Waste heat utilization system

Abstract

The utility model relates to the technical field of waste heat utilization, and provides a waste heat utilization system which comprises an air supply mechanism, the air supply mechanism comprises at least one air supply assembly, each air supply assembly comprises an air supply pipeline and a first fan installed on the air supply pipeline, the air inlet end of each air supply pipeline is suitable for being installed in a pretreatment workshop, and the air outlet end of each air supply pipeline is suitable for being installed in the pretreatment workshop. The air outlet end of the air supply pipeline is suitable for being installed in the packaging workshop. The space of the pretreatment workshop and the space of the packaging workshop are connected through the air supply assembly, waste heat recovery is achieved, the temperature of the pretreatment workshop is effectively reduced, meanwhile, air conditioner energy consumption of the packaging workshop is reduced, and the purposes of energy conservation and emission reduction are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat utilization technical field especially relates to a waste heat utilization system. BACKGROUND

[0002] The cooperation of multiple workshops is involved in the dairy product production process, for example, the dairy product production workshop includes a pretreatment workshop and a packaging workshop, the pretreatment workshop has a high temperature most of the time due to the type of equipment, the packaging workshop area is large and has a spacious layout, and there is no steam type heating equipment, so the ambient temperature is not high most of the time, especially in winter, the workshop ambient temperature will be lower. As such, the pretreatment workshop still has surplus heat in winter, which needs to be discharged to the outdoor atmosphere, and the packaging workshop needs to be heated in winter, which causes energy waste. SUMMARY

[0003] The utility model provides a waste heat utilization system to solve the problem of heat waste in the pretreatment workshop in winter in the prior art.

[0004] The utility model provides a waste heat utilization system, which comprises:

[0005] The air supply mechanism comprises at least one air supply assembly, each air supply assembly comprises an air supply pipeline and a first fan installed on the air supply pipeline, the air inlet end of the air supply pipeline is adapted to be installed on the pretreatment workshop, and the air outlet end of the air supply pipeline is adapted to be installed on the packaging workshop.

[0006] According to the waste heat utilization system provided by the utility model, the air supply mechanism further comprises a control mainboard and a first temperature sensor, the first temperature sensor is installed on the packaging workshop, and the first fan and the first temperature sensor are electrically connected with the control mainboard.

[0007] According to the waste heat utilization system provided by the utility model, the control mainboard is configured to start the first fan when the temperature value of the first temperature sensor is less than a first target temperature value, and the first target temperature value corresponds to the packaging workshop.

[0008] According to the waste heat utilization system provided by the utility model, the air supply mechanism further comprises a second temperature sensor, the second temperature sensor is installed on the pretreatment workshop, and the second temperature sensor is electrically connected with the control mainboard.

[0009] In the case where the temperature value of the first temperature sensor is less than the first target temperature value and the temperature value of the second temperature sensor is greater than the temperature value of the first temperature sensor, the control mainboard is configured to start the first fan.

[0010] According to the waste heat utilization system provided by this utility model, the pretreatment workshop is equipped with an exhaust fan, the exhaust fan is electrically connected to the control main board, and the control main board is further configured to start the exhaust fan when the temperature value of the second temperature sensor is greater than the second target temperature value; wherein, the second target temperature value corresponds to the pretreatment workshop.

[0011] According to the waste heat utilization system provided by this utility model, there are multiple air supply components, and multiple air outlets of the multiple air supply pipes are distributed in the packaging workshop.

[0012] According to the waste heat utilization system provided by this utility model, the first fan is an axial flow fan.

[0013] According to the waste heat utilization system provided by this utility model, the pretreatment workshop is equipped with a first air conditioning unit, the air outlet side of the first air conditioning unit is connected to the pretreatment workshop through a first pipe, and the first pipe is equipped with a first fire damper.

[0014] According to the waste heat utilization system provided by this utility model, the packaging workshop is equipped with a second air conditioning unit, the air outlet side of the second air conditioning unit is connected to the pretreatment workshop through a second pipe, and the second pipe is equipped with a second fire damper.

[0015] According to the waste heat utilization system provided by this utility model, the air supply component further includes a filter screen, and the filter screen is installed inside the air supply duct.

[0016] The waste heat recovery system provided by this utility model has its air inlet located inside the pre-processing workshop and its air outlet located inside the packaging workshop. In this way, excess heat energy from the pre-processing workshop can be transferred to the packaging workshop via the air supply assembly. In other words, by connecting the spaces of the pre-processing and packaging workshops through the air supply assembly, waste heat recovery is achieved, effectively reducing the temperature in the pre-processing workshop and simultaneously reducing the air conditioning energy consumption of the packaging workshop, thus achieving the goal of energy conservation and emission reduction. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the waste heat utilization system provided by this utility model.

