Formaldehyde evaporator

Abstract

The utility model discloses a formaldehyde evaporator which comprises a tank body, an evaporation cavity and a ventilation cavity are sequentially and independently arranged in the tank body from bottom to top, the interior of the evaporation cavity is divided into at least one heating cavity and a plurality of turbulent flow cavities in the horizontal direction through a plurality of through-flow plates, and a plurality of sets of through-flow holes are formed in the through-flow plates. The through-flow hole is used for communicating the heating cavity with the turbulent flow cavity; a gas outlet of the heating cavity is connected with a gas collector, and formaldehyde added into the evaporation cavity enters the turbulent flow cavity, then enters the heating cavity through the through-flow hole to be heated and evaporated and then enters the gas collector to be collected; a heating assembly is arranged in the heating cavity and used for heating formaldehyde. A turbulent flow assembly is mounted in the turbulent flow cavity; the ventilation cavity communicates with the outside and the turbulent flow cavity, outside airflow is introduced into the evaporation cavity through the air inducing unit in the ventilation cavity, liquid disturbance in the evaporation cavity is enhanced while evaporated formaldehyde is driven to be discharged out of the evaporation cavity, and the evaporation efficiency of the formaldehyde is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of formaldehyde production and relates to a formaldehyde evaporator. Background Art

[0002] In the process of preparing formaldehyde, in order to solve the existing problem of large energy consumption, the existing Chinese utility model patent with publication number CN211273588U discloses an evaporator for formaldehyde production, specifically, a mounting base is arranged at the middle position of the bottom of the shell, a stirring column is arranged above the mounting base, a beating rod is arranged outside the stirring column, a driving motor is arranged below the shell, an air inlet is arranged on one side of the bottom of the shell, a feed pipe is arranged on the other side of the bottom of the shell, a gas collecting plate is arranged above the stirring column, a steam inlet is arranged on one side of the gas collecting plate, and a gas collecting plate is arranged on the bottom of the shell. A ventilation duct is arranged inside the disk, a steam outlet is arranged below the ventilation duct, a number of through holes are arranged in a circular array on the gas collecting disk, a heat exchanger is installed above the gas collecting disk, a waste heat recovery duct is installed between the discharge pipe and the feed pipe, and a negative pressure fan is installed in the middle of the waste heat recovery duct to recover the heat in the methanol vapor. However, in the above-mentioned equipment, the efficiency of evaporation is low because the equipment only relies on the stirring device to drive the flow of the liquid, and the gas introduced cannot be fully mixed with the methanol liquid, making it difficult to quickly carry the formaldehyde generated at the bottom of the methanol liquid to the top for discharge. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a formaldehyde evaporator to solve the technical problems mentioned in the prior art.

[0004] A formaldehyde evaporator, comprising:

[0005] The tank body has an evaporation chamber and a ventilation chamber independently arranged in sequence from bottom to top.

[0006] A plurality of flow plates are arranged in the evaporation chamber, and the plurality of flow plates divide the evaporation chamber into at least one heating chamber and a plurality of flow-disturbing chambers in the horizontal direction. A plurality of flow holes are arranged on the flow plates, and the flow holes are used to connect the heating chamber and the flow-disturbing chamber; the gas outlet of the heating chamber is connected to the gas collector, and the formaldehyde added to the evaporation chamber enters the flow-disturbing chamber, enters the heating chamber through the flow holes, is heated and evaporated, and then enters the gas collector for collection;

[0007] The heating cavity is provided with a heating component for heating the formaldehyde; the spoiler cavity is provided with a spoiler component;

[0008] The ventilation chamber is connected to the outside and the turbulent cavity respectively. An air induction unit is installed in the ventilation chamber to introduce external airflow into the evaporation chamber, thereby driving the formaldehyde after evaporation to be discharged from the evaporation chamber and strengthening the liquid disturbance in the evaporation chamber.

