Tail gas recycling device of drying machine
By designing ventilation components and heaters in the dryer exhaust circulation system, the heat loss problem caused by excessive paths and complex structures is solved, efficient exhaust dehumidification and filtration are achieved, and the use stability and energy recovery rate are improved.
Patent Information
- Application Number
- CN202420964736.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The path of the existing dryer exhaust gas circulation system is too long, resulting in heat loss and complex structure, which affects energy recovery and use stability.
A dryer exhaust gas recovery and circulation device is designed, including ventilation components and heaters. Through the filter housing, filter element, air pump and connection pipe, the high-temperature waste steam is dehumidified and filtration, reducing resource waste, and filtration in the filtering. A heater is added in the cavity to prevent temperature loss.
It effectively reduces resource waste, reduces production costs, improves usage stability and efficiency, and ensures efficient recovery of heat energy.
Smart Images
Figure CN222298443U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dryers, in particular to a dryer tail gas recovery and circulation device. Background Art
[0002] The dryer tail gas recovery and circulation device is a device for recovering and recycling the tail gas of the dryer. The dryer usually emits heat and moisture, and these tail gases can be recovered through the circulation device, thereby reducing energy consumption and environmental emissions. Specifically, the dryer tail gas recovery and circulation device usually includes the following parts: a heat exchanger, a moisture collection system, a purification system and a circulation system. By using the dryer tail gas recovery and circulation device, not only can energy conservation and environmental protection be achieved, but also the working efficiency and production capacity of the dryer can be improved. In the prior art, the dryer will generate a large amount of high-temperature and high-humidity tail gas when working. In addition to the dehumidified moisture and waste gas, the tail gas also contains a large amount of dust and heat energy. At present, the tail gas discharged by the dryer is only subjected to a simple dust removal treatment and is directly discharged to the outside world, which will not only pollute the environment, but also cause waste of heat energy in the tail gas.
[0003] To solve the above technical problems, Chinese patent CN212339900U discloses a dryer exhaust gas circulation system, including: a dust removal system, the inlet of the dust removal system is connected to the outlet of the dryer, and is used to remove dust in the exhaust gas; a heat circulation system, including a cooling heat exchanger and a heating heat exchanger connected thereto, which can transfer heat to the heating heat exchanger; the cooling heat exchanger is connected to the outlet of the dust removal system, and is used to cool the exhaust gas; the heating heat exchanger is connected to the inlet of the dryer, and is used to heat the exhaust gas entering the dryer; a heat energy recovery system, including a heat recovery heat exchanger, the heat recovery heat exchanger is connected between the cooling heat exchanger and the heating heat exchanger, and the heat recovery heat exchanger is used to recover heat energy in the exhaust gas; an impurity recovery system, the impurity recovery system is connected to the cooling heat exchanger and the heat recovery heat exchanger, and is used to collect condensed water therein. The above-mentioned dryer exhaust gas circulation system can not only avoid the emission of dust, but also recover water, heat energy and raw materials in the exhaust gas. However, the recovery system path is too long, which easily leads to heat loss. At the same time, the complex structure will also affect the energy recovery rate, ultimately resulting in the recovered heat energy not meeting the standard, affecting the stability of the dryer.
[0004] Therefore, it is necessary for technical personnel in this field to provide a dryer exhaust gas recovery and circulation device to reduce the recovery path and the complex structure of the recovery device, ensure the heat energy recovery efficiency, and improve the stability of the dryer. Utility Model Content
[0005] The utility model aims to provide a dryer exhaust gas recovery and circulation device to solve the technical problem that the exhaust gas discharged by the dryer in the prior art is only subjected to simple dust removal treatment and then directly discharged to the outside, which not only pollutes the environment but also causes waste of heat energy in the exhaust gas.
