Gas preheater

Abstract

The utility model discloses a gas preheater which comprises a device body, a heating layer is arranged in the device body, the top face of the device body is connected with a sealing cover, the sealing cover is connected with the device body, and a gas inlet pipe, a gas outlet pipe, a water inlet pipe and a water outlet pipe are arranged on the sealing cover. The lower end of the water outlet pipe extends to the lower end of the device body; the lower end of the air inlet pipe is communicated with a spiral pipe, the spiral pipe is arranged in the device body, and the other end of the spiral pipe is communicated with the lower end of the air outlet pipe; the air inlet pipe and the air outlet pipe are the same in structure, the air outlet pipe comprises a pipe body, a steam layer is arranged in the wall surface of the pipe body, the steam layer is communicated with the device body, and the upper end of the steam layer is communicated with the device body through a circulating pipe. According to the utility model, not only is the preheating effect of the gas improved, but also the waste heat of the steam is utilized to preserve the heat of the preheated steam, so that the preheating effect of the gas is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas preheating, and in particular relates to a gas preheater. Background Art

[0002] Liquid ammonia, also known as anhydrous ammonia, is a colorless liquid with a strong pungent odor. As an important chemical raw material, ammonia is usually converted into liquid ammonia by pressurizing or cooling gaseous ammonia for easy transportation and storage. Ammonia is easily soluble in water and forms ammonium ions NH 4+ 、hydroxyl ion OH - , an alkaline alkaline solution. Liquid ammonia is mostly stored in pressure-resistant steel cylinders or steel tanks, and cannot coexist with substances such as acetaldehyde, acrolein, and boron. Liquid ammonia is widely used in industry. It is corrosive and easily volatile, so its chemical accident rate is very high. Qualified hydrogen and nitrogen can be produced from natural gas as raw materials, and then synthesized in the synthesis section to produce qualified liquid ammonia. In this production process, the gas preheater needs to be used many times to preheat the mixed gas at different stages. However, in the existing preheater, the gas flow rate is too fast during the preheating process, resulting in poor preheating effect, and the temperature of the preheated gas cannot be maintained, causing it to cool down rapidly during transportation, further reducing the preheating effect. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a gas preheater, which not only improves the preheating effect of the gas, but also utilizes the preheating of steam to keep the preheated steam warm, thereby further improving the preheating effect of the gas.

[0004] The objective of the utility model is achieved through the following technical scheme: a gas preheater comprises a device body, a plurality of supporting columns are connected to the bottom surface of the device body, a heating layer is arranged in the device body, a water inlet pipe and a water outlet pipe are arranged on the device body, and an air inlet pipe and an air outlet pipe are arranged on the device body; a sealing cover is connected to the top surface of the device body, the sealing cover is connected to the device body, the air inlet pipe, the air outlet pipe, the water inlet pipe and the water outlet pipe are arranged on the sealing cover, and the lower end of the water outlet pipe extends to the lower end of the device body; the lower end of the air inlet pipe is connected with a spiral tube, the spiral tube is arranged inside the device body, and the other end of the spiral tube is connected with the lower end of the air outlet pipe; the air inlet pipe and the air outlet pipe have the same structure, the air outlet pipe comprises a tube body, a steam layer is arranged in the wall surface of the tube body, the steam layer is connected with the device body, and the upper end of the steam layer is connected with the device body through a circulation pipe.

[0005] Through the above scheme, the utility model prolongs the residence time of the gas in the device body through the setting of the spiral tube, and improves the preheating effect. The setting of the steam layer and the circulation tube utilizes the heat carried by the water vapor generated during the heating process to preheat and keep the gas warm, further ensuring the heating effect. The steam rises to the steam layer, condenses and flows back into the device body, and the uncondensed steam circulates into the device body through the steam tube.

[0006] Preferably, a dirt collecting tray is provided at the lower end of the device body, and the bottom surface of the dirt collecting tray abuts against the bottom surface of the device body.

[0007] Through the above solution, the scale collecting plate is provided to facilitate the collection of scale generated during the heating process, thereby preventing the scale from adhering to the device body and shortening the service life of the device.

[0008] Preferably, a temperature sensor and a pressure sensor are provided on the sealing cover, the temperature sensor and the pressure sensor are connected to a controller via electrical signals, the controller is connected to the wall surface of the device body, and the controller is connected to the heating layer via electrical signals.