[0009] Optionally, the air induction unit includes:

[0010] An induced draft fan installed at the air inlet of the ventilation chamber;

[0011] A drainage shell, the drainage shell is installed on the top of the tank body, forming a "┐"-shaped air cavity on the side of the ventilation chamber away from the air inlet, and the ventilation chamber is connected with the "┐"-shaped air cavity to form a U-shaped gas loop;

[0012] An air duct is arranged in each of the spoiler cavities, one end of the air duct is rotatably connected to the bottom of the spoiler cavity, and the other end of the air duct passes through the top of the evaporation chamber and the top of the ventilation chamber in sequence, and extends to the bottom side close to the “┐”-shaped air cavity; a rotating fan blade is installed on the outer periphery of the air duct and located in the ventilation chamber, the spoiler assembly is installed on the outer periphery of the air duct and located in the spoiler cavity, and a plurality of blowing ports are arranged on the outer periphery of the air duct and located on one side of the spoiler assembly;

[0013] An exhaust pipe is arranged on the top of the heating chamber, and an air outlet of the exhaust pipe sequentially passes through the top of the evaporation chamber, the top of the ventilation chamber and the top of the drainage shell and is connected to the air inlet of the gas collector.

[0014] Optionally, the number of spoiler components on the air guide duct is at least two.

[0015] Optionally, the spoiler assembly comprises:

[0016] An elliptical slide groove is arranged on the outer periphery of the air guide pipe, and the elliptical slide groove is arranged to be inclined downward in the horizontal direction;

[0017] A slider, the slider being slidably mounted in the elliptical slide groove;

[0018] A spoiler is sleeved on the air guide duct, the outer periphery of the spoiler is slidably mounted on the side wall of the spoiler cavity, and the sliding block is mounted on the inner periphery of the spoiler.

[0019] Optionally, a plurality of groups of sieve holes are provided on the spoiler, and center lines of the sieve holes are parallel to a center line of the air guide duct.

[0020] Optionally, sealing sleeves are respectively embedded in the top and bottom of the ventilation chamber, and the sealing sleeves are installed on the outer periphery of the air duct.

[0021] Optionally, the heating component is configured as a heat exchanger, which is installed at the bottom of the heating cavity. The liquid inlet and liquid outlet of the heat exchanger respectively penetrate the side wall of the evaporation chamber and extend to the outside of the tank body and are equipped with a connecting flange.

[0022] Optionally, a flow groove is provided between the outer periphery of the heat exchanger and the flow plate.

[0023] The beneficial effects that the utility model can produce include:

[0024] The utility model provides a formaldehyde evaporator, which accelerates the evaporation efficiency of formaldehyde by driving a spoiler component to move up and down reciprocatingly by air to disturb the methanol solution, and continuously forms a pressure difference inside the spoiler cavity, so that the methanol solution in the cavities on both sides of the flow plate continuously flows through the flow holes, thereby ensuring that the air and the methanol solution are fully mixed, and the air is squeezed to form bubbles when passing through the flow holes, and the formaldehyde vapor evaporated from the methanol solution is entrained in the bubbles and discharged into the gas collector through the exhaust pipe for collection, which helps to quickly carry the formaldehyde vapor generated at the bottom of the methanol solution to the top for discharge, and further improves the evaporation efficiency of formaldehyde compared with the previous stirring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of a formaldehyde evaporator of the utility model;

[0026] Figure 2 For the utility model Figure 1 A top view of the spoiler and the air duct;

[0027] In the figure: 1, tank body, 2, evaporation chamber, 3, ventilation chamber, 4, flow plate, 5, heating chamber, 6, spoiler chamber, 7, flow hole, 8, drainage shell, 9, "┐"-shaped air cavity, 10, air guide pipe, 11, rotating fan blade, 12, air outlet, 13, exhaust pipe, 14, gas collector, 15, elliptical slide groove, 16, slider, 17, spoiler, 18, screening hole, 19, sealing sleeve, 20, flow groove, 21, heating component, 22, feed port, 23, discharge port, 24, air inlet. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to these embodiments.

