Spraying mechanism and pre-oxidation device thereof

Abstract

The utility model relates to the technical field of industrial desulfurization, denitration and demercuration of a pre-oxidation device, in particular to a spraying mechanism and a pre-oxidation device, which are characterized in that a smoke inlet pipe is arranged on the surface of a barrel body; the spraying mechanism comprises a water tank mounted at the top of the barrel body, a water pipe connected with the water tank and a spraying head connected with one end of the water pipe; the height adjusting mechanism comprises a bearing plate arranged in the inner cavity of the barrel body, a reciprocating lead screw in threaded connection with the bearing plate, and a limiting rod rotationally connected with the bearing plate; the angle adjusting mechanism comprises an extrusion disc in threaded connection with the reciprocating lead screw and an elastic assembly installed on the top of the bearing plate. By arranging the height adjusting mechanism, the spraying head can alternately move up and down in a reciprocating mode, the contact area of an oxidizing agent and flue gas is increased, the effect of full oxidation of the flue gas is achieved, by arranging the angle adjusting mechanism, the angle of the spraying head can be adjusted in a reciprocating mode, the spraying area of the oxidizing agent is increased, and the oxidation effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial desulfurization, denitration and mercury removal of pre-oxidation devices, in particular to a spray mechanism and a pre-oxidation device thereof. Background Art

[0002] Particulate matter, sulfur dioxide, nitrogen oxides and trace heavy metals emitted by coal combustion are one of the causes of frequent smog in my country. Excessive emissions of sulfur dioxide and nitrogen oxides can also lead to the formation of acid rain. After being exposed to strong solar ultraviolet rays in the atmospheric environment, nitrogen oxides can also undergo photochemical and thermochemical reactions with hydrocarbons to produce secondary pollutants such as aldehydes, ketones, acids, and peroxyacetyl nitrate (PAN), mainly ozone. The mixture of these primary and secondary pollutants forms photochemical smog, which seriously damages the health of humans and animals and affects plant growth.

[0003] After searching, the Chinese utility patent with publication number CN218553633U discloses a desulfurization, denitrification and demercuration device based on a combustion boiler, including a pre-oxidation device and a desulfurization device. The pre-oxidation device is located at the front end of the desulfurization device and is connected to the desulfurization device through a smoke pipe. The pre-oxidation device includes a cylinder, a reaction tank, a circulation pump, a first spray layer, and a first demister. The pre-oxidation device at the front end of the desulfurization device pre-oxidizes NO and Hg0 escaping from the SCR device to generate water-soluble NOx and Hg2+, which enter the desulfurization device and are fully absorbed, thereby achieving ultra-low emissions of coal-fired flue gas pollutants when the thermal power unit is operating at low load.

[0004] In the existing technology, flue gas needs to be pre-oxidized before treatment. The spraying mechanism in the pre-oxidation device is mostly carried out through a spray head, and the installation position of the spray head is fixed, which will lead to insufficient contact between the sprayed solution and the flue gas, resulting in poor flue gas oxidation effect. In addition, the spray water after spraying in the pre-oxidation device is generally discharged directly, resulting in increased costs. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] In view of the above-mentioned problem or the problem in the prior art that the sprayed solution does not contact sufficiently with the flue gas, the present utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a spray mechanism.

[0008] In order to solve the above technical problems, the present utility model provides the following technical solutions: comprising a barrel body, a smoke inlet pipe is installed on the surface of the barrel body;

[0009] A spray mechanism comprising a water tank mounted on the top of the barrel, a water pipe connected to the water tank, and a spray head connected to one end of the water pipe;

[0010] A height adjustment mechanism comprising a receiving plate disposed in the inner cavity of the barrel body, a reciprocating screw threadedly connected to the receiving plate, and a limiting rod rotatably connected to the receiving plate;

[0011] The angle adjustment mechanism includes an extrusion disk threadedly connected to the reciprocating screw, an elastic component installed on the top of the receiving plate, and a linkage rod movably connected to the elastic component. The spray head is movably connected to the inside of the receiving plate, one end of the linkage rod is connected to the spray head, and the other end of the linkage rod is in contact with the extrusion disk.

