Tubular deaerator

Abstract

The invention provides a tubular deaerator, and relates to the field of liquid deaeration equipment, the tubular deaerator comprises stock solution pipes, a deaeration filter pipe, a deaerator jacket and a vacuum pipeline, the two ends of the deaeration filter pipe are respectively communicated with the stock solution pipes to form a channel for circulating liquid to be deaerated, and the side wall of the deaeration filter pipe is provided with a plurality of filter holes for bubbles to pass through. And the de-foaming device jacket is sleeved on the outer wall of the de-foaming filter tube. Defoaming of the stock solution can be completed in the pipeline conveying process, extra staying and waiting are not needed, the continuous production requirements of chemical enterprises are perfectly met, and the production efficiency is greatly improved. A special defoaming kettle does not need to be built, equipment is integrated in a stock solution conveying pipeline system, the structure is compact, the problem that a traditional defoaming mode occupies a large space is thoroughly solved, and the plant layout cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of liquid defoaming equipment, in particular to a tubular defoamer. BACKGROUND

[0002] The conventional primary liquid defoaming method is generally flat plate flow defoaming or in-kettle standing defoaming. When a chemical enterprise carries out continuous production, flat plate flow defoaming needs to occupy space to store a defoaming kettle, and meanwhile needs to maintain the speed balance between the liquid level in the defoaming kettle and the incoming primary liquid, and the degree of automation is not high. In-kettle standing defoaming also needs to select a defoaming kettle, occupies a large space, and in-kettle standing defoaming cannot be used for continuous defoaming.

[0003] Therefore, there is an urgent need in the prior art for a primary liquid defoaming device which can conveniently carry out continuous defoaming and occupies a small space. SUMMARY

[0004] The present application provides a tubular defoamer to solve the problem of inability to continuously defoam and large space occupation in the prior art.

[0005] The present application provides a tubular defoamer, comprising a primary liquid pipe, a defoaming filter pipe, a defoamer jacket, and a vacuum pipeline. Both ends of the defoaming filter pipe are communicated with the primary liquid pipe, forming a channel for circulating the liquid to be defoamed. The defoamer jacket is sleeved on the outer wall of the defoaming filter pipe, and a vacuum cavity is arranged between the defoamer jacket and the defoaming filter pipe. The vacuum pipeline is connected to the defoamer jacket and communicated with the vacuum cavity, and is used for connecting a vacuum device.

[0006] Further, a vacuum pump is connected to one end of the vacuum pipeline away from the defoamer jacket, and a vacuum valve is connected to the vacuum pipeline.

[0007] Further, the viscosity of the liquid to be defoamed is 1000 cP to 1000000 cP.

[0008] Further, the defoaming filter pipe comprises a pipe wall and a connecting head fixedly connected to both ends of the pipe wall, the connecting head is used for connecting the primary liquid pipe, the pipe wall is composed of a plurality of filter pipes with parallel axes, adjacent two filter pipes are mutually fitted, a plurality of filter holes are arranged on the side wall of the filter pipe, and the diameter of the filter hole is 1 to 100 microns.

[0009] Further, the diameter of the filter pipe is 1 to 5 mm.

[0010] Further, the cross section of the pipe wall is circular or polygonal.

[0011] Further, the filter pipe comprises a spiral spring and a support rod inserted into the spiral spring.

[0012] Furthermore, the diameter of the spring wire of the helical spring is 0.2~1mm, and the pitch gap of the helical spring is less than 0.05mm.

[0013] Furthermore, an electric heater is connected to the outer wall of the raw liquid tube.

[0014] The beneficial effects of this invention are as follows: 1. Achieve continuous degassing: Overcoming the limitations of traditional flat-plate flow degassing and in-vessel static degassing, which cannot operate continuously, the raw liquid can be degassed during pipeline transportation without additional waiting time, perfectly meeting the continuous production needs of chemical enterprises and greatly improving production efficiency.

[0015] 2. Significantly saves space: No need to build a dedicated degassing tank. The equipment is integrated into the raw liquid delivery pipeline system, with a compact structure, which completely solves the problem of large space occupation by traditional degassing methods and reduces plant layout costs.

