Closed feed heat exchanger

Abstract

The application discloses a closed feed heat exchanger, which comprises a support frame, a heat exchange module arranged above the support frame, a heat exchange module shell, a heat exchange module shell upper opening and a heat exchange module shell lower opening, a heat exchange plate group arranged in the heat exchange module shell, a hopper module, a hopper module shell, a hopper upper opening and a hopper lower opening, an air inlet arranged on the hopper module shell and used for connecting an air flow module to introduce an isolation medium into the hopper module shell. The application has the beneficial effect that the heat exchange module is connected above the support frame, the hopper module is connected at the top of the heat exchange module, a switch module is arranged at the hopper upper opening to control the opening or closing of the hopper upper opening, the air inlet is arranged to introduce the isolation medium into the hopper module shell, and an air curtain is formed below the hopper upper opening to avoid the contact of the material with the external air and improve the air tightness of the feeding process.

Description

Technical Field

[0001] This invention belongs to the field of powdered material production technology, and particularly relates to a closed-loop feed heat exchanger. Background Technology

[0002] Powder heat exchangers are widely used in the chemical and energy industries. Based on their feeding method, they are classified into conventional feed type and airtight feed type. Conventional feed heat exchangers are effective for cooling materials with high fluidity. They utilize a series of vertically placed, annularly arranged pillow-shaped heat exchange plates within the heat exchanger module. The powder passes through the external gaps of the heat exchange plates, while low-temperature cooling water flows through the internal channels, resulting in counter-current heat exchange between the two through the plate walls. Airtight feed heat exchangers are primarily used in the chemical, pharmaceutical, pesticide, fine chemical, and high-end electronic chemical industries. These industries often involve processes involving large quantities of volatile organic compounds, highly toxic or hazardous media, or materials with extremely high unit prices, making them sensitive to air contact. Airtight feed is used to isolate the powder from air.

[0003] Conventional feeding typically involves a direct material transport method. Material enters the heat exchanger directly under its own weight and the pushing force generated by the conveying equipment (such as screw conveyors and belt conveyors), exchanging heat with the heat exchange medium inside. During feeding, the overall system sealing requirements are relatively less stringent; the focus is on ensuring a stable and continuous flow of material into the heat exchange area. Airtight feeding, on the other hand, emphasizes maintaining good airtightness throughout the feeding system. It is generally equipped with specialized sealing devices (such as rotary feed valves combined with sealing structures, and special airtight conveying pipelines) to prevent external air or other gases from entering the heat exchanger or to prevent gases and dust inside the heat exchanger from leaking into the external environment. The material is transported to the heat exchanger for heat exchange in a relatively sealed environment.

[0004] Conventional feeding and airtight feeding also have the following differences: 1. Impact on system sealing: Conventional feeding does not have particularly strict airtightness requirements, and there may be some gas exchange at the feed inlet and other parts. However, if the system in which the heat exchanger is located does not have high requirements for the ambient atmosphere, a small amount of gas exchange will not have a significant impact. For example, in some open powder heat exchange processes where the requirements for heat exchange efficiency and accuracy are not particularly high and the material is not afraid of a small amount of air mixing, conventional feeding can meet the basic requirements.

[0005] The core feature of airtight feed is ensuring a tight seal, minimizing gas exchange between the system and the external environment. It is commonly used in situations where material quality and reaction atmosphere requirements are stringent. For example, when handling flammable and explosive powder materials, airtight feed can prevent air from entering and causing hazards; or in high-precision chemical production, airtight feed can prevent external impurities from mixing in and affecting product quality and the stability of the entire reaction or heat exchange process.

[0006] 2. Applicable Material Characteristics: Conventional feeding is more suitable for powder materials that are relatively stable and not easily affected by small amounts of gas such as outside air. For example, some common powdered auxiliary materials used in the production of common building materials, such as ordinary calcium carbonate powder, can generally ensure the smooth operation of the production process when heating or cooling heat exchange, and will not cause obvious quality problems or process failures due to the mixing of small amounts of gas during the feeding process.