[0029] like Figure 1 and Figure 2As shown, the utility model provides a formaldehyde evaporator, including a tank body 1 and a drainage shell 8. The interior of the tank body 1 is independently provided with an evaporation chamber 2 and a ventilation chamber 3 from bottom to top. A feed inlet 22 and a discharge outlet 23 are provided on the periphery of the evaporation chamber 2. A plurality of flow plates 4 are provided in the evaporation chamber 2. The plurality of flow plates 4 divide the evaporation chamber 2 into at least one heating chamber 5 and a plurality of spoiler chambers 6 in a horizontal direction. A plurality of groups of flow holes 7 are provided on the flow plates 4. The flow holes 7 are used to connect the heating chamber 5 with the spoiler chamber 6. The air port is connected to the gas collector 14. The formaldehyde added to the evaporation chamber 2 enters the turbulence cavity 6 and then enters the heating cavity 5 through the flow hole 7 for heating and evaporation, and then enters the gas collector 14 for collection. A heating component 21 is arranged in the heating cavity 5 for heating the formaldehyde. A turbulence component is installed in the turbulence cavity 6. The ventilation chamber 3 is respectively connected with the outside and the turbulence cavity 6. An air induction unit is installed in the ventilation chamber 3 for introducing the outside airflow into the evaporation chamber 2, so as to drive the formaldehyde out of the evaporation chamber 2 after evaporation and strengthen the liquid disturbance in the evaporation chamber 2.

[0030] Specifically, the air induction unit includes:

[0031] An induced draft fan installed at the air inlet 24 of the ventilation chamber 3;

[0032] The drainage shell 8 is installed on the top of the tank body 1, and a “┐”-shaped air cavity 9 is formed on the side of the ventilation chamber 3 away from the air inlet 24. The ventilation chamber 3 is connected with the “┐”-shaped air cavity 9 to form a U-shaped gas loop;

[0033] An air duct 10 is arranged in each spoiler cavity 6, one end of the air duct 10 is rotatably connected to the bottom of the spoiler cavity 6, and the other end of the air duct 10 passes through the top of the evaporation chamber 2 and the top of the ventilation chamber 3 in sequence, and extends to the bottom side close to the "┐"-shaped air cavity 9; a rotating fan blade 11 is installed on the outer periphery of the air duct 10 and located in the ventilation chamber 3, a spoiler assembly is installed on the outer periphery of the air duct 10 and located in the spoiler cavity 6, and a plurality of blowing ports 12 are opened on the outer periphery of the air duct 10 and located on one side of the spoiler assembly;

[0034] An exhaust pipe 13 is installed on the top of the heating chamber 5, and an air outlet of the exhaust pipe 13 sequentially passes through the top of the evaporation chamber 2, the top of the ventilation chamber 3 and the top of the drainage shell 8 and is connected to the air inlet of the gas collector 14.

[0035] In the above, when preparing formaldehyde, the methanol solution is added into the evaporation chamber 2 from the feed port 22, and the methanol solution in the evaporation chamber 2 is heated to the evaporation boiling point of formaldehyde by the heating component 21, and then the pressurized air is continuously blown into the ventilation chamber 3 from the air inlet 24 by the induced draft fan, so that the air flows into the air duct 10 through the U-shaped gas loop, and is blown into the methanol solution from the blowing port 12. At the same time, the air drives the rotating fan blades 11 to drive the air duct 10 to rotate during the flow process, and then the air duct 10 drives the spoiler component to move up and down to disturb the methanol solution, so as to accelerate the evaporation efficiency of formaldehyde and continuously form a pressure difference inside the spoiler cavity 6. The methanol solution in the cavities on both sides of the flow plate 4 continues to flow through the flow holes 7, thereby ensuring that the air and the methanol solution are fully mixed, and the air is squeezed to form bubbles when passing through the flow holes 7, and the formaldehyde vapor evaporated from the methanol solution is entrained in the bubbles and discharged into the gas collector 14 through the exhaust pipe 13 for collection, which helps to quickly carry the formaldehyde vapor generated at the bottom of the methanol solution to the top for discharge, and further improves the evaporation efficiency of formaldehyde compared with the previous stirring device; and, in order to remove the methanol liquid entrained in the formaldehyde vapor, a demister is usually provided at the air inlet 24 of the gas collector 14, generally a spherical demister or a baffle demister.