[0006] The utility model solves the technical problem by adopting the following technical scheme: a dryer tail gas recovery and circulation device, which is used to be installed on the dryer, the dryer comprises a drying furnace body, the drying furnace body is in a square shell-shaped structure with a hollow interior, a drying cavity is formed in the drying furnace body, a main shaft is rotatably provided in the drying furnace body, a spiral blade is provided on the main shaft, a ventilation component is provided on the drying furnace body, and the ventilation component comprises a filter housing, a filter element, an air pump and a connecting pipe; the filter housing is arranged on the top of the drying furnace body, the filter housing is in a square shell-shaped structure with a hollow interior, a filter cavity is formed inside the filter housing; a ventilation pipe opening is arranged on the surface of the filter housing facing the drying furnace body, the filter element is installed in the filter cavity, a filter plate is arranged on the filter element in the filter cavity, and the filter plate faces the ventilation pipe opening; a first ash baffle and a second ash baffle are also arranged in the filter cavity, the first ash baffle is provided with two and symmetrically arranged on both sides of the ventilation pipe opening, and the second ash baffle is provided with one and directly facing the ventilation pipe opening.
[0007] Furthermore, the second ash baffle plate is located between the two first ash baffle plates, the second ash baffle plate is arc-shaped, and the concave surface of the second ash baffle plate faces the ventilation pipe opening.
[0008] Furthermore, the two first ash baffles are arc-shaped, the arc surface of the first ash baffle faces the second ash baffle, and an ash accumulation cavity is formed between the concave surface of the first ash baffle and the inner wall of the filter shell, and the ash accumulation cavity is connected to the filter cavity.
[0009] Furthermore, a check valve is provided on the first dust baffle plate, and the check valve is a rubber flap one-way check valve.
[0010] Furthermore, the drying furnace body is provided with a feed port and a discharge port, the filter housing is located on the drying furnace body close to the discharge port, and one end of the connecting pipe penetrating the drying furnace body is located at the feed port.
[0011] Furthermore, the ventilation pipe opening penetrates the wall of the filter housing and communicates with the drying cavity and the filter cavity.
[0012] Furthermore, the vacuum pump is arranged outside the filter housing and is installed on a connecting pipe; one end of the connecting pipe passes through the wall of the drying furnace body and is connected to the drying cavity, and the other end of the connecting pipe passes through the wall of the filter housing and is connected to the filter cavity.
[0013] Furthermore, the end of the connecting pipe in the filter housing is above the filter element.
[0014] Furthermore, a heater is provided in the filter cavity, and the heater is located above the filter core and close to the connecting pipe.
[0015] The beneficial effects of the utility model are as follows: the utility model realizes dehumidification and filtration of the high-temperature waste steam in the dryer by adding a ventilation component, thereby ensuring the repeated utilization of repeated high-temperature gas, reducing the waste of resources, and reducing production costs; at the same time, a heater is added in the filtering cavity, and the temperature of the filtered gas is heated by the heater to prevent excessive temperature loss during the filtering process, thereby improving the use stability and use effect of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a stereoscopic diagram of the dryer tail gas recovery and circulation device of the utility model.
[0017] Figure 2 It is a top view of the dryer tail gas recovery and circulation device of the utility model.
[0018] Figure 3 yes Figure 2 Sectional view along AA.
[0019] Figure 4 yes Figure 2 Cross-sectional view along BB.
[0020] Figure 5 It is a main cross-sectional view of a ventilation component in a dryer tail gas recovery and circulation device of the utility model.
[0021] The components in the accompanying drawings are marked as follows: 10, drying furnace body; 101, drying cavity; 11, main shaft; 12, spiral blade; 18, loading port; 19, discharging port; 30, ventilation component; 31, filter housing; 311, heater; 312, dust accumulation cavity; 32, filter element; 33, vacuum pump; 34, connecting pipe; 35, ventilation pipe port; 36, filter cavity; 37, filter plate; 38, first dust baffle plate; 39, second dust baffle plate. DETAILED DESCRIPTION
[0022] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.
[0023] See also Figure 1 , Figure 2The utility model provides a dryer exhaust gas recovery and circulation device, which is used to be installed on the dryer, including a drying furnace body 10, which is a square shell structure with a hollow interior. A drying cavity 101 is formed in the drying furnace body 10, and a main shaft 11 is rotatably provided in the drying furnace body 10, and a spiral blade 12 is provided on the main shaft 11.
