Air preheater with ash removal device

Abstract

The utility model discloses an air preheater with ash removal device, the device body, the inside of body is provided with preheating pipe, preheating pipe is diamond, preheating pipe is multiple, and pipe spacing gradually increases along the flue gas flow direction, forms the passage of wide in narrow out, arc guide plate, one end fixed assembly of body has the smoke inlet, and arc guide plate sets up between the smoke inlet and preheating pipe, pulse spray head, is sleeved in the outer periphery of preheating pipe, gas pipe, one end is linked together with pulse spray head, and one side of body is provided with air pump, and air pump is communicated with gas pipe, and the device is through arc guide plate, avoids the fly ash concentrated scouring caused by air flow impact, through the design of preheating pipe as diamond cross section, and the edge structure of diamond tube wall can destroy the adhesion condition of the accumulated ash, and the arrangement mode of wide in narrow out makes the airflow velocity gradually improve in the flowing process, reduces the adsorption deposition of fine particle, satisfies the requirement of user.

Description

Technical Field

[0001] This utility model relates to the field of air preheater technology, and in particular to an air preheater with a dust removal device. Background Technology

[0002] The core function of an air preheater is to use the waste heat of flue gas to heat the air required for combustion, thereby improving fuel utilization, reducing energy consumption, and reducing flue gas emission temperature, thus reducing thermal pollution to the environment. Its performance directly affects the energy efficiency and operating cost of the entire system. Traditional air preheaters mostly employ a tubular structure, using densely arranged circular heat exchange tubes to exchange heat between flue gas and air. However, in actual operation, fly ash carried in the flue gas continuously erodes the windward side of the heat exchange tubes, potentially causing perforations and leaks. This not only affects heat exchange efficiency but also necessitates shutdown for maintenance and replacement. Furthermore, fine particles and dust impurities in the flue gas easily adhere and deposit on the outer surface of the heat exchange tubes, forming an ash layer. Once the ash accumulates to a certain level, the system must be shut down for cleaning, presenting limitations. The reason for this problem is that traditional heat exchange tubes use a circular cross-section design. When fine particles in the flue gas come into contact with the tube wall, due to the adsorption effect of the circular surface and the stickiness of the particles themselves, the fine particles easily adhere to the tube wall and are difficult to detach by the airflow. In addition, in order to ensure the heat exchange area, the heat exchange tubes of traditional tubular preheaters are usually arranged in an array with equal spacing. This arrangement results in narrow and uniform airflow channels between the tubes, and the airflow velocity is reduced, making it easier for fine particles in the flue gas to deposit on the heat exchange tubes, thus forming stubborn ash that is difficult to clean and has limitations. Utility Model Content

[0003] The purpose of this invention is to provide an air preheater with a dust removal device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an air preheater with a dust removal device, comprising; The machine body has a preheating pipe inside. The preheating pipe is diamond-shaped and there are multiple sets of preheating pipes. The spacing between the pipes gradually increases along the flue gas flow direction, forming a wide inlet and narrow outlet channel. An arc-shaped guide plate is provided, with a smoke inlet fixedly mounted at one end of the machine body, and the arc-shaped guide plate is positioned between the smoke inlet and the preheating pipe; A pulse nozzle is fitted around the outer periphery of the preheating pipe; An air supply pipe is connected at one end to a pulse nozzle, and an air pump is installed on one side of the machine body, which is connected to the air supply pipe.

[0005] Preferably, an air inlet pipe is fixedly mounted on one side of the machine body, and the air inlet pipe is connected to the preheating pipe.

[0006] Preferably, a partition is fixedly installed inside the machine body, and the bottom of the air supply pipe abuts against the partition.

[0007] Preferably, an air outlet pipe is fixedly installed inside the machine body, and the air outlet pipe is connected to the preheating pipe.

[0008] Preferably, the gas supply pipe is provided with a conduit, the conduit array is arranged, and the conduit communicates with the pulse nozzle.

[0009] Preferably, a solenoid valve is provided at the connection between the conduit and the gas delivery pipe.

