of stainless steel 304, stainless steel 316L or titanium; the non-metal material is specifically one of PP, PTFE, PVDF, nylon, polyester; the filter element is in the form of a metal sintered filter element, a PTFE sintered filter element, a PP or PVDF membrane folded filter element, a perforated tube sleeve metal wire mesh or a filter cloth.

[0019] In summary, this patent has the following beneficial effects:

[0020] 1) The interior of the no-residue filter is a closed space, which is suitable for filtering, separating and recovering liquids that cannot be exposed to the air, liquids with low boiling points and volatile substances;

[0021] 2) During the filtration process, nitrogen is introduced to control the pressure in the filter through the pressure gauge P set on the upper head, forming a positive pressure in the filter, which will accelerate the pressure to press the material out of the filter;

[0022] 3) By setting a drain pipe inside the filter element and close to the filter element wall, the positive pressure in the filter is used to drain the residual liquid at the bottom of the filter element. In traditional equipment, this part of the filtrate and the filter cake cannot be effectively separated, resulting in losses;

[0023] 4) A sintered filter screen is arranged on the conical side wall of the lower cone of the filter to filter the residual liquid at the bottom; at the same time, residual liquid discharge ports of different heights are arranged, and the residual amount of the internal liquid can be determined by using multiple discharge ports;

[0024] 5) The solid-liquid separation is performed by the residual liquid-free filter of the present application, and the separation effect is significantly improved compared with the traditional process, and the efficiency can be improved, the environment can be optimized, and manual operation can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the utility model non-residual liquid filter;

[0026] Figure 2 It is a top view of the residual liquid-free filter of the utility model;

[0027] Figure 3 It is a top view of the AA section of the tube sheet of the utility model;

[0028] Figure 4 It is a top view of the BB section of the orifice plate of the present invention.

[0029] The attached drawings are marked as follows: 1. Upper head; 2. Drain pipe; 3. Cylinder; 4. Sintered filter screen; 5. Lower cone; 6. Filter element; N1. Feed liquid inlet; N2. Filtrate outlet; N3. Nitrogen inlet; N4. Filter cake outlet; N5. Residual liquid outlet; N6. Residual liquid outlet; N7. Residual liquid outlet; N8. Residual liquid outlet; P. Pressure gauge port. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0031] A novel filter without residual liquid, consisting of an upper end cap 1, a cylinder 3 and a lower cone 5, characterized in that it also includes a drain pipe 2, a sintered filter screen 4 and a filter element 6; the upper end cap is provided with a filtrate outlet N2 and a residual liquid outlet N5; a tube sheet AA and a perforated plate BB are provided at the upper end of the cylinder, a plurality of filter elements 6 are provided inside the cylinder, a plurality of drain pipes 2 are provided inside the filter element 6, the drain pipes 2 pass through the perforated plate BB, and the filter element outlet is embedded in the tube sheet AA; the lower cone is conical, the lower cone is provided with a filter cake outlet N4, and residual liquid outlets N6, N7, and N8 are provided at different heights on the outer side of the lower cone, and a sintered filter screen is provided on the inner side wall of the conical lower cone to filter the residual liquid in the lower cone so that the residual liquid is discharged from the residual liquid outlet.

[0032] The filtration steps of a new type of residual liquid filter are as follows:

[0033] 1) The feed liquid is imported from N1, filtered through filter element 6, and the filtrate enters the upper head. A large amount of filtrate is discharged from the N2 port;

[0034] 2) Then open the N3 nitrogen inlet and the N5 residual liquid outlet, and discharge most of the liquid in the filter cavity and the residual liquid in the filter element 6 from the residual liquid outlet N5;

[0035] 3) When the liquid level is lower than the bottom of the filter element 6, close the N5 and N2 ports, open the N6 residual liquid port, and allow the residual liquid to pass through the sintered filter 4 and be discharged from the N6 port;

[0036] 4) When the liquid level is lower than the N6 port, close the N6 port and open the N7 residual liquid port, so that the residual liquid is filtered through the sintering filter 4 and then discharged from N7;

[0037] 5) When the liquid level is lower than the N7 port, close the N7 port and open the N8 residual liquid port, so that the residual liquid is filtered through the sintering filter 4 and then discharged from the N8 port;

[0038] 6) Then, after nitrogen purge for 5-15 minutes, close the N8 port;

[0039] 7) If necessary, repeat steps 1 to 5 if washing is required. Finally, open the N4 filter cake outlet to discharge the filter cake.