[0024] When in use, the material is added into the drying cavity 101 of the drying furnace body 10, the spiral blade 12 is used to push the material to move, and high-temperature gas is passed into and inside the drying cavity 101 to dry the material. The high-temperature gas will generate high-temperature waste steam after contacting the material.
[0025] For further information, see Figure 3 , Figure 4 The drying furnace body 10 is provided with a ventilation component 30 , and the ventilation component 30 includes a filter housing 31 , a filter element 32 , an air pump 33 and a connecting pipe 34 .
[0026] Specifically, see Figure 5 The filter housing 31 is arranged on the top of the drying furnace body 10. The filter housing 31 is a square shell structure with a hollow interior. A filter cavity 36 is formed inside the filter housing 31. A ventilation pipe opening 35 is arranged on the surface of the filter housing 31 facing the drying furnace body 10. The ventilation pipe opening 35 penetrates the wall of the filter housing 31 and connects the drying cavity 101 and the filter cavity 36. When in use, the high-temperature waste steam in the drying cavity 101 is sucked into the filter cavity 36 by the vacuum pump 33 to complete the suction, but at the same time, the dust in the drying cavity 101 will be sucked in.
[0027] Furthermore, the filter element 32 is installed in the filter cavity 36. Preferably, the filter element 32 includes but is not limited to diatomaceous earth. It is used to ensure air permeability while absorbing moisture in the air. A filter plate 37 is provided on the filter element 32 in the filter cavity 36, and the filter plate 37 faces the ventilation pipe port 35; the filter plate 37 is made of glass fiber to filter dust and ensure the stability of the filtration of the filter element 32. Preferably, the filter pore size of the filter plate 37 is 10 to 100 μm.
[0028] In another embodiment, the filter cavity 36 is connected to a dehumidifier, and the dehumidifier is a common industrial dehumidifier on the market, which is used to remove moisture in the filter cavity 36 to ensure a drying effect.
[0029] Furthermore, a first ash baffle 38 and a second ash baffle 39 are also provided in the filter cavity 36. Two first ash baffles 38 are provided and are symmetrically arranged on both sides of the ventilation pipe port 35. One second ash baffle 39 is provided and is opposite to the ventilation pipe port 35. The second ash baffle 39 is also located between the two first ash baffles 38. The second ash baffle 39 is arc-shaped, and the concave surface of the second ash baffle 39 is opposite to the ventilation pipe port 35, so as to ensure that most of the dust entering the filter cavity 36 can be blocked by the second ash baffle 39, thereby reducing dust clogging.
[0030] The two first ash baffles 38 are arc-shaped, with the arc surface of the first ash baffle 38 facing the second ash baffle 39 . A ash accumulation cavity 312 is formed between the concave surface of the first ash baffle 38 and the inner wall of the filter housing 31 , and the ash accumulation cavity 312 is connected to the filter cavity 36 .
[0031] In this embodiment, a check valve (not shown) is disposed on the first dust baffle plate 38 . Preferably, the check valve is a rubber flap one-way check valve.
[0032] In another embodiment, a hole (not shown) is opened on the first dust baffle plate 38 , and the dust accumulation cavity 312 is connected to the filter cavity 36 through the hole.
[0033] When in use, when the dust is blocked by the second ash baffle plate 39, it will fall onto the first ash baffle plate 38. The curved surface of the first ash baffle plate 38 is used to ensure the stability of the dust falling and prevent accumulation. At the same time, during the flow of dust, the check valve on the first ash baffle plate 38 is opened, and the dust is blown into the dust accumulation cavity 312, so as to prevent the dust from flowing back from the ventilation pipe port 35, further ensuring the filtering stability.
[0034] It can be understood that the dust accumulation cavity 312 is connected to a valve (not shown) to filter the outside of the housing 31. When the dust accumulation cavity 312 is full of dust, the dust can be discharged from the valve to ensure the stability of the use of the utility model.