[0012] As a preferred solution of the spray mechanism of the present invention, the bottom of the extrusion disc is connected to a limiting ring, the top of the receiving plate is provided with an annular groove, and the limiting ring is slidably connected to the inside of the annular groove.

[0013] As a preferred solution of the spray mechanism of the present invention, the elastic component includes a cavity rod, a first spring, a second spring and an extrusion plate, the cavity rod is installed on the top of the receiving plate, the linkage rod and the cavity rod are movably connected, the first spring is slidably connected to the inside of the cavity rod and connected to the surface of the linkage rod, the second spring and the extrusion plate are symmetrically arranged inside the cavity rod, and the first spring is located on the inner side of the second spring and the extrusion plate.

[0014] As a preferred solution of the spraying mechanism of the utility model, one end of the linkage rod is connected to a bonding plate, one side of the bonding plate is fixedly connected to a limiting block, a track groove is opened on the surface of the extrusion disk, and the limiting block is slidably connected to the inside of the track groove.

[0015] As a preferred solution of the spraying mechanism of the utility model, it also includes a retracting and extending mechanism, which includes a mounting plate installed on the top of the inner cavity of the barrel body, a rotating rod rotatably connected to the mounting plate, a winding sleeve installed on the surface of the rotating rod, and a limit plate connected to one end of the rotating rod, a cavity sleeve is installed on one side of the mounting plate, the inner cavity of the cavity sleeve is provided with a torsion spring, and the two ends of the torsion spring are respectively connected to the surface of the rotating rod and the inner wall of the cavity sleeve.

[0016] As a preferred solution of the spray mechanism of the utility model, the reciprocating screw is wound around the surface of the winding sleeve, one end of the water pipe passes through the mounting plate and the barrel body, and one end of the rotating rod passes through the cavity sleeve.

[0017] As a preferred solution of the spraying mechanism of the utility model, it also includes a rotating mechanism, which includes a mounting groove opened on the top of the extrusion disk, the spray head is arranged in the mounting groove, and the surface of the spray head is connected to a connecting rod, and the connecting rod is rotatably connected to the extrusion disk.

[0018] The beneficial effects of the spray mechanism of the present invention: by setting a height adjustment mechanism, the present invention can make the spray head move back and forth alternately, thereby increasing the contact area between the oxidant and the flue gas and achieving the effect of full oxidation of the flue gas. By setting an angle adjustment mechanism, the angle of the spray head can be adjusted back and forth, increasing the spraying area of the oxidant and further improving the oxidation effect.

[0019] In view of the fact that the spray liquid cannot be recycled during actual use, a pre-oxidation device is proposed.

[0020] In order to solve the above technical problems, the utility model also provides the following technical solutions: a pre-oxidation device, including a spraying mechanism and a circulation mechanism, the circulation mechanism including a first connecting pipe connected to the barrel body, a collecting barrel installed at one end of the first connecting pipe, a water pump installed on the top of the collecting barrel, and a circulation pipe connected to the water pump.

[0021] As a preferred solution of the pre-oxidation device of the present invention, the water pump is connected to the water tank through the circulation pipe, a second connecting pipe is provided inside the collection barrel, and one end of the second connecting pipe is connected to the water pump.

[0022] As a preferred solution of the pre-oxidation device of the present invention, the bottom of the collecting barrel is fixedly connected to a support rod, and the bottom end of the support rod is fixedly connected to a support plate.

[0023] The beneficial effects of the pre-oxidation device of the present invention: by setting a circulation mechanism, the present invention can introduce the solution gathered at the bottom of the barrel body after the flue gas is sprayed by the spray head into the collection barrel through the first connecting pipe, and then through the cooperation between the second connecting pipe, the water pump and the circulation pipe, the spray liquid in the collection barrel can be transported to the water tank for recycling, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0026] Figure 2 This is a schematic diagram of the main cross-sectional structure of the present utility model.

