Venturi scrubber

Abstract

The invention relates to a venturi scrubber. The venturi scrubber comprises a scrubber cylinder and a venturi scrubbing tube in the cylinder, one end of the washer cylinder is an air inlet, and the other end is an outlet; the venturi washing pipe is arranged at the end, close to the air inlet, in the washer cylinder, the outer wall of an inlet of the venturi washing pipe is connected with a plurality of supporting plates, the other sides of the supporting plates are connected with the inner wall of the washer cylinder, the supporting plates are separated from one another, and the outer wall of an outlet of the venturi washing pipe is connected with the inner wall of the washer cylinder in a sealed mode. A space between the outer wall of the venturi washing pipe and the inner wall of the washer cylinder is an overflow cavity, and an inlet of the venturi washing pipe forms an overflow weir; a water inlet is formed in the washer cylinder between the inlet and the outlet of the Venturi washing pipe and is communicated with the overflow cavity. The venturi scrubber provided by the invention has the advantages of improving the washing effect, simplifying the preparation process, prolonging the service life of equipment, reducing the production and maintenance cost and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of synthesis gas processing equipment, in particular to a Venturi scrubber. Background Art

[0002] Venturi scrubbers are important dust removal equipment, widely used to purify high-temperature, dusty syngas to improve the quality of synthetic chemical products. Existing Venturi scrubbers typically utilize radial or axial inward spraying for flushing water. However, due to the high solids content, alkalinity, and hardness of the flushing water, these scrubbers are prone to clogging and damage, affecting the scrubbing effect. Furthermore, existing Venturi scrubbers are complex to manufacture and have high production and maintenance costs. Summary of the Invention

[0003] An object of the present invention is to provide a venturi scrubber to at least partially solve the above-mentioned problems in the prior art.

[0004] To achieve the above object, the present invention provides a venturi scrubber, characterized in that it comprises a scrubber barrel and a venturi scrubbing pipe in the barrel; wherein,

[0005] One end of the scrubber cylinder is an air inlet, and the other end is an exhaust port;

[0006] The venturi scrubber is disposed inside the scrubber barrel near one end of the air inlet, the outer wall of the venturi scrubber inlet is connected to a plurality of support plates, the other sides of the plurality of support plates are connected to the inner wall of the scrubber barrel, the plurality of support plates are spaced apart from each other, the outer wall of the venturi scrubber outlet is sealed to the inner wall of the scrubber barrel, the space between the outer wall of the venturi scrubber and the inner wall of the scrubber barrel is an overflow chamber, and the venturi scrubber inlet forms an overflow weir;

[0007] A water inlet is provided on the washer cylinder between the inlet and the outlet of the venturi washing pipe, and the water inlet is communicated with the overflow chamber.

[0008] Furthermore, it also includes a guide tube, which is in a closed shape and is arranged inside the scrubber cylinder near one end of the air inlet. The outer wall of the guide tube inlet is connected to the inner wall of the scrubber cylinder, and the guide tube outlet extends into the Venturi washing tube. The synthetic gas enters the Venturi washing tube through the guide tube, and a gap is left between the outer wall of the guide tube outlet and the inner wall of the Venturi washing tube.

[0009] Furthermore, the support plate is also connected to the outer wall of the guide tube to position and support the guide tube.

[0010] Furthermore, the guide tube has a streamlined closing structure or a cone-shaped closing structure.

[0011] Furthermore, the inlet of the Venturi washing pipe is configured as a straight pipe section, and the straight pipe section forms an overflow weir.

[0012] Furthermore, a guide groove is provided on the top surface of the inlet of the venturi washing tube.

[0013] Furthermore, at least a portion of the guide groove is a zigzag guide groove.

[0014] Furthermore, the support plates are evenly distributed along the scrubber cylinder, with a number of 4-6 pairs.

[0015] Furthermore, a wear-resistant layer is provided on the inner wall of the Venturi washing tube and / or the outer wall of the Venturi washing tube opposite to the water inlet.

[0016] Furthermore, the outer wall of the venturi washing pipe outlet is connected to the inner wall of the washing device cylinder through an annular gasket.

[0017] Furthermore, a weld is provided on the scrubber cylinder, and the weld is located after the outlet of the venturi scrubbing tube.

[0018] Compared with the prior art, the present invention has at least the following advantages:

[0019] By setting up an overflow chamber, an overflow weir is formed at the inlet of the Venturi washing pipe, and the flushing water flow rate is uniform, which is beneficial to gas-liquid mixing and improves the purification effect, and is easy to form a water film to protect the equipment, and can enhance gas-liquid mixing and improve the washing effect; reduce equipment damage caused by blockage and wear, enhance the high temperature resistance of the equipment, extend the service life and operational stability; the preparation process is simple, the internal parts are easy to replace, and the production and maintenance costs are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a Venturi scrubber provided in Example 1 of the present invention.

