Tail gas demisting device for salt manufacturing process

Abstract

The tail gas demisting device comprises an equipment shell, a gas outlet and a gas inlet which are respectively formed in the upper side and the lower side of the equipment shell, and an ionization generation part and a dust collection part which are arranged in the equipment shell, a cooling pipeline is arranged in the air inlet, and the two ends of the cooling pipeline extend to the outer side of the air inlet and are connected with liquid supply equipment; a rotating rod is rotationally connected into the air outlet, and fan blades are arranged at the top end of the rotating rod. According to the utility model, the cooling pipeline is arranged in the air inlet, and the cooling pipeline exchanges heat with the tail gas at the air inlet, so that vaporous water in the tail gas is liquefied in advance, the moisture in the tail gas can be treated in the tail gas dust removal process, and demisting equipment does not need to be arranged at the air outlet of dust removal equipment; the occupied space of the tail gas treatment device is reduced and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of salt production tail gas treatment technology, specifically to a tail gas demisting device for a salt production process. Background Technology

[0002] During the drying process of salt production, exhaust gas containing a large amount of dust particles is generated. Dust removal equipment is needed to treat the exhaust gas to ensure that the exhaust gas emissions meet the standards. During the exhaust gas treatment process, due to the high temperature of the exhaust gas, the moisture contained in the exhaust gas exists in gaseous form and is not removed during dust removal. When the exhaust gas is discharged from the dust removal equipment to the outside, it comes into contact with the outside environment and cools down, causing the gaseous water to liquefy and form white mist (fog-like condensate). In order to avoid a large amount of white mist at the exhaust gas outlet causing people to misunderstand the emission standards, a demisting device is generally installed at the outlet of the dust removal equipment.

[0003] For example, patent number 202420475204X, entitled "A Dust and Mist Removal Device for Salt Production Processes with a Crystallization Removal Structure," includes: a device shell and a housing. The device shell has a first through hole and an air inlet on its upper and lower sides, respectively. The housing has an air outlet and a second through hole on its upper and lower sides, respectively. The housing is movably mounted on the top of the device shell, with the second through hole aligned with the first through hole. Both the device shell and the housing contain an ionization generator and a dust collection unit. The side wall of the housing has an opening for allowing outside air to enter the housing. In this application, the housing and the device shell are movably connected, allowing the housing to move and the first and second through holes to be misaligned. This prevents exhaust gas from entering the housing after it is discharged from the device shell, allowing the demisting component to operate selectively, reducing energy consumption, and decreasing the frequency of maintenance required, thus lowering costs. However, the demisting device disclosed in this patent increases the overall height of the exhaust gas treatment device, occupying more space and presenting certain limitations. Utility Model Content

[0004] To address the technical problem of installing demisting devices at the outlet of conventional dust removal equipment, which would increase the overall height of the exhaust gas treatment device and occupy more space, this technical solution provides an exhaust gas demisting device for salt production processes. A cooling pipe is installed in the air inlet, and heat exchange is performed between the cooling pipe and the exhaust gas at the inlet, causing the gaseous water in the exhaust gas to liquefy in advance. This allows the moisture in the exhaust gas to be treated during the dust removal process, eliminating the need to install a demisting device at the outlet of the dust removal equipment and reducing the space occupied by the exhaust gas treatment device; effectively solving the aforementioned problems.

[0005] This utility model is achieved through the following technical solution:

[0006] A tail gas demisting device for a salt production process includes a housing, an air outlet and an air inlet respectively disposed on the upper and lower sides of the housing, and an ionization generator and a dust collection unit disposed inside the housing; the air inlet is provided with a cooling pipe, the two ends of which extend to the outside of the air inlet and are connected to a liquid supply device; a rotating rod is rotatably connected inside the air outlet, and a fan blade is provided at the top of the rotating rod.

[0007] Furthermore, at the bottom of the inner wall of the air inlet, there is an annular groove located below the cooling pipe, and a contact element for fitting against the outer wall of the cooling pipe is provided in the annular groove.

[0008] Furthermore, the liquid supply device includes a liquid storage tank and two delivery pumps installed inside the liquid storage tank, with the output ports of both delivery pumps connected to the inlet end of the cooling pipe.