[0027] Figure 3 For the utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0028] Figure 4 For the utility model Figure 2 Enlarged structural diagram at point B in the middle.

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the extrusion disk of the present utility model.

[0030] Figure 6 It is a side cross-sectional structural schematic diagram of the utility model.

[0031] Figure 7 This is a schematic diagram of the circulation mechanism structure of the present utility model.

[0032] Figure 8 This is a schematic diagram of the cross-sectional structure of the collection barrel of the present utility model.

[0033] Figure 9 This is a schematic diagram of the overall structure of the desulfurization, denitrification and mercury removal of the utility model. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0037] Example 1

[0038] Reference Figures 1 to 6 , which is the first embodiment of the present utility model, and provides a spray mechanism, including a barrel body 100, a smoke inlet pipe 101 is installed on the surface of the barrel body 100; the spray mechanism 200, which includes a water tank 201 installed on the top of the barrel body 100, a water pipe 202 connected to the water tank 201, and a spray head 203 connected to one end of the water pipe 202; a height adjustment mechanism 300, which includes a receiving plate 301 arranged in the inner cavity of the barrel body 100, a reciprocating screw rod 302 threadedly connected to the receiving plate 301, and a limit rod 303 rotatably connected to the receiving plate 301, a motor 304 is installed on the top of the barrel body 100, one end of the reciprocating screw rod 302 is connected to the output end of the motor 304, and the reciprocating screw rod 302 and the barrel body 100 are rotatably connected. When in use, by turning on the motor 304 to drive the reciprocating screw rod 302 to rotate, under the anti-rotation effect of the limit rod 303, the receiving plate 301 can be made to rotate. The reciprocating screw 302 makes a reciprocating motion up and down, thereby driving the spray head 203 to move synchronously. By lifting and spraying, the contact area between the oxidant and the flue gas is increased, thereby achieving the effect of sufficient oxidation of the flue gas. The angle adjustment mechanism 400 includes an extrusion plate 401 threadedly connected to the reciprocating screw 302, an elastic component 402 installed on the top of the receiving plate 301, and a linkage rod 403 movably connected to the elastic component 402. The spray head 203 is movably connected to the inside of the receiving plate 301, one end of the linkage rod 403 is connected to the spray head 203, and the other end of the linkage rod 403 contacts the extrusion plate 401. When the reciprocating screw 302 rotates, the extrusion plate 401 is driven to rotate synchronously. Under the action of the elastic component 402, the position of the linkage rod 403 can be adjusted, and then the angle of the spray head 203 can be reciprocated to increase the spraying area of the oxidant, thereby improving the oxidation effect.

[0039] It should also be noted that the bottom of the extrusion disk 401 is connected to a limiting ring 401a, and the top of the receiving plate 301 is provided with an annular groove 401b. The limiting ring 401a is slidably connected to the inside of the annular groove 401b. When the reciprocating screw 302 rotates, the limiting ring 401a rotates inside the annular groove 401b, which can prevent the extrusion disk 401 from rotating with the receiving plate 301, and at the same time, the extrusion disk 401 and the receiving plate 301 can also be fitted together.