[0007] Airtight feeding is particularly suitable for powder materials that are easily oxidized, hygroscopic, flammable, explosive, or require extremely high purity. For example, in the pharmaceutical industry, when drying and heat-exchanging powders containing active pharmaceutical ingredients, airtight feeding is required to prevent the drug components from being oxidized or contaminated with impurities that could affect the efficacy. Similarly, many positive and negative electrode material powders used in lithium battery production require airtight feeding to ensure the performance and safety of the materials.

[0008] 3. Equipment complexity and cost: The feeding equipment involved in conventional feeding is relatively simple, often consisting of common conveying machinery with a simple feed port structure. The equipment purchase, installation and subsequent maintenance costs are relatively low, and the operation is relatively easy, without the need for complex sealing-related debugging and maintenance work.

[0009] Because airtight feeding requires specialized airtight valves, sealing pipes, and corresponding sealing detection and compensation devices to ensure good airtightness, the overall equipment structure is more complex, the initial equipment purchase cost is higher, and subsequent maintenance also requires professional technicians to regularly test and maintain the sealing performance, resulting in relatively high costs.

[0010] In summary, there is an urgent need for a heat exchange device that can be compatible with both open and airtight feeding, and can meet the material production needs of multiple fields. Summary of the Invention

[0011] The purpose of this invention is to overcome the shortcomings of the prior art and provide a closed-loop feed heat exchanger that is compatible with both open-loop and airtight feed, meeting the material production needs of multiple fields.

[0012] To achieve the above objectives, the present invention employs the following technical solution: a sealed feed heat exchanger, comprising: a support frame; a heat exchange module disposed above the support frame, the heat exchange module including a heat exchange module shell having an upper heat exchange opening and a lower heat exchange opening, and a heat exchange plate assembly disposed within the heat exchange module shell for heat exchange of materials; and a hopper module including a hopper module shell having an upper hopper opening and a lower hopper opening, the upper hopper opening for feeding materials, and the hopper module shell being provided with... An air inlet is connected to an airflow module to introduce an isolation medium into the hopper module housing. The lower opening of the hopper is connected to the upper opening of the heat exchanger. A switch module is located at the top of the upper opening of the hopper. The switch module has an open state and a closed state. In the open state, the upper opening of the hopper is open, and in the closed state, the upper opening of the hopper is closed. A discharge module includes a discharge module housing, which has an upper discharge opening and a lower discharge opening. The upper discharge opening is connected to the lower opening of the heat exchanger, and the lower discharge opening is used to discharge material.

[0013] Optionally, the hopper module housing includes a connected equal-width portion and a narrowed portion, the top of the equal-width portion is the upper opening of the hopper, the bottom of the narrowed portion is the lower opening of the hopper, and there is at least one air inlet, which is disposed on the side of the equal-width portion.

[0014] Optionally, the switch module includes a first movable member and a second movable member disposed opposite to each other. In the open state, the first movable member and the second movable member are disengaged to open the opening on the hopper. In the closed state, the first movable member and the second movable member are in contact to close the opening on the hopper.

[0015] Optionally, a first cylinder is connected to the side of the first movable member facing away from the second movable member, and a second cylinder is connected to the side of the second movable member facing away from the first movable member. In the open state, the output ends of the first and second cylinders retract inward, and in the closed state, the output ends of the first and second cylinders extend outward.

[0016] Optionally, both the first cylinder and the second cylinder are connected to a fixing plate, and the fixing plate is fixedly connected to the top of the hopper module housing.

[0017] Optionally, the first movable component includes a first base plate, a first inclined plate and a first side plate are fixedly connected to the top of the first base plate, the first inclined plate and the first side plate are arranged perpendicularly to each other, a first connecting rib is provided between the first base plate and the first inclined plate, and one side of the first connecting rib is fixedly connected to the output end of the first cylinder.

