Waste gas purifying and cooling device with waste heat recovery function
By combining multi-stage purification with heat recovery, the problem of easy deactivation of activated carbon and high energy consumption in high-temperature waste gas treatment is solved. This achieves efficient waste gas cooling and purification, meets emission standards, reduces energy consumption, and has a self-ignition protection function.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU LEXUAN INTELLIGENT EQUIPMENT CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-05-08
AI Technical Summary
Existing waste gas treatment technologies suffer from the following problems: activated carbon pore structure is prone to deactivation at high temperatures, resulting in low adsorption efficiency and the risk of secondary pollution. Furthermore, they are energy-intensive, difficult to meet stringent emission standards, and pose a risk of spontaneous combustion.
The system employs a composite process that combines multi-stage purification with heat recovery. It utilizes a serpentine metal pipe finned radiator for gradient cooling, combined with primary large-pore honeycomb carbon body and nano-modified carbon material for stepwise adsorption. The system uses a variable frequency fan to control the air pressure and flow rate, thereby achieving dynamic temperature regulation and efficient purification of the exhaust gas. Furthermore, the system protects the equipment's safety through a closed-loop heat recovery design.
It achieves efficient cooling and purification of exhaust gas, reduces pollutant concentration, meets emission standards, reduces energy consumption and eliminates the risk of spontaneous combustion, and has a simple structure that is easy to maintain.
Smart Images
Figure CN224215896U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cooling equipment technology, specifically to a waste gas purification and cooling device with waste heat recovery function. Background Technology
[0002] With the rapid development of industrial production, waste gas emissions have become a major challenge in the field of environmental protection. Organic waste gases, volatile organic compounds (VOCs), and odorous pollutants generated during industrial production, if directly emitted without effective treatment, will not only disrupt the ecological balance but also cause irreversible damage to the human respiratory and nervous systems, and even pose a risk of cancer. While activated carbon adsorption technology, widely used in the industry, can remove some pollutants, it still has significant shortcomings in practical applications.
[0003] Traditional waste gas treatment processes often employ single cooling or direct adsorption modes, which have limitations in three main aspects: First, when the initial temperature of the waste gas is too high (common in high-temperature processes such as chemical and coating industries), direct entry into the adsorption device can lead to pyrolysis and deactivation of the activated carbon's pore structure, reducing adsorption efficiency and creating a risk of secondary pollution. Second, conventional single-stage activated carbon boxes suffer from rapid adsorption saturation rates and high pollutant penetration probabilities, making it difficult to meet increasingly stringent emission standards (such as GB 16297-1996 Integrated Emission Standard for Air Pollutants). Third, existing equipment often employs complex heat exchange systems or spray cooling devices, increasing energy costs by 30%-50% and requiring shutdown for disassembly during maintenance, severely impacting continuous production. Furthermore, insufficiently cooled waste gas can easily trigger an exothermic oxidation reaction on the activated carbon surface, posing a safety hazard of spontaneous combustion of the adsorption material. Therefore, we propose a waste gas purification and cooling device with waste heat recovery capabilities. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] In view of the shortcomings of the prior art, this utility model provides a waste gas purification and cooling device with waste heat recovery function, which overcomes the shortcomings of the prior art, has a reasonable design and compact structure, and solves the problems mentioned in the background art.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A waste gas purification and cooling device with waste heat recovery function, characterized in that it includes:
[0009] The heat dissipation box contains a tubular radiator, which is a serpentine metal pipe with finned structures on the pipe wall for gradient cooling of exhaust gas.
[0010] The primary activated carbon box is connected to the outlet of the heat dissipation box and contains large-pore honeycomb carbon particles for coarse adsorption of pollutants.
[0011] The secondary activated carbon box is connected in series with the primary activated carbon box and contains nano-modified carbon material for deep adsorption by molecular sieves.
[0012] The first fan is located on the exhaust side of the secondary activated carbon box and is used to drive the purified gas to be discharged.
[0013] The return pipe connects the first fan and the radiator, forming a closed loop for heat recovery, allowing the residual heat of the purified gas to exchange heat with the initial exhaust gas in a reverse manner.
[0014] Preferably, a second fan is also included, which is installed on the pipeline between the heat dissipation box and the primary activated carbon box, and is used to draw the exhaust gas into the activated carbon box.
[0015] Preferably, the air inlet of the heat dissipation box is equipped with a turbulent mixing chamber, which introduces clean air from the outside through a second fan to form a dynamic air supply mechanism and achieve secondary temperature control of the exhaust gas.
[0016] Preferably, the carbon bodies in the primary and secondary activated carbon boxes are modularly designed and can be disassembled and replaced independently.
[0017] Preferably, the first and second fans are variable frequency fans, which regulate the system air pressure and flow rate through linkage control to maintain stable operating parameters of the radiator, primary activated carbon box and secondary activated carbon box.
[0018] Preferably, the bottom of the heat dissipation box is equipped with an emergency discharge valve, which automatically opens when the internal temperature of the system exceeds the threshold to prevent the activated carbon from spontaneously combusting.
[0019] (III) Beneficial Effects
[0020] This utility model provides a waste gas purification and cooling device with waste heat recovery function. It has the following beneficial effects:
[0021] Cooling protection: The gas enters the radiator first, which can effectively protect the emission device; reduce the activity of the exhaust gas and reduce secondary pollution.