[0009] Through the above scheme, the temperature sensor, pressure sensor and the like are arranged to monitor the temperature and pressure in the device body, and then control the working state of the heating layer through the controller to avoid the temperature and pressure in the device body being too high, which may cause safety hazards.

[0010] Preferably, the sealing cover comprises a cover body, a sealing layer is connected to the bottom surface of the cover body, a connecting ring is connected to the lower end of the sealing layer, the connecting ring is connected to the upper end of the device body, and an electromagnetic driving mechanism is provided on the sealing cover.

[0011] Through the above solution, the provision of the sealing layer ensures that the sealing cover and the device body are in a sealed state.

[0012] Preferably, the electromagnetic drive mechanism is connected to the controller through an electrical signal, and the electromagnetic drive mechanism drives the elastic hinge mechanism to control the connection and separation of the device body and the sealing cover; the elastic hinge mechanism is connected to the sealing cover, and the elastic hinge mechanism includes a fixed seat, and the fixed seat is connected to the sealing cover, and the two ends of the fixed seat are respectively connected to mounting shafts, and the mounting shaft is rotatably connected with a connecting ear, and the connecting ear is connected to the L-shaped plate, and a torsion spring sleeved on the mounting shaft is connected between the connecting ear and the fixed seat; the top surface of the horizontal section of the L-shaped plate is connected to a limiting block, and the limiting block is engaged in the limiting hole, and the limiting hole is arranged on the bottom surface of the connecting ring, and the connecting ring is connected to the upper end of the device body; the upper end of the elastic hinge mechanism is connected to a reciprocating mechanism, and the reciprocating mechanism is connected to the sealing cover, so as to facilitate the connection and separation of the limiting block and the limiting hole on the L-shaped plate.

[0013] Through the above scheme, the electromagnetic drive mechanism and the elastic hinge mechanism control the connection and removal of the sealing cover and the device body, which is easy to operate. When the electromagnetic drive mechanism is closed, the L-shaped plate is connected to the device body to achieve the connection between the sealing plate and the device body, and when the electromagnetic drive mechanism is opened, the L-shaped plate is disconnected from the device body to achieve the removal of the L-shaped plate from the device body.

[0014] Preferably, the electromagnetic drive mechanism comprises an electromagnet and a permanent magnet, the electromagnet is connected to the connecting ring, and the permanent magnet is connected to the inner wall of the L-shaped plate.

[0015] Through the above solution, the connection and removal of the sealing plate and the device body are achieved by energizing and de-energizing the electromagnet.

[0016] Preferably, a heating rod is connected to the middle of the sealing cover, the heating rod passes through the middle of the spiral tube, and the heating rod is connected to the controller through an electrical signal.

[0017] Through the above scheme, the setting of the heating rod heats the water from the middle, so that the water temperature rises quickly and the preheating efficiency is improved.

[0018] The beneficial effect of the utility model is that the utility model effectively improves the preheating effect and preheating efficiency through the arrangement of the spiral tube, the air inlet pipe and the air outlet pipe, and combined with the connection relationship between the sealing cover and the device body, it is convenient to connect and disassemble the sealing cover and the device body, facilitates the cleaning of the dirt collecting plate, and extends the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 is a schematic diagram of the structure of the exhaust pipe;

[0021] Figure 3 is a structural schematic diagram of an elastic hinge mechanism;

[0022] Figure 4 It is the connection diagram of the torsion spring;

[0023] In the figure, 1-device body, 2-water inlet pipe, 3-drain pipe, 4-air inlet pipe, 5-air outlet pipe, 501-tube body, 502-steam layer, 503-circulation pipe, 6-heating layer, 7-heating rod, 8-dirt collecting plate, 9-spiral tube, 10-controller, 11-sealing cover, 111-cover body, 112-sealing layer, 113-connecting ring, 12-temperature sensor, 13-pressure sensor, 14-fixed seat, 15-L-shaped plate, 16-limiting block, 17-connecting ear, 18-permanent magnet, 19-electromagnet, 20-installation shaft, 21-torsion spring, 22-limiting hole. DETAILED DESCRIPTION

[0024] The technical solution of the present utility model is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present utility model is not limited to the following.

