A formaldehyde oxidizer to prevent dry burning

Abstract

The present invention provides an anti-dry burning formaldehyde oxidizer, and relates to the technical field of formaldehyde oxidizers. The anti-dry burning formaldehyde oxidizer comprises a body, a top cover is fixed to the top of the body by bolts, and a feeding pipe is fixed to the top cover, a bottom cover is fixed to the bottom of the body by bolts, and a discharge pipe is fixed to the bottom cover, an inner ring frame is installed between the body and the top cover, a reaction structure is arranged on the inner ring frame, an inner bracket is fixed to the middle of the body, an upper fixed seat is fixed to the upper part of the body, a lower fixed seat is fixed to the lower part of the body, and a cooling structure is arranged between the upper fixed seat and the lower fixed seat. The anti-dry burning formaldehyde oxidizer can pour a mixture of methanol gas, air and batch steam onto the reaction structure through the feeding pipe and generate formaldehyde gas, the gas can be quickly cooled and cooled by the cooling structure, and the heat exchange tube can be prevented from being damaged by dry burning.

Description

Technical Field

[0001] The invention relates to the technical field of formaldehyde oxidizers, in particular to an anti-dry burning formaldehyde oxidizer. Background Art

[0002] Formaldehyde oxidizer is one of the main equipment for producing formaldehyde. The production methods of formaldehyde mainly include silver method and iron-molybdenum method. In the oxidation reaction of silver method to produce formaldehyde, the reaction temperature is high, which makes the product temperature also high. Usually, the product temperature is reduced from 650℃ to below 200℃ in the rapid cooling section. The rapid cooling section is actually a heat exchanger, which requires the product to be cooled quickly.

[0003] The patent with application number CN201921160733.6 discloses a high-efficiency formaldehyde oxidizer, including a first cylinder, a second cylinder, a third cylinder and a fourth cylinder connected in sequence, a reaction gas inlet is arranged on the first cylinder, the second cylinder includes a reaction chamber, a first cooling chamber and a second cooling chamber, a formaldehyde outlet is arranged on the third cylinder, a first sewage outlet is arranged on the fourth cylinder, a first tube sheet is arranged between the reaction chamber and the first cooling chamber, a second tube sheet is arranged between the first cooling chamber and the second cooling chamber, an ignition port and a first temperature measuring port are arranged on the wall of the reaction chamber, a catalyst layer, a copper mesh and a sieve plate are arranged in the reaction chamber, a fin tube is arranged in the first cooling chamber, cooling water is arranged in the fin tube, the fin tube passes through the first cooling chamber, the second tube sheet, the second cooling chamber and the third cylinder in sequence, a sleeve and cooling water are arranged in the second cooling chamber, the sleeve is arranged on the fin tube, and the second cooling medium is located outside the sleeve;

[0004] When the above patented structure is in use, the size of the finned tube is fixed and cannot be deformed. However, due to the high product temperature, thermal stress may cause the heat exchange tube to be torn, causing dry burning of the heat exchange tube, and even burning and cracking in severe cases, causing unnecessary losses. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides an anti-dry burning formaldehyde oxidizer, which solves the problem that the heat exchange tubes of the formaldehyde oxidizer cannot be prevented from dry burning.

[0007] (II) Technical solution

[0008] In order to achieve the purpose of preventing the heat exchange tube of the above formaldehyde oxidizer from dry burning, the present invention is implemented through the following technical scheme: an anti-dry burning formaldehyde oxidizer, comprising a body, a top cover is fixed to the top of the body by bolts, and a feeding pipe is fixed to the top cover, a bottom cover is fixed to the bottom of the body by bolts, and a discharge pipe is fixed to the bottom cover, an inner ring frame is installed between the body and the top cover, a reaction structure is arranged on the inner ring frame, an inner bracket is fixed to the middle of the body, an upper fixed seat is fixed to the upper part of the body, a lower fixed seat is fixed to the lower part of the body, and a cooling structure is arranged between the upper fixed seat and the lower fixed seat;

[0009] The body includes a cooling fan and an external bracket, the cooling fan is installed on one side of the body surface, the external bracket is installed on the other side of the body surface, a cooling pump is installed inside the external bracket, a guide pipe is installed on the cooling pump, a motor is installed inside the internal bracket, and a driving gear ring is fixed to the output end of the motor.

