Urea pyrolysis device

Abstract

The utility model provides a urea pyrolysis device which comprises a furnace body, the outer surface of the furnace body is fixedly communicated with a water inlet pipe, a pipe orifice, located in the furnace body, of the water inlet pipe is communicated with a shunt pipe, the shunt pipe is U-shaped, and two pipe orifices of the shunt pipe are fixedly communicated with heat conduction pipes; wherein one heat conduction pipe is of a snakelike surrounding structure towards the inner wall of the top of the furnace body, and the other heat conduction pipe is of a snakelike surrounding structure towards the inner wall of the bottom of the furnace body. In addition, the radius of a pipe opening, close to the shunting pipe, of each heat conduction pipe is smaller than that of a pipe opening, away from the shunting pipe, of each heat conduction pipe. The pipe openings, not connected with the flow dividing pipe, of the two heat conduction pipes communicate with water outlet pipes, and the two water outlet pipes are fixedly arranged on the outer surface of the furnace body. And through the arrangement of the shunt pipe, the heating liquid can be more quickly spread over the whole furnace body, so that the urea solution in the furnace body is more quickly heated, and the thermal decomposition efficiency of the urea solution is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to urea pyrolysis technical field, concretely relates to a urea pyrolysis device. BACKGROUND

[0002] Urea is a white crystal, no odor, easily soluble in water, ethanol and benzene, slightly soluble in diethyl ether, chloroform. Urea is one of the simplest organic compounds, is the main nitrogen-containing end product of protein metabolism decomposition in mammals and some fish. In daily life, urea can be decomposed into ammonia and carbon dioxide by high temperature pyrolysis, so as to be applied to different fields such as environmental protection, energy, etc. The existing urea pyrolysis device usually has the problems of uneven heat distribution and low pyrolysis efficiency.

[0003] The patent with the existing announcement number CN212403482U discloses a high-efficiency urea pyrolysis furnace, which is provided with a furnace body, a water inlet pipe, a liquid inlet pipe, a drain pipe, a speed reducer, a rotating rod, a stirring plate, a heat pipe, a fin and the like. When in use, urea solution is first fed into the furnace body from the liquid inlet pipe, and then heating liquid is fed into the water inlet pipe, and the urea solution is heated by the heat pipe and the fin. At the same time, the speed reducer can be started to drive the rotating rod to rotate, so that the urea solution is stirred by the stirring plate, and the efficiency of urea pyrolysis is improved.

[0004] However, in the above-mentioned scheme, when the heating liquid is just started to be fed, the heating liquid cannot be quickly fed from one end of the heat pipe close to the water inlet pipe to the other end of the heat pipe away from the water inlet pipe, and the urea solution located at the position of the heat pipe away from the water inlet pipe cannot be heated in time, so that the heat distribution is relatively dispersed when the heating liquid is just started to be fed, and the area at the bottom of the furnace body cannot be quickly heated, thereby affecting the pyrolysis efficiency of the urea solution. UTILITY MODEL CONTENTS

[0005] In order to solve the problems in the background art, the utility model provides a urea pyrolysis device.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the technical scheme as follows:

[0007] A urea pyrolysis device, comprising a furnace body, a water inlet pipe is fixedly and communicatively arranged on the outer surface of the furnace body, a shunt pipe is communicatively arranged on the pipe opening of the water inlet pipe in the furnace body, the shunt pipe is arranged in a U shape, and a heat pipe is fixedly and communicatively arranged on both pipe openings of the shunt pipe; one of the heat pipes is in a snakelike ring structure around the top inner wall of the furnace body, and the other heat pipe is in a snakelike ring structure around the bottom inner wall of the furnace body; in addition, the radius of the pipe opening of each heat pipe close to the shunt pipe is smaller than the radius of the pipe opening of itself away from the shunt pipe; the pipe openings of the two heat pipes not connected with the shunt pipe are communicatively arranged with water outlet pipes, and the two water outlet pipes are fixedly arranged on the outer surface of the furnace body.