[0018] Optionally, the second movable component includes a second base plate, a second inclined plate and a second side plate are fixedly connected to the top of the second base plate, the second inclined plate and the second side plate are arranged perpendicularly to each other, a second connecting rib is provided between the second base plate and the second inclined plate, one side of the second connecting rib is fixedly connected to the output end of the second cylinder, and both the first base plate and the second base plate are provided with strip grooves, and locking components are provided at the strip grooves.

[0019] Optionally, at least two crossbeams are arranged parallel to each other at intervals on the top of the support frame, and the two crossbeams are fixedly connected to the two sides of the heat exchange module housing, respectively.

[0020] Optionally, a heat exchange medium inlet and a heat exchange medium outlet are connected to one side of the heat exchange module housing, with the heat exchange medium inlet located below the heat exchange medium outlet.

[0021] Optionally, the discharge module housing is connected to a pneumatic vibrator, and a slide valve is provided at the discharge lower opening.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. A heat exchange module is connected above the support frame, a hopper module is connected to the top of the heat exchange module, and a discharge module is connected to the bottom of the heat exchange module. The hopper module has an upper opening for feeding materials, and the discharge module has a lower opening for discharging materials. A switch module is installed at the upper opening of the hopper to control the opening or closing of the upper opening. An air inlet is provided to introduce an isolation medium into the outer shell of the hopper module, forming an air curtain below the upper opening of the hopper to prevent materials from contacting the outside air and improve the airtightness of the feeding process.

[0023] 2. During normal feeding, the switch module remains open, and the airflow module does not need to operate, thus meeting the heat exchange requirements of materials in conventional fields. During airtight feeding, the switch module is first closed and the airflow module is opened to create an air curtain below the opening on the hopper to isolate air. Then, the switch module is opened to prevent air from being brought into the equipment during the feeding process, which could cause the material to deteriorate and become unusable. This meets the heat exchange requirements of materials in special fields (such as materials that are sensitive to air contact or materials that are hazardous), and has high compatibility. Attached Figure Description

[0024] Figure 1 The figure shown is an overall perspective view of the switch module of the present invention in the open state; Figure 2 The figure shown is an overall perspective view of the switch module of the present invention in the closed state; Figure 3 The diagram shown is a schematic of the switch module of the present invention in the open state; Figure 4 The diagram shown is a schematic of the closed state of the switch module of the present invention; Figure 5The figure shown is a front cross-sectional view of the present invention; Figure 6 The figure shown is a side cross-sectional view of the present invention; Figure 7 The image shown is a top view of the switch module of the present invention in the open state; Figure 8 The image shown is a top view of the switch module of the present invention in the closed state.

[0025] In the diagram: 1. Support frame; 2. Heat exchange module; 3. Hopper module; 4. Switch module; 5. Discharge module; 101. Crossbeam; 201. Heat exchange module housing; 202. Heat exchange plate assembly; 203. Heat exchange medium inlet; 204. Heat exchange medium outlet; 301. Hopper module outer shell; 302. Air inlet; 3011. Equal width section; 3012. Narrowing section; 401. First moving part; 402. Second moving part; 403. First cylinder; 404. Second cylinder; 405. Fixed plate; 406. Locking part; 4011, First base plate; 4012, First inclined plate; 4013, First side plate; 4014, First connecting rib; 4021. Second base plate; 4022. Second inclined plate; 4023. Second side plate; 501. Discharge module housing; 502. Pneumatic vibrator; 503. Slide valve. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used 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," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Example Reference Figures 1 to 8 This embodiment provides a closed-loop feed heat exchanger, specifically including: a support frame 1; a heat exchange module 2, disposed above the support frame 1, the heat exchange module 2 including a heat exchange module housing 201, the heat exchange module housing 201 having an upper heat exchange opening and a lower heat exchange opening, and a heat exchange plate assembly 202 disposed inside the heat exchange module housing 201 for heat exchange of materials; and a hopper module 3, the hopper module 3 including a hopper module housing 301, the hopper module housing 301 having an upper hopper opening and a lower hopper opening, the upper hopper opening for feeding materials, and the hopper module housing 301 being provided with... An air inlet 302 is provided, which is used to connect to the airflow module to introduce the isolation medium into the hopper module housing 301. The lower opening of the hopper is connected to the upper opening of the heat exchanger. A switch module 4 is provided at the top of the upper opening of the hopper. The switch module 4 includes an open state and a closed state. In the open state, the upper opening of the hopper is open. In the closed state, the upper opening of the hopper is closed. A discharge module 5 is provided, which includes a discharge module housing 501. The discharge module housing 501 includes a discharge upper opening and a discharge lower opening. The discharge upper opening is connected to the lower opening of the heat exchanger. The discharge lower opening is used to discharge materials.

