Urea hydrolysis ammonia production equipment

Abstract

The utility model belongs to the technical field of ammonia production, and particularly relates to urea hydrolysis ammonia production equipment which comprises a tank body and a gas outlet pipe, the gas outlet pipe is fixedly connected to one side of the tank body, a sealing base plate is arranged at the bottom of the gas outlet pipe, and an activated carbon filter plate and a fiber cotton filter plate are arranged on the two sides of the upper end face of the sealing base plate respectively. Symmetrically-arranged lock catches are rotationally connected to the front side and the rear side of the sealing base plate, a threaded rod is rotationally connected to the top of the air outlet pipe, hook frames corresponding to the lock catches up and down are in threaded connection to the threaded rod, and a separation mechanism is arranged between the sealing base plate and the activated carbon filter plate and between the sealing base plate and the cellucotton filter plate. According to the utility model, the sealing base plate is arranged on the air outlet pipe and is matched with the hook rack and the lock catch, so that the sealing base plate can be quickly disassembled and assembled, and the activated carbon filter plate and the fiber cotton filter plate can be completely disassembled from the sealing base plate and are convenient to clean by arranging the separating mechanism among the sealing base plate, the activated carbon filter plate and the fiber cotton filter plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of ammonia production, and specifically relates to a urea hydrolysis ammonia production device. Background Art

[0002] In the current flue gas denitrification process of thermal power plants, SCR technology is the most mature and has a high denitrification efficiency, and is the most widely used. The principle of SCR technology is to use ammonia as a reducing agent to catalyze the reduction reaction with nitrogen oxides at a temperature of 300-400°C to generate nitrogen and water that are non-toxic and harmless to the environment. Therefore, the preparation of ammonia has become an important link in SCR denitrification. The existing method generally uses urea hydrolysis to prepare ammonia. In the prior art, the urea solution is directly passed into the reactor and heated to produce hydrolysis. However, due to uneven heating, the conversion of urea hydrolysis into ammonia is incomplete and the reaction rate is low, which leads to waste of raw materials. At the same time, it is not suitable for large-flow gas production needs. At the same time, urea droplets remain in the prepared ammonia, affecting the subsequent use quality of ammonia.

[0003] The Chinese patent with the publication number CN210193426U discloses a urea hydrolysis ammonia production device for denitrification in a thermal power plant, including a shell, a disc-shaped heat pipe, an electric heating wire is arranged in the disc-shaped heat pipe, a liquid outlet pipe is arranged at the bottom of the shell, a control valve is arranged on the liquid outlet pipe, and a gas outlet auxiliary part is fixedly arranged on the top of the left outer wall of the shell. The electric heating wire heats the urea water through the disc-shaped heat pipe, and the urea water is stirred by the stirring hollow rod and the mixing support rod. The urea water is evenly heated, and the reaction efficiency and reaction quality of the urea water are improved. Through the fan and the electric heating network, it is adapted to the requirements of large flow gas production. The gas outlet auxiliary part absorbs the urea droplets carried by the ammonia in the removal process through the fiber cotton board, and is used to filter the ammonia through the activated carbon filter plate to remove the particulate impurities remaining in the ammonia. In the actual use process, the device has shortcomings. The filtering mechanism lacks a quick-release mechanism, and there is a problem of inconvenience in disassembly and replacement, which affects the work efficiency.

[0004] Therefore, in view of the deficiencies of the above-mentioned technologies, the present application proposes a urea hydrolysis ammonia production device that can effectively solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a urea hydrolysis ammonia production device in view of the deficiencies of the prior art, thereby effectively solving the problems existing in the prior art.

[0006] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0007] A device for producing ammonia by hydrolyzing urea comprises a tank body and an air outlet pipe, wherein the air outlet pipe is fixedly connected to one side of the tank body, a sealing pad is arranged at the bottom of the air outlet pipe, an activated carbon filter plate and a fiber cotton filter plate are arranged on both sides of the upper end surface of the sealing pad, respectively, front and rear sides of the sealing pad are rotatably connected with symmetrically arranged lock buckles, the top of the air outlet pipe is rotatably connected with a threaded rod, a hook frame corresponding to the upper and lower parts of the lock buckle is threadedly connected to the threaded rod, and a separation mechanism is arranged between the sealing pad and the activated carbon filter plate and the fiber cotton filter plate.

[0008] As a further configuration of the above scheme, the separation mechanism includes a pull rod, which is symmetrically slidably connected to the front and rear sides of the lower end surfaces of the activated carbon filter plate and the fiber cotton filter plate, respectively; the lower ends of the activated carbon filter plate and the fiber cotton filter plate are fixedly connected with ear plates with holes, the ear plates with holes are slidably connected to the pull rod, and a reset spring is fixedly connected between the ear plates with holes and the pull rod.

