A steam boiler flue gas treatment and waste heat recovery device

Abstract

This invention belongs to the field of steam boiler flue gas treatment technology, specifically relating to a steam boiler flue gas treatment and waste heat recovery device. It includes a base, a pretreatment component mounted on the top of the base via a bracket, a main air inlet pipe mounted on one side of the pretreatment component, a desulfurization tower mounted on the top of the base near the pretreatment component, with one bottom end of the desulfurization tower connected to the pretreatment component, a first connecting pipe (a tee pipe) mounted on one side of the desulfurization tower, and a first diverter valve installed inside the first connecting pipe. A gas heat exchange component is mounted on one side of the top of the base, connected to one end of the first connecting pipe, and a liquid heat exchange component is mounted on the other side of the top of the base. This device filters and blocks solid particles carried in the flue gas and allows for quick disassembly, cleaning, and replacement of the pretreatment component and internal dust collection bags, thereby reducing the entry of solid particles and dust into the device and lowering maintenance costs.

Description

Technical Field

[0001] This invention belongs to the field of steam boiler flue gas treatment technology, and more specifically, relates to a steam boiler flue gas treatment and waste heat recovery device. Background Technology

[0002] Flue gas typically contains pollutants such as carbon dioxide and carbon monoxide. Steam boiler flue gas treatment refers to the process of purifying and treating the exhaust gas (flue gas) generated by the combustion of steam boilers. The purpose is to reduce the emission of harmful substances in the flue gas, meet environmental protection standards, and protect the environment and human health.

[0003] In the process of flue gas treatment in steam boilers, incomplete combustion of flue gas can easily produce solid particles and dust. Solid particles and dust enter the treatment device with the airflow, which can increase the cleaning frequency of the device. In addition, flue gas can generate a lot of heat during combustion and treatment. Failure to recover the heat in time can lead to energy waste. Furthermore, when performing liquid heat exchange, long-term heating can easily cause scale accumulation, which affects the heat exchange efficiency.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a steam boiler flue gas treatment and waste heat recovery device in order to achieve a more practical purpose. Summary of the Invention

[0005] The purpose of this invention is to provide a steam boiler flue gas treatment and waste heat recovery device to solve the above-mentioned problems.

[0006] To achieve the above objectives, this application employs the following technical solution:

[0007] A steam boiler flue gas treatment and waste heat recovery device includes a base. A pretreatment component is mounted on the top of the base via a bracket. A main air inlet pipe is installed on one side of the pretreatment component. A desulfurization tower is installed on the top of the base near the pretreatment component, and the bottom end of one side of the desulfurization tower is connected to the pretreatment component. A first connecting pipe, which is a tee pipe, is installed on one side of the desulfurization tower. A first diverter valve is installed inside the first connecting pipe. A gas heat exchange component is installed on one side of the top of the base, and the gas heat exchange component is connected to one end of the first connecting pipe. A liquid heat exchange component is installed on the other side of the top of the base, and the liquid heat exchange component is connected to the other end of the first connecting pipe. A second connecting pipe, which is a tee pipe, is mounted on the top of the base away from the pretreatment component via a bracket. The second connecting pipe is connected to both the gas heat exchange component and the liquid heat exchange component. A second diverter valve is installed inside the second connecting pipe. A fixing component is installed on the top of the base near the liquid heat exchange component.

[0008] Furthermore, the pretreatment component includes a pretreatment box with an opening at the top. A cover plate is bolted into the opening, and a lower mounting plate is mounted on the bottom of the cover plate via a bracket. The lower mounting plate extends to the bottom of the pretreatment box. Several second mounting plates are installed between the cover plate and the lower mounting plate. Several through grooves are provided on the surface of the second mounting plates, and dust collection bags are threaded into the through grooves.

[0009] Furthermore, a sealing ring is installed on one side of the through groove, and the sealing ring is in close contact with one side of the dust collection bag.

[0010] Furthermore, the gas heat exchange assembly includes a lower heat exchange box, an upper heat exchange box, and a first air pump. The lower heat exchange box is connected to the first connecting pipe and the second connecting pipe, respectively. The upper heat exchange box is installed at the top of the lower heat exchange box. A first air inlet pipe is installed on one side of the first air pump and is connected to the upper heat exchange box. A first exhaust pipe is installed at one end of the upper heat exchange box. A heat exchange rod is installed between the lower heat exchange box and the upper heat exchange box.