[0030] The heat exchange plate assembly 202 has an upper spacer bar at the top and a lower spacer bar at the bottom. The heat exchange plate assembly 202 is a commonly used mechanism in this field, and its specific structure will not be described in detail in this application.

[0031] The isolation medium can be an inert gas, such as nitrogen. The airflow module can be a nitrogen delivery device.

[0032] It provides excellent airtight protection and effectively prevents material oxidation. By conveying protective gas to form an air curtain, and working with switch module 4 to seal the feed inlet, the equipment is completely isolated from external air, significantly improving the material's ability to resist oxidation.

[0033] The hopper module housing 301 includes a connected equal-width portion 3011 and a narrowed portion 3012. The top of the equal-width portion 3011 is the upper opening of the hopper, and the bottom of the narrowed portion 3012 is the lower opening of the hopper. There is at least one air inlet 302, which is located on the side of the equal-width portion 3011.

[0034] like Figure 6 As shown, there can be two air inlets 302, symmetrically arranged on both sides of the hopper module housing 301. The airflow provided by the airflow module is controlled within a reasonable range, that is, it can form an air curtain to isolate the air without affecting the normal falling of the material. Setting two air inlets 302 can form a relative airflow below the opening on the hopper, avoiding the material from being affected by the unidirectional lateral airflow and causing the falling path to deviate. This allows the material to fall evenly into the heat exchange plate assembly 202, thereby improving heat exchange efficiency. Since the airflow provided by the airflow module is controlled within a reasonable range, the upward or downward airflow generated by the convection of the two air inlets 302 has a negligible impact on the falling of the material.

[0035] The switch module 4 includes a first movable member 401 and a second movable member 402 arranged opposite to each other. In the open state, the first movable member 401 and the second movable member 402 are disengaged to open the upper opening of the hopper. In the closed state, the first movable member 401 and the second movable member 402 are in contact to close the upper opening of the hopper.

[0036] A first cylinder 403 is connected to the side of the first movable member 401 facing away from the second movable member 402, and a second cylinder 404 is connected to the side of the second movable member 402 facing away from the first movable member 401. In the open state, the output ends of the first cylinder 403 and the second cylinder 404 retract inward, and in the closed state, the output ends of the first cylinder 403 and the second cylinder 404 extend outward.

[0037] There are two first cylinders 403 and two second cylinders 404. The two first cylinders 403 are spaced apart and arranged on the same side of the first movable part 401, and the two second cylinders 404 are spaced apart and arranged on the same side of the second movable part 402.

[0038] Both the first cylinder 403 and the second cylinder 404 are connected to a fixing plate 405, which is fixedly connected to the top of the hopper module housing 301.

[0039] The first movable component 401 includes a first base plate 4011. A first inclined plate 4012 and a first side plate 4013 are fixedly connected to the top of the first base plate 4011. The first inclined plate 4012 and the first side plate 4013 are arranged perpendicularly to each other. A first connecting rib 4014 is provided between the first base plate 4011 and the first inclined plate 4012. One side of the first connecting rib 4014 is fixedly connected to the output end of the first cylinder 403.