[0021] Figure 2 This is an enlarged schematic diagram of the structure of one end of the air inlet of a Venturi scrubber provided in Example 1 of the present invention.

[0022] Figure 3 This is an enlarged schematic diagram of the structure of one end of the venturi washing tube outlet of a venturi scrubber provided in Example 1 of the present invention.

[0023] Figure 4 A schematic diagram of the partial structure of a zigzag guide groove of a Venturi scrubber provided in Example 1 of the present invention.

[0024] Reference numerals:

[0025] Scrubber cylinder 1, Venturi scrubbing tube 2, air inlet 3, discharge port 4, support plate 5, overflow chamber 6, water inlet 7, guide tube 8, contraction section 9, throat 10, diffusion section 11, straight pipe section 12, guide groove 13, wear-resistant layer 14, elbow structure 15, annular gasket 16, weld 17, discharge port 18, ear seat 19, pressure transmitter port 20. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to facilitate understanding of the embodiments of the present invention described herein. In addition, the terms "including," "comprising," and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a product or device comprising a series of elements is not necessarily limited to those elements explicitly listed, but may include other elements not explicitly listed or inherent to the product or device.

[0028] In the present invention, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe the present invention and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0029] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0030] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Example 1

[0033] Embodiment 1 of the present invention provides a venturi scrubber, referring to Figure 1 As shown, it includes a scrubber cylinder 1 and a venturi scrubber tube 2 in the cylinder, wherein one end of the scrubber cylinder 1 is an air inlet 3 and the other end is an exhaust port 4. Figure 2 As shown, the venturi scrubber 2 is arranged inside the scrubber barrel 1 near one end of the air inlet 3, and the outer wall of the inlet of the venturi scrubber 2 is connected to multiple support plates 5, and the other side of the multiple support plates 5 is connected to the inner wall of the scrubber barrel 1, and the multiple support plates 5 are spaced apart from each other. Figure 3 As shown, the outer wall of the outlet of the venturi washing pipe 2 is sealed with the inner wall of the washing cylinder 1. Figure 1 As shown, the space between the outer wall of the Venturi scrubber tube 2 and the inner wall of the scrubber housing 1 forms an overflow chamber 6. The inlet of the Venturi scrubber tube 2 forms an overflow weir. A water inlet 7 is provided on the scrubber housing 1 between the inlet and outlet of the Venturi scrubber tube 2, communicating with the overflow chamber 6. Syngas enters the Venturi scrubber tube 2 through the gas inlet 3. Flushing water enters the overflow chamber 6 through the water inlet 7 and overflows into the Venturi scrubber tube 2. The flushing water and syngas mix in the Venturi scrubber tube 2 before being discharged through the outlet 4.

[0034] By adopting the solution provided by the embodiment of the present invention, the following technical effects are achieved: the flow rate of the flushing water is uniform, which is beneficial to gas-liquid mixing, improves the purification effect, and easily forms a water film to protect the equipment; it can also reduce equipment damage and poor washing effect caused by blockage and wear; the flushing water also plays a cooling role, increases the high temperature resistance of the equipment, extends its service life and operational stability, and reduces maintenance costs; the equipment manufacturing process is simple, which reduces production costs.

[0035] refer to Figure 1 、 Figure 2As shown, this embodiment of the present invention preferably further includes a draft tube 8. This draft tube 8 is a closed-end device disposed within the scrubber housing 1 near the air inlet 3. The inlet of the draft tube 8 is connected to the inner wall of the scrubber housing 1, for example, by welding. The outlet of the draft tube 8 extends into the venturi scrubber 2. Syngas enters the venturi scrubber 2 through the draft tube 8. A gap is left between the outer wall of the outlet of the draft tube 8 and the inner wall of the venturi scrubber 2.

[0036] The provision of draft tube 8 provides a more uniform airflow velocity distribution at the inlet of the Venturi scrubber 2, facilitating mixing of the syngas and flushing water, and improving syngas purification. The design principle of draft tube 8 is to have a relatively small angle and a relatively long length to better prevent excessive airflow congestion. In other embodiments, draft tube 8 may not be provided.

[0037] refer to Figure 2 As shown, preferably, multiple support plates 5 are also connected to the outer wall of the guide tube 8 to position and support the guide tube 8. By integrating the guide tube 8, support plates 5, and venturi scrubber 2, the potential for displacement of the guide tube 8 and venturi scrubber 2 during operation is reduced, thereby enhancing the overall stability of the equipment and reducing maintenance costs. In other embodiments, the outer wall of the guide tube 8 may not be connected to the support plates 5.