[0009] Furthermore, a slot is provided on the side wall of the rotating rod, a movable block and an elastic element connected to the movable block are slidably inserted in the slot, a touch switch for controlling the operation of a delivery pump is provided in the slot, and a pressure block for pressing the touch switch is provided on the movable block.

[0010] Furthermore, the outermost edge of the top of the slot is provided with a downward-facing protrusion that acts on the pressure block. The pressure block is located on the top of the inner end of the movable block and has a sloping shape that is lower on the outside and higher on the inside.

[0011] Furthermore, the bottom end of the rotating rod is provided with a mounting hole, and a conductive rod is rotatably installed in the mounting hole. The conductive rod is aligned with the axis of the rotating rod. The two ends of the conductive rod are electrically connected to a delivery pump and a touch switch, respectively. When the touch switch is activated, the delivery pump can be started.

[0012] Furthermore, the bottom of the conductive rod is connected to the delivery pump via a conductive cable, and the top of the conductive rod is provided with a conductive block that is in contact with its side wall. The conductive block is electrically connected to the touch switch via a conductive cable.

[0013] Furthermore, an installation block is fixedly installed on the side wall of the mounting hole at a position corresponding to the conductive block, and an elastic component is provided between the installation block and the conductive block, or / and between the installation block and the side wall of the mounting hole. Beneficial effects

[0014] The tail gas demisting device for salt production process proposed in this utility model has the following advantages compared with the prior art:

[0015] (1) This technical solution installs a cooling pipe in the air inlet and uses the cooling pipe to exchange heat with the exhaust gas at the air inlet, so that the gaseous water in the exhaust gas is liquefied in advance, so that the water in the exhaust gas can be treated during the dust removal process. There is no need to install a demisting device at the air outlet of the dust removal equipment, which reduces the space occupied by the exhaust gas treatment device and reduces the cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the connection structure between the air inlet and the cooling pipe in this utility model.

[0018] Figure 3 This is a schematic diagram of the connection structure between the rotating rod and the fan blades in this utility model.

[0019] Figure 4 This is a schematic diagram of the connection structure between the conductive block and the conductive rod in this utility model.

[0020] The labels in the attached diagram are as follows: 1-Equipment housing, 2-Air inlet, 3-Air outlet, 4-Ionization generator, 5-Dust collection unit, 6-Cooling pipe, 7-Fan blade, 8-Annular groove, 9-Contact element, 10-Rotating rod, 11-Modular block, 12-Slot, 13-Elastic element, 14-Touch switch, 15-Mounting hole, 16-Conductive rod, 17-Cable, 18-Conductive block, 19-Mounting block, 20-Pressure block, 21-Protrusion, 22-Elastic element. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Various modifications and improvements to the technical solutions of the present utility model made by those skilled in the art without departing from the design concept of the present utility model should fall within the protection scope of the present utility model. Example

[0022] Please see Figure 1 A tail gas demisting device for a salt production process includes: a housing 1, with an air inlet 2 at the bottom and an air outlet 3 at the top; an ionization generator 4 and a dust collection unit 5 are provided inside the housing 1, wherein the ionization generator 4 includes a mounting frame and an ionization wire mounted on the mounting frame, and the mounting frame is connected to the inner cavity of the housing 1 by an insulating rod; the dust collection unit 5 includes a bracket and a dust collection net (made of stainless steel) mounted on the bracket; during the tail gas treatment process, the ionization wire is energized and the dust collection net is grounded, so that a plasma field is generated between the ionization generator 4 and the dust collection unit 5.

[0023] Please see Figure 1 and Figure 2 The air inlet 2 is equipped with a cooling pipe 6, and both ends of the cooling pipe 6 extend to the outside of the air inlet 2 and are connected to the liquid supply equipment.

[0024] Working principle: When the exhaust gas generated during the salt production process passes through the air inlet 2, it comes into contact with the cooling pipe 6 (the liquid supply equipment is working, causing the lower temperature heat exchange medium to circulate inside the cooling pipe 6), which lowers the temperature of the exhaust gas. The gaseous water in the exhaust gas is condensed into white mist (mist-like condensate), and the exhaust gas enters the interior of the equipment housing 1. The plasma field between the ionization generator 4 and the dust collection unit 5 captures the dust particles, crystals, and condensate in the exhaust gas (the captured dust particles, crystals, and condensate all fall onto the dust collection unit 5). The treated exhaust gas is discharged from the air outlet 3.