[0010] Preferably, the reaction structure includes a filter, a catalytic reaction plate and a base plate, the filter is installed in the middle of the inner ring frame, the catalytic reaction plate is installed in the upper part of the inner ring frame, the base plate is installed at the bottom of the inner ring frame, a gas distributor is installed on the bottom surface of the inner ring frame, and an air duct is installed on the gas distributor.

[0011] Preferably, the filter screen, the catalytic reaction plate and the bottom plate are arranged on the inner ring frame from top to bottom, and the catalytic reaction plate is provided with ventilation holes.

[0012] Preferably, an upper ring tube is fixed inside the upper fixed seat, an air inlet pipe is fixed on the end surface of the upper fixed seat, a liquid inlet pipe is fixed on the upper ring tube, a lower ring tube is fixed inside the lower fixed seat, a liquid outlet pipe is fixed on the lower ring tube, and an air outlet pipe is fixed on the end surface of the lower fixed seat.

[0013] Preferably, the bottom end of the air guide pipe is fixedly connected to the air inlet pipe, the bottom end of the air inlet pipe extends to below the upper fixed seat, and the liquid inlet pipe is fixedly connected to the top end of the guide pipe.

[0014] Preferably, the top end of the liquid outlet pipe extends to above the lower fixed seat, and the lower ring pipe is fixedly connected to the bottom end of the guide pipe.

[0015] Preferably, the cooling structure includes a T-shaped groove, which is provided on the lower surface of the upper fixed seat and the upper surface of the lower fixed seat, a T-shaped swivel is provided inside the T-shaped groove for rotation, a driven gear ring is fixed on the T-shaped swivel, and the driven gear ring is meshed with the driving gear ring, a side ring groove is provided on the inner surface of the driven gear ring, and arc grooves are provided on the upper and lower surfaces of the side ring groove, rectangular grooves are provided on the upper and lower fixed seats, rectangular blocks are slid inside the rectangular grooves, an adjustment plate is fixed between the upper and lower groups of the rectangular blocks, a push-pull rod is fixed on the outer surface of the adjustment plate, a sliding pin is rotated on the outer end of the push-pull rod, a toothed folding sheet is fixed between the two adjacent groups of the adjustment plates, a heat exchange tube is fixed between the upper and lower fixed seats, and a fin is fixed between the toothed folding sheet and the heat exchange tube.

[0016] Preferably, the driven gear ring is rotatably connected to the upper fixed seat and the lower fixed seat respectively through a T-shaped rotating groove and a T-shaped rotating ring, the arc groove is not cocentric with the driven gear ring, the push-pull rod extends to the inside of the side ring groove, and the sliding pin is slidably connected to the arc groove.

[0017] Preferably, the upper and lower ends of the adjustment plate are slidably connected to the upper fixed seat and the lower fixed seat respectively through a rectangular groove and a rectangular block, the adjustment plate and the toothed folding sheet are arranged in a circular staggered manner, the adjustment plate and the toothed folding sheet form a telescopic ring tube, and the upper and lower ends of the telescopic ring tube are in contact with the end faces of the upper fixed seat and the lower fixed seat respectively, the air inlet pipe and the air outlet pipe extend into the heat exchange tube, and the liquid inlet pipe and the liquid outlet pipe extend into the cavity between the telescopic ring tube and the heat exchange tube.

[0018] Preferably, the heat exchange tube is in a wave shape, the fin is in an S shape, and both ends of the fin are fixedly connected to the toothed folded sheet and the heat exchange tube respectively.