[0019] Figure label:

[0020] 1. Pre-processing workshop; 2. Packaging workshop; 3. Air supply assembly; 31. Air supply duct; 32. First fan; 4. Exhaust fan; 5. First air conditioning unit; 51. First fresh air inlet; 52. First primary filter; 53. Second fan; 54. First medium-efficiency filter; 6. First duct; 7. First fire damper; 8. Second air conditioning unit; 81. Second fresh air inlet; 82. Second primary filter; 83. Cooling water coil; 84. Third fan; 85. Steam coil; 86. Second medium-efficiency filter; 871. Steam delivery pipe; 872. Condensate return pipe; 881. Chilled water supply pipe; 882. Chilled water return pipe; 9. Second duct; 10. Second fire damper. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions 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 scope of protection of this utility model.

[0022] The following is combined with Figure 1 This invention describes a waste heat utilization system.

[0023] like Figure 1 As shown, the waste heat utilization system of this utility model embodiment is applied to a dairy product production workshop, which includes a pre-processing workshop 1, a packaging workshop 2, a filling workshop, etc.

[0024] The pretreatment workshop 1 is equipped with a first air conditioning unit 5, which provides cooling to the pretreatment workshop 1. The air outlet of the first air conditioning unit 5 is connected to the pretreatment workshop 1 via a first pipe 6, and a first fire damper 7 is installed on the first pipe 6. In this way, if a malfunction or fire occurs inside the first air conditioning unit 5, causing an abnormal increase in the temperature on the air outlet side of the first air conditioning unit 5, the first fire damper 7 can control the further spread of the accident.

[0025] Specifically, the first air conditioning unit 5 includes a second fan 53, a first primary filter 52 and a first medium-efficiency filter 54. The second fan 53 is located between the first primary filter 52 and the first medium-efficiency filter 54. The air entering through the first fresh air inlet 51 passes through the first primary filter 52 and the first medium-efficiency filter 54 in sequence before flowing into the first duct 6 and finally into the pretreatment workshop 1.

[0026] In addition, a second air conditioning unit 8 is installed in the packaging workshop 2. The second air conditioning unit 8 is used to provide cooling or heating to the packaging workshop 2. The air outlet side of the second air conditioning unit 8 is connected to the pre-processing workshop 1 through a second pipe 9, and a second fire damper 10 is installed in the second pipe 9. In this way, if a malfunction or fire occurs inside the second air conditioning unit 8, causing an abnormal increase in the temperature on the air outlet side of the second air conditioning unit 8, the second fire damper 10 can control the further spread of the accident.

[0027] Specifically, the second air conditioning unit 8 includes a steam coil 85, a cooling water coil 83, a third fan 84, a second primary filter 82, and a second medium-efficiency filter 86. Along the airflow direction, the second primary filter 82, cooling water coil 83, third fan 84, steam coil 85, and second medium-efficiency filter 86 are arranged sequentially. The steam coil 85 is connected to a steam delivery pipe 871 and a condensate return pipe 872. The cooling water coil 83 is connected to a chilled water supply pipe 881 and a chilled water return pipe 882. The air entering through the second fresh air inlet 81 passes sequentially through the second primary filter 82, cooling water coil 83, steam coil 85, and second medium-efficiency filter 86 before flowing into the second pipe 9 and finally entering the packaging workshop 2.

[0028] like Figure 1 As shown, the waste heat utilization system of this utility model embodiment includes: an air supply mechanism. The air supply mechanism includes at least one air supply component 3, each air supply component 3 includes an air supply duct 31 and a first fan 32 installed on the air supply duct 31. The air inlet end of the air supply duct 31 is suitable for installation in the pre-processing workshop 1, and the air outlet end of the air supply duct 31 is suitable for installation in the packaging workshop 2.

[0029] It should be noted that the first fan 32 is an axial flow fan. An axial flow fan is a type of fan in which the airflow direction is the same as the axis of the impeller. Its working principle is that the rotation of the impeller draws in gas from one side of the fan and discharges it from the other side. For example, the air volume of the axial flow fan is 10,000 m³ / h.

[0030] Specifically, the air inlet of the air supply duct 31 is located at the top of the pretreatment workshop 1, the air supply duct 31 spans the ceiling of the filling workshop, and the air outlet of the air supply duct 31 is located inside the packaging workshop 2. In this way, the heat energy inside the pretreatment workshop 1 can be transferred to the packaging workshop 2 through the air supply assembly 3.

[0031] The air supply assembly 3 is responsible for delivering treated air to various areas of the packaging workshop 2. To ensure the air quality delivered to the packaging workshop 2, the air supply assembly 3 also includes a filter screen, which is installed inside the air supply duct 31 to filter out impurities such as dust, bacteria, and pollen from the air. Thus, the first fan 32 generates power to propel the air through the air supply duct 31; the air supply duct 31 is responsible for delivering the air to designated areas; and the filter screen, installed inside the air supply duct 31, filters the air.

