A waste heat recovery device for denitration and desulfurization
Patent Information
- Application Number
- CN202522198412.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-17
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-17
AI Technical Summary
[0005]针对现有技术的不足，本实用新型提供了一种脱硝脱硫的余热回收设备，解决了在实际使用时，由于脱硫装置和热回收装置分开设置，导致占地面积过大，投资的成本过高，并脱硝脱硫与余热回收集成的设备，存在脱硝脱硫效率低、余热回收不充分等问题，难以满足日益严格的环保要求和能源利用需求的问题
本实用新型提供了一种脱硝脱硫的余热回收设备。具备以下有益效果：该脱硝脱硫的余热回收设备通过热回收装置、连接管和循环管的配合，当气体在喷淋塔内完成脱硫和脱硝处理之后，会通过排气管排出，而在排气管排气的过程中，气体中的热量会传递给循环管内的水，并且在保温垫的作用下，能够最大限度的防止热量流失，同时，吸收完热量的水会通过连接管排出，进行后续使用，解决了脱硝脱硫效率低、余热回收不充分等问题，难以满足日益严格的环保要求和能源利用需求的问题。
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Figure CN224802213U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste heat recovery technology, specifically a waste heat recovery device for denitrification and desulfurization. Background Technology
[0002] Many industrial production processes, such as thermal power generation, steel smelting, and chemical production, generate large amounts of high-temperature waste gas containing nitrogen oxides and sulfur dioxide. Direct emission of these waste gases will pollute the atmospheric environment. At the same time, the large amount of waste heat contained in the high-temperature waste gas will result in energy waste if it is not recovered and utilized.
[0003] In existing technologies, the waste heat recovery device is installed near the desulfurization unit, and the waste heat recovery device and the desulfurization unit are connected together through pipelines to fully recover the waste heat of the gas inside.
[0004] However, in actual use, the separate installation of desulfurization and heat recovery devices results in excessive floor space and high investment costs. Furthermore, equipment that integrates denitrification, desulfurization, and waste heat recovery suffers from problems such as low denitrification and desulfurization efficiency and insufficient waste heat recovery, making it difficult to meet increasingly stringent environmental protection requirements and energy utilization demands. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a waste heat recovery device for denitrification and desulfurization. This solves the problems that, in practical use, the separate installation of desulfurization and heat recovery devices leads to excessive floor space and high investment costs. Furthermore, devices that integrate denitrification, desulfurization, and waste heat recovery suffer from low denitrification and desulfurization efficiency and insufficient waste heat recovery, making it difficult to meet increasingly stringent environmental protection requirements and energy utilization demands.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for denitrification and desulfurization, comprising a spray tower, a spray pipe disposed at the top of the interior of the spray tower, and an exhaust pipe connected to the lower outer wall of the spray tower. The waste heat recovery device further includes a heat recovery unit installed on the outer wall of the exhaust pipe; a chemical supply unit installed at one end of the spray pipe; a filter unit disposed below the spray pipe; and a recovery unit installed at the bottom of the spray tower. The heat recovery unit recovers waste heat from the gas, the chemical supply unit supplies chemicals to the spray pipe, the filter unit filters the liquid, and the recovery unit recycles the waste liquid.
[0007] Preferably, the heat recovery device includes a connecting pipe disposed below the exhaust pipe; a fixed shell disposed on the outer wall of the exhaust pipe and fixedly connected to the outer wall of the spray tower, with its inner wall respectively fitted onto the outer walls of the connecting pipe and the exhaust pipe; a heat insulation pad fixedly connected to the inner wall of the fixed shell, with its inner wall fitted onto the outer wall of the connecting pipe; and a circulation pipe fixedly connected to the outer wall of the exhaust pipe, with its outer wall adhering to the inner wall of the heat insulation pad; wherein, through the cooperation of the connecting pipe and the circulation pipe, heat recovery is performed on the gas in the exhaust pipe, and the fixed shell and the heat insulation pad insulate the circulation pipe.
[0008] Preferably, the inner wall of the exhaust pipe is provided with an exhaust fan, and the outer wall of the exhaust fan is fixedly connected to the inner wall of the exhaust pipe.
[0009] Preferably, the drug supply device includes a diversion pipe connected to one end of the spray pipe extending to the outside of the spray tower; the pump output end is connected to the end of the diversion pipe; the drug tank is fixedly connected to the top of the fixed shell and to the outer wall of the pump body, and is connected to the input end of the pump body; wherein, through the cooperation of the diversion pipe and the pump body, the drug in the drug tank is sprayed out through the spray pipe.