[0011] Furthermore, the liquid heat exchange assembly includes a liquid heat exchange tank, a first liquid inlet pipe is installed on one side of the top of the liquid heat exchange tank, a second liquid inlet pipe is installed on the other side of the top of the liquid heat exchange tank, a coil is installed inside the liquid heat exchange tank, and the two ends of the coil are respectively connected to the first connecting pipe and the second connecting pipe, a pair of connecting seats are symmetrically installed on both sides of the liquid heat exchange tank, each pair of connecting seats is provided with a limiting groove on the opposite side, a pair of casters are installed at the bottom of each pair of connecting seats, and a drain pipe is installed on one side of the bottom of the liquid heat exchange tank.

[0012] Furthermore, the fixing assembly includes a pair of first mounting seats and a pair of connecting grooves. The pair of connecting grooves are located on one side of the base below the pair of connecting seats. The pair of first mounting seats are symmetrically installed on the top of the base on both sides of the liquid heat exchange box. Each pair of first mounting seats has a sliding groove on its opposite side. A limiting block is slidably installed in the sliding groove, and the position and size of the limiting block match the position and size of the limiting groove. A driving assembly is installed in the sliding groove.

[0013] Furthermore, the drive assembly includes a threaded rod, which is rotatably mounted in the slide groove via a bearing seat, and the threaded rod passes through one side of the limiting block and is threadedly connected to the limiting block.

[0014] Furthermore, a motor is mounted on one side of the first mounting base, and the output end of the motor is connected to the threaded rod via a coupling.

[0015] Furthermore, a controller is installed on one side of the top of the base.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The steam boiler flue gas treatment and waste heat recovery device of the present invention, through the cooperation of the base and the pretreatment component, facilitates the blocking and filtration of solid particles carried in the flue gas before treating the steam boiler flue gas, and allows for the quick disassembly, cleaning and replacement of the pretreatment component and the internal dust collection bag, thereby reducing the entry of solid particles and dust into the device and lowering maintenance costs.

[0018] 2. The steam boiler flue gas treatment and waste heat recovery device of the present invention, through the coordinated use of a desulfurization tower, a main air inlet pipe, a first connecting pipe, a first diversion valve, a gas heat exchange component, a liquid heat exchange component, a second connecting pipe, a second diversion valve, a fixed component, and a controller, facilitates the selection of gas heat exchange, liquid heat exchange, or simultaneous operation according to the waste heat recovery requirements. This allows the device to adapt to different waste heat recovery needs, thereby improving energy utilization efficiency and expanding the applicability of waste heat recovery and utilization.

[0019] 3. The steam boiler flue gas treatment and waste heat recovery device of the present invention, through the combined use of liquid heat exchange components and fixing components, facilitates the quick fixing or disassembly of the liquid heat exchange box, makes it convenient for staff to clean, reduces the impact of scale accumulation on heat exchange efficiency, thereby reducing cleaning costs and improving liquid heat exchange efficiency. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0021] Figure 2 This is a three-dimensional exploded view of the pretreatment component of the present invention.

[0022] Figure 3 This is a three-dimensional exploded view of the second mounting plate structure of the present invention.

[0023] Figure 4 This is a three-dimensional cross-sectional view of the liquid heat exchange component of the present invention.

[0024] Figure 5 This is a three-dimensional cross-sectional view of the fixing component of the present invention.

[0025] Figure 6 This is a three-dimensional cross-sectional view of the gas heat exchange component of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Base; 2. Pretreatment assembly; 201. Pretreatment box; 202. Opening; 203. Cover plate; 204. Lower mounting plate; 205. Second mounting plate; 206. Through groove; 207. Dust collection bag; 208. Sealing ring; 3. Main air inlet pipe; 4. Desulfurization tower; 5. First connecting pipe; 6. First diversion valve; 7. Gas heat exchange assembly; 701. Lower heat exchange box; 702. Upper heat exchange box; 703. First air pump; 704. First air inlet pipe; 705. First exhaust pipe; 706. 8. Heat exchanger rod; 801. Liquid heat exchange assembly; 802. Liquid heat exchange box; 803. First liquid inlet pipe; 804. Second liquid inlet pipe; 805. Coil; 806. Connecting seat; 807. Limiting groove; 808. Caster wheel; 809. Drain pipe; 10. Second connecting pipe; 11. Second diverter valve; 11. Fixing assembly; 1101. First mounting seat; 1102. Connecting groove; 1103. Slide groove; 1104. Limiting block; 1105. Threaded rod; 1106. Motor; 12. Controller. Detailed Implementation

