Combined heat exchanger for condensing and white smoke elimination of organic waste gas
Patent Information
- Application Number
- CN202522046618.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-23
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-09-23
AI Technical Summary
但传统冷凝器为了追求回收效率，常需要将温度降至很低（如-20℃以下），能耗极高，且对于废气中的不凝性气体处理效果有限，冷凝后的排气因低温饱和常会形成浓郁的“白色烟羽”（主要成分为水雾和少量气溶胶），视觉污染严重，不符合环保要求
1、本实用新型的预冷机构吸收的废气热量传递给了常温冷却水，使常温冷却水温度升高。这部分被加热的冷却水恰好被用作消白复热段的热源，用于加热深度冷凝后的冷废气。实现了热量的内部循环利用，极大降低了消白所需的额外能耗，提高节能效果。
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Figure CN224838521U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste gas treatment technology, specifically a combined heat exchanger for condensing and eliminating whitening of organic waste gas. Background Technology
[0002] Industries such as chemical processing, spraying, and printing generate large amounts of high-temperature, high-humidity waste gas containing volatile organic compounds (VOCs). Currently, the common treatment method involves cooling the waste gas to below its dew point using a heat exchanger, causing some VOCs and moisture to condense into liquid for recovery. However, traditional condensers, in pursuit of high recovery efficiency, often require very low temperatures (e.g., below -20°C), resulting in extremely high energy consumption. Furthermore, they have limited effectiveness in treating non-condensable gases in the waste gas. The condensed exhaust gas, due to its low-temperature saturation, often forms a dense "white plume" (mainly composed of water mist and a small amount of aerosol), causing severe visual pollution and failing to meet environmental protection requirements.
[0003] In existing technologies, condensation and whitening are usually two separate units. First, the solvent is recovered through a condenser, and then the condensed, low-temperature waste gas is reheated using equipment such as a gas-to-gas heat exchanger (GGH) or steam heating to reduce relative humidity and achieve whitening. This method suffers from high overall energy consumption. To address this issue, we propose a combined heat exchanger for organic waste gas condensation and whitening to solve the aforementioned problems. Utility Model Content
[0004] The purpose of this invention is to provide a combined heat exchanger for condensing and eliminating whitening of organic waste gas, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a combined heat exchanger for condensing and eliminating whitening of organic waste gas, comprising: The system includes a precooling mechanism, a deep condensation mechanism, and a reheating and whitening mechanism. Each of these mechanisms comprises a housing. An air inlet pipe is fixedly installed on one side wall of the housing, an exhaust pipe is fixedly installed on the top of the housing, and a liquid drain pipe is fixedly installed on the bottom of the housing. A refrigerant inlet pipe and a refrigerant outlet pipe are fixedly installed on the housing. A serpentine heat exchange tube is arranged inside the housing, with its two ends connected to the refrigerant inlet pipe and the refrigerant outlet pipe, respectively.
[0006] Preferably, a first air guide pipe is fixedly installed on the exhaust pipe of the precooling mechanism, and the end of the first air guide pipe away from the precooling mechanism is fixedly installed on the air inlet pipe of the deep condensation mechanism.
[0007] Preferably, a second air guide pipe is fixedly installed on the exhaust pipe of the deep condensation mechanism, and the end of the second air guide pipe away from the deep condensation mechanism is fixedly installed on the air inlet pipe of the reheating and whitening mechanism.
[0008] Preferably, a guide pipe is fixedly installed on the refrigerant pipe of the precooling mechanism, and the end of the guide pipe away from the precooling mechanism is fixedly installed on the refrigerant inlet pipe of the reheating and whitening mechanism.
[0009] Preferably, a plurality of staggered baffles are fixedly welded into the inner cavity of the shell.
[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. The pre-cooling mechanism of this invention absorbs heat from the exhaust gas and transfers it to ambient temperature cooling water, raising the temperature of the cooling water. This heated cooling water is then used as a heat source for the whitening and reheating section to heat the cold exhaust gas after deep condensation. This achieves internal heat recycling, greatly reducing the additional energy consumption required for whitening and improving energy efficiency.
[0011] 2. The pre-cooling mechanism of this utility model provides initial treatment, reducing the load during deep condensation; the deep condensation mechanism ensures a high VOCs recovery rate; and the white smoke elimination and reheating section perfectly solves the "white smoke" problem caused by deep condensation. The three sections each perform their respective functions while working together, resulting in a better overall treatment effect. Attached Figure Description
[0012] Figure 1 This is a three-dimensional structural diagram of a combined heat exchanger for condensing and eliminating whitening of organic waste gas proposed in this utility model. Figure 2 This is a front view of the connection between the precooling mechanism and the deep condensation mechanism in a combined heat exchanger for condensing and eliminating whitening of organic waste gas proposed in this utility model. Figure 3 This is a side view of the connection between the precooling mechanism and the reheating and whitening mechanism in a combined heat exchanger for condensing and whitening organic waste gas, as proposed in this utility model. Figure 4 This is a cross-sectional view of the shell structure in a combined heat exchanger for condensing and eliminating whitening of organic waste gas proposed in this utility model.
[0013] In the diagram: 1. Precooling mechanism; 2. Deep condensation mechanism; 3. Reheating and whitening removal mechanism; 4. Shell; 5. Inlet pipe; 6. Exhaust pipe; 7. Drain pipe; 8. Refrigerant inlet pipe; 9. Refrigerant outlet pipe; 10. Serpentine heat exchanger tube; 11. First air guide pipe; 12. Second air guide pipe; 13. Flow guide pipe; 14. Baffle plate. Detailed Implementation
[0014] 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.
