Closed circulation heat recovery device of air energy heat pump
By designing a closed-circulating heat recovery device for air energy heat pumps, the cyclone dust collector is used to remove dust and heat recovery of waste gas during the grain drying process, the problem of waste gas not being directly utilized by the air source heat pump is solved, and efficient energy saving and pollution reduction is achieved.
Patent Information
- Application Number
- CN202421886072.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-08-05
AI Technical Summary
During the grain drying process, waste gas with waste heat cannot be directly recycled and utilized by the air source heat pump, resulting in the energy-saving effect of the heat pump being unable to be fully reflected, and the emission of dust-containing gases causes environmental pollution.
A closed-circulating heat recovery device for air energy heat pumps is designed, including waste heat recovery bellows, centrifugal fans, cyclone dust collectors and ash collectors. The device removes dust and heat recovery of the exhaust gas through a cyclone dust collector, realizing the purification of the exhaust gas and recycling of waste heat.
The purification and recycling of waste gases are realized, and the problem of waste gas cannot be directly utilized by the air source heat pump is solved. It saves energy by more than 20%, reduces pollutant emissions by more than 35%, and ensures the quality of rice drying.
Smart Images
Figure CN222895487U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat energy recovery, in particular to a closed-cycle heat recovery device of an air energy heat pump. Background Art
[0002] Saving grain and reducing losses in the grain drying process is of great significance to ensuring food security. The development of grain drying machinery is also an important guarantee for a bumper grain harvest and yield.
[0003] In the "dual carbon" environment, it is a general trend for grain dryers to choose clean energy - air source heat pumps. Air source heat pump drying has been widely used in the agricultural and sideline products processing industry, but in the field of grain drying, although many companies have done a lot of research and experiments, and have also carried out productive operations in local areas, they cannot solve the key problem of waste heat recovery from dryer exhaust gas, and the energy-saving effect of heat pumps cannot be fully reflected; at the same time, if the dust-containing gas is directly discharged into the air during grain dryer operation, it will cause serious environmental pollution.
[0004] At present, the exhaust gas of the dryer cannot be directly recycled by the air energy heat pump dryer. It requires multiple exhaust gas treatment processes such as dust removal, dehumidification and heat exchange. Therefore, there is a need for a device that can treat the exhaust gas of the dryer and recycle the waste heat at the same time. Utility Model Content
[0005] The purpose of the utility model is to provide a closed-cycle heat recovery device of an air energy heat pump which can purify waste gas and realize waste heat recycling and utilization at the same time, so as to solve the problem in the above-mentioned background technology that waste gas with waste heat cannot be directly recycled and utilized by an air energy heat pump dryer.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] The closed cycle heat recovery device of the air energy heat pump includes:
[0008] A waste heat recovery wind box connected to the exhaust gas outlet side of the dryer, wherein an upper partition and a lower partition are horizontally arranged inside the waste heat recovery wind box to divide the interior of the waste heat recovery wind box into three layers: upper, middle and lower. A plurality of waste gas inlets connected to the dryer are arranged on the back of the middle part of the waste heat recovery wind box, and a fresh air inlet connected to the outside is arranged on the left side of the lower part of the waste heat recovery wind box, and a hot air outlet connected to the air inlet end of the dryer evaporator is arranged on the right side;
[0009] Centrifugal fans respectively arranged at the left and right ends of the upper part of the waste heat recovery wind box and used for sucking the waste gas entering the upper part of the waste heat recovery wind box;
[0010] A plurality of cyclone dust collectors are evenly arranged from left to right inside the waste heat recovery wind box, and are used to perform cyclone dust removal on the hot exhaust gas entering the middle of the waste heat recovery wind box and absorb the heat in the exhaust gas to achieve self-heating;
[0011] An ash collecting box is arranged directly below the waste heat recovery wind box and is respectively connected to the bottom ends of the plurality of cyclone dust collectors.
[0012] Furthermore, a vertical partition dividing the upper part of the waste heat recovery wind box into two is provided in the middle of the upper part of the waste heat recovery wind box.