[0009] As a further arrangement of the above scheme, installation grooves are provided on the left and right sides of the upper end surface of the sealing pad, and positioning holes corresponding to the pull rods are provided on the front and rear sides of the inner cavity of the installation grooves. The reset spring applies thrust to the pull rod, forcing the pull rod to engage with the positioning hole, thereby fixing the activated carbon filter plate and the fiber cotton filter plate in the installation groove. When disassembling, the pull rod is pulled to disengage the pull rod from the positioning hole, and the activated carbon filter plate and the fiber cotton filter plate can be removed.

[0010] As a further configuration of the above scheme, a fixedly connected vertically upward limiting sliding rod is symmetrically provided on the top of the air outlet pipe, and a vertically penetrating sliding hole is opened on the hook frame, and the sliding hole is slidably connected to the limiting sliding rod.

[0011] As a further configuration of the above scheme, the top of the tank body is fixedly connected to a driving motor via a bracket, a stirring rod is fixedly connected to the driving motor, and the stirring rod is connected to the inside of the tank body for vertical downward rotation.

[0012] As a further configuration of the above solution, a heating wire is provided on the inner wall of the tank body, a discharge pipe is connected to the bottom of the tank body, and a valve is provided on the discharge pipe body.

[0013] The working principle of the utility model is as follows: urea water is injected from the right feed pipe, and the heating of the heating wire inside the tank body and the stirring of the stirring rod cause the urea water to be evenly heated and react to produce ammonia, and the ammonia is discharged from the outlet pipe to the next process. The ammonia passes through the outlet pipe and is doubly filtered by the activated carbon filter plate and the fiber cotton filter plate. When cleaning and replacing the activated carbon filter plate and the fiber cotton filter plate, the threaded rod is screwed in the reverse direction to lower the hook frame and disengage the locking fit with the lock buckle, and then the sealing pad is removed as a whole, and the sealing pad is taken out synchronously with the activated carbon filter plate and the fiber cotton filter plate, and the pull rod is pulled to cause the pull rod to disengage from the positioning hole, and the activated carbon filter plate and the fiber cotton filter plate are separated from the sealing pad.

[0014] The utility model has the following beneficial effects:

[0015] By arranging a sealing pad on the exhaust pipe, cooperating with a hook frame and a lock, the sealing pad can be quickly disassembled and assembled. By arranging a separation mechanism between the sealing pad, the activated carbon filter plate and the fiber cotton filter plate, the activated carbon filter plate and the fiber cotton filter can be completely disassembled from the sealing pad for easy cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the tank structure of the utility model;

[0018] Figure 3 It is a top view of the air outlet pipe structure of the utility model;

[0019] Figure 4 It is an expanded view of the structure of the air outlet pipe and the sealing pad of the utility model;

[0020] Figure 5 It is an expanded view of the sealing pad plate and the activated carbon filter plate structure of the utility model;

[0021] Figure 6 For this utility model Figure 5 A partial enlarged view of the middle A;

[0022] Figure 7 It is a schematic diagram of the separation mechanism structure of the utility model.

[0023] In the figure: 1. tank body; 2. exhaust pipe; 3. sealing pad; 4. activated carbon filter plate; 5. fiber cotton filter plate; 6. lock; 7. threaded rod; 8. hook rack; 9. separation mechanism; 10. pull rod; 11. ear plate with holes; 12. reset spring; 13. installation groove; 14. positioning hole; 15. drive motor; 16. stirring rod; 17. limit slide rod; 18. slide hole; 19. heating wire; 20. discharge pipe. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figure 1-7 , and describes the application in detail with reference to embodiments.

[0026] The present embodiment discloses a urea hydrolysis ammonia production device, comprising a tank body 1 and an air outlet pipe 2, the air outlet pipe 2 is connected to one side of the tank body 1, the top of the tank body 1 is fixedly connected to a drive motor 15 through a bracket, the output shaft of the drive motor 15 is fixedly connected to a stirring rod 16 through a coupling, and one end of the stirring rod 16 extends to the interior of the tank body 1, the inner wall of the tank body 1 is provided with a heating wire 19, the bottom of the tank body 1 is connected to a discharge pipe 20, and the discharge pipe 20 body is provided with a valve.

[0027] A sealing pad 3 is movably provided at the bottom of the air outlet pipe 2, and an activated carbon filter plate 4 and a fiber cotton filter plate 5 are respectively provided on both sides of the top of the sealing pad 3. A lock buckle 6 is rotatably provided on the front and rear sides of the sealing pad 3. A threaded rod 7 is rotatably connected to the top of the air outlet pipe 2 through a bearing, and a hook rack 8 used in conjunction with the lock buckle 6 is threadedly connected to the surface of the threaded rod 7. A separation mechanism 9 is provided between the sealing pad 3, the activated carbon filter plate 4 and the fiber cotton filter plate 5. The fiber cotton filter plate 5 adsorbs urea droplets carried by ammonia during the removal process, and the activated carbon filter plate 4 is used to filter the ammonia and remove particulate impurities remaining in the ammonia.