[0028] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0029] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] As attached Figure 1 To be continued Figure 6As shown: This invention provides a steam boiler flue gas treatment and waste heat recovery device, including a base 1, which is bolted to a designated position. A pretreatment component 2 is mounted on the top of the base 1 via a bracket to pretreat the flue gas, reducing the amount of solid particulate matter entering the device. A main inlet pipe 3 is installed on one side of the pretreatment component 2, connected to a pre-treatment pipe via a flange to introduce gas into the device. A desulfurization tower 4 is installed on the top of the base 1 near the pretreatment component 2, with its bottom end connected to the pretreatment component 2. The desulfurization tower 4 can treat the gas using a spray method. A first connecting pipe 5, which is a tee pipe, is installed on one side of the desulfurization tower 4. A first diversion valve 6 is installed inside the first connecting pipe 5, adjusting the flow direction of the first connecting pipe 5 by rotating the valve plate. A gas heat exchange component 7 is installed on one side, and the gas heat exchange component 7 is connected to one end of the first connecting pipe 5 for gas heat exchange. A liquid heat exchange component 8 is installed on the other side of the top of the base 1, and the liquid heat exchange component 8 is connected to the other end of the first connecting pipe 5 for liquid heat exchange. A second connecting pipe 9 is installed on the top of the base 1 away from the pretreatment component 2 via a bracket. The second connecting pipe 9 is a tee pipe and is connected to both the gas heat exchange component 7 and the liquid heat exchange component 8. A second diversion valve 10 is installed inside the second connecting pipe 9. The second diversion valve 10 adjusts the flow direction of the second connecting pipe 9 by rotating the valve plate. The other end of the second connecting pipe 9 is connected to a downstream pipe via a flange for connecting the device to a subsequent treatment device or a discharge device. A fixing component 11 is installed on the top of the base 1 near the liquid heat exchange component 8.

[0032] It is important to note that air pumps for guiding are added at the front or rear of the device or at appropriate locations inside to facilitate the direction of gas flow inside the device, and all connections between different pipes are made by flanges with sealing gaskets.

[0033] The pretreatment component 2 includes a pretreatment box 201. The top of the pretreatment box 201 has an opening 202. A cover plate 203 is installed in the opening 202 by bolts. A lower mounting plate 204 is installed at the bottom of the cover plate 203 by a bracket. The lower mounting plate 204 extends to the bottom of the pretreatment box 201. A number of second mounting plates 205 are installed between the cover plate 203 and the lower mounting plate 204. A number of through grooves 206 are provided on the surface of the second mounting plates 205. A dust collection bag 207 is threadedly connected in the through grooves 206.

[0034] A sealing ring 208 is installed on one side of the through groove 206, and the sealing ring 208 is in close contact with one side of the dust collection bag 207.

[0035] It should be noted that a sealing gasket is provided at the bottom of the cover plate 203 where it contacts the opening 202 to ensure the airtightness of the pretreatment box 201. The size of the dust collection bag 207 is determined according to the actual flue gas treatment situation. The dust collection bag 207 can filter solid particles carried in the flue gas. After the dust collection bag 207 is screwed into the through groove 206, it is tightly attached to the sealing ring 208.

[0036] The gas heat exchange assembly 7 includes a lower heat exchange box 701, an upper heat exchange box 702, and a first air pump 703. The lower heat exchange box 701 is connected to the first connecting pipe 5 and the second connecting pipe 9. The upper heat exchange box 702 is installed at the top of the lower heat exchange box 701. A first air inlet pipe 704 is installed on one side of the first air pump 703 and is connected to the upper heat exchange box 702. A first exhaust pipe 705 is installed at one end of the upper heat exchange box 702. A heat exchange rod 706 is installed between the lower heat exchange box 701 and the upper heat exchange box 702.

[0037] It should be noted that the two ends of the heat exchange rod 706 are located in the lower heat exchange box 701 and the upper heat exchange box 702, respectively. After the high-temperature gas enters the lower heat exchange box 701, it transfers heat to the upper heat exchange box 702 through the heat exchange rod 706. The first air pump 703 inputs the low-temperature gas from the outside into the upper heat exchange box 702 and then discharges it from the first exhaust pipe 705.