[0013] Further, the single cyclone dust collector comprises:
[0014] A dust collector air inlet located in the middle of the waste heat recovery wind box for sucking in hot exhaust gas;
[0015] The top is connected to the upper part of the waste heat recovery wind box and is used to discharge the purified waste gas from the dust collector outlet, and the upper partition is provided with a hole corresponding to the dust collector outlet;
[0016] The bottom passes through the ash discharge port extending downward from the lower part of the waste heat recovery wind box.
[0017] Furthermore, the bottom of the lower part of the waste heat recovery wind box is provided with dust collector cleaning inspection doors corresponding to the cyclone dust collectors one by one, and the bottom of each cyclone dust collector is provided with a corresponding cleaning port.
[0018] Furthermore, the exhaust gas inlets correspond one-to-one to the cyclone dust collectors, and the number is no less than 6.
[0019] Furthermore, a plurality of wind box cleaning and maintenance doors are respectively provided on the upper and middle parts of the waste heat recovery wind box.
[0020] Beneficial effects:
[0021] The utility model can simultaneously purify the waste gas after grain drying and recycle the waste heat through indirect heat exchange, integrating the waste gas treatment and waste heat recovery into one, solving the problem that the waste gas cannot be directly utilized by the air source heat pump, and has a compact structure and good waste heat recovery effect. Compared with traditional hot air drying, it can achieve energy saving of more than 20%, reduce pollutant emissions by more than 35%, and at the same time ensure the quality of rice drying. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.
[0024] Figure 2 For Figure 1 On the basis of, after the front side panel is set to be transparent, the internal structure schematic diagram of the utility model is:
[0025] Figure 3 This is a three-dimensional structural schematic diagram of an angle in the utility model.
[0026] Figure 4 It is a schematic diagram of the structure of the upper baffle 11, the lower baffle 12 and the multiple cyclone dust collectors 3 inside the utility model.
[0027] The reference numerals are as follows:
[0028] Waste heat recovery wind box 1, upper partition 11, lower partition 12, exhaust air inlet 13, fresh air inlet 14, hot air outlet 15, vertical partition 16, dust collector cleaning inspection door 17, wind box cleaning inspection door 18;
[0029] Centrifugal fan 2;
[0030] Cyclone dust collector 3, dust collector air inlet 31, dust collector air outlet 32, dust discharge outlet 33, dust cleaning outlet 34;
[0031] Dust collecting box 4. DETAILED DESCRIPTION
[0032] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.
[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0034] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0035] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0037] See also Figure 1-4 The utility model provides a closed-cycle heat recovery device for an air energy heat pump, comprising a waste heat recovery wind box 1, two centrifugal fans 2, a plurality of cyclone dust collectors 3 and a dust collection box 4, wherein:
[0038] The waste heat recovery wind box 1 is arranged at the exhaust gas outlet side of the dryer and is connected to the exhaust gas outlet side of the dryer. An upper partition 11 and a lower partition 12 are horizontally arranged in the waste heat recovery wind box 1 to divide the interior of the waste heat recovery wind box 1 into three layers: upper, middle and lower. A plurality of waste gas inlets 13 connected to the dryer are arranged on the back of the middle part of the waste heat recovery wind box 1. A fresh air inlet 14 connected to the outside is arranged on the left side of the lower part of the waste heat recovery wind box 1, and a hot air outlet 15 connected to the air inlet end of the dryer evaporator is arranged on the right side.
[0039] The dryer is an existing air-energy heat pump dryer. The low-temperature and low-pressure working medium in the heat pump enters the air-side evaporator to evaporate and absorb heat after being throttled and reduced in pressure by the expansion mechanism, and absorbs a large amount of heat from the air; the working medium after evaporation and heat absorption enters the compressor in gaseous form, and after being compressed, it becomes a high-temperature and high-pressure working medium (at this time, the heat contained in the working medium is divided into two parts: one part is the heat Q1 absorbed from the air, and the other part is the heat Q2 converted from the electric energy input into the compressor when compressing the working medium); the compressed high-temperature and high-pressure working medium enters the condenser through the pipeline, and releases the heat (Q1+Q2) it contains to the low-temperature air passing through the condenser, and heats the low-temperature air to form high-temperature hot air that enters the dryer to heat the material to achieve material drying; the working medium after heat release enters the expansion mechanism in liquid form, throttles and reduces pressure, and circulates continuously in this way. During the material drying process, waste gas with a certain temperature will be generated. The waste gas contains dust, moisture and a large amount of heat. After a period of operation, this part of the waste gas needs to be discharged and new air is introduced through the evaporator fan. Therefore, existing dryers should be equipped with a channel for exhausting waste gas, and the channel for exhausting waste gas can also be regarded as the exhaust gas outlet side of the utility model.