[0025] Example 1

[0026] like Figure 1-Figure 4 As shown, a gas preheater comprises a device body 1, the bottom surface of the device body 1 is connected to four support columns, the support columns are all inclined, the lower ends of the support columns are far away from each other, and a heating layer 6 is provided in the wall surface of the device body 1; the top surface of the device body 1 is connected to a sealing cover 11, the sealing cover 11 is connected to the device body 1, and the sealing cover 11 is provided with the air inlet pipe 4, the air outlet pipe 5, the water inlet pipe 2 and the water outlet pipe 3, the water inlet pipe 2 is externally connected to a water pump, the air inlet pipe 4 is externally connected to an air pump, and the lower end of the water outlet pipe 3 extends to the The lower end of the device body 1; the lower end of the air inlet pipe 4 is connected with a spiral tube 9, the spiral tube 9 is arranged inside the device body 1, and the other end of the spiral tube 9 is connected with the lower end of the air outlet pipe 5; the air inlet pipe 4 and the air outlet pipe 5 have the same structure, the air outlet pipe 5 includes a tube body 501, the tube body 501 is connected with the spiral tube 9, a steam layer 502 is provided in the wall of the tube body 501, the steam layer 502 is connected with the device body 1, and the upper end of the steam layer 502 is connected with the device body 1 through a circulation pipe 503. A dirt collecting tray 8 is provided at the lower end of the device body 1, and the bottom surface of the dirt collecting tray 8 abuts against the bottom surface of the device body 1.

[0027] During specific implementation, water is passed through the water pump into the water inlet pipe 2 until the water level in the device body 1 rises to a certain height, and the water in the device body 1 is heated by the heating layer 6. Then, the gas to be preheated is passed into the air inlet pipe 4 through the air pump, and the gas is discharged through the air outlet pipe 5 after passing through the spiral tube 9. The gas is heated in the process of flowing through the spiral tube 9, thereby achieving preheating of the gas. The steam generated by the heated water enters the steam layer 502 of the air inlet pipe 4 and the air outlet pipe 5, heats the gas in the air inlet pipe 4, and keeps the gas in the air outlet pipe 5 warm, thereby improving the heating efficiency and ensuring the heating effect. The water ditch generated during the heating process sinks into the scale collecting plate 8 for collection, and the scale is cleaned after running for a period of time.

[0028] Example 2

[0029] On the basis of Example 1, the sealing cover 11 is provided with a PT100 temperature sensor 12 and a MIK3051 pressure sensor 13, the temperature sensor 12 and the pressure sensor 13 are connected to the controller 10 through wires, the controller 10 is connected to the wall of the device body 1, and the controller 10 is connected to the heating layer 6 through wires. The controller 10 is connected to a DN100 gas flow meter through wires, and the gas flow meter is respectively connected to the inlet pipe 4 and the outlet pipe 5. The sealing cover 11 includes a cover body 111, the bottom surface of the cover body 111 is connected to a sealing layer 112, the lower end of the sealing layer 112 is connected to a connecting ring 113, the connecting ring 113 is connected to the upper end of the device body 1, and the sealing cover 11 is provided with an electromagnetic drive mechanism. The electromagnetic drive mechanism is connected to the controller 10 through a wire, and the electromagnetic drive mechanism drives the elastic hinge mechanism to control the connection and separation of the device body 1 and the sealing cover 11; the elastic hinge mechanism is connected to the four corners of the sealing cover 11, and the elastic hinge mechanism includes a fixed seat 14, and the fixed seat 14 is connected to the sealing cover 11, and the two ends of the fixed seat 14 are respectively connected to the installation shaft 20, and the installation shaft 20 is rotatably connected to a connecting ear 17, and the connecting ear 17 is connected to the L-shaped plate 15, and a torsion spring 21 sleeved on the installation shaft 20 is connected between the connecting ear 17 and the fixed seat 14; the top surface of the horizontal section of the L-shaped plate 15 is connected to a limiting block 16, and the limiting block 16 is engaged in the limiting hole 22, and the limiting hole 22 is set on the bottom surface of the connecting ring 113, and the connecting ring 113 is connected to the upper end of the device body 1. The electromagnetic drive mechanism includes an electromagnet 19 and a permanent magnet 18, wherein the electromagnet 19 is connected to the connecting ring 113, and the permanent magnet 18 is connected to the inner wall of the L-shaped plate 15. A heating rod 7 is connected to the middle of the sealing cover 11, and the heating rod 7 is vertically arranged and passes through the middle of the spiral tube 9. The heating rod 7 is connected to the controller 10 through a wire.