[0036] Furthermore, there are at least two groups of spoiler components on the air duct 10 to enhance the disturbance amplitude of the methanol solution, thereby increasing the exchange area between the spoiler cavity 6 and the methanol solution in the heating cavity 5, so that the methanol solution in the evaporation chamber 2 is heated evenly.

[0037] Furthermore, the spoiler assembly includes an elliptical groove 15 arranged on the outer periphery of the air duct 10, a slider 16 and a spoiler 17. The elliptical groove 15 is opened on the outer periphery of the air duct 10 in a horizontal direction and is inclined downward; the slider 16 is slidably installed in the elliptical groove 15, and is fixedly installed on the inner periphery of the spoiler 17; the spoiler 17 is sleeved on the air duct 10, and the outer periphery of the spoiler 17 is slidably installed on the side wall of the spoiler cavity 6; when the air duct 10 rotates, the air duct 10 squeezes the slider 16 to slide along the elliptical groove 15, and at the same time, the slider 16 drives the spoiler 17 to move up and down along the side wall of the spoiler cavity 6, thereby forming a spoiler effect on the methanol solution. Specifically, a plurality of sieve holes 18 are provided on the spoiler 17, and the center lines of the sieve holes 18 are parallel to the center line of the air duct 10, so that part of the methanol solution passes through the sieve holes 18 when the spoiler 17 moves, thereby reducing the load of the spoiler 17 when it moves. At the same time, when air passes through the sieve holes 18, the amount of bubbles generated in the evaporation chamber 2 will increase, and the formaldehyde vapor will be entrained in the bubbles and discharged, thereby further improving the evaporation efficiency of the formaldehyde.

[0038] Furthermore, sealing sleeves 19 are respectively embedded in the top and bottom of the ventilation chamber 3, and the sealing sleeves 19 are rotatably installed on the outer periphery of the air guide pipe 10, so as to improve the sealing performance inside the evaporation chamber 2, ensure that formaldehyde vapor is discharged from the evaporation chamber 2 through the exhaust pipe 13, and reduce formaldehyde leakage.

[0039] Furthermore, the heating assembly 21 is configured as a heat exchanger, which is fixedly mounted at the bottom of the heating cavity 5, and the liquid inlet and liquid outlet of the heat exchanger respectively penetrate the side wall of the evaporation chamber 2, and extend to the outside of the tank body 1 to be equipped with a connecting flange, which is convenient for installing the water inlet pipe and the water outlet pipe. In the above, a through-flow groove 20 is provided between the outer periphery of the heat exchanger and the through-flow plate 4, which is used to increase the contact area between the methanol solution and the heat exchanger, and ensure that the methanol solution on the side of the heat exchanger close to the through-flow plate 4 can pass through the through-flow hole 7 and the methanol solution in the flow-turbulating cavity 6 to quickly exchange flow under the action of the flow disturbance, thereby ensuring that the temperature control of the methanol solution in the evaporation chamber 2 is balanced.

[0040] It should be noted that in this embodiment, the heating temperature of the methanol solution can be detected by arranging a temperature sensor in the evaporation chamber 2 using existing technical means.

