Chemical industry waste gas waste heat recovery device

Abstract

The utility model discloses a kind of chemical industry waste gas waste heat recovery devices, it is related to waste heat recovery technical field, to solve the technical problem that impurity in current chemical industry waste gas is extremely easy to adhere to heat exchange tube surface and then scale, including heat exchange box and the heat exchange mechanism arranged in heat exchange box, the heat exchange box includes lower box and upper box, the upper end of the upper box is provided with symmetric distribution's air inlet pipe and air outlet pipe, the heat exchange mechanism includes heat exchange copper pipe, lower airflow baffle and upper airflow baffle, the heat exchange copper pipe is arranged in heat exchange box, the both ends of the heat exchange copper pipe are respectively provided with water inlet pipe and water outlet pipe, the lower airflow baffle is movably arranged in lower box, and the upper airflow baffle is installed in the upper end of lower airflow baffle.The utility model has the advantages that movable upper and lower airflow baffle scrape heat exchange copper pipe surface impurity, guarantee heat exchange efficiency, zigzag airflow channel prolongs waste gas flow time, improves the advantage of heat recovery efficiency.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, and more specifically, to a waste heat recovery device for chemical industrial waste gas. Background Technology

[0002] Waste heat recovery refers to the technology of recovering and reusing excess heat (such as high-temperature flue gas and cooling media) generated during industrial production and energy utilization. It can effectively improve energy efficiency and reduce energy consumption and greenhouse gas emissions. It is commonly used in industries such as steel, chemicals, and power.

[0003] Waste heat recovery from chemical industrial waste gas is an important means to achieve energy conservation, emission reduction, and lower production costs. Chemical waste gas typically contains impurities such as dust, tar, and organic matter. During waste heat recovery, these impurities easily adhere to the surface of heat exchange tubes, forming scale. The presence of scale significantly reduces heat exchange efficiency, degrades the performance of the waste heat recovery device, and greatly diminishes the energy recovery effect. Therefore, we propose a waste heat recovery device for chemical industrial waste gas. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a waste heat recovery device for chemical industrial waste gas to solve the technical problem that impurities in the current chemical industrial waste gas are easily attached to the surface of the heat exchange tube and thus form scale.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a waste heat recovery device for chemical industrial waste gas, including a heat exchange box and a heat exchange mechanism installed inside the heat exchange box. The heat exchange box includes a lower box and an upper box. The upper end of the upper box is provided with an inlet pipe and an outlet pipe that are symmetrically distributed. The heat exchange mechanism includes a heat exchange copper tube, a lower airflow baffle and an upper airflow baffle. The heat exchange copper tube is installed inside the heat exchange box. The two ends of the heat exchange copper tube are respectively provided with an inlet pipe and an outlet pipe. The lower airflow baffle is movably installed inside the lower box, and the upper airflow baffle is installed on the upper end of the lower airflow baffle.

[0006] Preferably, mounting plates are arranged in an array on the outer surfaces of both the lower and upper housings, and bolts are installed between the mounting plates. The upper housing is fixed to the upper end of the lower housing by bolts.

[0007] Preferably, the upper end of the lower box and the lower end of the upper box are provided with corresponding arc-shaped notches, the inlet pipe and outlet pipe of the heat exchange copper tube extend out of the heat exchange box from the arc-shaped notches respectively, and a limiting plate is provided on the heat exchange copper tube, the limiting plate being in contact with the inner wall of the heat exchange box.

[0008] Preferably, a push-pull rod is installed at the rear end of the lower airflow baffle, and an extension hole is opened at the rear end of the lower housing, through which the push-pull rod extends out of the lower housing.

[0009] Preferably, both the upper and lower airflow baffles are bent several times along their long axis, dividing the heat exchange box into several airflow channels. The inlet pipe is connected to the beginning of the airflow channel, and the outlet pipe is connected to the end of the airflow channel. A vent is provided on one side of the bend of the upper and lower airflow baffles, connecting adjacent airflow channels. Corresponding positioning notches are provided at the lower end of the upper airflow baffle and the upper end of the lower airflow baffle, forming a circular hole. The outer surface of the heat exchange copper tube is in contact with the inner wall of the circular hole.

