Packing type urea catalytic hydrolysis device

Abstract

The utility model discloses a packing type urea catalytic hydrolysis device which comprises a hydrolysis reaction kettle body and an air inlet pipe, the air inlet pipe is installed at the position of a shell at the air inlet end of the hydrolysis reaction kettle body, and the packing type urea catalytic hydrolysis device further comprises a pipe heating mechanism. A heat preservation space formed by a heat preservation core cylinder, a pressing ring, a protective cylinder and a base cushion block of the pipe warming mechanism can be protected on the outer side of an air inlet pipe, when steam enters the air inlet pipe, part of the steam can enter a coiled through pipe along an inserting pipe, heat dissipated by the coiled through pipe can be preserved in the heat preservation space, and the heat is kept on the outer side of the air inlet pipe; the steam heat in the air inlet pipe is effectively prevented from being reduced, a good pipe heating effect is achieved on the air inlet pipe, it is guaranteed that the temperature of the air inlet pipe is stable when steam enters the air inlet pipe subsequently, and then stable operation of the urea hydrolysis reaction kettle is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of urea catalytic hydrolysis technology, and in particular to a packing-type urea catalytic hydrolysis device. Background Technology

[0002] In the flue gas denitrification technology of thermal power plants, selective catalytic reduction (SCR) technology typically uses three sources for the preparation of ammonia as the reducing agent: liquid ammonia, ammonia water, and urea. In recent years, due to increased attention to safety factors and potential hazards, the market demand for urea hydrolysis ammonia production technology has grown. Urea hydrolysis technology has been maturely applied in the waste liquid recovery process of urea synthesis in the chemical industry. The main principle is to use a urea aqueous solution of a certain concentration to undergo a hydrolysis reaction under certain pressure and temperature, ultimately producing ammonia. When urea hydrolysis technology is applied to the field of flue gas denitrification and ammonia production, a hydrolysis reactor is usually selected for urea catalytic hydrolysis. The packing layer inside the hydrolysis reactor can be used for the hydrolysis reaction and mass and heat transfer of urea solution and gas.

[0003] In existing hydrolysis reactors used for urea catalytic hydrolysis, steam is introduced to heat the urea solution, allowing the urea solution to react under steam pressure. However, the steam inlet pipe of the hydrolysis reactor is usually directly exposed to the environment. In low-temperature conditions during winter, the inlet pipe cannot be effectively insulated by a simple insulation sleeve, causing the steam temperature to drop easily at the inlet pipe, affecting the stable operation of the urea hydrolysis reactor. To address this, we propose a packed-fill urea catalytic hydrolysis device. Utility Model Content

[0004] The main objective of this invention is to provide a packing-type urea catalytic hydrolysis device. By setting a warming mechanism at the air inlet pipe of the hydrolysis reactor body, the warming mechanism, consisting of an insulating core, pressure ring, protective sleeve, and base pad, forms an insulating space that protects the outside of the air inlet pipe. When steam enters the air inlet pipe, some of the steam can enter the coiled pipe along the connecting pipe. The heat dissipated by the coiled pipe can be kept warm in the insulating space, thus keeping this heat outside the air inlet pipe. This effectively prevents the steam temperature inside the air inlet pipe from decreasing, providing a good warming effect for the air inlet pipe and ensuring the temperature stability when steam subsequently enters the air inlet pipe. This, in turn, ensures the stable operation of the urea hydrolysis reactor and effectively solves the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A packing-type urea catalytic hydrolysis device includes a hydrolysis reactor body and an inlet pipe. The inlet pipe is installed at the inlet end shell of the hydrolysis reactor body. The device also includes a warm-up mechanism, which comprises a base block, connecting pipes, a coiled pipe, a protective sleeve, an insulation sleeve, an insulation core, a pressure ring, a guide tube, and a slit rubber sleeve. The base block is externally attached to the inlet pipe near the hydrolysis reactor body, and a cover is attached to the surface of the base block to enclose the inlet pipe. The outer casing has an insulation sleeve bonded to its inner wall, and an insulation core is bonded to its inner wall. The surface of the air inlet pipe inside the insulation core is welded with interlocking pipes from top to bottom, and a coiled tube that is inserted into the insulation core is welded between the two sets of interlocking pipes. A pressure ring is screwed onto the outer casing above the insulation sleeve, and a guide tube is fixed in the ring hole of the pressure ring. A split rubber sleeve for locking the air inlet pipe is bonded to the inner wall of the guide tube.