[0008] Further, a rotating shaft is arranged in the vertical direction in the furnace body, a plurality of first stirring rods are fixedly arranged on the outer surface of the rotating shaft, and the first stirring rods are arranged in a circular array along the central axis of the rotating shaft; the first stirring rods are arranged in cross with the heat conduction pipes.

[0009] Further, a first motor is fixedly installed on the top of the furnace body, the output shaft of the first motor is coaxially fixedly connected with the top of the rotating shaft, and the bottom of the first rotating shaft is rotationally connected with the inner wall of the bottom of the furnace body.

[0010] Further, a liquid inlet pipe is fixedly arranged on the top of the furnace body, a liquid outlet pipe is fixedly arranged on the bottom of the furnace body, and an electromagnetic valve is fixedly installed on the communication part between the furnace body and the liquid outlet pipe.

[0011] Further, a plurality of heat conduction fins are fixedly arranged on the outer surface of each heat conduction pipe.

[0012] Further, a hollow shaft is rotationally arranged in the furnace body, a plurality of second stirring rods are fixedly arranged on the outer surface of the hollow shaft, and the second stirring rods are arranged in a circular array along the central axis of the hollow shaft.

[0013] Further, a transmission mechanism for driving the hollow shaft and the rotating shaft to rotate in opposite directions is arranged on the furnace body; the transmission mechanism comprises a second motor, the second motor is fixedly installed on the top of the furnace body, and the output shaft of the second motor is fixedly provided with a first bevel gear; a fixed plate is fixedly arranged on the top of the furnace body, the fixed plate is rotationally connected with the top of the rotating shaft, and a second bevel gear is fixedly arranged on the outer surface of the rotating shaft; the hollow shaft is rotationally arranged on the outer surface of the rotating shaft, the top of the hollow shaft rotationally penetrates the top of the furnace body and is coaxially fixedly provided with a third bevel gear; the third bevel gear is arranged opposite to the second bevel gear, and the third bevel gear and the second bevel gear are both in meshing transmission with the first bevel gear.

[0014] The application has the following beneficial effects:

[0015] 1. The heating liquid can be more quickly distributed in the entire furnace body through the arrangement of the shunt pipe, so that the urea solution in the furnace body can be more quickly heated, and the thermal decomposition efficiency of the urea solution is improved.

[0016] 2. Since the radius of the pipe opening of the heat conduction pipe close to the water inlet pipe is smaller than the radius of the pipe opening of the heat conduction pipe away from the water inlet pipe, the flow rate of the heating liquid close to the water inlet pipe is greater than the flow rate of the heating liquid away from the water inlet pipe, so that the heating liquid can flow more quickly to the position away from the water inlet pipe, thereby more quickly heating the position away from the water inlet pipe, making the heat distribution more uniform, and further improving the thermal decomposition efficiency.

[0017] 3. The smaller radius of the heat pipe near the inlet pipe balances the heat difference between the heat pipe near the inlet pipe and the heat pipe far from the inlet pipe, so that the heat distribution in the furnace is more uniform, and the thermal decomposition efficiency is further improved.

[0018] 4. The motor drives the rotating shaft to rotate forward and drives the hollow shaft to rotate reversely, so that the rotating shaft and the stirring rod on the hollow shaft are continuously and staggeringly rotated, the stirring efficiency is improved, the urea solution is more uniformly stirred, the heat distribution in the urea solution is more uniform, and the pyrolysis efficiency of the urea solution is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description read in conjunction with the accompanying drawings. In the drawings, several embodiments of the present application are illustrated by way of example and not limitation in which like reference numerals refer to like elements throughout the various figures, in which:

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of the first embodiment of the present application;

[0021] Figure 2 is a sectional view of the first embodiment of the present application;

[0022] Figure 3 is a schematic diagram of the connection relationship between the inlet pipe, the shunt pipe and the heat pipe of the present application;

[0023] Figure 4 is a heat pipe arrangement diagram of the present application.