[0040] Example 1

[0041] Taking the separation and recovery process of the catalyst as an example, the mixed slurry containing 3,4-dihydroxy-1-butene, water and catalyst is pumped into the residual liquid filter, fed from the N1 port, filtered through the filter element, enters the upper head, and the clear liquid is filtered out from the N2 port. After the filtration is completed, the N2 port is closed;

[0042] Then, open the N3 nitrogen inlet and the N5 residual liquid outlet, and transport the liquid in the filter cavity and the residual liquid in the filter element to the N5 outlet through the drain pipe for discharge;

[0043] When the liquid level is lower than the bottom of the filter element, close the N5 port and open the N6 residual liquid port to allow the residual liquid to be filtered through the sintered filter and discharged from the N6 port;

[0044] When the liquid level is lower than the N6 port, close the N6 port, open the N7 residual liquid port, filter the residual liquid through the sintering filter, and discharge it through the N7 port;

[0045] When the liquid level is lower than the N7 port, close the N7 port and open the N8 residual liquid port, so that the residual liquid is filtered through the sintering filter and then discharged from the N8 port;

[0046] Keep nitrogen purging for 5-15 minutes, then close N5, N6, N7, and N8 ports;

[0047] Use water to wash and repeat steps 1-5. When the residual liquid is drained, open the N4 outlet and discharge the catalyst filter cake. Since no residual liquid is retained, a catalyst filter cake with low moisture content is obtained.

[0048] Example 2

[0049] Taking the separation and recovery process of activated carbon as an example, after the dichloromethane solution of vinyl sulfate is decolorized by activated carbon, the mixture of organic phase and activated carbon enters the filter, is fed from the N1 port, filtered through the filter element, enters the upper head, and the filtered clear liquid is discharged from the N2 port, and the N2 port is closed;

[0050] Then, open the N3 nitrogen inlet and the N5 residual liquid outlet, and discharge most of the liquid in the filter cavity and the residual liquid in the filter element through the drain pipe to the N5 outlet;

[0051] When the liquid level is lower than the bottom of the filter element, close the N5 port and open the N6 residual liquid port to allow the residual liquid to be filtered through the sintered filter and discharged from the N6 port;

[0052] When the liquid level is lower than the N6 port, close the N6 port, open the N7 residual liquid port, filter the residual liquid through the sintering filter, and discharge it through the N7 port;

[0053] When the liquid level is lower than the N7 port, close the N7 port and open the N8 residual liquid port, so that the residual liquid is filtered through the sintering filter and then discharged from the N8 port;

[0054] Keep nitrogen purging for 5-15 minutes, then close the N8 port;

[0055] Use solvent dichloromethane to wash, and repeat steps 1-5. When the residual liquid is drained, open the N4 outlet to discharge the activated carbon filter cake. Since there is no residual liquid left, the activated carbon with low moisture content is recovered, and the product loss is small.

[0056] Example 3

[0057] Taking the separation and recovery process of molecular sieve as an example, after the prepared organic phase containing molecular sieve, dimethyl carbonate and propargyl methyl carbonate is dehydrated by molecular sieve, the mixture of organic phase and molecular sieve enters the filter, is fed from the N1 port, filtered through the filter element, enters the upper head, and the filtered clear liquid is discharged from the N2 port, and the N2 port is closed;

[0058] Then, open the N3 nitrogen inlet and the N5 residual liquid outlet, and transport the liquid in the filter cavity and the residual liquid in the filter element to the N5 outlet through the drain pipe for discharge;

[0059] When the liquid level is lower than the bottom of the filter element, close the N5 port and open the N6 residual liquid port to allow the residual liquid to be filtered through the sintered filter and discharged from the N6 port;

[0060] When the liquid level is lower than the N6 port, close the N6 port, open the N7 residual liquid port, filter the residual liquid through the sintering filter, and discharge it through the N7 port;

[0061] When the liquid level is lower than the N7 port, close the N7 port and open the N8 residual liquid port, so that the residual liquid is filtered through the sintering filter and then discharged from the N8 port;

[0062] Keep nitrogen purging for 5-15 minutes, then close the N8 port;

[0063] Use dimethyl carbonate for washing, repeat steps 1-5, and when the residual liquid is drained, open the N4 outlet to discharge the filter cake of the molecular sieve. Since no residual liquid is retained, a molecular sieve with low moisture content is obtained with high yield.