[0040] Two centrifugal fans 2 are symmetrically arranged at the left and right ends of the upper part of the waste heat recovery wind box 1, and are used to suck the exhaust gas entering the upper part of the waste heat recovery wind box 1 to form a negative pressure. The model and power of the centrifugal fans 2 are adapted according to actual needs and are not limited;
[0041] Multiple cyclone dust collectors 3 are evenly arranged inside the waste heat recovery wind box 1 from left to right. Figure 2 The exhaust gas inlet 13 corresponds to the cyclone dust collector 3 one by one, and the number is not less than 6. The cyclone dust collector 3 is used to perform cyclone dust removal on the hot exhaust gas entering the middle of the waste heat recovery wind box 1 and absorb the heat in the exhaust gas to achieve its own heating. Specifically, a single cyclone dust collector 3 includes:
[0042] A dust collector air inlet 31 located in the middle of the waste heat recovery wind box 1 for sucking in hot waste gas;
[0043] The top is connected to the upper part of the waste heat recovery wind box 1, and is used to discharge the purified waste gas through the dust collector outlet 32. The upper partition 11 is provided with a hole corresponding to the dust collector outlet 32. It should be noted that the dust collector outlet 32 and the upper partition 11 are welded and fixed without a gap, so as to ensure that the upper and middle layers of the waste heat recovery wind box 1 are independent of each other in structure and do not communicate with each other;
[0044] The bottom passes through the ash discharge port 33 extending downward from the lower part of the waste heat recovery wind box 1;
[0045] The dust collecting box 4 is arranged directly below the waste heat recovery wind box 1 and is respectively connected to the bottom ends of the multiple cyclone dust collectors 3. It is used to collect the dust and impurities processed by the multiple cyclone dust collectors 3 together and then process them centrally.
[0046] In order to reduce the mutual influence between the two centrifugal fans 2 , a vertical partition plate 16 is provided in the middle of the upper part of the waste heat recovery wind box 1 to divide the upper part of the waste heat recovery wind box 1 into two parts.
[0047] In order to facilitate the later maintenance and cleaning of the waste heat recovery wind box 1 and the cyclone dust collector 3, dust collector cleaning inspection doors 17 corresponding to the cyclone dust collectors 3 are provided at the bottom of the lower part of the waste heat recovery wind box 1, and corresponding cleaning ports 34 are provided at the bottom of each cyclone dust collector 3. A plurality of wind box cleaning inspection doors 18 are respectively provided at the upper and middle parts of the waste heat recovery wind box 1.
[0048] The closed-cycle heat recovery device of the air energy heat pump of the utility model can be adapted to the existing dryer and has a wide range of applications. The waste heat recovery bellows 1 is arranged on the existing product in the form of a detachable assembly, and then the middle part of the waste heat recovery bellows 1 is connected to the exhaust gas outlet side of the dryer.
[0049] Working principle:
[0050] Two centrifugal fans 2 suck the air on the upper part of the waste heat recovery wind box 1 to form a negative pressure, so that the dust collector outlet 32 of each cyclone dust collector 3 located on the upper part of the waste heat recovery wind box 1 also forms a negative pressure. The dust collector inlet 31 of the cyclone dust collector 3 is connected with the exhaust gas outlet side of the dryer through a one-to-one corresponding exhaust gas inlet 13. Driven by the negative pressure, the waste gas containing dust, impurities and heat is sucked into the cyclone dust collector 3 from the exhaust gas outlet side of the dryer for dust removal. The dust and impurities are sunk into the dust collecting box 4 after the cyclone dust removal. In this process, the waste gas with waste heat simultaneously exchanges heat with each cyclone dust collector 3, heats the cyclone dust collector 3, and increases the temperature of the cyclone dust collector 3 itself.