[0038] refer to Figure 2 As shown, the guide tube 8 has a streamlined or conical closing structure, which helps optimize airflow distribution. The cone closing angle is preferably in the range of 10 degrees to 40 degrees. The guide tube 8 is preferably made of wear-resistant duplex stainless steel.

[0039] The venturi scrubber 2 generally comprises a contraction section 9, a throat 10 and a diffusion section 11 which are connected in sequence. Figure 1 、 Figure 2 As shown, the inlet of the Venturi scrubber 2 in this embodiment is further provided with a straight pipe section 12, which forms an overflow weir, further simplifying the production process and reducing production costs. Preferably, the height of the straight pipe section 12 is 20-40 mm. In other embodiments, the straight pipe section 12 may not be provided, and the inlet of the Venturi scrubber 2 may be directly connected to the contraction section 9, which forms an overflow weir.

[0040] refer to Figure 4 As shown, a guide groove 13 is provided on the top surface of the inlet of the venturi scrubber 2, i.e., the top surface of the overflow weir, to further guide the flushing water, allowing the flushing water to flow more evenly into the inner wall of the venturi scrubber 2, thereby enhancing gas-liquid mixing and more easily forming a water film to protect the equipment. In other embodiments, the guide groove 13 may not be provided on the top surface of the overflow weir.

[0041] refer to Figure 4As shown, the guide groove 13 can be configured as a zigzag shape in whole or in part to break bubbles and foam in the rinse water and optimize the washing effect. Preferably, the zigzag shape has a width of 5-10 mm, a depth of 3-5 mm, and a spacing of 10-15 mm between adjacent grooves. In other embodiments, the guide groove 13 may not be configured as a zigzag shape.

[0042] Preferably, multiple support plates 5 are evenly distributed along the scrubber drum 1 to enhance the stability of the device and optimize the flow of flushing water, making the flow rate more uniform, enhancing gas-liquid mixing, and facilitating the formation of a water film to protect the device. The number of support plates is preferably 4-6 pairs, and the height is preferably 50-80 mm.

[0043] refer to Figure 1 As shown, the water inlet 7 is preferably located on the scrubber housing 1 near the outlet of the venturi scrubber tube 2, opposite the diffuser 11, to more efficiently utilize the flushing water to reduce the equipment temperature. In other embodiments, the water inlet 7 may be located elsewhere on the scrubber housing 1, but should be located between the inlet and outlet of the venturi scrubber tube 2 and communicate with the overflow chamber 6.

[0044] refer to Figure 3 As shown, a wear-resistant layer 14 is provided on the outer wall of the Venturi washing pipe 2 opposite the water inlet 7, which reduces the wear and erosion of the equipment by solid particles in the flushing water, thereby extending the service life of the equipment, ensuring stable operation of the equipment, and reducing maintenance costs. In other embodiments, the outer wall of the Venturi washing pipe 2 opposite the water inlet 7 may not be provided with a wear-resistant layer.

[0045] like Figure 1 、 2 As shown in Figures 3 and 4, the entire inner wall of the Venturi scrubber 2 is provided with a wear-resistant layer 14, which reduces wear and erosion of the equipment by coal dust particles in the synthesis gas and solid particles in the flushing water, thereby extending the service life of the equipment, ensuring stable operation of the equipment, and reducing maintenance costs. In other embodiments, the inner wall of the Venturi scrubber 2 may be partially provided with a wear-resistant layer, or may not be provided with a wear-resistant layer.

[0046] like Figure 1 As shown, the exhaust port 4 of the scrubber drum 1 has an elbow structure 15 at one end. A wear-resistant layer 14 is provided on the inner wall of the elbow structure 15. This reduces wear and erosion caused by coal dust particles in the synthesis gas and solid particles in the flushing water, thereby extending the equipment's service life, ensuring stable operation, and reducing maintenance costs. In other embodiments, the elbow structure and wear-resistant layer may not be provided.

[0047] Preferably, the wear-resistant layer 14 has a thickness of 6-10 mm and is formed by surfacing or spraying.

[0048] like Figure 3As shown, the outer wall of the outlet of the venturi washing tube 2 is connected to the inner wall of the scrubber barrel 1 through an annular gasket 16, which can simplify the manufacturing process and facilitate the replacement and maintenance of the internal parts such as the venturi washing tube 2 and multiple support plates 5 inside the scrubber barrel 1. The annular gasket 16 is welded to the inner wall of the scrubber barrel 1 or formed by surfacing. Preferably, the height of the annular gasket 16 is 20-30 mm and the thickness is 6-10 mm. In other embodiments, the annular gasket 16 may not be provided, and the outer wall of the outlet of the venturi washing tube 2 is directly sealed and connected to the inner wall of the scrubber barrel 1.