[0030] In specific implementation, during the heating process, the pressure and temperature in the device body 1 are monitored by the temperature sensor 12 and the pressure sensor 13, and the operation of the heating layer 6 and the heating rod 7 is controlled by the controller 10 to prevent the temperature and pressure from being too high. When cleaning the dirt collecting plate 8, the connection relationship between the permanent magnet and the electromagnet 19 is controlled by the controller 10, so that the L-shaped plate 15 and the connecting ring 113 are connected or disassembled, which is convenient to operate, and there is no need to connect the sealing cover 11 to the device body 1 with multiple screws, which is cumbersome to operate. During the heating process, the gas flow meter monitors the air intake and air outlet to calculate the gas loss.

[0031] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A gas preheater, comprising a device body (1), the bottom surface of the device body (1) being connected to a plurality of support columns, a heating layer (6) being provided inside the device body (1), a water inlet pipe (2) and a water outlet pipe (3) being provided on the device body (1), and an air inlet pipe (4) and an air outlet pipe (5) being provided on the device body (1); characterized in that: The top surface of the device body (1) is connected to a sealing cover (11), the sealing cover (11) is connected to the device body (1), the sealing cover (11) is provided with the air inlet pipe (4), the air outlet pipe (5), the water inlet pipe (2) and the water outlet pipe (3), the lower end of the water outlet pipe (3) extends to the lower end of the device body (1); the lower end of the air inlet pipe (4) is connected to a spiral tube (9), the spiral tube (9) is arranged inside the device body (1), and the other end of the spiral tube (9) is connected to the lower end of the air outlet pipe (5); the air inlet pipe (4) and the air outlet pipe (5) have the same structure, the air outlet pipe (5) comprises a tube body (501), a steam layer (502) is provided on the wall surface of the tube body (501), the steam layer (502) is connected to the device body (1), and the upper end of the steam layer (502) is connected to the device body (1) through a circulation pipe (503).

2. A gas preheater according to claim 1, characterized in that: A dirt collecting tray (8) is provided at the lower end of the device body (1), and the bottom surface of the dirt collecting tray (8) abuts against the bottom surface of the device body (1).

3. A gas preheater according to claim 1, characterized in that: The sealing cover (11) is provided with a temperature sensor (12) and a pressure sensor (13); the temperature sensor (12) and the pressure sensor (13) are connected to a controller (10) via electrical signals; the controller (10) is connected to a wall surface of the device body (1); and the controller (10) is connected to the heating layer (6) via electrical signals.

4. A gas preheater according to claim 3, characterized in that: The sealing cover (11) comprises a cover body (111); the bottom surface of the cover body (111) is connected to a sealing layer (112); the lower end of the sealing layer (112) is connected to a connecting ring (113); the connecting ring (113) is connected to the upper end of the device body (1); and an electromagnetic drive mechanism is provided on the sealing cover (11).

5. A gas preheater according to claim 4, characterized in that: The electromagnetic drive mechanism is connected to the controller (10) via an electrical signal, and the electromagnetic drive mechanism drives the elastic hinge mechanism to control the connection and separation of the device body (1) and the sealing cover (11); the elastic hinge mechanism is connected to the sealing cover (11), and the elastic hinge mechanism comprises a fixing seat (14), the fixing seat (14) is connected to the sealing cover (11), and both ends of the fixing seat (14) are respectively connected to a mounting shaft (20), and the mounting shaft (20) is rotatably connected to a connecting shaft (20). A connecting ear (17), the connecting ear (17) is connected to the L-shaped plate (15), and a torsion spring (21) sleeved on the mounting shaft (20) is connected between the connecting ear (17) and the fixing seat (14); the top surface of the horizontal section of the L-shaped plate (15) is connected to a limiting block (16), the limiting block (16) is engaged in a limiting hole (22), the limiting hole (22) is arranged on the bottom surface of a connecting ring (113), and the connecting ring (113) is connected to the upper end of the device body (1).

6. A gas preheater according to claim 5, characterized in that: The electromagnetic drive mechanism comprises an electromagnet (19) and a permanent magnet (18), wherein the electromagnet (19) is connected to the connecting ring (113), and the permanent magnet (18) is connected to the inner wall of the L-shaped plate (15).

7. A gas preheater according to claim 3, characterized in that: A heating rod (7) is connected to the middle of the sealing cover (11), the heating rod (7) passes through the middle of the spiral tube (9), and the heating rod (7) is connected to the controller (10) via an electrical signal.

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