[0010] Preferably, a guide plate is fixedly mounted on the bottom of the machine body, and there are multiple sets of guide plates, which are symmetrically arranged.

[0011] Preferably, a collection box is slidably connected inside the body, and a baffle is fixedly installed inside the collection box.

[0012] The technical effects and advantages of this utility model are as follows: This device, through the setting of the arc-shaped guide plate, can guide the flue gas smoothly into the preheating tube area, avoiding the concentrated scouring of fly ash caused by airflow impact, and further protecting the preheating tube. By designing the preheating tube with a diamond cross-section, the angular structure of the diamond tube wall can destroy the adhesion conditions of ash. In addition, the preheating tube adopts an arrangement in which the tube spacing gradually increases along the flue gas flow direction, forming a wide inlet and narrow outlet channel. This structure can make the flue gas evenly dispersed when it enters, and the airflow velocity gradually increases during the flow process, reducing the adsorption and deposition of fine particles, thus meeting the needs of users. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the top of the preheating tube of this utility model; Figure 4 This is a schematic diagram of the pulse nozzle of this utility model; Figure 5 This is a schematic diagram of the air outlet pipe of this utility model; Figure 6 This is a schematic diagram of the collection box of this utility model.

[0014] In the diagram: 1. Body; 2. Arc-shaped guide plate; 22. Pulse nozzle; 23. Air supply pipe; 24. Air inlet pipe; 25. Baffle plate; 26. Air outlet pipe; 27. Conduit; 28. Solenoid valve; 29. ​​Guide plate; 210. Collection box; 211. Baffle plate; 3. Preheating pipe. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model provides, for example Figure 1 An air preheater with a dust removal device is shown, comprising: The machine body 1 has a preheating pipe 3 inside. The preheating pipe 3 is diamond-shaped and there are multiple sets of preheating pipes 3. The spacing between the pipes gradually increases along the flue gas flow direction, forming a wide inlet and narrow outlet channel. Arc-shaped guide plate 2, one end of the body 1 is fixedly equipped with a smoke inlet, and the arc-shaped guide plate 2 is set between the smoke inlet and the preheating pipe 3; The pulse nozzle 22 is fitted around the preheating pipe 3. The air supply pipe 23 is connected to the pulse nozzle 22 at one end. An air pump is installed on one side of the machine body 1, and the air pump is connected to the air supply pipe 23.

[0017] Example 1: In this example, the preheating tube 3 is made of high-temperature resistant alloy material, which has both good thermal conductivity and wear resistance. During use, high-temperature flue gas enters the machine body 1 through the flue gas inlet and flows smoothly to the preheating tube 3 area under the guidance of the arc-shaped guide plate 2. The wide inlet and narrow outlet channel design allows the flue gas to flow smoothly and disperse evenly, avoiding the formation of eddies and stagnant areas. At the same time, the air to be heated enters the interior of the preheating tube 3 through the air inlet pipe 24 and exchanges heat efficiently with the high-temperature flue gas outside the tube. The high-temperature air after preheating is discharged through the air outlet pipe 26 and delivered to the combustion equipment or other scenarios that require heating, realizing the effective recovery and utilization of flue gas waste heat.

[0018] like Figures 2 to 6 An air preheater with a dust removal device is shown, comprising: The machine body 1 has a preheating pipe 3 inside. The preheating pipe 3 is diamond-shaped and there are multiple sets of preheating pipes 3. The spacing between the pipes gradually increases along the flue gas flow direction, forming a wide inlet and narrow outlet channel. Arc-shaped guide plate 2, one end of the body 1 is fixedly equipped with a smoke inlet, and the arc-shaped guide plate 2 is set between the smoke inlet and the preheating pipe 3; The pulse nozzle 22 is fitted around the preheating pipe 3. The air supply pipe 23 is connected to the pulse nozzle 22 at one end. An air pump is installed on one side of the machine body 1, and the air pump is connected to the air supply pipe 23.