[0049] like Figure 1 and Figure 3 As shown, a weld 17 is provided on the scrubber housing 1. Weld 17 is located after the outlet of the venturi scrubber tube 2, preferably 30-60 mm after the diffuser 11. This facilitates replacement and repair of internal components within the scrubber housing 1. If internal components require replacement or repair, the components can be cut open at weld 17 for the relevant operation. In other embodiments, weld 17 may not be provided.

[0050] The Venturi scrubber internals provided in this embodiment include a draft tube 8, multiple support plates 5, a Venturi scrubber tube 2, and an annular spacer 16. The installation sequence is as follows: first, evenly position and weld the multiple support plates 5 to the inner wall of the scrubber housing 1. Then, place the draft tube 8 on the multiple support plates 5, and weld the outer wall of the draft tube 8 inlet to the inner wall of the scrubber housing 1. Next, insert the straight pipe section 12 at the inlet end of the Venturi scrubber tube 2 into the multiple support plates 5. Finally, seal the outer wall of the diffuser section 11 at the outlet end of the Venturi scrubber tube 2 to the inner wall of the scrubber housing 1 via the annular spacer 16. The internals removal sequence is the reverse of the installation sequence.

[0051] refer to Figure 1 As shown, the scrubber housing 1 is also equipped with a drain port 18, a lug 19, and a pressure transmitter port 20. The drain port 18 is a backup port and is normally closed. The lug 19 is used to secure the Venturi scrubber to the frame. The pressure transmitter port 20 is used to measure the pressure inside the housing.

[0052] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit them. Those skilled in the art will appreciate that the technical solutions described in the aforementioned embodiments may be modified, or some of the technical features thereof may be replaced with equivalents; such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A Venturi scrubber, characterized in that: It includes a scrubber cylinder and a venturi scrubbing tube in the cylinder; wherein, One end of the scrubber cylinder is an air inlet, and the other end is an exhaust port; The venturi scrubber is disposed inside the scrubber barrel near one end of the air inlet, the outer wall of the venturi scrubber inlet is connected to a plurality of support plates, the other sides of the plurality of support plates are connected to the inner wall of the scrubber barrel, the plurality of support plates are spaced apart from each other, the outer wall of the venturi scrubber outlet is sealed to the inner wall of the scrubber barrel, the space between the outer wall of the venturi scrubber and the inner wall of the scrubber barrel is an overflow chamber, and the venturi scrubber inlet forms an overflow weir; A water inlet is provided on the washer cylinder between the inlet and the outlet of the venturi washing pipe, and the water inlet is communicated with the overflow chamber.

2. A venturi scrubber according to claim 1, characterized in that: It also includes a guide tube, which is in a closed shape and is arranged inside the scrubber cylinder near one end of the air inlet. The outer wall of the guide tube inlet is connected to the inner wall of the scrubber cylinder, and the guide tube outlet extends into the Venturi washing tube. The synthetic gas enters the Venturi washing tube through the guide tube, and a gap is left between the outer wall of the guide tube outlet and the inner wall of the Venturi washing tube.

3. A venturi scrubber according to claim 2, characterized in that: The support plate is also connected to the outer wall of the guide tube to position and support the guide tube.

4. A venturi scrubber according to claim 2, characterized in that: The guide tube has a streamlined closing structure or a cone closing structure.

5. The venturi scrubber according to claim 1, characterized in that: The inlet of the venturi washing pipe is arranged as a straight pipe section, and the straight pipe section forms an overflow weir.

6. The venturi scrubber according to claim 1, characterized in that: A guide groove is provided on the top surface of the inlet of the venturi washing pipe.

7. A venturi scrubber according to claim 6, characterized in that: At least a portion of the guide groove is a zigzag guide groove.

8. The venturi scrubber according to claim 1, characterized in that: The support plates are evenly distributed along the scrubber cylinder, with a number of 4-6 pairs.

9. The venturi scrubber according to claim 1, characterized in that: A wear-resistant layer is provided on the inner wall of the Venturi washing pipe and / or the outer wall of the Venturi washing pipe opposite to the water inlet.

10. The venturi scrubber according to claim 1, characterized in that: The outer wall of the venturi washing pipe outlet is connected to the inner wall of the washing device cylinder through an annular gasket.

11. The venturi scrubber according to claim 1, characterized in that: A weld is provided on the scrubber cylinder, and the weld is located after the outlet of the venturi scrubbing pipe.

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