[0040] Furthermore, the elastic component 402 includes a cavity rod 402a, a first spring 402b, a second spring 402c and an extrusion plate 402d. The cavity rod 402a is installed on the top of the receiving plate 301. The linkage rod 403 and the cavity rod 402a are movably connected. The first spring 402b is slidably connected to the inside of the cavity rod 402a and is connected to the surface of the linkage rod 403. The second spring 402c and the extrusion plate 402d are symmetrically arranged inside the cavity rod 402a. 2d, the first spring 402b is located inside the second spring 402c and the extrusion plate 402d, the extrusion plate 401 has a circular surface 401c, a convex surface 401d and a concave surface 401e, when one end of the linkage rod 403 is located at the position of the circular surface 401c, the first spring 402b is located in the spatial position inside the second spring 402c and the extrusion plate 402d, at this time the sprinkler head 203 is in a vertical state, when one end of the linkage rod 403 is located at the convex surface 401d. 1d, the linkage rod 403 first moves toward the position close to the sprinkler head 203, the first spring 402b squeezes the extrusion plate 402d, and the sprinkler head 203 deflects to the left. After moving to the peak of the convex surface 401d, it immediately moves to the left until the sprinkler head 203 is in a vertical position and can enter the position of the concave surface 401e. When moving toward the position of the trough of the concave surface 401e, the linkage rod 403 moves toward the position away from the sprinkler head 203, driving the first spring 402b to move left to squeeze the second spring 402c, causing the sprinkler head 203 to deflect to the right. When the linkage rod 403 leaves the position of the trough of the concave surface 401e, the sprinkler head 203 will move to the right until it is vertical. At this time, the linkage rod 403 enters the position of the circular surface 401c and sprays vertically downward, thereby increasing the contact area between the oxidant and the flue gas and improving the oxidation effect.

[0041] Among them, one end of the linkage rod 403 is connected to the fitting plate 404, one side of the fitting plate 404 is fixedly connected to the limiting block 405, the surface of the extrusion disk 401 is provided with a track groove 406, the limiting block 405 is slidably connected to the inside of the track groove 406, and the limiting block 405 and the track groove 406 are both arranged in a convex shape, which can make the linkage rod 403 and the extrusion disk 401 tightly connected to avoid separation between the two.

[0042] Furthermore, it also includes a rotating mechanism 600, which includes a mounting groove 601 opened on the top of the extrusion disk 401, the spray head 203 is arranged in the mounting groove 601, and the surface of the spray head 203 is connected to a connecting rod 602, and the connecting rod 602 is rotatably connected to the extrusion disk 401. By setting the connecting rod 602, the spray head 203 can be deflected left and right inside the mounting groove 601.

[0043] Operation process: When in use, the motor 304 is turned on to drive the reciprocating screw 302 to rotate. Under the anti-rotation effect of the limit rod 303, the receiving plate 301 can be made to reciprocate up and down along the reciprocating screw 302, thereby driving the spray head 203 to move synchronously. By lifting and spraying, the contact area between the oxidant and the flue gas is increased, and the flue gas is fully oxidized. At the same time, the reciprocating screw 302 will drive the extrusion plate 401 to rotate when it rotates. The circular surface 401c, the convex surface 401d, and the concave surface 401e on the extrusion plate 401 are respectively in contact with the bonding plate 404, so that the bonding plate 404 can drive the spray head 203 to make a left and right deflection reciprocating motion, which in turn can increase the spraying area of the oxidant and improve the oxidation effect.

[0044] Example 2

[0045] Reference Figure 2 and Figure 4 , which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a spray mechanism; it also includes a retracting mechanism 500, which includes a mounting plate 501 mounted on the top of the inner cavity of the barrel body 100, a rotating rod 502 rotatably connected to the mounting plate 501, a reeling sleeve 503 mounted on the surface of the rotating rod 502, and a limiting plate 504 connected to one end of the rotating rod 502. A cavity sleeve 505 is mounted on one side of the mounting plate 501. The inner cavity of the cavity sleeve 505 is provided with a torsion spring 506. The two ends of the torsion spring 506 are respectively connected to the surface of the rotating rod 502 and the cavity The inner wall of the sleeve 505 is connected; the reciprocating screw rod 302 is wound around the surface of the winding sleeve 503. When the spray head 203 moves downward, the water pipe 202 wound on the winding sleeve 503 will be unwound. During unwinding, the water pipe 202 will drive the winding sleeve 503 and the rotating rod 502 to rotate, and at the same time compress the cavity sleeve 505. When the spray head 203 moves upward, under the action of the restoring force of the torsion spring 506, the water pipe 202 can be automatically reeled, avoiding the situation where the water pipe 202 is too long and causes clutter during the up and down movement of the spray head 203.