[0019] (III) Beneficial effects

[0020] The present invention provides a formaldehyde oxidizer for preventing dry burning. It has the following beneficial effects:

[0021] 1. The gas distributor can evenly distribute the gas to the heat exchange tubes at different positions through the gas guide pipe and the air inlet pipe, so that the gas can be evenly diverted, so that the gas flows from top to bottom inside the heat exchange tube, so that the gas diverted inside the heat exchange tube can be cooled and cooled separately later.

[0022] 2. When the gas flows inside the heat exchange tube, the heat can be transferred to the inside of the machine body through the heat exchange tube and the fins. The heat inside the machine body can be discharged by the cooling fan, and the coolant can be used to cool the serrated folded sheets, fins and heat exchange tubes to improve the heat exchange capacity of the serrated folded sheets, fins and heat exchange tubes.

[0023] 3. When the gas enters the heat exchange tube, the heat exchange tube tends to expand and deform due to heat, and generates an outward radial thrust on the coolant inside the telescopic ring tube. When the telescopic ring tube composed of the adjusting plate and the toothed folded sheet contracts, it can generate an inward radial pressure on the coolant inside, so that the coolant can stick to the surface of the heat exchange tube. The coolant can generate a reverse force on the heat exchange tube and cool the heat exchange tube to avoid deformation of the heat exchange tube due to thermal stress, cracking or even dry burning damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a partial cross-sectional view of the structure of the present invention;

[0026] Figure 3 For the present invention Figure 2 A partial enlarged schematic diagram of the structure at center A;

[0027] Figure 4 It is a partial cross-sectional view of the seat on the structure of the present invention;

[0028] Figure 5 This is a top view of the lower seat of the structure of the present invention;

[0029] Figure 6 For the present invention Figure 5 A partial enlarged schematic diagram of the structure at B in the middle;

[0030] Figure 7 It is a partial cross-sectional view of the heat exchange tube structure of the present invention;

[0031] Figure 8 For the present invention Figure 7 A partial enlarged schematic diagram of the structure at point C in the middle.

[0032] Among them, 1, body; 101, cooling fan; 102, outer bracket; 103, cooling pump; 104, guide tube; 2, top cover; 201, feeding pipe; 3, bottom cover; 301, discharge pipe; 4, inner ring frame; 401, filter screen; 402, catalytic reaction plate; 403, bottom plate; 404, gas distributor; 405, air guide tube; 5, inner bracket; 501, motor; 502, drive gear ring; 6, upper fixed seat; 601, upper ring pipe; 602, inlet Air pipe; 603, liquid inlet pipe; 7, lower fixed seat; 701, lower ring pipe; 702, liquid outlet pipe; 703, air outlet pipe; 8, cooling structure; 801, T-shaped rotating groove; 802, T-shaped rotating ring; 803, driven gear ring; 804, side ring groove; 805, arc groove; 806, rectangular groove; 807, rectangular block; 808, adjustment plate; 809, push-pull rod; 810, sliding pin; 811, toothed folding sheet; 812, heat exchange tube; 813, fin. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and embodiments. In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] See also Figure 1-Figure 8 The present invention provides a technical solution: an anti-dry burning formaldehyde oxidizer, comprising a body 1, a top cover 2 is fixed to the top of the body 1 by bolts, and a feeding pipe 201 is fixed to the top cover 2, a bottom cover 3 is fixed to the bottom of the body 1 by bolts, and a discharge pipe 301 is fixed to the bottom cover 3, an inner ring frame 4 is installed between the body 1 and the top cover 2, a reaction structure is arranged on the inner ring frame 4, an inner bracket 5 is fixed to the middle of the body 1, an upper fixed seat 6 is fixed to the upper part of the body 1, a lower fixed seat 7 is fixed to the lower part of the body 1, and a cooling structure 8 is arranged between the upper fixed seat 6 and the lower fixed seat 7;