[0016] 3. The degassing filter tube can adopt an irregular cross-section design to increase the contact area between the raw liquid and the filter structure; combined with the raw liquid tube heating device, it can reduce the apparent viscosity of the raw liquid, accelerate the escape of bubbles, and improve the degassing efficiency.

[0017] 4. The degassing filter tube is constructed from multiple layers of parallel filter tubes bonded together, or from a combination of helical springs and support rods, forming a stable overall load-bearing structure. This provides strong resistance to negative pressure deformation and the impact of antigen liquid pressure, avoiding the problems of single-layer filter element collapse and damage, and extending the equipment's service life. Furthermore, the size of the filter holes can be adjusted by regulating the injection pressure of the liquid to be degassed.

[0018] 5. Multiple tubular deaerators can be connected in parallel using a three-way valve, which not only improves deaeration efficiency, but also allows switching to other equipment to continue operation when a single device reaches its replacement cycle, achieving disassembly and cleaning replacement without stopping the machine and reducing production interruption time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the connection relationship of the electric heater in an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the parallel structure of the two-tube deaerator according to an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the pipe wall structure with three different cross-sections according to the present invention.

[0023] Figure 5 This is a schematic diagram of the structure of the defoaming filter tube according to an embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of the structural relationship of the filter tube in an embodiment of the present invention.

[0025] Figure label: 1. Raw liquid pipe; 2. Deaerator filter pipe; 21. Pipe wall; 22. Connector; 23. Support frame; 3. Deaerator jacket; 31. Vacuum chamber; 4. Vacuum pipe; 41. Vacuum valve; 5. Filter pipe; 51. Helical spring; 52. Support rod; 6. Electric heater; 7. Three-way valve. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0027] The terms "first" and "second" in the specification and claims of this invention may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0029] The following is combined with Figures 1-6The tubular deaerator of the present invention includes a raw liquid tube 1, a deaerator filter tube 2, a deaerator jacket 3, and a vacuum pipe 4. The two ends of the deaerator filter tube 2 are respectively connected to the raw liquid tube 1, forming a channel for the flow of the liquid to be deaerated. The side wall of the deaerator filter tube 2 has multiple filter holes for air bubbles to pass through. The deaerator jacket 3 is fitted onto the outer wall of the deaerator filter tube 2, and a vacuum chamber 31 is provided between the jacket and the filter tube 2. The vacuum pipe 4 is connected to the deaerator jacket 3 and communicates with the vacuum chamber 31, for connecting a vacuum pumping device.

[0030] Specifically, such as Figure 1 As shown, the raw liquid pipe 1 has two sections, and each end of the degassing filter pipe 2 is connected to a section of the raw liquid pipe 1, thus forming a channel for the flow of the liquid to be degassed. The liquid to be degassed enters from the raw liquid pipe 1 at one end of the tubular degasser, passes through the degassing filter pipe 2, and flows out from the raw liquid pipe 1 at the other end. During the flow of the liquid to be degassed, a vacuum pumping device is connected to the vacuum pipe 4, and a vacuum is drawn into the vacuum chamber 31. The gas in the liquid to be degassed passes through the filter holes of the degassing filter pipe 2 into the vacuum chamber 31, and is then extracted through the vacuum pipe 4, realizing continuous degassing of the liquid during the flow of the liquid in the pipe.

[0031] Specifically, the viscosity of the liquid to be degassed is between 1000 cP and 1000000 cP, and the type of liquid to be degassed is not limited; it can be spinning solution, paint, melt, solution, etc.

[0032] Furthermore, a vacuum pump (not shown in the figure) is connected to the end of the vacuum pipe 4 away from the deaerator jacket 3, and a vacuum valve 41 is connected to the vacuum pipe 4.