[0046] Furthermore, one end of the water pipe 202 passes through the mounting plate 501 and the barrel body 100, and one end of the rotating rod 502 passes through the cavity sleeve 505. A fixing groove 508 is provided on one side of the mounting plate 501 to facilitate the connection between the water pipe 202 and the water tank 201. An embedding groove is provided on one side of the mounting plate 501, and a bearing 507 is installed inside the embedding groove. The bearing 507 is fixedly connected to the rotating rod 502. By setting the bearing 507, the rotating rod 502 can rotate more stably.

[0047] The rest of the structure is the same as that of Example 1.

[0048] Operation process: When the sprinkler head 203 moves downward, the water pipe 202 wound on the winding sleeve 503 will be unwound. During unwinding, the water pipe 202 will drive the winding sleeve 503 and the rotating rod 502 to rotate, and at the same time, the cavity sleeve 505 will be compressed. When the sprinkler head 203 moves upward, under the action of the restoring force of the torsion spring 506, the water pipe 202 can be automatically reeled, avoiding the situation where the water pipe 202 is too long and causes chaos during the up and down movement of the sprinkler head 203.

[0049] Example 3

[0050] Reference Figures 7-9 , which is the third embodiment of the present utility model. Different from the previous embodiment, this embodiment provides a pre-oxidation device, including a spraying mechanism and a circulation mechanism 700. The circulation mechanism 700 includes a first connecting pipe 701 connected to the barrel body 100, a collecting barrel 702 installed at one end of the first connecting pipe 701, a water pump 703 installed on the top of the collecting barrel 702, and a circulation pipe 704 connected to the water pump 703. The water pump 703 is connected to the water tank 201 through the circulation pipe 704. A second connecting pipe 705 is provided inside the collecting barrel 702, and one end of the second connecting pipe 705 is connected to the water pump 703. The spray liquid generated after spraying enters the collecting barrel 702 through the first connecting pipe 701, and then the spray liquid in the collecting barrel 702 can be transported to the water tank 201 for recycling through the second connecting pipe 705, the water pump 703 and the circulation pipe 704.

[0051] Furthermore, a support rod 706 is fixedly connected to the bottom of the collection barrel 702 , and a support plate 707 is fixedly connected to the bottom end of the support rod 706 . The collection barrel 702 can be supported by arranging the support rod 706 and the support plate 707 .

[0052] In addition, a third connecting pipe 800 is connected to the surface of the barrel body 100, one end of the third connecting pipe 800 is connected to the tower body 900, and a smoke outlet is provided on the top of the tower body 900, which can perform secondary treatment and discharge on the flue gas after spraying treatment by the barrel body 100. It belongs to the existing technology and has been disclosed by the Chinese Utility Model No. CN218553633U, so it will not be elaborated here.

[0053] The rest of the structure is the same as that of Example 1 or 2.

[0054] Operation process: The spray liquid generated after spraying enters the collection barrel 702 through the first connecting pipe 701, and then the spray liquid in the collection barrel 702 can be transported to the water tank 201 for recycling through the second connecting pipe 705, the water pump 703 and the circulation pipe 704.

[0055] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0056] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0057] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A spray mechanism, characterized in that: include, The barrel (100) has a smoke inlet pipe (101) mounted on its surface; A spray mechanism (200) comprising a water tank (201) mounted on the top of the barrel (100), a water pipe (202) connected to the water tank (201), and a spray head (203) connected to one end of the water pipe (202); A height adjustment mechanism (300) comprises a receiving plate (301) disposed in the inner cavity of the barrel (100), a reciprocating screw (302) threadedly connected to the receiving plate (301), and a limiting rod (303) rotatably connected to the receiving plate (301); An angle adjustment mechanism (400) comprises an extrusion disc (401) threadedly connected to the reciprocating screw (302), an elastic component (402) mounted on the top of the receiving plate (301), and a linkage rod (403) movably connected to the elastic component (402); the spray head (203) is movably connected to the inside of the receiving plate (301); one end of the linkage rod (403) is connected to the spray head (203), and the other end of the linkage rod (403) is in contact with the extrusion disc (401).