[0019] An air inlet pipe 24 is fixedly mounted on one side of the body 1, and the air inlet pipe 24 communicates with the preheating pipe 3. A partition 25 is fixedly mounted inside the body 1, and the bottom of the air supply pipe 23 abuts against the partition 25. An air outlet pipe 26 is fixedly mounted inside the body 1, and the air outlet pipe 26 communicates with the preheating pipe 3. A conduit 27 is provided on the air supply pipe 23, and the conduits 27 are arranged in an array, communicating with the pulse nozzle 22. A solenoid valve 28 is provided at the connection between the conduit 27 and the air supply pipe 23. A guide plate 29 is fixedly mounted on the bottom of the body 1, and there are multiple sets of guide plates 29, which are symmetrically arranged. A collection box 210 is slidably connected inside the body 1, and a baffle 211 is fixedly mounted inside the collection box 210.

[0020] Example 2: In this example, when dust removal is required, the air pump is started, blowing air into the air supply pipe 23. At this time, the solenoid valve 28 opens and closes accordingly, enabling the pulse nozzles 22 to clean the preheating pipes 3 one by one. During the dust removal process, the detached dust falls under the action of gravity and is guided by the guide plate 29 inclined at the bottom of the machine body 1, naturally falling into the slidingly connected collection box 210. The baffle 211 inside the collection box 210 can prevent the dust from splashing due to the airflow. It can be removed through the observation window on the side of the machine body 1 or by periodic extraction. The method of removing the collection box 210 monitors the amount of ash collected to prevent ash overflow. When the ash in the collection box 210 reaches 2 / 3 of the box volume, the operation of the machine body 1 is paused. Hold the handle at the front of the collection box 210 and pull it out from the inside of the machine body 1. One side of the collection box 210 is detachable. When cleaning the dust in the collection box 210, disassemble it and pour out the ash inside. After pouring out, push the collection box 210 back into the machine body 1 and ensure that it slides into place. Then the ash cleaning operation can be restarted or the normal operation of the equipment can be restored.

[0021] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air preheater with a dust removal device, characterized in that, include: The machine body (1) is provided with a preheating pipe (3) inside the machine body (1). The preheating pipe (3) is rhomboid and there are multiple sets of preheating pipes (3). The spacing between the pipes gradually increases along the flue gas flow direction to form a wide inlet and narrow outlet channel. Arc-shaped guide plate (2), one end of the body (1) is fixedly equipped with a smoke inlet, and the arc-shaped guide plate (2) is set between the smoke inlet and the preheating pipe (3); A pulse nozzle (22) is fitted around the outer periphery of the preheating pipe (3); The gas supply pipe (23) is connected to the pulse nozzle (22) at one end. An air pump is provided on one side of the machine body (1), and the air pump is connected to the gas supply pipe (23).

2. An air preheater with a dust removal device according to claim 1, characterized in that, An air inlet pipe (24) is fixedly mounted on one side of the body (1), and the air inlet pipe (24) is connected to the preheating pipe (3).

3. An air preheater with a dust removal device according to claim 1, characterized in that, The body (1) is internally fitted with a partition (25), and the bottom of the gas pipe (23) abuts against the partition (25).

4. An air preheater with a dust removal device according to claim 1, characterized in that, The body (1) is internally fitted with an air outlet pipe (26), which is connected to the preheating pipe (3).

5. An air preheater with a dust removal device according to claim 1, characterized in that, The gas supply pipe (23) is provided with a conduit (27), the conduits (27) are arranged in an array, and the conduits (27) are connected to the pulse nozzle (22).

6. An air preheater with a dust removal device according to claim 5, characterized in that, A solenoid valve (28) is provided at the connection between the conduit (27) and the gas transmission pipe (23).

7. An air preheater with a dust removal device according to claim 1, characterized in that, The bottom of the body (1) is fixedly equipped with a guide plate (29), and there are multiple sets of guide plates (29), which are symmetrically arranged.

8. An air preheater with a dust removal device according to claim 1, characterized in that, The body (1) has a collection box (210) slidably connected inside, and a baffle (211) is fixedly installed inside the collection box (210).

Images