[0032] Based on their filtration efficiency, air filters can be categorized into pre-filters, medium-efficiency filters, and high-efficiency filters. Pre-filters primarily filter large particles such as dust and fibers; medium-efficiency filters filter small particles and bacteria; and high-efficiency filters filter tiny particles and harmful gases.

[0033] In practical applications, filters are typically installed at the air inlet of the air supply duct 31 to ensure that the air entering the duct 31 is filtered first. Filters may also need to be installed at multiple locations within the air supply duct 31 to improve filtration efficiency. Thus, through its unique fiber structure or filter material, the filter effectively captures impurities in the air, ensuring that the air delivered into the packaging workshop 2 is fresher and healthier.

[0034] In this embodiment of the invention, the air inlet of the air supply duct 31 is located inside the pretreatment workshop 1, and the air outlet of the air supply duct 31 is located inside the packaging workshop 2. Thus, the air supply assembly 3 can transfer excess heat from the pretreatment workshop 1 to the packaging workshop 2. In other words, by connecting the spaces of the pretreatment workshop 1 and the packaging workshop 2 through the air supply assembly 3, waste heat recovery is achieved, effectively reducing the temperature of the pretreatment workshop 1 and simultaneously reducing the air conditioning energy consumption of the packaging workshop 2, thereby achieving the goal of energy conservation and emission reduction.

[0035] In practical applications, the air supply mechanism also includes a control motherboard and a first temperature sensor. The first temperature sensor is installed in the packaging workshop 2, and both the first fan 32 and the first temperature sensor are electrically connected to the control motherboard.

[0036] It should be noted that the control motherboard can be an industrial-grade control motherboard, equipped with multiple data interfaces and processing capabilities, capable of quickly processing data from the first temperature sensor and controlling the operation of the first fan 32. The control motherboard should be installed inside the electrical control cabinet with appropriate protective measures to prevent dust and moisture intrusion.

[0037] In addition, the first temperature sensor can be a high-precision thermistor temperature sensor with a measurement range of 0~50℃ and an accuracy of ±0.5℃. The first temperature sensor is installed in the center of packaging workshop 2, 1.5 meters above the ground, to ensure accurate measurement of the average temperature within packaging workshop 2. This temperature sensor is electrically connected to the temperature signal input interface of the control mainboard via a shielded cable to reduce external interference.

[0038] In addition, the first fan 32 can be a high-volume, low-noise axial fan with an air volume range of 5000~10000 cubic meters / hour, and its speed can be adjusted according to the instructions of the control main board. The first fan 32 is electrically connected to the fan control interface of the control main board via a control cable.

[0039] In this embodiment of the utility model, the first fan 32, under the regulation of the control motherboard, can adjust its speed according to the actual temperature requirements in the packaging workshop 2, thereby achieving energy-saving operation, reducing the operating cost of the workshop, and reducing the air conditioning energy consumption of the packaging workshop 2.

[0040] In an optional embodiment, the control board is configured to activate the first fan 32 when the temperature value of the first temperature sensor is less than a first target temperature value, wherein the first target temperature value corresponds to the packaging workshop 2. The control board includes a comparison circuit.

[0041] For example, in winter, the control board first reads the pre-set temperature range corresponding to packaging workshop 2, i.e., 22~25℃. The first temperature sensor begins to monitor the temperature inside packaging workshop 2 in real time and transmits the temperature data to the control board in the form of an electrical signal. Assume that initially, the workshop temperature is 10℃, lower than the set lower limit. After receiving the data from the first temperature sensor, the control board analyzes and processes the data. According to the preset control logic, when the temperature is below 22℃, the control board sends a command to the first fan 32 to start the first fan 32 and increase its speed, increasing the air intake and thus raising the temperature of packaging workshop 2. For example, the speed of the first fan 32 increases from the initial 1000 rpm to 1500 rpm, and the air intake increases from 6000 cubic meters per hour to 8000 cubic meters per hour. As the first fan 32 operates, the temperature of packaging workshop 2 gradually rises. The first temperature sensor continuously monitors the temperature and feeds the data back to the control board. When the workshop temperature rises to 25℃, the control board, according to its control logic, reduces the speed of the first fan 32 to 1200 rpm and adjusts the air intake to 7000 cubic meters per hour, thus maintaining the workshop temperature within a stable range. The first temperature sensor continuously monitors the temperature in real time, and the control board adjusts the speed of the first fan 32 accordingly to ensure the workshop temperature is consistently maintained between 22℃ and 25℃.