[0010] Preferably, the filtration device includes a mounting frame that is snapped onto the upper inner wall of the spray tower; a Pall ring that is fixedly connected to the upper inner wall of the mounting frame; a stepped ring that fits against the bottom of the Pall ring and is fixedly connected to the inner wall of the mounting frame; and a baffle demister that fits against the bottom of the stepped ring and is fixedly connected to the inner wall of the mounting frame. The Pall ring and the stepped ring ensure sufficient contact between the gas and the chemical solution, the baffle demister removes mist droplets from the gas, and the mounting frame supports the Pall ring.
[0011] Preferably, the recycling device includes a recycling box inserted into the bottom of the spray tower; a filter screen installed on the upper inner wall of the recycling box; and a baffle plate disposed above the filter screen and rotatably connected to the lower inner wall of the spray tower via a pin. Waste liquid is recycled through the recycling box and the filter screen, and the baffle plate separates the spray tower from the recycling box.
[0012] Beneficial effects This utility model provides a waste heat recovery device for denitrification and desulfurization. It has the following beneficial effects: Through the cooperation of a heat recovery unit, connecting pipes, and circulation pipes, after the gas completes desulfurization and denitrification treatment in the spray tower, it is discharged through the exhaust pipe. During the exhaust process, the heat in the gas is transferred to the water in the circulation pipe, and the insulation pads effectively prevent heat loss. Simultaneously, the water that has absorbed the heat is discharged through the connecting pipes for subsequent use. This solves the problems of low denitrification and desulfurization efficiency and insufficient waste heat recovery, which are insufficient to meet increasingly stringent environmental protection requirements and energy utilization demands.
[0013] By coordinating the diversion pipe, pump body, and chemical tank, chemical solution is placed in the chemical tank and pumped to the spray pipe. The spray pipe then sprays the chemical solution onto the gas in the spray tower, ensuring full contact between the gas and the chemical solution. This allows the heat recovery device to fully recover the heat from the gas after thorough desulfurization and denitrification, solving the problems of low denitrification and desulfurization efficiency and insufficient waste heat recovery in existing systems. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the appearance of the present utility model; Figure 3 for Figure 1 A structural diagram of the central exhaust fan, exhaust pipe, and mounting housing; Figure 4 for Figure 1 Structural diagram of the spray tower, spray pipes, and mounting frame; Figure 5 for Figure 1 A schematic diagram of the structure of the recycling bin, baffle, and spray tower.
[0015] In the diagram: 1. Spray tower; 2. Spray pipe; 3. Exhaust pipe; 4. Heat recovery device; 41. Connecting pipe; 42. Fixed shell; 43. Insulation pad; 44. Circulation pipe; 5. Drug supply device; 51. Diverter pipe; 52. Pump body; 53. Drug tank; 6. Filter device; 61. Mounting frame; 62. Pall ring; 63. Stepped ring; 64. Baffle demister; 7. Recovery device; 71. Recovery box; 72. Filter screen; 73. Baffle; 8. Exhaust fan. Detailed Implementation
[0016] 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.
[0017] In practical use, the separate installation of desulfurization and heat recovery devices results in excessive floor space and high investment costs. Furthermore, equipment that integrates denitrification, desulfurization, and waste heat recovery suffers from problems such as low denitrification and desulfurization efficiency and insufficient waste heat recovery, making it difficult to meet increasingly stringent environmental protection requirements and energy utilization demands.
[0018] In view of this, the present invention provides a waste heat recovery device for denitrification and desulfurization, which solves the problems of excessive floor space and high investment cost caused by the separate setting of desulfurization device and heat recovery device in actual use, and the problems of low denitrification and desulfurization efficiency and insufficient waste heat recovery in the integrated denitrification and desulfurization and waste heat recovery device, which are difficult to meet the increasingly stringent environmental protection requirements and energy utilization needs.
[0019] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.