[0007] Furthermore, the slitting rubber sleeve is provided with a slitting groove at the ring body, and the slitting ring block of the slitting rubber sleeve is bonded to the inner wall of the conduit.

[0008] By adopting the above technical solution, the slit rubber sleeve can be pried open at the slit groove, thereby facilitating the enlargement of the slit rubber sleeve opening so that it can be fitted over the air intake pipe.

[0009] Furthermore, a bottom spiral tube is fixed below the ring body of the pressure ring, and the bottom spiral tube is screwed downward into the protective tube above the insulation cylinder;

[0010] By adopting the above technical solution, the bottom spiral tube below the pressure ring can be screwed into the protective sleeve for installation.

[0011] Furthermore, an L-shaped handle block is welded to the top of the pressure ring, and the diameter of the pressure ring is larger than the diameter of the sleeve opening.

[0012] By adopting the above technical solution, the pressure ring can be rotated by holding the L-shaped handle, which facilitates the rotation of the pressure ring with the bottom spiral tube.

[0013] Furthermore, the surface of the base pad is provided with a through hole for the air inlet pipe to pass through, and the concave surface of the base pad is pressed against the outer shell of the hydrolysis reactor body and bonded.

[0014] By adopting the above technical solution, the air inlet pipe can be welded to the body of the hydrolysis reactor after passing through the pad hole of the base pad block for interconnection, and then the base pad block can be bonded to the body of the hydrolysis reactor for installation.

[0015] Furthermore, the coiled tube is a spiral tube coiled around the outside of the air inlet pipe, and the spiral tube is inserted into the heat insulation core.

[0016] By adopting the above technical solution, steam can be introduced into the spiral tube of the coiled pipe and then dissipate heat in the insulation core, so that the insulation space composed of the insulation core, pressure ring, protective cylinder and base pad can maintain the temperature to insulate the air inlet pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention provides a warming mechanism at the inlet pipe of the hydrolysis reactor body. The warming mechanism consists of an insulation core, a pressure ring, a protective sleeve, and a base block, forming an insulation space that protects the outside of the inlet pipe. When steam enters the inlet pipe, some of the steam can enter the coiled pipe along the connecting pipe. The heat emitted by the coiled pipe can be kept warm in the insulation space, thus keeping the heat outside the inlet pipe. This effectively prevents the steam heat in the inlet pipe from decreasing, providing a good warming effect for the inlet pipe and ensuring the temperature stability when steam enters the inlet pipe subsequently. This, in turn, ensures the stable operation of the urea hydrolysis reactor.

[0019] Furthermore, the casing is equipped with a double-layer insulation structure consisting of an insulation outer casing and an insulation core, which effectively retains the heat emitted from the air inlet pipe, ensuring the warm-up operation of the air inlet pipe. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a packing-type urea catalytic hydrolysis device according to the present invention.

[0021] Figure 2 This is a schematic diagram showing the disassembly of the bottom swirl tube and the protective sleeve of a packing-type urea catalytic hydrolysis device according to this utility model.

[0022] Figure 3 This is an exploded view of the warming mechanism of a packing-type urea catalytic hydrolysis device according to this utility model.