[0022] Highly efficient purification: Activated carbon adsorbs various components of waste gas, and the two-stage filtration significantly reduces the concentration of pollutants in the exhaust gas, meeting emission standards; it improves air quality, which is of great significance for protecting ecological balance and human health, and eliminates odors in waste gas.
[0023] Simple structure: Replacement is simple and easy to operate. You only need to properly handle the replaced activated carbon, which will not delay production. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structure of this utility model.
[0025] In the diagram: 1. Heat sink; 11. Exhaust port; 12. Air inlet; 13. Radiator; 2. Primary activated carbon box; 3. Secondary activated carbon box; 4. First fan; 41. Return pipe; 5. Second fan. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0027] See attached document Figure 1 The cooling device adopts a composite process combining multi-stage purification and heat recovery. The overall device consists of a heat dissipation box 1, a primary activated carbon box 2, a secondary activated carbon box 3, a first fan 4, a second fan 5, and supporting pipelines, forming a three-dimensional circulation system. The first fan 4 and the second fan 5 are variable frequency fans, which regulate the system air pressure and flow rate through linkage control to maintain stable operating parameters of the radiator 13, the primary activated carbon box 2, and the secondary activated carbon box 3. The exhaust gas treatment path begins with the solidified exhaust gas entering the heat dissipation box 1 through the air inlet 12, where it undergoes initial heat exchange with the built-in tubular radiator 13. The radiator 13 is a serpentine metal pipe with finned structures on its pipe walls. The temperature gradient of the exhaust gas is achieved through the metal heat-conducting fins. An emergency discharge valve is provided at the bottom of the heat dissipation box 1, which automatically opens when the internal temperature of the system exceeds the threshold to prevent spontaneous combustion of the activated carbon.
[0028] The pre-cooled exhaust gas enters the air volume regulation section under the negative pressure traction of the second fan 5. This section introduces clean air from the outside to form a dynamic air supply mechanism, and completes secondary temperature regulation in the turbulent mixing chamber. That is, the exhaust gas first enters the radiator 13 for the first cooling, and then the second fan 5 performs a second cooling after passing through the radiator 13. The airflow that has completed temperature control then enters the primary activated carbon box 2 and the secondary activated carbon box 3 in sequence. The primary activated carbon box 2 is equipped with large-pore honeycomb carbon body to achieve coarse interception, and the secondary activated carbon box 3 uses nano-modified carbon material for molecular sieve adsorption, forming a progressively deepening pollutant capture network. That is, the airflow that has completed temperature control enters the primary activated carbon box 2 and the secondary activated carbon box 3 for filtration, and the filtered gas re-enters the hot box 1 and is discharged.
[0029] The purified gas, after being pressurized by the main fan 4, is transported to the heat recovery stage through the return pipe 41 and reintroduced into the high-efficiency heat transfer channel of the radiator 13. This closed-loop design allows the waste heat carried by the treated exhaust gas to form a reverse heat exchange with the initial exhaust gas, and finally, it is discharged in compliance with standards through the exhaust port 11 at the bottom of the radiator box 1, forming a complete "cooling-purification-heat recovery" dynamic balance system. The system ensures that the radiator 13, the primary activated carbon box 2, the secondary activated carbon box 3, and the airflow channel are always within the optimal operating parameter range through the two-stage linkage control of the first fan 4 and the second fan 5.
[0030] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0031] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A waste gas purification and cooling device with waste heat recovery function, characterized in that: include: The heat dissipation box (1) is equipped with a tubular radiator (13) inside. The radiator (13) is a serpentine metal pipe with a finned structure on the pipe wall for gradient cooling of exhaust gas. The primary activated carbon box (2) is connected to the outlet of the heat dissipation box (1) and has a built-in large-pore honeycomb carbon body for coarse adsorption of pollutants; The secondary activated carbon box (3) is connected in series with the primary activated carbon box (2) and contains nano-sized modified carbon material for deep adsorption by molecular sieves. The first fan (4) is located on the exhaust side of the secondary activated carbon box (3) and is used to drive the purified gas to be discharged. The return pipe (41) connects the first fan (4) and the radiator (13) to form a closed loop of heat recovery, so that the residual heat of the purified gas can be exchanged with the initial exhaust gas in reverse.
2. The waste gas purification and cooling device with waste heat recovery function as described in claim 1, characterized in that: It also includes a second fan (5), which is installed on the pipeline between the heat dissipation box (1) and the primary activated carbon box (2) to draw the exhaust gas into the activated carbon box.
3. The waste gas purification and cooling device with waste heat recovery function as described in claim 2, characterized in that: The heat dissipation box (1) has a turbulent mixing chamber at the air inlet (12), which introduces clean air from the outside through the second fan (5) to form a dynamic air supply mechanism and realize secondary temperature control of the exhaust gas.
4. The waste gas purification and cooling device with waste heat recovery function as described in claim 1, characterized in that: The carbon bodies of the primary activated carbon box (2) and the secondary activated carbon box (3) are modularly designed and can be disassembled and replaced independently.
5. The waste gas purification and cooling device with waste heat recovery function as described in claim 1, characterized in that: The first fan (4) and the second fan (5) are variable frequency fans. The system air pressure and flow rate are adjusted through linkage control to maintain the stable operating parameters of the radiator (13), the primary activated carbon box (2) and the secondary activated carbon box (3).
6. The waste gas purification and cooling device with waste heat recovery function as described in claim 1, characterized in that: The bottom of the heat dissipation box (1) is equipped with an emergency discharge valve, which automatically opens when the internal temperature of the system exceeds the threshold to prevent the activated carbon from spontaneously combusting.