[0035] Furthermore, the vacuum pump 33 is arranged outside the filter housing 31, and the vacuum pump 33 is installed on the connecting pipe 34; one end of the connecting pipe 34 passes through the wall of the drying furnace body 10 and is connected to the drying cavity 101, and the other end of the connecting pipe 34 passes through the wall of the filter housing 31 and is connected to the filter cavity 36. The end of the connecting pipe 34 located in the filter housing 31 is above the filter core 32.
[0036] Preferably, a one-way valve (not shown) is provided on one end of the connecting pipe 34 close to the drying furnace body 10 to ensure that the gas can stably flow from the filtering cavity 36 into the drying cavity 101 to prevent backflow, thereby ensuring the stability of the utility model.
[0037] When in use, a large amount of high-temperature waste steam will be generated in the drying cavity 101. The vacuum pump 33 is used to suck the air in the filter cavity 36 and the drying cavity 101, and then the high-temperature waste steam is sucked into the filter cavity 36. The filter plate 37, the first ash baffle plate 38 and the second ash baffle plate 39 and other components are used to remove dust in the high-temperature waste steam. The filter element 32 is then used to remove moisture in the high-temperature waste steam, reduce moisture to obtain high-temperature gas, and then continue to use the vacuum pump 33 to pump the high-temperature gas into the drying cavity 101 to achieve reuse, effectively save resources, and reduce energy consumption. At the same time, the self-circulation of hot air can indirectly improve the sealing performance of the utility model.
[0038] Furthermore, the drying furnace body 10 is provided with a loading port 18 and a discharging port 19. When the loading port 18 is located at both ends of the drying furnace body 10, the discharging port 19 is located in the middle of the drying furnace body 10; when the loading port 18 is located in the middle of the drying furnace body 10, the discharging port 19 is located at both ends of the drying furnace body 10.
[0039] In this embodiment, two loading ports 18 are provided on the top surface of the drying furnace body 10, and a discharge port 19 is provided at the lower end of the side of the drying furnace body 10; at the same time, the loading port 18 is located at both ends of the drying furnace body 10, and the discharge port 19 is located in the middle of the drying furnace body 10.
[0040] In another embodiment, a loading port 18 is provided on the top surface of the drying furnace body 10, and two discharging ports 19 are provided at the lower end of the side of the drying furnace body 10; at the same time, the loading port 18 is located in the middle of the drying furnace body 10; and the discharging ports 19 are located at both ends of the drying furnace body 10. In this way, the utility model can load materials from both ends of the drying furnace body 10 and take materials from the middle, or load materials from the middle of the drying furnace body 10 and take materials from both ends. In this way, the convenience and versatility of the use of the utility model are improved, and the convenience of loading and unloading materials is ensured.
[0041] Furthermore, the filter housing 31 is located on the drying furnace body 10 near the discharge port 19 , and one end of the connecting pipe 34 that passes through the drying furnace body 10 is located at the loading port 18 .
[0042] In this way, the utility model realizes the recycling and reuse of the waste gas in the tail gas part of the drying furnace body 10, reduces the waste gas escaping from the discharge port 19, and discharges the treated waste gas from the feed port 18 at the same time, realizes recycling and reuse, ensures the accuracy of recycling, and reduces processing costs.
[0043] Furthermore, a heater 311 is provided in the filter cavity 36, and the heater 311 is located above the filter element 32 and close to the connecting pipe 34; preferably, the heater 311 includes but is not limited to resistance wire heating; when in use, the heater 311 is used to heat the temperature of the filtered gas to prevent excessive temperature loss during the filtration process, thereby improving the stability and effect of the utility model.
[0044] The specific operation method of the present invention is as follows: step 1: adding materials into the drying furnace body 10, and then introducing high-temperature gas into the drying furnace body 10 to dry the materials.
[0045] Step 2: Start the vacuum pump 33, the high-temperature waste steam enters the filter cavity 36 from the ventilation pipe port 35, and uses the filter plate 37, the first ash baffle 38, the second ash baffle 39 and other components to remove dust in the high-temperature waste steam, and then uses the filter element 32 to remove moisture in the high-temperature waste steam, reducing moisture to obtain high-temperature gas, and then continues to use the vacuum pump 33 to pump the high-temperature gas into the drying cavity 101 for repeated use.