[0025] It should be noted that by using cooling pipe 6 to exchange heat with the exhaust gas at the air inlet 2, the gaseous water in the exhaust gas is liquefied in advance. This allows the moisture in the exhaust gas to be treated during the dust removal process, eliminating the need to install a demisting device at the air outlet of the dust removal equipment, thus reducing the space occupied by the exhaust gas treatment device and lowering production costs.

[0026] It should also be noted that a collection tank is installed at the bottom of the dust collection unit 5 to collect the condensate captured by the dust collection unit 5.

[0027] In this embodiment, as a further optimization, please refer to... Figure 2 An annular groove 8 is provided inside the air inlet 2. The annular groove 8 is located below the cooling pipe 6. A contact element 9 is provided inside the annular groove 8. The end of the contact element 9 away from the annular groove 8 is in contact with the outer wall of the cooling pipe 6. When the gaseous water in the exhaust gas liquefies, some liquid water adheres to the outer wall of the cooling pipe 6. The contact element 9 is used to guide the liquid water adhering to the outer wall of the cooling pipe 6 so that it falls into the annular groove 8 for collection.

[0028] It should be noted that a pipe extending to the outside of the air inlet 2 is installed on the annular groove 8 to guide the water inside the annular groove 8 away. Example

[0029] As a further optimization of Example 1, please refer to Figure 1 , Figure 3 and Figure 4 The liquid supply equipment includes a liquid storage tank containing a heat exchange medium (such as water). Two delivery pumps are installed inside the liquid storage tank, and the outlets of the two delivery pumps are connected to the inlet of the cooling pipe 6. During the process of cooling the exhaust gas, only one delivery pump starts working first, continuously introducing the heat exchange medium inside the liquid storage tank into the cooling pipe 6.

[0030] It should be noted that, in order to increase energy efficiency, a heat exchanger can be installed at the outlet end of cooling pipe 6 to cool the heat exchange medium. The cooled heat exchange medium flows back into the storage tank. Heat exchange through the heat exchanger can recover and utilize the heat in the heat exchange medium, so that the heat contained in the exhaust gas can be fully utilized.

[0031] In this embodiment, as a further optimization, please refer to... Figure 4 A rotating rod 10 is rotatably installed inside the air outlet 3. A fan blade 7 is installed at the top of the rotating rod 10. A slot 12 is opened on the side wall of the rotating rod 10. A movable block 11 is slidably inserted in the slot 12. An elastic element 13 (such as a spring; the spring here is a spring with a small elastic coefficient, which is easy to deform) is installed between the slot 12 and the movable block 11. A touch switch 14 is installed in the slot 12. A pressure block 20 is installed on the movable block 11. The pressure block 20 is located at the top of the inner end of the movable block 11 and is in the shape of a slope that is lower on the outside and higher on the inside. A protrusion is provided at the outermost edge of the top of the slot 12, which is set downward and acts on the pressure block 20.

[0032] As the exhaust gas is discharged from the outlet 3, it carries the fan blades 7, causing the rotating rod 10 to rotate as well. During the rotation of the rotating rod 10, due to the easy deformation of the elastic element, the movable block 11 will experience a greater centrifugal force as the rotation speed of the rotating rod 10 increases (the more and faster the exhaust gas passes through the outlet 3, the faster the rotation speed of the rotating rod 10). This causes the movable block 11 to move outward from the slot 12, causing the protrusion 21 to act on the pressure block 20. The pressure block 20 then causes the movable block 11 to move slightly downward, pressing the touch switch 14 to connect the power supply to another delivery pump, enabling it to work and deliver heat exchange medium to the cooling pipe 6, thereby increasing the flow rate of the heat exchange medium inside the cooling pipe 6. When the exhaust gas velocity is high and the flow rate is large, the flow rate of the heat exchange medium inside the cooling pipe 6 also increases, ensuring heat exchange efficiency and ensuring that the gaseous water in the exhaust gas can be fully liquefied.