[0023] In the diagram: 1. Hydrolysis reactor body; 2. Gas inlet pipe; 3. Warming pipe mechanism; 4. Base pad block; 5. Insertion pipe; 6. Coil pipe; 7. Protective sleeve; 8. Insulation sleeve; 9. Insulation core cylinder; 10. Bottom spiral pipe; 11. Pressure ring; 12. Guide tube; 13. Slit rubber sleeve ring. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] like Figure 1-3As shown, a packing-type urea catalytic hydrolysis device includes a hydrolysis reactor body 1 and an inlet pipe 2. The inlet pipe 2 is installed at the inlet end shell of the hydrolysis reactor body 1. The device also includes a warming mechanism 3, which comprises a base block 4, a connecting pipe 5, a coiled pipe 6, a protective sleeve 7, an insulation sleeve 8, an insulation core sleeve 9, a pressure ring 11, a guide tube 12, and a slit rubber sleeve 13. The base block 4 is externally bonded to the inlet pipe 2 near the hydrolysis reactor body 1, and a cover is bonded to the surface of the base block 4 covering the inlet pipe. The outer casing 7 of the pipe 2 has an insulation sleeve 8 bonded to its inner wall, and an insulation core 9 bonded to its inner wall. The surface of the air inlet pipe 2 inside the insulation core 9 is staggered with the insertion tubes 5 from top to bottom, and a coiled tube 6 that is inserted into the insulation core 9 is welded between the two sets of tubes of the insertion tubes 5. A pressure ring 11 is screwed onto the outer casing 7 above the insulation sleeve 8, and a guide tube 12 is fixed in the annular hole of the pressure ring 11. A split rubber sleeve 13 for locking the air inlet pipe 2 is bonded to the inner wall of the guide tube 12.

[0026] The slitting rubber sleeve 13 has a slitting groove at its ring body, and the slitting ring block of the slitting rubber sleeve 13 is bonded to the inner wall of the conduit 12.

[0027] By adopting the above technical solution, the slitting rubber sleeve 13 can be pried open at the slitting groove, thereby facilitating the enlargement of the opening of the slitting rubber sleeve 13 so that it can be fitted over the air intake pipe 2.

[0028] Among them, a bottom spiral tube 10 is fixed below the ring body of the pressure ring 11, and the bottom spiral tube 10 is spiraled downward into the protective tube 7 above the heat insulation cylinder 8.

[0029] By adopting the above technical solution, the bottom spiral tube 10 below the pressure ring 11 can be screwed into the protective sleeve 7 for installation.

[0030] The pressure ring 11 has an L-shaped handle block welded to its top end, and the diameter of the pressure ring 11 is larger than the diameter of the sleeve opening of the sleeve 7.

[0031] By adopting the above technical solution, the pressure ring 11 can be rotated by holding the L-shaped handle block, which makes it convenient for the pressure ring 11 to rotate with the bottom spiral tube 10.

[0032] The base pad 4 has a through hole on its surface for the air inlet pipe 2 to pass through, and the concave surface of the base pad 4 is pressed against the outer shell of the hydrolysis reactor body 1 for bonding.

[0033] By adopting the above technical solution, the air inlet pipe 2 can be welded to the hydrolysis reactor body 1 after passing through the pad hole of the base pad block 4 for interconnection, and then the base pad block 4 can be bonded to the hydrolysis reactor body 1 for installation.

[0034] The coiled tube 6 is a spiral tube that is coiled around the air inlet pipe 2, and the spiral tube of the coiled tube 6 is inserted into the heat insulation core 9.

[0035] By adopting the above technical solution, steam can be introduced into the spiral tube body of the coil tube 6 and then dissipate heat in the insulation core 9, so that the insulation space composed of the insulation core 9, pressure ring 11, protective cylinder 7 and base pad 4 can maintain the temperature to insulate the air inlet pipe 2.