[0064] In summary, the utility model provides a new type of residual liquid filter, which solves the problem of residual liquid in the actual production process. No residual liquid is achieved after filtration, the filter cake has low moisture content and is easy to clean, which reduces material loss and improves the yield of the target product in the filtrate.

[0065] The specific embodiments of the utility model are merely explanations of the patent, and are not limitations of the patent. After reading this specification, those skilled in the art may make modifications to the embodiments without creative contributions as needed. However, as long as they are within the scope of the claims of the patent, they are protected by the patent law.

Claims

1. A novel residual liquid-free filter, comprising an upper end cap (1), a cylinder (3) and a lower cone (5), characterized in that: It also comprises a drainage pipe (2), a sintered filter screen (4) and a filter element (6); the upper end cap is provided with a filtrate outlet (N2) and a residual liquid outlet (N5); the upper end of the cylinder is provided with a tube sheet AA and a perforated plate BB; a plurality of filter elements (6) are provided inside the cylinder; a plurality of drainage pipes (2) are provided inside the filter element (6); the drainage pipes (2) pass through the perforated plate BB, and the thin tube openings are embedded in the tube sheet AA; the lower cone is conical, the lower cone is provided with a filter cake outlet (N4), and residual liquid outlets (N6, N7, N8) are provided at different heights on the outer side of the lower cone; the inner side wall of the conical lower cone is provided with a sintered filter screen to filter the residual liquid in the lower cone so that the residual liquid is discharged from the residual liquid outlet.

2. A novel non-residue liquid filter according to claim 1, characterized in that: The filter element (6) has a diameter of 2-10 cm and a filtering accuracy of 0.1-100 μm. The liquid discharge pipe (2) in the filter element (6) extends upward through the orifice plate BB, the capillary outlet is fixed on the tube plate AA, and the residual liquid in the capillary is discharged through the residual liquid discharge port (N5).

3. According to the novel residual liquid filter described in claim 1, it is characterized in that: The filter lower cone (5) has a sintered filter screen (4) disposed on the conical side wall. The filtrate passes through the sintered filter screen (4) and flows out from the interlayer between the cone and the sintered filter screen (4) through the collecting port, thereby achieving the purpose of filtering the residual liquid at the bottom.

4. A novel residual liquid free filter according to claim 1 or 2, characterized in that: The upper head (1) and the cylinder (3) are connected by a flange, and the portion of the upper head (1) above the flange is detachable; the lower cone (5) and the cylinder (3) are connected by a flange, and the cone portion of the cylinder below the flange is detachable.

5. According to the novel residual liquid filter of claim 3, it is characterized in that: The outer sides of the cylinder (3) and the lower cone (5) of the filter are provided with a jacket, and a medium that can be heated or cooled flows through the jacket.

6. According to the novel non-residue liquid filter of claim 1, it is characterized by: The entire space of the filter is sealed, and a pressure gauge (P) is provided on the upper head (1) of the filter.

7. According to the novel non-residue liquid filter of claim 2, it is characterized by: The filter material is one of PVC, carbon steel, stainless steel, steel-lined PE, steel-lined PP, steel-lined PTFE, steel internal sprayed resin or titanium; the sintered filter (4) is made of metal, specifically one of stainless steel or titanium; the filter element (6) is made of metal or non-metal, specifically one of stainless steel 304, stainless steel 316L or titanium; the non-metal material is specifically one of PP, PTFE, PVDF, nylon and polyester; the filter element (6) is in the form of a metal sintered filter element, a PTFE sintered filter element, a PP or PVDF membrane folded filter element, a perforated tube sleeve metal wire mesh or a filter cloth.

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