[0035] The body 1 includes a heat dissipation fan 101 and an outer bracket 102. The heat dissipation fan 101 is installed on one side of the surface of the body 1, and the outer bracket 102 is installed on the other side of the surface of the body 1. A cooling pump 103 is installed inside the outer bracket 102, and a guide pipe 104 is installed on the cooling pump 103. A motor 501 is installed inside the inner bracket 5, and a driving gear ring 502 is fixed to the output end of the motor 501. After the methanol gas, air and ingredient steam mixture are poured onto the catalytic reaction plate 402 through the feeding pipe 201, the feeding pipe 201 is closed with a sealing cover. The gas generated by the reaction escapes downward through the through hole set on the catalytic reaction plate 402 and is absorbed by the gas distributor 404. In this process, impurities in the gas can be filtered through the filter 401, so that the gas can be cooled and lowered later.

[0036] In this embodiment, the reaction structure includes a filter screen 401, a catalytic reaction plate 402 and a bottom plate 403, the filter screen 401 is installed in the middle of the inner ring frame 4, the catalytic reaction plate 402 is installed in the upper part of the inner ring frame 4, the bottom plate 403 is installed at the bottom of the inner ring frame 4, and a gas distributor 404 is installed on the bottom surface of the inner ring frame 4, and a gas guide pipe 405 is installed on the gas distributor 404;

[0037] For details, please refer to the attached manual. Figure 3 As shown, when the reaction mixture is poured onto the catalytic reaction plate 402 for reaction, the generated gas escapes downward from the catalytic reaction plate 402 , is filtered by the filter 401 , enters above the bottom plate 403 , and is absorbed by the gas distributor 404 .

[0038] In this embodiment, the filter screen 401, the catalytic reaction plate 402 and the bottom plate 403 are arranged from top to bottom on the inner ring frame 4, and the catalytic reaction plate 402 is provided with a vent hole;

[0039] Specifically, the gas generated by the reaction on the catalytic reaction plate 402 can escape downward through the vent holes on the catalytic reaction plate 402, and the filter screen 401 can filter the impurities in the gas after the reaction.

[0040] In this embodiment, an upper ring tube 601 is fixed inside the upper seat 6, an air inlet pipe 602 is fixed on the end surface of the upper seat 6, a liquid inlet pipe 603 is fixed on the upper ring tube 601, a lower ring tube 701 is fixed inside the lower seat 7, a liquid outlet pipe 702 is fixed on the lower ring tube 701, and an air outlet pipe 703 is fixed on the end surface of the lower seat 7;

[0041] For details, please refer to the attached manual. Figure 4 And the instruction manual Figure 8 As shown, the coolant inside the upper ring tube 601 can enter the telescopic ring tube composed of the adjustment plate 808 and the toothed folding sheet 811 through the liquid inlet pipe 603, and the coolant inside the telescopic ring tube enters the lower ring tube 701 through the liquid outlet pipe 702, so that the coolant can circulate in the closed loop formed by the cooling pump 103, the guide pipe 104, the upper ring tube 601, the liquid inlet pipe 603, the telescopic ring tube, the liquid outlet pipe 702 and the lower ring tube 701.

[0042] In this embodiment, the bottom end of the air guide pipe 405 is fixedly connected to the air inlet pipe 602, the bottom end of the air inlet pipe 602 extends to the bottom of the upper fixed seat 6, and the liquid inlet pipe 603 is fixedly connected to the top end of the guide pipe 104;

[0043] Specifically, the gas distributor 404 can transport the gas to the heat exchange tube 812 through the air guide pipe 405 and the air inlet pipe 602, so that the gas flows from top to bottom inside the heat exchange tube 812, and the gas inside the heat exchange tube 812 can be discharged from the air outlet pipe 703.