[0020] Example 1: By Figure 1-4 It is known that a waste heat recovery device for denitrification and desulfurization includes a spray tower 1, a spray pipe 2 installed at the top inside the spray tower 1, and an exhaust pipe 3 connected to the bottom of the outer wall of the spray tower 1. The waste heat recovery device for denitrification and desulfurization also includes a heat recovery device 4, a chemical supply device 5, a filter device 6, and a recovery device 7. The heat recovery device 4 is installed on the outer wall of the exhaust pipe 3; the chemical supply device 5 is installed at one end of the spray pipe 2; the filter device 6 is located below the spray pipe 2; and the recovery device 7 is installed at the bottom of the spray tower 1. The heat recovery device 4 recovers the waste heat of the gas, the chemical supply device 5 supplies chemicals to the spray pipe 2, the filter device 6 filters the liquid, and the recovery device 7 recovers the waste liquid. In the specific implementation process, it is worth noting that after the gas enters the spray pipe 2, the liquid sprayed from the spray pipe 2 will come into full contact with the gas to remove sulfur and nitrate from the gas. At the same time, after the gas comes into contact with the chemical solution, it will pass through the filter device 6 to ensure that the gas and chemical solution come into full contact, ensuring the removal of sulfur and nitrate from the gas. The heat in the gas will be recovered through the heat recovery device 4, and the wastewater generated by desulfurization and denitrification will be recovered by the recovery device 7, which is convenient for subsequent treatment. Furthermore, the heat recovery device 4 includes a connecting pipe 41, a fixed shell 42, an insulation pad 43, and a circulation pipe 44. The connecting pipe 41 is located below the exhaust pipe 3; the fixed shell 42 is located on the outer wall of the exhaust pipe 3 and is fixedly connected to the outer wall of the spray tower 1, with its inner wall respectively fitted onto the outer walls of the connecting pipe 41 and the exhaust pipe 3; the insulation pad 43 is fixedly connected to the inner wall of the fixed shell 42, with its inner wall fitted onto the outer wall of the connecting pipe 41; the circulation pipe 44 is fixedly connected to the outer wall of the exhaust pipe 3, with its outer wall adhering to the inner wall of the insulation pad 43; wherein, through the cooperation of the connecting pipe 41 and the circulation pipe 44, heat recovery is performed on the gas in the exhaust pipe 3, and the fixed shell 42 and the insulation pad 43 insulate the circulation pipe 44. In the specific implementation process, it is worth noting that there are two connecting pipes 41, one is an inlet pipe and the other is an outlet pipe. This ensures that the water in the circulation pipe 44 absorbs the heat of the gas in the exhaust pipe 3. The insulation pad 43 will wrap the circulation pipe 44 and the exhaust pipe 3 to prevent heat loss and make heat recovery more complete. The fixing shell 42 will wrap the insulation pad 43 to ensure that it can wrap the circulation pipe 44. Furthermore, an exhaust fan 8 is provided on the inner wall of the exhaust pipe 3, and the outer wall of the exhaust fan 8 is fixedly connected to the inner wall of the exhaust pipe 3. In the specific implementation process, it is worth noting that the exhaust fan 8 is used to exhaust the gas in the spray tower 1. The model of the exhaust fan 8 is not limited, as long as it meets the actual use requirements.
[0021] Example 2: From Figure 1-4 It is known that the drug supply device 5 includes a diversion pipe 51, a pump body 52, and a drug tank 53. The diversion pipe 51 is connected to one end of the spray pipe 2 extending to the outside of the spray tower 1; the output end of the pump body 52 is connected to the end of the diversion pipe 51; the drug tank 53 is fixedly connected to the top of the fixed shell 42 and to the outer wall of the pump body 52, and is connected to the input end of the pump body 52; wherein, through the cooperation of the diversion pipe 51 and the pump body 52, the drug in the drug tank 53 is sprayed out through the spray pipe 2. In the specific implementation process, it is worth noting that the medicine tank 53 is used to hold the medicine, and the medicine in the medicine tank 53 is transported to the spray pipe 2 through the pump body 52, and then sprayed out by the spray pipe 2 so that the gas comes into contact with the medicine and removes the sulfur and nitrate in the gas. The model of the pump body 52 is not limited, as long as it meets the actual use. Furthermore, the filtration device 6 includes a mounting frame 61, a Pall ring 62, a stepped ring 63, and a baffle demister 64. The mounting frame 61 is snapped onto the upper inner wall of the spray tower 1; the Pall ring 62 is fixedly connected to the upper inner wall of the mounting frame 61; the stepped ring 63 is attached to the bottom of the Pall ring 62 and fixedly connected to the inner wall of the mounting frame 61; the baffle demister 64 is attached to the bottom of the stepped ring 63 and fixedly connected to the inner wall of the mounting frame 61. The Pall ring 62 and the stepped ring 63 ensure sufficient contact between the gas and the chemical solution, the baffle demister 64 removes mist droplets from the gas, and the mounting frame 61 supports the Pall ring 62. In the specific implementation process, it is worth noting that the spherical suspension packing material of the Pall ring 62 allows the gas and liquid to fully contact each other when passing through the Pall ring 62, thus better removing sulfur and nitrate. The stepped ring 63 reduces the resistance of gas passing through the bed and increases the throughput. The packing also has high strength. Due to its structural characteristics, the packing layers have multiple point contacts, increasing the contact area between gas and liquid and improving the efficiency of sulfur and nitrate removal. The baffle plate demister 64 removes mist droplets from the gas, preventing the mist droplets from affecting the heat recovery device 4 along with the gas. Furthermore, the recovery device 7 includes a recovery box 71, a filter screen 72, and a baffle 73. The recovery box 71 is inserted into the bottom of the spray tower 1; the filter screen 72 is installed on the upper inner wall of the recovery box 71; the baffle 73 is disposed above the filter screen 72 and is rotatably connected to the lower inner wall of the spray tower 1 by a pin; wherein, the waste liquid is recovered through the recovery box 71 and the filter screen 72, and the baffle 73 separates the spray tower 1 from the recovery box 71. In the specific implementation process, it is worth noting that a torsion spring is installed between the baffle 73 and the spray tower 1. In this way, when the baffle 73 is not squeezed by the wastewater, it separates the spray tower 1 and the recovery box 71, preventing gas from entering the recovery box 71. Moreover, the filter screen 72 will remove impurities in the liquid, avoiding inconvenience when cleaning the recovery box 71.