2. The spray mechanism according to claim 1, wherein: The bottom of the extrusion disc (401) is connected to a limiting ring (401a), the top of the receiving plate (301) is provided with an annular groove (401b), and the limiting ring (401a) is slidably connected to the inside of the annular groove (401b).

3. The spray mechanism according to claim 2, wherein: The elastic component (402) includes a cavity rod (402a), a first spring (402b), a second spring (402c) and an extrusion plate (402d), wherein the cavity rod (402a) is installed on the top of the receiving plate (301), and the linkage rod (403) and the cavity rod (402a) are movably connected, and the first spring (402b) is slidably connected to the interior of the cavity rod (402a) and connected to the surface of the linkage rod (403), and the second spring (402c) and the extrusion plate (402d) are symmetrically arranged inside the cavity rod (402a), and the first spring (402b) is located on the inner side of the second spring (402c) and the extrusion plate (402d).

4. The spray mechanism according to claim 2 or 3, characterized in that: One end of the linkage rod (403) is connected to a bonding plate (404), one side of the bonding plate (404) is fixedly connected to a limiting block (405), a track groove (406) is provided on the surface of the extrusion disk (401), and the limiting block (405) is slidably connected to the inside of the track groove (406).

5. The spray mechanism according to claim 1, wherein: The invention also includes a retracting and releasing mechanism (500), which includes a mounting plate (501) mounted on the top of the inner cavity of the barrel body (100), a rotating rod (502) rotatably connected to the mounting plate (501), a reeling sleeve (503) mounted on the surface of the rotating rod (502), and a limiting plate (504) connected to one end of the rotating rod (502), a cavity sleeve (505) is mounted on one side of the mounting plate (501), and a torsion spring (506) is provided in the inner cavity of the cavity sleeve (505), and the two ends of the torsion spring (506) are respectively connected to the surface of the rotating rod (502) and the inner wall of the cavity sleeve (505).

6. The spray mechanism according to claim 5, wherein: The reciprocating screw rod (302) is wound around the surface of the winding sleeve (503), one end of the water pipe (202) passes through the mounting plate (501) and the barrel (100), and one end of the rotating rod (502) passes through the cavity sleeve (505).

7. The spray mechanism according to claim 1, wherein: The invention also includes a rotating mechanism (600), which includes a mounting groove (601) opened on the top of the extrusion disk (401), the spray head (203) is arranged in the mounting groove (601), and the surface of the spray head (203) is connected to a connecting rod (602), and the connecting rod (602) and the extrusion disk (401) are rotatably connected.

8. A pre-oxidation device, characterized in that: It comprises the spray mechanism described in any one of claims 6 to 7, and a circulation mechanism (700), wherein the circulation mechanism (700) comprises a first connecting pipe (701) connected to the barrel body (100), a collecting barrel (702) installed at one end of the first connecting pipe (701), a water pump (703) installed on the top of the collecting barrel (702), and a circulation pipe (704) connected to the water pump (703).

9. The pre-oxidation device according to claim 8, characterized in that: The water pump (703) is connected to the water tank (201) via the circulation pipe (704), and a second connecting pipe (705) is provided inside the collection barrel (702), and one end of the second connecting pipe (705) is connected to the water pump (703).

10. The pre-oxidation device according to claim 8 or 9, characterized in that: The bottom of the collection bucket (702) is fixedly connected to a support rod (706), and the bottom end of the support rod (706) is fixedly connected to a support plate (707).

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