[0010] Preferably, a lower fitting part is provided at the middle of the bending position of the upper airflow baffle, a positioning hole is provided at the upper end of the lower fitting part, an upper fitting part is provided at the middle of the bending position of the upper airflow baffle, and a positioning pin is provided at the lower end of the upper airflow baffle, the positioning pin being inserted into the positioning hole.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model designs an upper and lower airflow baffle structure. The positioning notches of the upper and lower airflow baffles are connected to form a circular hole, and the outer surface of the heat exchange copper tube is in contact with the inner wall of the circular hole. By pulling the push rod, the upper and lower airflow baffles move back and forth, and the inner wall of the circular hole scrapes the outer surface of the heat exchange copper tube, which can effectively remove attached impurities and prevent scaling. This ensures that the heat exchange copper tube always maintains good heat exchange efficiency, avoids performance degradation caused by fouling, and improves energy recovery. Secondly, the upper and lower airflow baffles are bent multiple times along the long axis, dividing several tortuous airflow channels in the heat exchange box. This greatly extends the circulation time of chemical industrial waste gas in the heat exchange box, allowing the waste gas to have a more sufficient contact area and contact time with the heat exchange copper tube. This ensures that the heat in the waste gas can be fully transferred to the cold water in the heat exchange copper tube, achieving efficient heat recovery, improving energy utilization, and solving the problem that impurities in chemical industrial waste gas are easily attached to the surface of the heat exchange tube and thus cause scaling.

[0013] 2. This utility model also features a heat exchange box structure designed to consist of a lower box and an upper box, which are connected by a mounting plate and bolts. The boxes can be separated by unscrewing the bolts. The arc-shaped notches at corresponding positions on the lower and upper boxes, as well as the limiting plates on the heat exchange copper tubes, facilitate the removal of the upper box for cleaning and maintenance of the device without affecting the connection of the heat exchange copper tubes. At the same time, the upper airflow baffle is securely connected to the lower airflow baffle by positioning pins, which facilitates the disassembly and maintenance of the airflow baffle when needed, reducing the difficulty of inspection and maintenance and the maintenance cost of the device. Attached Figure Description

[0014] Figure 1This is a front view structural diagram of the present utility model;

[0015] Figure 2 This is a schematic diagram of the upper housing of this utility model when opened;

[0016] Figure 3 This is a schematic diagram of the internal structure of the heat exchanger box of this utility model;

[0017] Figure 4 This is a schematic diagram of the heat exchange mechanism of this utility model;

[0018] Figure 5 This is a schematic diagram of the airflow baffle structure of this utility model.

[0019] Explanation of the numbers in the diagram: 100, heat exchange box; 101, lower box; 102, upper box; 103, mounting plate; 104, air inlet pipe; 105, air outlet pipe; 106, arc-shaped notch; 200, heat exchange mechanism; 201, heat exchange copper tube; 2011, water inlet pipe; 2012, water outlet pipe; 2013, limiting plate; 202, lower airflow baffle; 2021, lower fitting part; 203, upper airflow baffle; 2031, upper fitting part; 2032, positioning pin; 204, positioning notch; 205, vent; 206, push-pull rod; 207, airflow channel. Detailed Implementation

[0020] like Figures 1 to 5 As shown, this utility model relates to a waste heat recovery device for chemical industrial waste gas, including a heat exchange box 100 and a heat exchange mechanism 200 installed inside the heat exchange box 100. The heat exchange box 100 includes a lower box 101 and an upper box 102. The upper end of the upper box 102 is provided with an inlet pipe 104 and an outlet pipe 105 that are symmetrically distributed. The heat exchange mechanism 200 includes a heat exchange copper tube 201, a lower airflow baffle 202 and an upper airflow baffle 203. The heat exchange copper tube 201 is installed inside the heat exchange box 100. The two ends of the heat exchange copper tube 201 are respectively provided with a water inlet pipe 2011 and a water outlet pipe 2012. The lower airflow baffle 202 is movably installed inside the lower box 101, and the upper airflow baffle 203 is installed on the upper end of the lower airflow baffle 202. This invention uses movable upper and lower airflow baffles to scrape away impurities from the surface of the heat exchange copper tube 201, ensuring heat exchange efficiency; the tortuous airflow channel 207 extends the exhaust gas circulation time, improving the heat recovery effect; and the housing is detachable, making maintenance convenient and reducing costs.

[0021] Specifically, mounting plates 103 are arranged in an array on the outer surfaces of both the lower housing 101 and the upper housing 102. Bolts are installed between the mounting plates 103, and the upper housing 102 is fixed to the upper end of the lower housing 101 by bolts. The mounting plates 103, together with the bolts, allow the upper housing 102 to be installed on the upper end of the lower housing 101.

[0022] Furthermore, corresponding arc-shaped notches 106 are provided at the upper end of the lower housing 101 and the lower end of the upper housing 102. The inlet pipe 2011 and outlet pipe 2012 of the heat exchange copper tube 201 extend out of the heat exchange box 100 from the arc-shaped notches 106, respectively. A limiting plate 2013 is provided on the heat exchange copper tube 201, and the limiting plate 2013 contacts the inner wall of the heat exchange box 100. The arc-shaped notches 106, together with the limiting plate 2013, can limit the installation of the heat exchange copper tube 201, preventing it from shifting or shaking.