[0051] While the exhaust gas is discharged from the exhaust gas outlet side of the dryer, the dryer evaporator will also inhale fresh air. In this process, the fresh cold air from the outside enters the lower part of the waste heat recovery wind box 1 through the fresh air inlet 14 on the left side of the lower part of the waste heat recovery wind box 1. The fresh cold air entering the lower part of the waste heat recovery wind box 1 then exchanges heat with the heated cyclone dust collector 3 to achieve the heating of the fresh air. The heated fresh air enters the evaporator for more efficient heat exchange, thereby realizing the exhaust gas treatment and closed-cycle heat recovery and utilization.
[0052] The utility model can simultaneously clean the waste gas after grain drying and recycle the waste heat through indirect heat exchange, integrating the waste gas treatment and waste heat recovery into one, solving the problem that the waste gas cannot be directly utilized by the air source heat pump, and has a compact structure and good waste heat recovery effect. Compared with traditional hot air drying, it can achieve energy saving of more than 20%, reduce pollutant emissions by more than 35%, and at the same time ensure the quality of rice drying.
[0053] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A closed cycle heat recovery device for an air energy heat pump, characterized in that: include: A waste heat recovery wind box (1) is connected to the exhaust gas outlet side of the dryer, wherein an upper partition (11) and a lower partition (12) are horizontally arranged inside the waste heat recovery wind box (1) to divide the interior of the waste heat recovery wind box (1) into three layers: upper, middle and lower. A plurality of waste gas inlets (13) connected to the dryer are arranged on the back of the middle part of the waste heat recovery wind box (1), and a fresh air inlet (14) connected to the outside is arranged on the left side of the lower part of the waste heat recovery wind box (1), and a hot air outlet (15) connected to the air inlet end of the dryer evaporator is arranged on the right side; Centrifugal fans (2) are respectively arranged at the left and right ends of the upper part of the waste heat recovery wind box (1) and are used to suck the waste gas entering the upper part of the waste heat recovery wind box (1); A plurality of cyclone dust collectors (3) are evenly arranged from left to right inside the waste heat recovery wind box (1), and are used to perform cyclone dust removal on the hot waste gas entering the middle of the waste heat recovery wind box (1) and absorb heat in the waste gas to achieve self-heating; A dust collecting box (4) is arranged directly below the waste heat recovery wind box (1) and is connected to the bottom ends of the plurality of cyclone dust collectors (3).
2. The closed-cycle heat recovery device of the air energy heat pump according to claim 1 is characterized in that: A vertical partition plate (16) is provided in the middle of the upper part of the waste heat recovery wind box (1) for dividing the upper part of the waste heat recovery wind box (1) into two.
3. The closed cycle heat recovery device of the air energy heat pump according to claim 1, characterized in that: The single cyclone dust collector (3) comprises: A dust collector air inlet (31) located in the middle of the waste heat recovery wind box (1) and used for sucking in hot waste gas; The top is connected to the upper part of the waste heat recovery wind box (1) and is used for discharging the dust collector outlet (32) of the purified waste gas, and the upper partition plate (11) is provided with a hole corresponding to the dust collector outlet (32); The bottom of the waste heat recovery wind box (1) extends downward through an ash discharge port (33).
4. The closed-cycle heat recovery device of the air energy heat pump according to claim 3 is characterized in that: The bottom of the lower part of the waste heat recovery wind box (1) is provided with dust collector cleaning inspection doors (17) corresponding to the cyclone dust collectors (3) one by one, and the bottom of each cyclone dust collector (3) is provided with a corresponding cleaning port (34).
5. The closed-cycle heat recovery device of the air energy heat pump according to claim 1 is characterized in that: The exhaust gas inlets (13) correspond one to one with the cyclone dust collectors (3), and the number is no less than 6.
6. The closed-cycle heat recovery device of the air energy heat pump according to claim 1, characterized in that: The upper part and the middle part of the waste heat recovery wind box (1) are respectively provided with a plurality of wind box cleaning inspection doors (18).