[0033] Specifically, such as Figure 1 As shown, a vacuum pump is connected to the end of the vacuum pipeline 4 away from the deaerator jacket 3 as a vacuum pumping device. A vacuum valve 41 is connected to the vacuum pipeline 4. During the deaeration operation, the vacuum valve 41 is opened and the vacuum pump is started, and the gas in the liquid is successfully extracted. When deaeration is stopped or the equipment is disassembled and cleaned, the vacuum valve 41 is closed to prevent external gas from entering the vacuum chamber 31 and the deaeration channel, avoid contaminating the original liquid, and ensure the airtightness of the deaeration system.

[0034] Furthermore, the defoaming filter tube 2 includes a tube wall 21 and connectors 22 fixedly connected to both ends of the tube wall 21. The connectors 22 are used to connect the original liquid tube 1. The tube wall 21 is composed of multiple filter tubes 5 with parallel axes. Adjacent filter tubes 5 are fitted together. Multiple filter holes are opened on the side wall of the filter tube 5. The diameter of the filter holes is 1~100μm.

[0035] Furthermore, the diameter of the filter tube 5 is 1~5mm.

[0036] Specifically, such as Figure 1As shown in Figure 5, the degassing filter tube 2 includes a tube wall 21 and connectors 22 at both ends. The tube wall 21 is composed of multiple filter tubes 5 with parallel axes. Adjacent filter tubes 5 are bonded together. The tube wall 21 of the degassing filter tube 2 is formed by multiple layers of filter tubes 5 distributed circumferentially and stacked radially. The diameter of the filter holes ranges from 1 to 100 μm. The tube wall 21 can be made of stainless steel. For corrosive raw liquids, a corrosion-resistant material can be selected accordingly. When the liquid to be degassed is passed into the degassing filter tube 2, bubbles enter the vacuum chamber 31 through the filter holes under the negative pressure of the vacuum chamber 31 and are then extracted through the vacuum pipe 4, achieving gas-liquid separation. The radially multi-layered filter tubes 5 support and bond with each other to form an integral stress-bearing structure. Compared with single-layer thin-walled filter elements, it has a stronger ability to resist negative pressure deformation and pressure impact of raw liquid. Especially when dealing with raw liquids transported under high pressure or in high-vacuum degassing scenarios, the multi-layered structure can prevent the tube wall 21 from collapsing or deforming, ensuring long-term stable operation of the equipment and extending its service life. The radially stacked structure of the multi-layer filter tubes 5 forms a "multi-layer sealing barrier," with the micropores of each layer of filter tubes 5 serving to block the raw liquid while allowing gas to pass through. Even if a small number of micropores in one layer of filter tubes 5 become blocked or damaged, the remaining layers can still ensure the sealing effect, effectively reducing the probability of raw liquid leakage. This solves the problem of leakage directly caused by the damage of a single filter element, and improves the reliability of equipment operation.

[0037] Furthermore, the cross-section of the pipe wall 21 is set to be circular or polygonal.

[0038] Specifically, such as Figure 4 As shown, since the wall 21 of the degassing filter tube 2 is composed of multiple layers of filter tubes 5 arranged radially, the cross-sectional shape of the wall 21 can be adjusted by adjusting the arrangement of the filter tubes 5. The cross-section of the wall 21 is generally circular. For raw liquids that are difficult to degas, an irregular cross-section can be used to increase the contact area between the liquid to be degassed and the filter tube 5, which is more conducive to the escape of gas in the liquid to be degassed.

[0039] Furthermore, the filter tube 5 includes a helical spring 51 and a support rod 52 inserted into the helical spring 51.

[0040] Furthermore, the diameter of the spring wire of the helical spring 51 is 0.2~1mm, and the pitch gap of the helical spring 51 is less than 0.05mm.