[0024] Figure 5 is a sectional view of the second embodiment of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1, support leg; 2, furnace body; 3, liquid inlet pipe; 4, first motor; 5, rotating shaft; 6, first stirring rod; 7, water inlet pipe; 8, shunt pipe; 9, heat pipe; 10, water outlet pipe; 11, liquid outlet pipe; 12, electromagnetic valve; 13, heat conduction sheet; 14, hollow shaft; 15, first bevel gear; 16, second bevel gear; 17, third bevel gear; 18, fixed plate; 19, second motor; 20, second stirring rod. DETAILED DESCRIPTION

[0027] With reference to the drawings and in light of the examples disclosed herein, those skilled in the art will understand that modifications and alterations can be made to the application without departing from the spirit and scope thereof. It is intended that the application shall cover all such modifications and alterations to the full extent permitted by the law.

[0028] Embodiment one: as shown in the utility model discloses a technical scheme as follows: a urea pyrolysis device, including furnace body 2, the bottom of furnace body 2 is fixedly arranged with several support legs 1, the top of furnace body 2 is fixedly arranged with liquid inlet pipe 3, the bottom of furnace body 2 is fixedly arranged with liquid outlet pipe 11, the communication place of furnace body 2 and liquid outlet pipe 11 is fixedly installed with electromagnetic valve 12, and urea solution can be transported into furnace body 2 through liquid inlet pipe 3. Figures 1-4

[0029] Rotary shaft 5 is rotationally arranged in the vertical direction in furnace body 2, and a plurality of first stirring rods 6 are fixedly arranged on the outer surface of rotary shaft 5, and the plurality of first stirring rods 6 are distributed in a circular array along the central axis of rotary shaft 5. The top of furnace body 2 is fixedly installed with first motor 4, the output shaft of first motor 4 is coaxially fixedly connected with the top of rotary shaft 5, and the bottom of rotary shaft 5 is rotationally connected with the inner wall of the bottom of furnace body 2.

[0030] Start first motor 4, and the output shaft of first motor 4 drives rotary shaft 5 to rotate, so as to drive a plurality of first stirring rods 6 to rotate, and then the urea solution in furnace body 2 is stirred, so that urea deposition is avoided, and the pyrolysis efficiency of urea solution is improved.

[0031] The outer surface of furnace body 2 is fixedly and communicatively provided with water inlet pipe 7, and water inlet pipe 7 is used for conveying heating liquid. The pipe opening of water inlet pipe 7 in furnace body 2 is communicatively provided with shunt pipe 8. Shunt pipe 8 is provided in a U-shaped structure, and shunt pipe 8 is arranged in an inclined manner. One heat pipe 9 is fixedly and communicatively arranged at each of the two pipe openings of shunt pipe 8. One of the two heat pipes 9 is arranged in a serpentine structure around the top inner wall of furnace body 2, and the other heat pipe 9 is arranged in a serpentine structure around the bottom inner wall of furnace body 2. The two heat pipes 9 are arranged in a cross manner with the first stirring rods 6. Each of the two heat pipes 9 is communicatively provided with one water outlet pipe 10, and the two water outlet pipes 10 are fixedly arranged on the outer surface of furnace body 2.

[0032] Meanwhile, a plurality of heat dissipation fins 13 are fixedly arranged on the outer surface of the two heat pipes 9. The heat dissipation fins 13 on the surface of heat pipe 9 are used for increasing the contact area with urea solution, so that the heat conduction speed of urea solution is faster, and the pyrolysis efficiency of the urea pyrolysis device is improved.

[0033] ​In addition, the portion of each heat conduction pipe 9 close to the shunt pipe 8 belongs to the front half, the portion of each heat conduction pipe 9 away from the shunt pipe 8 belongs to the rear half, and the pipe opening radius of the front half of each heat conduction pipe 9 is smaller than that of the rear half.

[0034] Since the pipe opening radius of the heat conduction pipe 9 close to the water inlet pipe 7 is smaller than that of the heat conduction pipe 9 away from the water inlet pipe 7, the flow rate of the heating liquid away from the water inlet pipe 7 is smaller than that close to the water inlet pipe 7, the residence time of the heating liquid away from the water inlet pipe 7 is longer, and the flow of the heating liquid away from the water inlet pipe 7 is larger, thereby balancing the heat difference caused by the heating liquid away from the water inlet pipe 7 and close to the water inlet pipe 7, making the heat distribution of the urea solution in the furnace body 2 more uniform, and further improving the thermal decomposition efficiency.