[0038] The liquid heat exchange assembly 8 includes a liquid heat exchange box 801. A first liquid inlet pipe 802 is installed on one side of the top of the liquid heat exchange box 801, and a second liquid inlet pipe 803 is installed on the other side of the top of the liquid heat exchange box 801. A coil 804 is installed inside the liquid heat exchange box 801, and the two ends of the coil 804 are respectively connected to the first connecting pipe 5 and the second connecting pipe 9. A pair of connecting seats 805 are symmetrically installed on both sides of the liquid heat exchange box 801. Each pair of connecting seats 805 has a limiting groove 806 on the opposite side. A pair of casters 807 are installed at the bottom of each pair of connecting seats 805. A drain pipe 808 is installed on one side of the bottom of the liquid heat exchange box 801.

[0039] It should be noted that the number of sections of coil 804 is selected according to the actual processing requirements to extend the gas flow time in liquid heat exchange box 801. The liquid discharge pipe 808, which is set at the bottom of one side of liquid heat exchange box 801, is connected to the rear device. The first liquid inlet pipe 802 is used to input the liquid to be heated into liquid heat exchange box 801, and the second liquid inlet pipe 803 is used to output the reaction liquid used to clean scale into liquid heat exchange box 801, thereby facilitating scale cleaning. A switchable door can be installed on the top of liquid heat exchange box 801.

[0040] The fixing component 11 includes a pair of first mounting seats 1101 and a pair of connecting grooves 1102. The pair of connecting grooves 1102 are located on one side of the base 1 below the pair of connecting seats 805. The pair of first mounting seats 1101 are symmetrically installed on the top of the base 1 on both sides of the liquid heat exchange box 801. Each pair of first mounting seats 1101 has a sliding groove 1103 on its opposite side. A limiting block 1104 is slidably installed in the sliding groove 1103, and the position and size of the limiting block 1104 are matched with the position and size of the limiting groove 806. A driving component is installed in the sliding groove 1103.

[0041] The drive assembly includes a threaded rod 1105, which is rotatably mounted in the slide groove 1103 via a bearing seat, and the threaded rod 1105 passes through one side of the limiting block 1104 and is threadedly connected to the limiting block 1104.

[0042] Among them, a motor 1106 is installed on one side of the first mounting base 1101, and the output end of the motor 1106 is connected to the threaded rod 1105 through a coupling.

[0043] It should be noted that the motor 1106 drives the threaded rod 1105 to rotate. Under the limiting action of the slide groove 1103, the limiting block 1104 moves and gets into the limiting groove 806, thereby fixing the liquid heat exchange box 801. The caster 807 can enter the connecting groove 1102 from the ground, making it convenient for workers to push the liquid heat exchange box 801 and thus facilitate its cleaning. When it is necessary to clean the liquid heat exchange box 801, the workers remove the various pipe connections, then control the limiting block 1104 to disengage from the limiting groove 806, and finally push the liquid heat exchange box 801 to remove it.

[0044] The controller 12 is installed on one side of the top of the base 1.

[0045] It should be noted that the controller 12 is electrically connected to the desulfurization tower 4, the first diversion valve 6, the second diversion valve 10, the air pump, the heat exchange rod 706, the motor 1106, and other electrical components, which facilitates the control of the overall circuit of the device.

[0046] The working principle of this embodiment is as follows: When using this steam boiler flue gas treatment and waste heat recovery device, the operator first connects the device to the power supply and connects it to the pre- and post-processing devices. After the connection is completed, the operator introduces the flue gas into the device. The dust collection bag 207 inside the pretreatment box 201 can capture and filter solid particles in the flue gas. The filtered gas enters the desulfurization tower 4 for harmful gas desorption. The desorbed gas enters the first connecting pipe 5 with the airflow. The operator can control the opening and closing position of the first diversion valve 6 according to the waste heat recovery requirements. When the gas enters the gas heat exchange box, the heat exchange rod 706 transfers heat to the upper heat exchange box 702. At the same time, the first air pump 703 inputs low-temperature gas from the outside into the upper heat exchange box 702 and then discharges it from the first exhaust pipe 705, realizing gas heat exchange. When the gas enters the liquid heat exchange box 801, the high-temperature gas... The liquid in the liquid heat exchanger 801 is heated by the coil 804. After heating, the liquid is discharged from the drain pipe 808, and the gas is discharged from the second connecting pipe 9. When a lot of scale accumulates in the liquid heat exchanger 801, the operator can turn on the motor 1106. The motor 1106 drives the threaded rod 1105 to rotate. Under the limiting action of the slide groove 1103, the limiting block 1104 moves and disengages from the limiting groove 806. Then, the operator can disassemble and separate the various pipes and push the liquid heat exchanger 801 to remove it. After removal, the operator can clean the scale by adding chemical reaction solution or by direct cleaning. When it is necessary to clean the dust collection bag 207, the operator removes the bolts on the cover plate 203, then pulls the cover plate 203 upwards to remove it. Finally, the dust collection bag 207 can be rotated to remove it from the through groove 206 for easy cleaning.