[0023] It is worth noting that a push-pull rod 206 is installed at the rear end of the lower airflow baffle 202, and an extension hole is opened at the rear end of the lower housing 101. The push-pull rod 206 extends out of the lower housing 101 from the extension hole. When there are many impurities attached to the outer surface of the heat exchange copper tube 201, the upper airflow baffle 203 and the lower airflow baffle 202 can be moved back and forth by manually pulling the push-pull rod 206. Because the heat exchange copper tube 201 is in contact with the inner wall of the circular hole, the outer surface of the heat exchange copper tube 201 can be scraped through the circular hole during the back and forth movement of the upper airflow baffle 203 and the lower airflow baffle 202, thereby scraping off the impurities attached to the outer surface of the heat exchange copper tube 201. This can ensure the efficiency and effect of heat exchange of the heat exchange copper tube 201. Secondly, the circular hole formed by the positioning notch 204 can support and limit the heat exchange copper tube 201, which can ensure the stability of the installation of the heat exchange copper tube 201.

[0024] It is worth mentioning that the upper airflow baffle 203 and the lower airflow baffle 202 are both set with several bends along the long axis. The upper airflow baffle 203 and the lower airflow baffle 202 divide the heat exchange box 100 into several airflow channels 207. The air inlet pipe 104 is connected to the beginning of the airflow channel 207, and the air outlet pipe 105 is connected to the end of the airflow channel 207. A vent 205 is opened on one side of the bend position of the upper airflow baffle 203 and the lower airflow baffle 202. The vent 205 connects the adjacent airflow channels 207. The lower end of the upper airflow baffle 203 and the upper end of the lower airflow baffle 202 are provided with corresponding positioning notches 204. The positioning notches 204 are joined to form a circular hole, and the outer surface of the heat exchange copper tube 201 is in contact with the inner wall of the circular hole. The upper airflow baffle 203 and lower airflow baffle 202, which are arranged with several bends, form a tortuous airflow channel 207, which greatly extends the airflow time in the heat exchange box 100, so that the heat in the chemical industrial waste gas can be fully recovered and utilized, ensuring the effect of energy recovery.

[0025] It is worth noting that a lower fitting part 2021 is provided at the middle of the bend position of the upper airflow baffle 203, and a positioning hole is provided at the upper end of the lower fitting part 2021. An upper fitting part 2031 is provided at the middle of the bend position of the upper airflow baffle 203, and a positioning pin 2032 is provided at the lower end of the upper airflow baffle 203, which is inserted into the positioning hole. The lower fitting part 2021 and the upper fitting part 2031 not only allow the airflow baffle to contact the inner wall of the heat exchange box 100 and close the airflow channel 207, but also, in conjunction with the positioning pin 2032, allow the upper airflow baffle 203 to be installed, fixing the upper airflow baffle 203 onto the lower airflow baffle 202.

[0026] Working Principle: This embodiment provides a waste heat recovery device for chemical industrial waste gas. During use, the chemical industrial waste gas enters the heat exchange box 100 through the inlet pipe 104. Due to the multiple bends along the long axis of the upper airflow baffle 203 and lower airflow baffle 202, several tortuous airflow channels 207 are separated within the heat exchange box 100. After entering, the waste gas flows along these tortuous airflow channels 207. This tortuous design greatly prolongs the flow time of the waste gas within the heat exchange box 100. Simultaneously, cold water flows into the heat exchange copper tube 201 through the water inlet pipe 2011, ensuring sufficient heat exchange between the waste gas and the heat exchange copper tube 201. With a certain contact area, as the exhaust gas flows along the airflow channel 207, the heat in the exhaust gas is transferred to the cold water inside the heat exchange copper tube 201 through heat transfer, achieving heat exchange. The hot water after heat exchange flows out from the outlet pipe 2012 and can be recycled and reused, while the exhaust gas, after absorbing heat, continues to flow along the airflow channel 207 and is finally discharged from the outlet pipe 105. During long-term use, impurities in the chemical exhaust gas may adhere to the surface of the heat exchange copper tube 201, resulting in scaling and affecting the heat exchange efficiency. The outer surface of the heat exchange copper tube 201 is positioned by the positioning notch 204 formed by the upper airflow baffle 203 and the lower airflow baffle 202. The inner walls of the circular holes formed by the docking are fitted together. By manually pulling the push-pull rod 206 at the rear end of the lower airflow baffle 202, the lower airflow baffle 202 and the upper airflow baffle 203 mounted on it can move back and forth. Because the heat exchange copper tube 201 is fitted with the inner wall of the circular hole, the inner wall of the circular hole can scrape the outer surface of the heat exchange copper tube 201 during the back and forth movement of the upper and lower airflow baffles, thereby scraping off the impurities attached to the outer surface of the heat exchange copper tube 201 and restoring the heat exchange efficiency of the heat exchange copper tube 201. In addition, when the lower housing 101 and the upper housing 102 need to be disassembled for maintenance or inspection of the internal structure, the mounting plates 103 can be unscrewed. The bolts are designed so that the upper end of the lower housing 101 and the lower end of the upper housing 102 are provided with corresponding arc-shaped notches 106, and the heat exchange copper tube 201 is provided with a limiting plate 2013 that contacts the inner wall of the heat exchange box 100. Without affecting the connection of the heat exchange copper tube 201, the upper housing 102 can be easily removed to clean and maintain the inside of the device. The upper airflow baffle 203 is inserted into the positioning hole of the lower fitting part 2021 through the positioning pin 2032 and is firmly connected to the lower airflow baffle 202. This ensures the stability of the airflow channel 207 structure during device operation and also facilitates the disassembly and maintenance of the airflow baffle when needed.