[0040] The second movable component 402 includes a second base plate 4021. A second inclined plate 4022 and a second side plate 4023 are fixedly connected to the top of the second base plate 4021. The second inclined plate 4022 and the second side plate 4023 are arranged perpendicularly to each other. A second connecting rib is provided between the second base plate 4021 and the second inclined plate 4022. One side of the second connecting rib is fixedly connected to the output end of the second cylinder 404. Both the first base plate 4011 and the second base plate 4021 are provided with strip grooves. A locking component 406 is provided at the strip groove.

[0041] Multiple strip grooves are provided near the edge of the first base plate 4011 or the second base plate 4021. The top of the hopper module housing 301 is provided with threaded holes that mate with the strip grooves. The locking member 406 has a threaded end. Through the cooperation of multiple locking members 406 and threaded holes, the first base plate 4011 and the second base plate 4021 are fixed to the top of the hopper module housing 301.

[0042] like Figure 3 and Figure 4 As shown, when the switch module 4 is in the open state, the first inclined plate 4012, the first side plate 4013, the second inclined plate 4022, and the second side plate 4023 form an open structure that is closed on all sides and open from top to bottom, and the open structure is located above the opening on the hopper. When the switch module 4 is in the closed state, the bottoms of the first inclined plate 4012 and the second inclined plate 4022 are in contact, closing the open structure and isolating it from the outside air.

[0043] At least two crossbeams 101 are arranged parallel to each other at the top of the support frame 1, and the heat exchange module housing 201 is fixedly connected to the two crossbeams 101 on both sides respectively.

[0044] The heat exchange module housing 201 has a heat exchange medium inlet 203 and a heat exchange medium outlet 204 connected to one side, with the heat exchange medium inlet 203 located below the heat exchange medium outlet 204.

[0045] The discharge module housing 501 is connected to a pneumatic vibrator 502, and a slide valve 503 is provided at the discharge lower opening.

[0046] This solution ensures that no air enters the equipment during the feeding process, increasing the material's resistance to oxidation. Based on the original equipment, this solution retains its original functions and environmental characteristics while featuring a compact and rationally laid-out structure, strong versatility, and no excess waste or exhaust gas is released into the environment, thus meeting environmental protection requirements and ensuring a green and clean production process.

[0047] Conventional feeding process: The output ends of the first cylinder 403 and the second cylinder 404 retract, driving the first movable part 401 and the second movable part 402 to move in opposite directions. When they reach their maximum stroke, the locking member 406 fixes the first base plate 4011 and the second base plate 4021, thereby fixing the first movable part 401 and the second movable part 402. At this time, the first inclined plate 4012, the first side plate 4013, the second inclined plate 4022, and the second side plate 4023 form an open structure that is closed on all sides and open from top to bottom. The material is fed into the open structure, enters the heat exchange module 2 to complete the heat exchange, and is finally output by the discharge module 5.

[0048] Airtight feeding process: The output ends of the first cylinder 403 and the second cylinder 404 extend, driving the first movable part 401 and the second movable part 402 to move in a closer direction until the first inclined plate 4012 contacts the second inclined plate 4022. Then the airflow module is opened, and the isolation medium is introduced into the hopper module housing 301 through the air inlet 302 to form an air curtain to isolate the air. Then the output ends of the first cylinder 403 and the second cylinder 404 are retracted, and the material is fed in through the open structure. After entering the heat exchange module 2 to complete the heat exchange, it is finally output by the discharge module 5.