[0046] The utility model realizes dehumidification and filtration of the high-temperature waste steam in the dryer by adding a ventilation component 30, thereby ensuring the repeated utilization of repeated high-temperature gas, reducing resource waste and lowering production costs; at the same time, a heater 311 is added in the filter cavity 36, and the heater 311 is used to heat the temperature of the filtered gas to prevent excessive temperature loss during the filtration process, thereby improving the stability and use effect of the utility model.
[0047] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.
Claims
1. A dryer tail gas recovery and circulation device, used for installation on a dryer, the dryer comprising a drying furnace body (10), the drying furnace body (10) being a square shell structure with a hollow interior, a drying cavity (101) being formed in the drying furnace body (10), a main shaft (11) being rotatably provided in the drying furnace body (10), and a spiral blade (12) being provided on the main shaft (11), characterized in that: The drying furnace body (10) is provided with a ventilation assembly (30), the ventilation assembly (30) comprising a filter housing (31), a filter core (32), an air pump (33) and a connecting pipe (34); The filter housing (31) is arranged on the top of the drying furnace body (10), the filter housing (31) is in the form of a square shell structure with a hollow interior, and a filter cavity (36) is formed inside the filter housing (31); a ventilation pipe opening (35) is provided on the surface of the filter housing (31) facing the drying furnace body (10), the filter element (32) is installed in the filter cavity (36), a filter plate (37) is provided on the filter element (32) in the filter cavity (36), and the filter plate (37) faces the ventilation pipe opening (35); a first ash baffle (38) and a second ash baffle (39) are also provided in the filter cavity (36), two first ash baffles (38) are provided and are symmetrically arranged on both sides of the ventilation pipe opening (35), and one second ash baffle (39) is provided and faces the ventilation pipe opening (35).
2. The dryer tail gas recovery and circulation device according to claim 1, characterized in that: The second ash baffle plate (39) is located between the two first ash baffle plates (38), the second ash baffle plate (39) is arc-shaped, and the concave surface of the second ash baffle plate (39) faces the ventilation pipe opening (35).
3. The dryer tail gas recovery and circulation device according to claim 2, characterized in that: The two first ash baffles (38) are arc-shaped, the arc surface of the first ash baffle (38) faces the second ash baffle (39), a ash accumulation cavity (312) is formed between the concave surface of the first ash baffle (38) and the inner wall of the filter housing (31), and the ash accumulation cavity (312) is connected to the filter cavity (36).
4. The dryer tail gas recovery and circulation device according to claim 3, characterized in that: The first dust baffle plate (38) is provided with a check valve, and the check valve is a rubber flap one-way check valve.
5. The dryer tail gas recovery and circulation device according to claim 1, characterized in that: The drying furnace body (10) is provided with a loading port (18) and a discharging port (19), the filter housing (31) is located on the drying furnace body (10) near the discharging port, and one end of the connecting pipe (34) passing through the drying furnace body (10) is located at the loading port (18).
6. The dryer tail gas recovery and circulation device according to claim 1, characterized in that: The ventilation pipe opening (35) penetrates the wall of the filter housing (31) and communicates with the drying cavity (101) and the filter cavity (36).
7. The dryer tail gas recovery and circulation device according to claim 1, characterized in that: The vacuum pump (33) is arranged outside the filter housing (31), and the vacuum pump (33) is mounted on a connecting pipe (34); one end of the connecting pipe (34) passes through the wall of the drying furnace body (10) and is connected to the drying cavity (101), and the other end of the connecting pipe (34) passes through the wall of the filter housing (31) and is connected to the filter cavity (36).
8. The dryer tail gas recovery and circulation device according to claim 7, characterized in that: The end of the connecting pipe (34) located in the filter housing (31) is above the filter core (32).
9. The dryer tail gas recovery and circulation device according to claim 8, characterized in that: A heater (311) is also provided in the filter cavity (36), and the heater (311) is located above the filter core (32) and close to the connecting pipe (34).