[0044] In this embodiment, the top end of the liquid outlet pipe 702 extends to the top of the lower fixed seat 7, and the lower ring pipe 701 is fixedly connected to the bottom end of the guide pipe 104;

[0045] Specifically, the coolant inside the telescopic ring tube can be transported to the lower ring tube 701 through the liquid outlet pipe 702 , and the coolant inside the lower ring tube 701 can flow back to the cooling pump 103 again through the guide pipe 104 below.

[0046] In this embodiment, the cooling structure 8 includes a T-shaped rotating groove 801, which is provided on the lower side surface of the upper fixed seat 6 and the upper side surface of the lower fixed seat 7. A T-shaped rotating ring 802 is rotated inside the T-shaped rotating groove 801, and a driven gear ring 803 is fixed on the T-shaped rotating ring 802, and the driven gear ring 803 is meshed with the driving gear ring 502. A side ring groove 804 is provided on the inner side surface of the driven gear ring 803, and an arc groove 805 is provided on the upper and lower surfaces of the side ring groove 804. The upper fixed seat 6 and the lower fixed seat 7 is provided with a rectangular groove 806, a rectangular block 807 is slidably arranged inside the rectangular groove 806, an adjusting plate 808 is fixed between the upper and lower sets of rectangular blocks 807, a push-pull rod 809 is fixed to the outer surface of the adjusting plate 808, a sliding pin 810 is rotatably arranged at the outer end of the push-pull rod 809, a toothed folding sheet 811 is fixed between two adjacent sets of adjusting plates 808, a heat exchange tube 812 is fixed between the upper fixed seat 6 and the lower fixed seat 7, and a fin 813 is fixed between the toothed folding sheet 811 and the heat exchange tube 812;

[0047] For details, please refer to the attached manual. Figure 8 As shown, a telescopic ring tube can be formed by adjusting the plate 808 and the toothed folding sheet 811, and the telescopic ring tube is located on the outside of the heat exchange tube 812, and the driven gear ring 803 is located on the outside of the telescopic ring tube. A cavity is left between the telescopic ring tube and the heat exchange tube 812, so that the upper ring tube 601 can transport the coolant to the telescopic ring tube through the liquid inlet pipe 603, and perform heat exchange on the heat exchange tube 812, so that the heat exchange tube 812 can cool down the gas inside it, and after the coolant inside the telescopic ring tube cools down the heat exchange tube 812, it can enter the lower ring tube 701 through the liquid outlet pipe 702, and the coolant inside the lower ring tube 701 flows back to the cooling pump 103 again through the guide pipe 104, so that the coolant can circulate inside the telescopic ring tube and continuously cool down the heat exchange tube 812.

[0048] In this embodiment, the driven gear ring 803 is rotatably connected to the upper fixed seat 6 and the lower fixed seat 7 through the T-shaped rotating groove 801 and the T-shaped rotating ring 802 respectively, the arc groove 805 is not cocentric with the driven gear ring 803, the push-pull rod 809 extends to the inside of the side ring groove 804, and the sliding pin 810 is slidably connected to the arc groove 805;

[0049] Specifically, the driven gear ring 803 can be supported for rotation by the T-shaped rotating groove 801 and the T-shaped rotating ring 802, so that the driven gear ring 803 can rotate on the upper fixed seat 6 and the lower fixed seat 7. When the driven gear ring 803 rotates, the rectangular groove 806 and the rectangular block 807 guide the adjustment plate 808, so that the arc groove 805 can drive the adjustment plate 808 to move through the push-pull rod 809 and the sliding pin 810, thereby enabling the telescopic ring tube to extend or contract.