[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A waste heat recovery device for denitrification and desulfurization, comprising a spray tower (1), characterized in that: A spray pipe (2) is installed at the top inside the spray tower (1), and an exhaust pipe (3) is connected to the bottom of the outer wall of the spray tower (1). The waste heat recovery equipment for denitrification and desulfurization also includes: A heat recovery device (4) is installed on the outer wall of the exhaust pipe (3); The drug supply device (5) is installed at one end of the spray pipe (2); A filter device (6) is installed below the spray pipe (2); A recycling device (7) is installed at the bottom of the spray tower (1); Among them, the heat recovery device (4) recovers the waste heat of the gas, the drug supply device (5) supplies the drug to the spray pipe (2), the filtration device (6) filters the liquid, and the recovery device (7) recovers the waste liquid.
2. The waste heat recovery equipment for denitrification and desulfurization according to claim 1, characterized in that: The heat recovery device (4) includes: A connecting pipe (41) is located below the exhaust pipe (3); The fixed shell (42) is set on the outer wall of the exhaust pipe (3) and fixedly connected to the outer wall of the spray tower (1), and the inner wall is respectively sleeved on the outer wall of the connecting pipe (41) and the exhaust pipe (3); The heat insulation pad (43) is fixedly connected to the inner wall of the fixed shell (42), and the inner wall is sleeved on the outer wall of the connecting pipe (41); The circulation pipe (44) is fixedly connected to the outer wall of the exhaust pipe (3), and the outer wall is attached to the inner wall of the heat insulation pad (43); The gas in the exhaust pipe (3) is heat recovered through the cooperation of the connecting pipe (41) and the circulation pipe (44), and the fixed shell (42) and the heat insulation pad (43) insulate the circulation pipe (44).
3. The waste heat recovery equipment for denitrification and desulfurization according to claim 1, characterized in that: The inner wall of the exhaust pipe (3) is provided with an exhaust fan (8), and the outer wall of the exhaust fan (8) is fixedly connected to the inner wall of the exhaust pipe (3).
4. The waste heat recovery equipment for denitrification and desulfurization according to claim 1, characterized in that: The drug supply device (5) includes: The diversion pipe (51) is connected to one end of the spray pipe (2) extending to the outside of the spray tower (1); The pump body (52) has its output end connected to the end of the split pipe (51); The medicine tank (53) is fixedly connected to the top of the fixed shell (42) and to the outer wall of the pump body (52), and is connected to the input end of the pump body (52); The medicine in the medicine tank (53) is sprayed out through the spray pipe (2) by the cooperation of the diversion pipe (51) and the pump body (52).
5. The waste heat recovery equipment for denitrification and desulfurization according to claim 1, characterized in that: The filter device (6) includes: The mounting frame (61) is snapped onto the upper inner wall of the spray tower (1); A Pall ring (62) is fixedly connected to the upper inner wall of the mounting frame (61); The stepped ring (63) is attached to the bottom of the Pall ring (62) and fixedly connected to the inner wall of the mounting frame (61); The baffle demister (64) is attached to the bottom of the stepped ring (63) and fixedly connected to the inner wall of the mounting frame (61); The gas and the liquid are brought into full contact through the Pall ring (62) and the stepped ring (63), the baffle demister (64) removes the mist droplets in the gas, and the mounting frame (61) supports the Pall ring (62).
6. The waste heat recovery equipment for denitrification and desulfurization according to claim 1, characterized in that: The recycling device (7) includes: The recycling bin (71) is inserted into the bottom of the spray tower (1); A filter screen (72) is installed on the upper inner wall of the recycling bin (71); A baffle (73) is set above the filter screen (72) and is rotatably connected to the lower inner wall of the spray tower (1) via a pin. Waste liquid is recovered through the recovery box (71) and the filter screen (72), and the baffle (73) separates the spray tower (1) from the recovery box (71).