[0015] Please see Figure 1-4 This utility model provides a technical solution: a combined heat exchanger for condensing and eliminating whitening of organic waste gas, comprising: The precooling mechanism 1, the deep condensation mechanism 2, and the reheating and whitening mechanism 3 each include a housing 4. An air inlet pipe 5 is fixedly installed on one side wall of the housing 4, an exhaust pipe 6 is fixedly installed on the top of the housing 4, a drain pipe 7 is fixedly installed on the bottom of the housing 4, a refrigerant inlet pipe 8 is fixedly installed on the housing 4, a refrigerant outlet pipe 9 is fixedly installed on the housing 4, and a serpentine heat exchange tube 10 is arranged in the inner cavity of the housing 4. The two ends of the serpentine heat exchange tube 10 are connected to the refrigerant inlet pipe 8 and the refrigerant outlet pipe 9, respectively.
[0016] A first air guide pipe 11 is fixedly installed on the exhaust pipe 6 of the precooling mechanism 1. The end of the first air guide pipe 11 away from the precooling mechanism 1 is fixedly installed on the air inlet pipe 5 of the deep condensation mechanism 2, so that the exhaust gas can be introduced into the deep condensation mechanism 2 through the first air guide pipe 11 after being treated by the precooling mechanism 1.
[0017] A second air guide pipe 12 is fixedly installed on the exhaust pipe 6 of the deep condensation mechanism 2. The end of the second air guide pipe 12 away from the deep condensation mechanism 2 is fixedly installed on the air inlet pipe 5 of the reheating and whitening mechanism 3, so that the exhaust gas can be introduced into the reheating and whitening mechanism 3 through the second air guide pipe 12 after being treated by the deep condensation mechanism 2.
[0018] A guide pipe 13 is fixedly installed on the refrigerant pipe 9 of the precooling mechanism 1. The end of the guide pipe 13 away from the precooling mechanism 1 is fixedly installed on the refrigerant inlet pipe 8 of the reheating and whitening mechanism 3. The refrigerant in the precooling mechanism 1 can be introduced into the reheating and whitening mechanism 3 for use through the guide pipe 13.
[0019] Multiple staggered baffles 14 are fixedly welded into the inner cavity of the housing 4. The baffles 14 can extend the path of gas through the inner cavity of the housing 4, thereby improving the treatment effect.
[0020] Working principle: In use, the exhaust gas enters the housing 4 of the precooling mechanism 1 through the inlet pipe 5 of the precooling mechanism 1 via a conduit, and then exits through the exhaust pipe 6 of the precooling mechanism 1. During the process of the exhaust gas passing through the housing 4 of the precooling mechanism 1, ambient temperature cooling water flows through the refrigerant inlet pipe 8 of the precooling mechanism 1 and through the serpentine heat exchange tube 10 of the precooling mechanism 1 to precool the exhaust gas. Some water vapor and high-boiling-point organic matter condense. Afterwards, the exhaust gas is introduced into the deep condensation mechanism through the first gas guide pipe 11. In the shell 4 of the 2, during this process, the serpentine heat exchange tube 10 of the deep condensation mechanism 2 introduces low-temperature refrigerant to perform deep condensation on the exhaust gas, and most of the VOCs and water vapor are condensed. Afterwards, the exhaust gas is introduced into the shell 4 of the reheating and whitening mechanism 3 through the second gas guide tube 12. During the process of the exhaust gas passing through the shell 4 of the reheating and whitening mechanism 3, the ambient temperature cooling water in the precooling mechanism 1 is heated and introduced into the serpentine heat exchange tube 10 of the reheating and whitening mechanism 3 through the guide tube 13 to reheat the exhaust gas and achieve whitening.
[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[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 combined heat exchanger for condensing and eliminating whitening of organic waste gas, characterized in that, include: The precooling mechanism (1), the deep condensation mechanism (2) and the reheating and whitening mechanism (3) each include a shell (4). An air inlet pipe (5) is fixedly installed on one side wall of the shell (4). An exhaust pipe (6) is fixedly installed at the top of the shell (4). A drain pipe (7) is fixedly installed at the bottom of the shell (4). A refrigerant inlet pipe (8) is fixedly installed on the shell (4). A refrigerant outlet pipe (9) is fixedly installed on the shell (4). A serpentine heat exchange tube (10) is provided in the inner cavity of the shell (4). The two ends of the serpentine heat exchange tube (10) are connected to the refrigerant inlet pipe (8) and the refrigerant outlet pipe (9) respectively.
2. The combined heat exchanger for condensing and eliminating whitening of organic waste gas according to claim 1, characterized in that: The first air guide pipe (11) is fixedly installed on the exhaust pipe (6) of the precooling mechanism (1), and the end of the first air guide pipe (11) away from the precooling mechanism (1) is fixedly installed on the air inlet pipe (5) of the deep condensation mechanism (2).
3. A combined heat exchanger for condensing and eliminating whitening of organic waste gas according to claim 1, characterized in that: A second air guide pipe (12) is fixedly installed on the exhaust pipe (6) of the deep condensation mechanism (2), and the end of the second air guide pipe (12) away from the deep condensation mechanism (2) is fixedly installed on the air inlet pipe (5) of the reheating and whitening mechanism (3).
4. A combined heat exchanger for condensing and eliminating whitening of organic waste gas according to claim 1, characterized in that: A guide pipe (13) is fixedly installed on the refrigerant pipe (9) of the precooling mechanism (1), and the end of the guide pipe (13) away from the precooling mechanism (1) is fixedly installed on the refrigerant inlet pipe (8) of the reheating and whitening mechanism (3).
5. A combined heat exchanger for condensing and eliminating whitening of organic waste gas according to claim 1, characterized in that: Multiple staggered baffles (14) are fixedly welded into the inner cavity of the shell (4).