[0035] The working principle of the first embodiment is as follows: when in use, the urea solution is transported into the furnace body 2 through the liquid inlet pipe 3. Then the heating liquid is transported into the two heat conduction pipes 9 under the guidance of the shunt pipe 8. The heating liquid entering the heat conduction pipe 9 flows along the arrangement direction of the heat conduction pipe 9. During the flow of the heating liquid in the heat conduction pipe 9, the heat conduction fins 13 on the surface of the heat conduction pipe 9 increase the contact area with the urea solution, so that the heat conduction speed of the urea solution is faster, and the thermal decomposition efficiency of the urea pyrolysis device is improved.

[0036] At the same time, the first motor 4 is started, the output shaft of the first motor 4 drives the rotating shaft 5 to rotate, thereby driving the plurality of first stirring rods 6 to rotate, and further stirring the urea solution in the furnace body 2, avoiding urea deposition, and further improving the thermal decomposition efficiency of the urea solution.

[0037] In addition, since the pipe opening radius of the heat conduction pipe 9 close to the water inlet pipe 7 is smaller than that of the heat conduction pipe 9 away from the water inlet pipe 7, the heating liquid can flow more quickly to the position of the heat conduction pipe 9 away from the water inlet pipe 7, thereby more quickly heating the position of the heat conduction pipe 9 away from the water inlet pipe 7, i.e., more quickly heating the urea solution at the top and bottom of the furnace body 2, and further improving the thermal decomposition efficiency.

[0038] At the same time, since the pipe opening radius of the heat conduction pipe 9 close to the water inlet pipe 7 is smaller than that of the heat conduction pipe 9 away from the water inlet pipe 7, the flow rate of the heating liquid away from the water inlet pipe 7 is smaller than that close to the water inlet pipe 7, the residence time of the heating liquid away from the water inlet pipe 7 is longer, and the flow of the heating liquid away from the water inlet pipe 7 is larger, thereby balancing the heat difference caused by the heating liquid away from the water inlet pipe 7 and close to the water inlet pipe 7, making the heat distribution of the urea solution in the furnace body 2 more uniform, and further improving the thermal decomposition efficiency.

[0039] Embodiment two: as Figure 5Compared with the first embodiment, the second embodiment is different in that a hollow shaft 14 is arranged to rotate in the furnace body 2, and a plurality of second stirring rods 20 are fixedly arranged on the outer surface of the hollow shaft 14 and are distributed in a circular array along the central axis of the hollow shaft 14.

[0040] A transmission mechanism for driving the hollow shaft 14 and the rotating shaft 5 to rotate in opposite directions is arranged on the furnace body 2. The transmission mechanism comprises a second motor 19, which is horizontally arranged on the top of the furnace body 2 and has a first bevel gear 15 fixedly arranged on the output shaft thereof. A fixed plate 18 is fixedly arranged on the top of the furnace body 2 and is rotatably connected to the top of the rotating shaft 5, and a second bevel gear 16 is fixedly arranged on the outer surface of the rotating shaft 5. The hollow shaft 14 is rotatably arranged on the outer surface of the rotating shaft 5, and a third bevel gear 17 is coaxially fixedly arranged on the top of the hollow shaft 14 and penetrates through the top of the furnace body 2.

[0041] The third bevel gear 17 is arranged opposite to the second bevel gear 16, and both the third bevel gear 17 and the second bevel gear 16 are in meshing transmission with the first bevel gear 15.

[0042] The working principle of the second embodiment is as follows: the second motor 19 is started, the output shaft of the second motor 19 drives the first bevel gear 15 to rotate, the first bevel gear 15 drives the rotating shaft 5 to rotate through the second bevel gear 16, thereby driving the plurality of first stirring rods 6 on the outer surface of the rotating shaft 5 to rotate in a forward direction.

[0043] At the same time, the first bevel gear 15 also drives the hollow shaft 14 to rotate in a reverse direction through the third bevel gear 17, thereby driving the plurality of second stirring rods 20 on the outer surface of the hollow shaft 14 to rotate in a reverse direction.