[0027] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A waste heat recovery device for chemical industrial waste gas, characterized in that, The device includes a heat exchange box (100) and a heat exchange mechanism (200) installed inside the heat exchange box (100). The heat exchange box (100) includes a lower box body (101) and an upper box body (102). The upper end of the upper box body (102) is provided with an air inlet pipe (104) and an air outlet pipe (105) that are symmetrically distributed. The heat exchange mechanism (200) includes a heat exchange copper tube (201), a lower airflow baffle (202) and an upper airflow baffle (203). The heat exchange copper tube (201) is installed inside the heat exchange box (100). The two ends of the heat exchange copper tube (201) are respectively provided with a water inlet pipe (2011) and a water outlet pipe (2012). The lower airflow baffle (202) is movably installed inside the lower box body (101), and the upper airflow baffle (203) is installed on the upper end of the lower airflow baffle (202).

2. The waste heat recovery device for chemical industrial waste gas according to claim 1, characterized in that, The outer surfaces of the lower housing (101) and the upper housing (102) are each provided with an array of mounting plates (103), and bolts are installed between the mounting plates (103). The upper housing (102) is fixed to the upper end of the lower housing (101) by bolts.

3. The waste heat recovery device for chemical industrial waste gas according to claim 2, characterized in that, The upper end of the lower box (101) and the lower end of the upper box (102) are provided with corresponding arc-shaped notches (106). The inlet pipe (2011) and outlet pipe (2012) of the heat exchange copper tube (201) extend out of the heat exchange box (100) from the arc-shaped notches (106). A limiting plate (2013) is provided on the heat exchange copper tube (201), and the limiting plate (2013) contacts the inner wall of the heat exchange box (100).

4. The waste heat recovery device for chemical industrial waste gas according to claim 3, characterized in that, A push-pull rod (206) is installed at the rear end of the lower airflow baffle (202), and an extension hole is provided at the rear end of the lower housing (101). The push-pull rod (206) extends out of the lower housing (101) from the extension hole.

5. A waste heat recovery device for chemical industrial waste gas according to claim 4, characterized in that, The upper airflow baffle (203) and the lower airflow baffle (202) are both bent several times along their long axis. The upper airflow baffle (203) and the lower airflow baffle (202) divide the heat exchange box (100) into several airflow channels (207). The air inlet pipe (104) is connected to the beginning of the airflow channel (207), and the air outlet pipe (105) is connected to the end of the airflow channel (207). A vent (205) is provided on one side of the bend position of the upper airflow baffle (203) and the lower airflow baffle (202). The vent (205) connects the adjacent airflow channels (207). The lower end of the upper airflow baffle (203) and the upper end of the lower airflow baffle (202) are provided with corresponding positioning notches (204). The positioning notches (204) are joined to form a circular hole. The outer surface of the heat exchange copper tube (201) is in contact with the inner wall of the circular hole.

6. A waste heat recovery device for chemical industrial waste gas according to claim 5, characterized in that, The upper airflow baffle (203) has a lower fitting part (2021) at the middle of the bend position. The upper end of the lower fitting part (2021) has a positioning hole. The upper airflow baffle (2033) has an upper fitting part (2031) at the middle of the bend position. The lower end of the upper airflow baffle (2033) has a positioning pin (2032) which is inserted into the positioning hole.

Images