[0047] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A steam boiler flue gas treatment and waste heat recovery device, comprising a base, characterized in that, A pretreatment component is mounted on the top of the base via a bracket. A main air inlet pipe is mounted on one side of the pretreatment component. A desulfurization tower is mounted on the top of the base near the pretreatment component, and the bottom end of one side of the desulfurization tower is connected to the pretreatment component. A first connecting pipe, which is a tee pipe, is mounted on one side of the desulfurization tower. A first diverter valve is installed inside the first connecting pipe. A gas heat exchange component is mounted on one side of the top of the base, and the gas heat exchange component is connected to one end of the first connecting pipe. A liquid heat exchange component is mounted on the other side of the top of the base, and the liquid heat exchange component is connected to the other end of the first connecting pipe. A second connecting pipe, which is a tee pipe, is mounted on the top of the base away from the pretreatment component via a bracket. The second connecting pipe is connected to both the gas heat exchange component and the liquid heat exchange component. A second diverter valve is installed inside the second connecting pipe. A fixing component is mounted on the top of the base near the liquid heat exchange component.

2. The steam boiler flue gas treatment and waste heat recovery device according to claim 1, characterized in that, The pretreatment assembly includes a pretreatment box with an opening at the top. A cover plate is bolted into the opening, and a lower mounting plate is mounted on the bottom of the cover plate via a bracket. The lower mounting plate extends to the bottom of the pretreatment box. Several second mounting plates are installed between the cover plate and the lower mounting plate. Several through grooves are provided on the surface of the second mounting plates, and dust collection bags are threaded into the through grooves.

3. The steam boiler flue gas treatment and waste heat recovery device according to claim 2, characterized in that, A sealing ring is installed on one side of the through groove, and the sealing ring is in close contact with one side of the dust collection bag.

4. The steam boiler flue gas treatment and waste heat recovery device according to claim 1, characterized in that, The gas heat exchange assembly includes a lower heat exchange box, an upper heat exchange box, and a first air pump. The lower heat exchange box is connected to the first connecting pipe and the second connecting pipe. The upper heat exchange box is installed at the top of the lower heat exchange box. A first air inlet pipe is installed on one side of the first air pump and is connected to the upper heat exchange box. A first exhaust pipe is installed at one end of the upper heat exchange box. A heat exchange rod is installed between the lower heat exchange box and the upper heat exchange box.

5. The steam boiler flue gas treatment and waste heat recovery device according to claim 1, characterized in that, The liquid heat exchange assembly includes a liquid heat exchange tank. A first liquid inlet pipe is installed on one side of the top of the liquid heat exchange tank, and a second liquid inlet pipe is installed on the other side of the top of the liquid heat exchange tank. A coil is installed inside the liquid heat exchange tank, and the two ends of the coil are respectively connected to the first connecting pipe and the second connecting pipe. A pair of connecting seats are symmetrically installed on both sides of the liquid heat exchange tank. Each pair of connecting seats has a limiting groove on its opposite side. A pair of casters are installed at the bottom of each pair of connecting seats. A drain pipe is installed on one side of the bottom of the liquid heat exchange tank.

6. The steam boiler flue gas treatment and waste heat recovery device according to claim 5, characterized in that, The fixing assembly includes a pair of first mounting seats and a pair of connecting slots. The pair of connecting slots are located on one side of the base below the pair of connecting seats. The pair of first mounting seats are symmetrically installed on the top of the base on both sides of the liquid heat exchange box. Each pair of first mounting seats has a sliding groove on its opposite side. A limiting block is slidably installed in the sliding groove, and the position and size of the limiting block match the position and size of the limiting groove. A driving assembly is installed in the sliding groove.

7. The steam boiler flue gas treatment and waste heat recovery device according to claim 6, characterized in that, The drive assembly includes a threaded rod, which is rotatably mounted in the slide groove via a bearing seat, and the threaded rod passes through one side of the limiting block and is threadedly connected to the limiting block.

8. The steam boiler flue gas treatment and waste heat recovery device according to claim 7, characterized in that, A motor is mounted on one side of the first mounting base, and the output end of the motor is connected to the threaded rod via a coupling.

9. The steam boiler flue gas treatment and waste heat recovery device according to claim 1, characterized in that, A controller is installed on one side of the top of the base.

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