[0050] In this embodiment, the upper and lower ends of the adjustment plate 808 are respectively slidably connected with the upper fixed seat 6 and the lower fixed seat 7 through the rectangular groove 806 and the rectangular block 807, the adjustment plate 808 and the toothed folding sheet 811 are arranged in a circular staggered manner, the adjustment plate 808 and the toothed folding sheet 811 form a telescopic ring tube, and the upper and lower ends of the telescopic ring tube are respectively in contact with the end surfaces of the upper fixed seat 6 and the lower fixed seat 7, the air inlet pipe 602 and the air outlet pipe 703 extend into the heat exchange tube 812, and the liquid inlet pipe 603 and the liquid outlet pipe 702 extend into the cavity between the telescopic ring tube and the heat exchange tube 812;

[0051] Specifically, the rectangular groove 806 and the rectangular block 807 can be used to guide and move the adjustment plate 808. When the telescopic ring tube is extended or contracted, it can be slidably connected with the end faces of the upper fixed seat 6 and the lower fixed seat 7, so that the upper fixed seat 6 and the lower fixed seat 7 can be sealed from the upper and lower ports of the telescopic ring tube on the upper and lower sides, so that the telescopic ring tube forms a sealed ring tube so that the coolant can flow inside it.

[0052] In this embodiment, the heat exchange tube 812 is in a wave shape, the fin 813 is in an S shape, and the two ends of the fin 813 are fixedly connected to the toothed folded sheet 811 and the heat exchange tube 812 respectively;

[0053] Specifically, when the telescopic ring tube is extended or contracted, the serrated folded sheet 811 can be extended or contracted and deformed. When the telescopic ring tube is filled with coolant, the fins 813 can exert a certain pulling force on the serrated folded sheet 811 to prevent the coolant from exerting pressure on the serrated folded sheet 811 and causing it to deform. The adjustment plate 808 is made of a metal heat-conducting material, and the serrated folded sheet 811 is made of a deformable high-temperature alloy. The deformable high-temperature alloy refers to an alloy that can be subjected to hot and cold deformation processing. The operating temperature range is -253 to 1320°C. It not only has high high-temperature strength, good oxidation resistance, corrosion resistance and thermal conductivity, but also has good fatigue performance, plasticity, long-term tissue stability, high purity and reliability of use. It is widely used in aerospace, aviation, nuclear energy and petroleum industries.