[0041] Specifically, such as Figure 6As shown, each filter tube 5 consists of a helical spring 51 and a support rod 52. The two ends of the helical spring 51 and the support rod 52 are fixedly connected to the connector 22. The support rod 52 is inserted into the helical spring 51, providing support and preventing excessive deformation of the filter tube 5 under negative pressure and liquid pressure. The pitch gap of the helical spring 51 is the gap between two adjacent turns of the spring wire, serving as the filter hole for air bubbles in the liquid to be degassed to pass through. When using the tubular deaerator, the liquid to be degassed passes through the filter tube 5. As the pressure difference between the inside and outside of the filter tube 5 gradually increases, the air bubbles in the liquid to be degassed move towards the vacuum chamber 31, while the liquid to be degassed exerts a thrust on the tube wall 21 of the filter tube 5, causing the filter tube 5 to bulge and deform towards the vacuum chamber 31, thus increasing the pitch gap of the helical spring 51. Specifically, the pitch gap of the helical spring 51 can be adjusted by regulating the injection pressure of the liquid to be degassed to meet the continuous degasing requirements of liquids with different viscosities.

[0042] In some specific embodiments, such as Figure 5 As shown, the degassing filter tube 2 also includes a support mesh frame 23. The two ends of the support mesh frame 23 are fixed to the connector 22 respectively. The support mesh frame 23 is set as a cylindrical structure. The support mesh frame 23 fits the tube wall 21 inside it, which improves the protection effect of the tube wall 21.

[0043] Furthermore, an electric heater 6 is connected to the outer wall of the raw liquid pipe 1.

[0044] Specifically, such as Figure 2 As shown, an electric heater 6 is connected to the outer wall of the raw liquid pipe 1. The heater heats the raw liquid pipe 1, thereby increasing the temperature of the liquid to be degassed flowing through the raw liquid pipe 1, which in turn increases the fluidity of the liquid to be degassed, accelerates the escape rate of bubbles, and improves the degassed efficiency. The electric heater 6 can be configured as a jacketed heating pipe or an electric heat tracing pipe.

[0045] In some specific embodiments, multiple tubular deaerators can be connected in parallel to achieve simultaneous deaeration, thereby improving deaeration efficiency.

[0046] Specifically, such as Figure 3 As shown, two tubular deaerators are connected in parallel via a three-way valve 7, enabling simultaneous deaeration of both tubular deaerators, improving deaeration efficiency while facilitating disassembly, cleaning, and replacement.

[0047] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the entire UAV engine starting method of this application will be described in detail below with reference to specific embodiments 1-4.

[0048] Example 1: A polyamic acid spinning solution with an apparent viscosity of 1,000,000 cP at room temperature was selected as the degassing liquid. Degassing was performed using a parallel two-tube degasser. Figure 3 As shown. The diameter of the filter holes is set to 30 μm, and the cross-section of the tube wall 21 is set to circular. The polyamic acid spinning solution enters the deaerator filter tube 2 through the raw solution tube 1. The vacuum pipe 4 is connected to the vacuum pump, the vacuum valve 41 is opened, and the vacuum pump and electric heater 6 are turned on. The electric heater 6 heats the polyamic acid spinning solution entering the deaerator filter tube 2 to 50°C, reducing its apparent viscosity to 300,000 cP. The gas in the spinning solution passes through the filter holes on the deaerator filter tube 2 and is drawn away by the vacuum pipe 4 connected to the vacuum pump. After the tubular deaerator reaches its replacement cycle, the three-way valve 7 is rotated to switch to another tubular deaerator for continued deaeration. The original tubular deaerator can be disassembled and cleaned.

[0049] Example 2: A spandex spinning solution with an apparent viscosity of 500,000 cP at room temperature was selected as the degassing liquid. Degassing was performed using a parallel two-tube degasser. Figure 3 As shown, the diameter of the filter holes is set to 10 μm, and the cross-section of the tube wall 21 is set to circular. The spandex spinning solution enters the deaerator filter tube 2 through the raw solution tube 1. The vacuum pipe 4 is connected to the vacuum pump, the vacuum valve 41 is opened, and the vacuum pump and electric heater 6 are turned on. The electric heater 6 heats the spandex spinning solution entering the deaerator filter tube 2 to 50°C, reducing its apparent viscosity to 120,000 cP. The gas in the spandex spinning solution passes through the filter holes on the deaerator filter tube 2 and is drawn away by the vacuum pipe 4 connected to the vacuum pump. After the tubular deaerator reaches its replacement cycle, the three-way valve 7 is rotated to switch to another tubular deaerator for continued deaeration. The original tubular deaerator can be disassembled and cleaned.