[0049] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A closed-loop feed heat exchanger, characterized in that, include: Support frame (1); A heat exchange module (2) is located above the support frame (1). The heat exchange module (2) includes a heat exchange module shell (201), which has an upper heat exchange opening and a lower heat exchange opening. A heat exchange plate group (202) is provided inside the heat exchange module shell (201), which is used to exchange heat with the material. The hopper module (3) includes a hopper module shell (301), which has an upper opening and a lower opening. The upper opening is used to feed materials, and the hopper module shell (301) is provided with an air inlet (302). The air inlet (302) is used to connect to an airflow module to introduce an isolation medium into the hopper module shell (301). The lower opening is connected to the heat exchange upper opening. A switch module (4) is located at the top of the opening of the hopper. The switch module (4) includes an open state and a closed state. In the open state, the opening of the hopper is open, and in the closed state, the opening of the hopper is closed. The discharge module (5) includes a discharge module housing (501), which includes an upper discharge opening and a lower discharge opening. The upper discharge opening is connected to the lower heat exchange opening, and the lower discharge opening is used to output materials.

2. The closed-feed heat exchanger according to claim 1, characterized in that, The hopper module housing (301) includes a connected equal-width portion (3011) and a narrowed portion (3012). The top of the equal-width portion (3011) is the upper opening of the hopper, and the bottom of the narrowed portion (3012) is the lower opening of the hopper. There is at least one air inlet (302) and it is located on the side of the equal-width portion (3011).

3. The closed-feed heat exchanger according to claim 1, characterized in that, The switch module (4) includes a first movable member (401) and a second movable member (402) arranged opposite to each other. In the open state, the first movable member (401) and the second movable member (402) are disengaged to open the opening on the hopper. In the closed state, the first movable member (401) and the second movable member (402) are in contact to close the opening on the hopper.

4. The closed-feed heat exchanger according to claim 3, characterized in that, The first movable part (401) is connected to a first cylinder (403) on the side facing away from the second movable part (402), and the second movable part (402) is connected to a second cylinder (404) on the side facing away from the first movable part (401). In the open state, the output ends of the first cylinder (403) and the second cylinder (404) retract inward. In the closed state, the output ends of the first cylinder (403) and the second cylinder (404) extend outward.

5. The closed-feed heat exchanger according to claim 4, characterized in that, The first cylinder (403) and the second cylinder (404) are both connected to a fixing plate (405), and the fixing plate (405) is fixedly connected to the top of the hopper module housing (301).

6. The closed-feed heat exchanger according to claim 4, characterized in that, The first movable component (401) includes a first base plate (4011), a first inclined plate (4012) and a first side plate (4013) are fixedly connected to the top of the first base plate (4011), the first inclined plate (4012) and the first side plate (4013) are arranged perpendicularly to each other, a first connecting rib (4014) is provided between the first base plate (4011) and the first inclined plate (4012), and one side of the first connecting rib (4014) is fixedly connected to the output end of the first cylinder (403).

7. The closed-feed heat exchanger according to claim 6, characterized in that, The second movable component (402) includes a second base plate (4021), a second inclined plate (4022) and a second side plate (4023) are fixedly connected to the top of the second base plate (4021), the second inclined plate (4022) and the second side plate (4023) are arranged perpendicularly to each other, a second connecting rib is provided between the second base plate (4021) and the second inclined plate (4022), one side of the second connecting rib is fixedly connected to the output end of the second cylinder (404), and both the first base plate (4011) and the second base plate (4021) are provided with strip grooves, and a locking component (406) is provided at the strip grooves.

8. The closed-feed heat exchanger according to claim 1, characterized in that, The support frame (1) has at least two horizontal beams (101) spaced parallel to each other at the top, and the heat exchange module shell (201) is fixedly connected to the two horizontal beams (101) on both sides respectively.

9. The closed-feed heat exchanger according to claim 1, characterized in that, The heat exchange module housing (201) is connected to a heat exchange medium inlet (203) and a heat exchange medium outlet (204) on one side, and the heat exchange medium inlet (203) is located below the heat exchange medium outlet (204).

10. The closed-feed heat exchanger according to claim 1, characterized in that, The discharge module housing (501) is connected to a pneumatic vibrator (502), and a slide valve (503) is provided at the discharge lower opening.

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