[0028] The separation mechanism 9 includes pull rods 10, which are slidably arranged in groups of two on the front and rear sides of the lower end surfaces of the activated carbon filter plate 4 and the fiber cotton filter plate 5, respectively. The front and rear sides of one side of the activated carbon filter plate 4 and the fiber cotton filter plate 5 are fixedly connected with perforated ear plates 11 that are slidably adapted to the pull rods 10, and a return spring 12 is fixedly connected between the perforated ear plates 11 and the adjacent pull rods 10. Installation grooves 13 are provided on both sides of the top of the sealing pad 3, and positioning holes 14 that are used in conjunction with the pull rods 10 are provided on the front and rear sides of the inner cavity of the installation groove 13.

[0029] The front side and the rear side of the top of the air outlet pipe 2 are fixedly connected to the limiting slide rod 17 , and the front side and the rear side of the top of the hook frame 8 are provided with a sliding hole 18 slidably matched with the limiting slide rod 17 .

[0030] The working process of the utility model is as follows: urea water is injected from the right feed pipe, and then the heating of the heating wire 19 inside the tank body 1 and the uniform stirring of the stirring rod 16 cause the urea water to react with heat to produce ammonia, and the ammonia is discharged from the outlet pipe 2 to the next process, and the ammonia passes through the outlet pipe 2 and is double filtered by the activated carbon filter plate 4 and the fiber cotton filter plate 5; when it is necessary to clean and replace the activated carbon filter plate 4 and the fiber cotton filter plate 5, the operator first shuts down the equipment, and then reversely screws the threaded rod 7 to cause the hook frame 8 to descend and disengage from the locking fit with the lock buckle 6, and then removes the sealing pad 3 as a whole, and the sealing pad 3 is taken out synchronously with the activated carbon filter plate 4 and the fiber cotton filter plate 5. If the activated carbon filter plate 4, the fiber cotton filter plate 5 and the sealing pad 3 need to be separated again for cleaning, the operator needs to manually pull the pull rod 10 to cause the pull rod 10 to disengage from the positioning hole 14, and then the activated carbon filter plate 4 and the fiber cotton filter plate 5 can be separated from the sealing pad 3.

[0031] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A urea hydrolysis ammonia production device, comprising a tank body and an air outlet pipe, wherein the air outlet pipe is fixedly connected to one side of the tank body, characterized in that: A sealing pad is provided at the bottom of the air outlet pipe, and an activated carbon filter plate and a fiber cotton filter plate are respectively provided on both sides of the upper end surface of the sealing pad, and the front and rear sides of the sealing pad are rotatably connected with symmetrically arranged lock buckles, and the top of the air outlet pipe is rotatably connected with a threaded rod, and the threaded rod is threadedly connected with a hook frame corresponding to the upper and lower lock buckles, and a separation mechanism is provided between the sealing pad and the activated carbon filter plate and the fiber cotton filter plate.

2. The urea hydrolysis ammonia production equipment according to claim 1, characterized in that: The separation mechanism includes a pull rod, which is symmetrically slidably connected to the front and rear sides of the lower end surfaces of the activated carbon filter plate and the fiber cotton filter plate, and the lower ends of the activated carbon filter plate and the fiber cotton filter plate are fixedly connected with perforated ear plates, which are slidably connected to the pull rod, and a reset spring is fixedly connected between the perforated ear plate and the pull rod.

3. The urea hydrolysis ammonia production equipment according to claim 1, characterized in that: The upper surface of the sealing pad is provided with installation grooves on both sides, and the front and rear sides of the inner cavity of the installation groove are provided with positioning holes corresponding to the pull rods.

4. The urea hydrolysis ammonia production equipment according to claim 1, characterized in that: The top of the air outlet pipe is symmetrically provided with a fixedly connected vertically upward limiting sliding rod, and the hook frame is provided with a vertically penetrating sliding hole, and the sliding hole is slidably connected with the limiting sliding rod.

5. The urea hydrolysis ammonia production equipment according to claim 1, characterized in that: The top of the tank body is fixedly connected to a driving motor through a bracket, and a stirring rod is fixedly connected to the driving motor. The stirring rod is connected to the inside of the tank body for vertical downward rotation. A heating wire is provided on the inner wall of the tank body, and a discharge pipe is connected to the bottom of the tank body.

Images