[0036] It should be noted that this utility model is a packing-type urea catalytic hydrolysis device. A warming mechanism 3 is installed at the air inlet pipe 2 of the hydrolysis reactor body 1. The base block 4 of the warming mechanism 3 can be fitted over the air inlet pipe 2. The air inlet pipe 2 can then be normally welded to the hydrolysis reactor body 1 for interconnection. The outer surface of the air inlet pipe 2 can be interconnected with a coiled pipe 6 via two sets of connecting pipes 5. A protective sleeve 7 can then be bonded to the surface of the base block 4, allowing the protective sleeve 7, along with the insulation sleeve 8 and insulation core 9, to fit over the coiled pipe 6. At this point, it can be pried open from the cutting groove of the cutting rubber sleeve 13, allowing the cutting rubber sleeve 13 to fit over the air inlet pipe 2. Subsequently, the bottom spiral pipe 10 below the pressure ring 11 can be screwed into the protective sleeve 7. Foam can be injected into the bottom spiral pipe 10 to wrap the air inlet pipe 2 for insulation. Then, the flange at the top of the air inlet pipe 2 can be normally flanged to the external steam supply equipment pipe. When steam enters the air inlet pipe 2 along the pipe, some steam will enter the coil pipe 6 along the connecting pipe 5, so that the coil pipe 6 will dissipate heat to the insulation space composed of the insulation core cylinder 9, pressure ring 11, protective sleeve 7 and base pad 4. This heat is kept outside the air inlet pipe 2, thereby insulating the air inlet pipe 2 and performing a warm-up operation on the air inlet pipe 2, ensuring that the heat of the air inlet pipe 2 will not decrease when steam enters it later.

[0037] It should be noted that this utility model is a packing-type urea catalytic hydrolysis device. All components in this utility model are known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A packing type urea catalytic hydrolysis device, comprising a hydrolysis reactor body (1) and an inlet pipe (2), the inlet pipe (2) is installed at the inlet end shell of the hydrolysis reactor body (1), characterized in that: Also include a warm pipe mechanism (3), the warm pipe mechanism (3) includes base pad (4), the pipe (5) of plug-in, disc pipe (6), casing (7), heat preservation surrounding cylinder (8), heat preservation core cylinder (9), pressure ring (11), catheter (12) and split rubber sleeve ring (13), the inlet pipe (2) is close to the pipe body outside the hydrolysis reactor body (1) sleeve bonding base pad (4), and the block surface of base pad (4) is bonded with casing (7) covering the inlet pipe (2) outside, the inner cylinder wall of casing (7) is bonded with heat preservation surrounding cylinder (8), and the inner cylinder wall of heat preservation surrounding cylinder (8) is bonded with heat preservation core cylinder (9), the surface of inlet pipe (2) in heat preservation core cylinder (9) is offset welded from top to bottom with the pipe (5) of plug-in, and the disc pipe (6) is welded between the two groups of pipe bodies of the pipe (5) of plug-in and is clamped into heat preservation core cylinder (9), the casing (7) above heat preservation surrounding cylinder (8) is rotatably installed with pressure ring (11), and the ring hole of pressure ring (11) is fixed with catheter (12), the inner wall of catheter (12) is bonded with split rubber sleeve ring (13) for clamping against inlet pipe (2).

2. A packed urea catalytic hydrolysis device according to claim 1, characterized in that: The ring body of split rubber sleeve ring (13) is provided with a split slot, and the split ring body block of split rubber sleeve ring (13) is bonded at the inner pipe wall of catheter (12).

3. A packed urea catalytic hydrolysis device according to claim 1, characterized in that: The bottom of the ring body of pressure ring (11) is fixed with bottom rotary pipe (10), and the bottom rotary pipe (10) is rotated downward into the casing (7) above heat preservation surrounding cylinder (8).

4. A packed urea catalytic hydrolysis device according to claim 1, characterized in that: The top end of the ring body of pressure ring (11) is welded with an L-shaped handle block, and the diameter of the ring body of pressure ring (11) is greater than the diameter of the cylinder port of casing (7).

5. A packed urea catalytic hydrolysis device according to claim 1, characterized in that: The block surface of base pad (4) is provided with a pad hole for passing through inlet pipe (2), and the lower concave block surface of base pad (4) is pressed against the shell outside the hydrolysis reactor body (1).

6. A packed urea catalytic hydrolysis device according to claim 1, characterized in that: The pipe body of disc pipe (6) is a spiral pipe body coiled outside inlet pipe (2), and the spiral pipe body of disc pipe (6) is clamped into heat preservation core cylinder (9).

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