[0054] The working principle and use process of the present invention are as follows: after the methanol gas, air and ingredient steam mixture are poured onto the catalytic reaction plate 402 through the feeding pipe 201, the feeding pipe 201 is closed with a sealing cover, and the gas generated by the reaction escapes downward through the air vents arranged on the catalytic reaction plate 402 and is absorbed by the gas distributor 404. During this process, the impurities in the gas can be filtered through the filter 401, and the gas inside the gas distributor 404 can be evenly distributed to the heat exchange tubes 812 at different positions through the air guide pipe 405 and the air inlet pipe 602, so that the gas can be evenly diverted, so that part of the gas diverted inside the heat exchange tube 812 can be cooled separately, so that the gas flows from top to bottom inside the heat exchange tube 812, and the heat exchange tube The gas inside 812 enters the bottom cover 3 through the outlet pipe 703 and is discharged from the discharge pipe 301. In this process, heat can be transferred to the inside of the body 1 through the heat exchange tube 812 and the fins 813, and the heat inside the body 1 can be discharged by the cooling fan 101. In the process of gas flowing from top to bottom in the heat exchange tube 812, the cooling pump 103 transports the coolant to the upper ring tube 601 through the upper guide tube 104, and the coolant inside the upper ring tube 601 can be transported to the telescopic ring tube composed of the adjustment plate 808 and the toothed folding sheet 811 through the liquid inlet pipe 603, and the coolant fills the telescopic ring tube. After the telescopic ring tube is filled with coolant, it enters the lower ring tube 701 through the outlet pipe 702 and passes through the lower guide tube 104 flows back into the cooling pump 103 again, so that the coolant can circulate, and after the coolant enters the telescopic ring tube, it can cool the heat exchange tube 812, so that the heat exchange tube 812 can be quickly heat exchanged, and the heat exchange tube 812 can quickly cool the gas inside it. When the gas enters the heat exchange tube 812 and heats the heat exchange tube 812, the wavy heat exchange tube 812 tends to expand and deform, and generates an outward radial thrust on the coolant inside the telescopic ring tube. At the same time, the starting motor 501 drives the driving gear ring 502 to rotate, and the driving gear ring 502 can drive the driven gear ring 803 to rotate, and the rectangular groove 806 and the rectangular block 807 guide the radial direction of the adjusting plate 808, so that the driven gear ring 8 03 During rotation, the arc groove 805 can drive the sliding pin 810 and the push-pull rod 809 to move inward, and then the push-pull rod 809 can drive the adjustment plate 808 to move inward and shrink the telescopic ring tube. At this time, the toothed folding sheet 811 shrinks and folds. When the telescopic ring tube shrinks, it can generate an inward radial pressure on the coolant inside it, so that the coolant can be close to the surface of the heat exchange tube 812. Therefore, the coolant can generate a reverse force on the heat exchange tube 812 while also cooling the heat exchange tube 812. By setting the heat exchange tube 812 into a wave shape, the thermal expansion difference of the wall temperature of the heat exchange tube 812 at different temperatures can be compensated, and the axial or radial load on the heat exchange tube 812 can be reduced, thereby reducing the temperature difference stress of the heat exchange tube 812.Avoid causing strength damage, causing the outer wall of the heat exchange tube 812 to crack, and the coolant is always filled in the telescopic ring tube, and is subjected to the inward pressure of the telescopic ring tube, so that the coolant is tightly attached to the outer wall of the heat exchange tube 812, avoiding the heat exchange tube 812 from being deformed due to thermal stress, cracking or even dry burning damage.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry burning prevention formaldehyde oxidizer, comprising a body (1), characterized in that: A top cover (2) is fixed to the top of the machine body (1) by bolts, and a feeding pipe (201) is fixed to the top cover (2); a bottom cover (3) is fixed to the bottom of the machine body (1) by bolts, and a discharge pipe (301) is fixed to the bottom cover (3); an inner ring frame (4) is installed between the machine body (1) and the top cover (2), and a reaction structure is arranged on the inner ring frame (4); an inner bracket (5) is fixed to the middle of the machine body (1); an upper fixed seat (6) is fixed to the upper part of the machine body (1), and a lower fixed seat (7) is fixed to the lower part of the machine body (1); a cooling structure (8) is arranged between the upper fixed seat (6) and the lower fixed seat (7); The machine body (1) comprises a heat dissipation fan (101) and an outer bracket (102); the heat dissipation fan (101) is mounted on one side of the surface of the machine body (1); the outer bracket (102) is mounted on the other side of the surface of the machine body (1); a cooling pump (103) is mounted inside the outer bracket (102); a flow guide pipe (104) is mounted on the cooling pump (103); a motor (501) is mounted inside the inner bracket (5); a driving gear ring (502) is fixed to the output end of the motor (501).

2. The anti-dry burning formaldehyde oxidizer according to claim 1, characterized in that: The reaction structure comprises a filter screen (401), a catalytic reaction plate (402) and a bottom plate (403), wherein the filter screen (401) is mounted in the middle of an inner ring frame (4), the catalytic reaction plate (402) is mounted on the upper part of the inner ring frame (4), the bottom plate (403) is mounted on the bottom of the inner ring frame (4), a gas distributor (404) is mounted on the bottom surface of the inner ring frame (4), and a gas guide pipe (405) is mounted on the gas distributor (404).

3. The anti-dry burning formaldehyde oxidizer according to claim 2, characterized in that: The filter screen (401), the catalytic reaction plate (402) and the bottom plate (403) are arranged on the inner ring frame (4) from top to bottom, and a vent hole is provided on the catalytic reaction plate (402).

4. The anti-dry burning formaldehyde oxidizer according to claim 2, characterized in that: An upper ring tube (601) is fixed inside the upper fixed seat (6), an air inlet pipe (602) is fixed on the end surface of the upper fixed seat (6), a liquid inlet pipe (603) is fixed on the upper ring tube (601), a lower ring tube (701) is fixed inside the lower fixed seat (7), a liquid outlet pipe (702) is fixed on the lower ring tube (701), and an air outlet pipe (703) is fixed on the end surface of the lower fixed seat (7).