[0033] In this embodiment, as a further optimization, please refer to... Figure 4 The bottom end of the rotating rod 10 has a mounting hole 15, and a conductive rod 16 is rotatably mounted in the mounting hole 15. The conductive rod 16 coincides with the axis of the rotating rod 10. The conductive rod 16 is electrically connected to a delivery pump through a cable 17. A conductive block 18 is provided in the mounting hole 15, and the conductive block 18 is attached to the side wall of the conductive rod 16. The conductive block 18 is electrically connected to the touch switch 14 through a wire. During the rotation of the rotating rod 10, the conductive block 18 rotates and is attached to the side wall of the conductive rod 16. The rotational connection between the conductive rod 16 and the rotating rod 10 allows the conductive rod 16 to not rotate with the rotating rod 10, so that the rotation of the rotating rod 10 will not affect the cable 17, thus ensuring the normal connection between the touch switch 14 and the delivery pump.

[0034] In this embodiment, as a further optimization, please refer to... Figure 4 An installation block 19 is provided in the installation hole 15. An installation groove is opened on the side of the installation block 19 facing the conductive rod 16. The conductive block 18 is slidably inserted into the installation groove. An elastic element 22 is installed between the installation groove and the conductive block 18 (the elastic element here can be a spring with a slightly larger elastic coefficient and not easily deformed; or a rubber elastic component can be used directly). The elastic element provides a pushing force to the conductive block 18 to ensure that the conductive block 18 and the conductive rod 16 are fully in contact.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tail gas demisting device for a salt production process, comprising a housing (1), an outlet (3) and an inlet (2) respectively disposed on the upper and lower sides of the housing (1), and an ionization generator (4) and a dust collection unit (5) disposed within the housing (1); characterized in that: The air inlet (2) is provided with a cooling pipe (6), and both ends of the cooling pipe (6) extend to the outside of the air inlet (2) and are connected to the liquid supply equipment; the air outlet (3) is rotatably connected with a rotating rod (10), and the top of the rotating rod (10) is provided with a fan blade (7).

2. The tail gas demisting device for a salt production process according to claim 1, characterized in that: At the bottom of the inner wall of the air inlet (2), there is an annular groove (8) located below the cooling pipe (6), and there is a contact element (9) in the annular groove (8) for fitting with the outer wall of the cooling pipe (6).

3. The tail gas demisting device for a salt production process according to claim 1, characterized in that: The liquid supply equipment includes a liquid storage tank and two delivery pumps installed inside the liquid storage tank. The output ports of the two delivery pumps are connected to the inlet end of the cooling pipe (6).

4. The tail gas demisting device for a salt production process according to claim 1, characterized in that: A slot (12) is provided on the side wall of the rotating rod (10). A movable block (11) and an elastic element (13) connected to the movable block (11) are slidably inserted in the slot (12). A touch switch (14) for controlling the operation of a delivery pump is provided in the slot (12). A pressure block for pressing the touch switch (14) is provided on the movable block (11).

5. The tail gas demisting device for a salt production process according to claim 4, characterized in that: The top outermost edge of the slot (12) is provided with a protrusion (21) that is set downward and acts on the pressure block (20). The pressure block (20) is set on the top of the inner end of the movable block (11) and is in the shape of a slope that is lower on the outside and higher on the inside.

6. The tail gas demisting device for a salt production process according to claim 4, characterized in that: The bottom end of the rotating rod (10) is provided with a mounting hole (15), and a conductive rod (16) is rotatably installed in the mounting hole (15). The axis of the conductive rod (16) coincides with that of the rotating rod (10). The two ends of the conductive rod (16) are electrically connected to a delivery pump and a touch switch (14) respectively. When the touch switch (14) is touched, the delivery pump can be started.

7. The tail gas demisting device for a salt production process according to claim 6, characterized in that: The bottom of the conductive rod (16) is connected to the delivery pump via a conductive cable (17), and the top of the conductive rod (16) is provided with a conductive block (18) that is in contact with its side wall. The conductive block (18) is electrically connected to the touch switch (14) via the conductive cable (17).

8. The tail gas demisting device for a salt production process according to claim 7, characterized in that: On the side wall of the mounting hole (15), a mounting block is fixedly installed at a position corresponding to the conductive block (18), and an elastic component is provided between the mounting block and the conductive block, or / and between the mounting block and the side wall of the mounting hole (15).

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