[0044] The forward rotation of the first stirring rods 6 and the reverse rotation of the second stirring rods 20 can improve the overall stirring efficiency, so that the urea solution is stirred more uniformly, the heat distribution in the urea solution is more uniform, and the pyrolysis efficiency of the urea solution is further improved.

[0045] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A urea pyrolysis apparatus, characterized by, The application relates to a heat-conducting pipe type furnace body, which comprises a furnace body (2), the outer surface of the furnace body (2) is fixedly connected with an inlet pipe (7), the pipe opening of the inlet pipe (7) in the furnace body (2) is connected with a shunt pipe (8), the shunt pipe (8) is arranged in a U shape, and the two pipe openings of the shunt pipe (8) are fixedly connected with heat-conducting pipes (9); one of the heat-conducting pipes (9) is arranged in a snakelike loop structure towards the top inner wall of the furnace body (2), and the other heat-conducting pipe (9) is arranged in a snakelike loop structure towards the bottom inner wall of the furnace body (2); in addition, the radius of each heat-conducting pipe (9) near the pipe opening of the shunt pipe (8) is smaller than the radius of the heat-conducting pipe (9) far away from the pipe opening of the shunt pipe (8); the pipe openings of the two heat-conducting pipes (9) not connected with the shunt pipe (8) are connected with outlet pipes (10), and the two outlet pipes (10) are fixedly arranged on the outer surface of the furnace body (2).

2. The urea pyrolysis apparatus of claim 1, wherein A rotating shaft (5) is arranged in the furnace body (2) and rotates in the vertical direction; the outer surface of the rotating shaft (5) is fixedly provided with a plurality of first stirring rods (6), and the first stirring rods (6) are arranged in a circumferential array along the central axis of the rotating shaft (5); the first stirring rods (6) are arranged in a cross pattern with the heat-conducting pipes (9).

3. The urea pyrolysis apparatus of claim 2, wherein, A first motor (4) is fixedly arranged on the top of the furnace body (2); the output shaft of the first motor (4) is coaxially fixedly connected with the top of the rotating shaft (5); the bottom of the rotating shaft (5) is rotationally connected with the bottom inner wall of the furnace body (2).

4. The urea pyrolysis apparatus of claim 1, wherein An inlet pipe (3) is fixedly arranged on the top of the furnace body (2); an outlet pipe (11) is fixedly arranged on the bottom of the furnace body (2); and an electromagnetic valve (12) is fixedly arranged at the communication position of the furnace body (2) and the outlet pipe (11).

5. The urea pyrolysis apparatus of claim 1, wherein, A plurality of heat-conducting fins (13) are fixedly arranged on the outer surface of each heat-conducting pipe (9).

6. The urea pyrolysis apparatus of claim 2, wherein, A hollow shaft (14) is arranged in the furnace body (2) and rotates; a plurality of second stirring rods (20) are fixedly arranged on the outer surface of the hollow shaft (14), and the second stirring rods (20) are arranged in a circumferential array along the central axis of the hollow shaft (14).

7. The urea pyrolysis apparatus of claim 6, wherein, A transmission mechanism is arranged on the furnace body (2) and drives the hollow shaft (14) and the rotating shaft (5) to rotate in opposite directions; the transmission mechanism comprises a second motor (19) fixedly arranged on the top of the furnace body (2); the output shaft of the second motor (19) is fixedly provided with a first bevel gear (15); a fixed plate (18) is fixedly arranged on the top of the furnace body (2) and rotationally connected with the top of the rotating shaft (5); a second bevel gear (16) is fixedly arranged on the outer surface of the rotating shaft (5); the hollow shaft (14) is rotationally arranged on the outer surface of the rotating shaft (5); the top of the hollow shaft (14) rotationally penetrates the top of the furnace body (2) and is coaxially fixedly provided with a third bevel gear (17); the third bevel gear (17) is arranged opposite to the second bevel gear (16); and the third bevel gear (17) and the second bevel gear (16) are in meshing transmission with the first bevel gear (15).

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