[0041] The above are only several embodiments of the utility model, and do not limit the utility model in any form. Although the utility model is disclosed as above in the preferred embodiments, it is not used to limit the utility model. Any technician familiar with this profession, without departing from the scope of the technical solution of the utility model, makes slight changes or modifications using the technical contents disclosed above, which are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A formaldehyde evaporator, characterized in that: include: A tank body (1), wherein an evaporation chamber (2) and a ventilation chamber (3) are independently arranged in sequence from bottom to top inside the tank body (1), A plurality of flow plates (4) are arranged in the evaporation chamber (2), and the plurality of flow plates (4) divide the evaporation chamber (2) into at least one heating chamber (5) and a plurality of flow-disturbing chambers (6) in the horizontal direction; a plurality of groups of flow holes (7) are arranged on the flow plates (4), and the flow holes (7) are used to connect the heating chamber (5) and the flow-disturbing chamber (6); the gas outlet of the heating chamber (5) is connected to a gas collector (14); the formaldehyde added into the evaporation chamber (2) enters the flow-disturbing chamber (6), enters the heating chamber (5) through the flow holes (7), is heated and evaporated, and then enters the gas collector (14) for collection; The heating cavity (5) is provided with a heating component (21) for heating the formaldehyde; the spoiler cavity (6) is provided with a spoiler component; The ventilation chamber (3) is communicated with the outside and the turbulent chamber (6) respectively. An air induction unit is installed in the ventilation chamber (3) for introducing an external airflow into the evaporation chamber (2), thereby driving the evaporated formaldehyde to be discharged from the evaporation chamber (2) and strengthening the liquid disturbance in the evaporation chamber (2).

2. A formaldehyde evaporator according to claim 1, characterized in that: The air induction unit comprises: an induced draft fan installed at the air inlet (24) of the ventilation chamber (3); A drainage shell (8), the drainage shell (8) being mounted on the top of the tank body (1), forming a "┐"-shaped air cavity (9) on a side of the ventilation chamber (3) away from the air inlet (24), the ventilation chamber (3) being connected to the "┐"-shaped air cavity (9) to form a U-shaped gas circuit; An air guide pipe (10) is arranged in each of the spoiler cavities (6), one end of the air guide pipe (10) is rotatably connected to the bottom of the spoiler cavity (6), and the other end of the air guide pipe (10) passes through the top of the evaporation chamber (2) and the top of the ventilation chamber (3) in sequence, and extends to a side close to the bottom of the "┐"-shaped air cavity (9); a rotating fan blade (11) is installed on the outer periphery of the air guide pipe (10) and located in the ventilation chamber (3); the spoiler assembly is installed on the outer periphery of the air guide pipe (10) and located in the spoiler cavity (6); and a plurality of blowing ports (12) are arranged on the outer periphery of the air guide pipe (10) and located on one side of the spoiler assembly; An exhaust pipe (13) is arranged at the top of the heating chamber (5), and an air outlet of the exhaust pipe (13) sequentially passes through the top of the evaporation chamber (2), the top of the ventilation chamber (3) and the top of the drainage shell (8) and is connected to an air inlet of the gas collector (14).

3. A formaldehyde evaporator according to claim 2, characterized in that: The number of spoiler components on the air guide pipe (10) is at least two.

4. A formaldehyde evaporator according to claim 3, characterized in that: The spoiler assembly comprises: An elliptical slide groove (15) is arranged on the outer periphery of the air guide pipe (10), and the elliptical slide groove (15) is arranged to be inclined downward in a horizontal direction; A slider (16), wherein the slider (16) is slidably mounted in the elliptical slide groove (15); A spoiler (17), wherein the spoiler (17) is sleeved on the air guide pipe (10), the outer periphery of the spoiler (17) is slidably mounted on the side wall of the spoiler cavity (6), and the slider (16) is mounted on the inner periphery of the spoiler (17).

5. A formaldehyde evaporator according to claim 4, characterized in that: The spoiler (17) is provided with a plurality of groups of sieve holes (18), and the center lines of the sieve holes (18) are parallel to the center line of the air guide pipe (10).

6. A formaldehyde evaporator according to claim 2, characterized in that: Sealing sleeves (19) are respectively embedded in the top and bottom of the ventilation chamber (3), and the sealing sleeves (19) are installed on the outer periphery of the air guide pipe (10).

7. A formaldehyde evaporator according to claim 1, characterized in that: The heating component (21) is configured as a heat exchanger, which is installed at the bottom of the heating cavity (5). The liquid inlet and liquid outlet of the heat exchanger respectively penetrate the side wall of the evaporation chamber (2) and extend to the outside of the tank body (1) and are equipped with a connecting flange.

8. A formaldehyde evaporator according to claim 7, characterized in that: A flow groove (20) is provided between the outer periphery of the heat exchanger and the flow plate (4).

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