[0050] Example 3: An aramid spinning solution with an apparent viscosity of 800,000 cP at room temperature was selected as the degassing liquid. Degassing was performed using a parallel two-tube degasser. Figure 3 As shown. The diameter of the filter holes is set to 35 μm, and the cross-section of the tube wall 21 is set to a hexagonal star shape. The aramid spinning solution enters the deaerator filter tube 2 through the raw solution tube 1. The vacuum pipe 4 is connected to the vacuum pump, the vacuum valve 41 is opened, and the vacuum pump and electric heater 6 are turned on. The electric heater 6 heats the aramid spinning solution entering the deaerator filter tube 2 to 40°C, reducing its apparent viscosity to 350,000 cP. The gas in the aramid spinning solution passes through the filter holes on the deaerator filter tube 2 and is drawn away by the vacuum pipe 4 connected to the vacuum pump. After the tubular deaerator reaches its replacement cycle, the three-way valve 7 is rotated to switch to another tubular deaerator for continued deaeration. The original tubular deaerator can be disassembled and cleaned.

[0051] Example 4: An epoxy resin paint with an apparent viscosity of 8000 cP at room temperature was selected as the liquid to be degassed. Degassing was performed using a parallel two-tube degassing device. Figure 3As shown, the diameter of the filter holes is set to 2μm, and the cross-section of the tube wall 21 is set to circular. Epoxy resin paint is introduced into the deaerator filter tube 2 through the raw liquid tube 1. The vacuum pipe 4 is connected to the vacuum pump, the vacuum valve 41 is opened, and the vacuum pump is started. The gas inside the epoxy resin paint passes through the filter holes on the deaerator filter tube 2 and is drawn away by the vacuum pipe 4 connected to the vacuum pump. After the tubular deaerator reaches its replacement cycle, the three-way valve 7 is rotated to switch to another tubular deaerator for continued deaeration. The original tubular deaerator can be disassembled and cleaned.

[0052] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tubular deaerator characterized by, The device comprises: a raw liquid pipe, a defoaming filter pipe, a defoaming device jacket and a vacuum pipe; two ends of the defoaming filter pipe are communicated with the raw liquid pipe respectively, forming a channel for flowing the liquid to be defoamed, and a plurality of filter holes for air bubbles to pass through are arranged on the side wall of the defoaming filter pipe; the defoaming device jacket is sleeved on the outer wall of the defoaming filter pipe, and a vacuum cavity is arranged between the defoaming filter pipe and the defoaming device jacket; the vacuum pipe is connected to the defoaming device jacket and communicated with the vacuum cavity, and is used for connecting a vacuum device.

2. The pipe deaerator of claim 1, wherein: a vacuum pump is connected to one end of the vacuum pipe away from the defoaming device jacket, and a vacuum valve is connected to the vacuum pipe.

3. The pipe deaerator of claim 1, wherein: The viscosity of the liquid to be defoamed is 1000-1000000 cP.

4. The pipe deaerator of claim 1, wherein: The defoaming filter pipe comprises a pipe wall and connecting heads fixedly connected to both ends of the pipe wall, the connecting heads are used for connecting the raw liquid pipe, the pipe wall is composed of a plurality of filter pipes with parallel axes, adjacent two filter pipes are in close contact with each other, the filter holes are arranged on the side wall of the filter pipe, and the diameter of the filter hole is 1-100 μm.

5. The pipe deaerator of claim 4, wherein: The diameter of the filter pipe is 1-5 mm.

6. The pipe deaerator of claim 4, wherein: The cross section of the pipe wall is circular or polygonal.

7. The pipe deaerator of claim 4, wherein: The filter pipe comprises a spiral spring and a support rod inserted into the spiral spring.

8. The pipe deaerator of claim 7, wherein: The diameter of the spring wire of the spiral spring is 0.2-1 mm, and the pitch gap of the spiral spring is less than 0.05 mm.

9. A pipe deaerator according to any one of claims 1-7, characterized in that: An electric heater is connected to the outer wall of the raw liquid pipe.

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