5. The anti-dry burning formaldehyde oxidizer according to claim 4, characterized in that: The bottom end of the air guide pipe (405) is fixedly connected to the air inlet pipe (602), the bottom end of the air inlet pipe (602) extends to below the upper fixed seat (6), and the liquid inlet pipe (603) is fixedly connected to the top end of the flow guide pipe (104).

6. The anti-dry burning formaldehyde oxidizer according to claim 4, characterized in that: The top end of the liquid outlet pipe (702) extends to the top of the lower fixed seat (7), and the lower ring pipe (701) is fixedly connected to the bottom end of the flow guide pipe (104).

7. The anti-dry burning formaldehyde oxidizer according to claim 4, characterized in that: The cooling structure (8) comprises a T-shaped rotating groove (801), wherein the T-shaped rotating groove (801) is provided on the lower surface of the upper fixed seat (6) and the upper surface of the lower fixed seat (7), wherein a T-shaped rotating ring (802) is rotatable inside the T-shaped rotating groove (801), wherein a driven gear ring (803) is fixed on the T-shaped rotating ring (802), and the driven gear ring (803) is meshed with the driving gear ring (502), wherein a side ring groove (804) is provided on the inner surface of the driven gear ring (803), wherein arc grooves (805) are provided on the upper and lower surfaces of the side ring groove (804), and wherein the upper and lower surfaces of the upper fixed seat (6) and the lower fixed seat (7) are provided with a side ring groove (804). A rectangular groove (806) is provided, a rectangular block (807) is slidably disposed inside the rectangular groove (806), an adjustment plate (808) is fixed between the upper and lower groups of the rectangular blocks (807), a push-pull rod (809) is fixed to the outer surface of the adjustment plate (808), a sliding pin (810) is rotatably disposed at the outer end of the push-pull rod (809), a toothed folding sheet (811) is fixed between two adjacent groups of the adjustment plates (808), a heat exchange tube (812) is fixed between the upper fixed seat (6) and the lower fixed seat (7), and a fin (813) is fixed between the toothed folding sheet (811) and the heat exchange tube (812).

8. The anti-dry burning formaldehyde oxidizer according to claim 7, characterized in that: The driven gear ring (803) is rotatably connected to the upper fixed seat (6) and the lower fixed seat (7) respectively through a T-shaped rotating groove (801) and a T-shaped rotating ring (802); the arc groove (805) is not cocentric with the driven gear ring (803); the push-pull rod (809) extends to the inside of the side ring groove (804); and the sliding pin (810) is slidably connected to the arc groove (805).

9. The anti-dry burning formaldehyde oxidizer according to claim 7, characterized in that: The upper and lower ends of the adjustment plate (808) are respectively slidably connected to the upper fixed seat (6) and the lower fixed seat (7) via a rectangular groove (806) and a rectangular block (807); the adjustment plate (808) and the toothed folding sheets (811) are arranged in a circular staggered manner; the adjustment plate (808) and the toothed folding sheets (811) form a telescopic ring tube; and the upper and lower ends of the telescopic ring tube are respectively in contact with the end surfaces of the upper fixed seat (6) and the lower fixed seat (7); the air inlet pipe (602) and the air outlet pipe (703) extend into the heat exchange tube (812); and the liquid inlet pipe (603) and the liquid outlet pipe (702) extend into the cavity between the telescopic ring tube and the heat exchange tube (812).

10. The anti-dry burning formaldehyde oxidizer according to claim 7, characterized in that: The heat exchange tube (812) is in a wave shape, the fin (813) is in an S shape, and both ends of the fin (813) are fixedly connected to the toothed folded sheet (811) and the heat exchange tube (812) respectively.

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