[0042] In an optional embodiment, the air supply mechanism further includes a second temperature sensor, which is installed in the pretreatment workshop 1 and electrically connected to the control main board; wherein the control main board is configured to start the first fan 32 when the temperature value of the first temperature sensor is less than the first target temperature value and the temperature value of the second temperature sensor is greater than the temperature value of the first temperature sensor.

[0043] The second temperature sensor can be a high-precision platinum resistance temperature sensor, with a measurement range and accuracy consistent with the first temperature sensor. The second temperature sensor is installed in the central area of ​​pretreatment workshop 1, at a certain distance from the heat source to avoid localized overheating affecting measurement accuracy; the installation height is also 1.5 meters from the ground. The second temperature sensor is electrically connected to the corresponding interface on the control mainboard via a shielded cable.

[0044] The staff set the first target temperature value to 22℃ through the control motherboard's operating interface. After the control motherboard started, it entered real-time monitoring mode, continuously receiving temperature data from the first and second temperature sensors. The first temperature sensor measured the temperature in packaging workshop 2 to be 15℃, lower than the first target temperature value of 22℃; simultaneously, the second temperature sensor measured the temperature in pre-processing workshop 1 to be 28℃, significantly higher than the 15℃ in packaging workshop 2. After receiving the data from the two temperature sensors, the control motherboard analyzed it according to the preset logic judgment program. Since the temperature value of the first temperature sensor was lower than the first target temperature value, and the temperature value of the second temperature sensor was higher than the temperature value of the first temperature sensor, the conditions for starting the first fan 32 were met. The control motherboard immediately sent a start command to the first fan 32, and the first fan 32 began to operate at 50% speed, introducing the relatively warm air from pre-processing workshop 1 into packaging workshop 2, and the temperature in packaging workshop 2 gradually increased.

[0045] In addition, the first and second temperature sensors continuously monitor the temperature of their respective workshops in real time and feed the data back to the control board. When the temperature in packaging workshop 2 rises to 23°C, the control board, based on the preset temperature control range, determines that the current temperature is within a suitable range and sends a command to the first fan 32 to reduce its speed to 30%, maintaining slight airflow to keep the temperature stable. Throughout the process, the two temperature sensors continuously monitor the temperature, and the control board continuously adjusts the operating status of the first fan 32 according to temperature changes, ensuring that the temperature in packaging workshop 2 remains within a suitable range. Simultaneously, it makes efficient use of the heat from pre-processing workshop 1, achieving effective energy utilization, reducing additional heating energy consumption to a certain extent, lowering production costs, and improving energy efficiency.

[0046] In optional embodiments, such as Figure 1 As shown, the pretreatment workshop 1 is equipped with an exhaust fan 4, which is electrically connected to the control main board. The control main board is also configured to start the exhaust fan 4 when the temperature value of the second temperature sensor is greater than the second target temperature value; wherein, the second target temperature value corresponds to the pretreatment workshop 1.

[0047] It should be noted that the exhaust fan 4 can be a high-capacity centrifugal exhaust fan 4, installed on the top of the pretreatment workshop 1. Its maximum exhaust volume is 20,000 cubic meters per hour, and it is electrically connected to the control main board via a control cable, enabling it to start and stop quickly according to the instructions of the control main board.

[0048] For example, in summer, based on the production process and environmental requirements of pretreatment workshop 1, the second target temperature value is set to 30℃ via the control motherboard's operating interface. After the control motherboard starts, it automatically enters real-time monitoring mode, continuously receiving temperature data from the first and second temperature sensors. The second temperature sensor measures a temperature of 35℃ in pretreatment workshop 1, exceeding the second target temperature value of 30℃. After receiving the temperature data from the second temperature sensor, the control motherboard makes a judgment based on the preset control logic. Since the current temperature value is greater than the second target temperature value, the control motherboard immediately sends a start command to the exhaust fan 4. Upon receiving the command, the exhaust fan 4 quickly starts running at 80% speed to exhaust the hot air in pretreatment workshop 1. At the same time, the control motherboard continuously monitors the data from the second temperature sensor. As the exhaust fan 4 runs, the temperature in pretreatment workshop 1 gradually decreases. When the temperature drops to 29℃, the control motherboard, according to the preset control rules, sends a command to the exhaust fan 4 to reduce its speed to 30%, maintaining a certain exhaust volume to ensure air circulation and temperature stability within the workshop.

[0049] As shown above, the second temperature sensor continuously monitors the temperature of the pretreatment workshop 1 in real time, and the control board adjusts the operation of the exhaust fan 4 in a timely manner according to temperature changes. At the same time, the control board also makes a comprehensive judgment based on the data from the first and second temperature sensors, and controls the operation of the first fan 32 to achieve reasonable airflow and temperature regulation between the two workshops.

[0050] In an optional embodiment, there are multiple air supply components 3, and multiple air outlets of multiple air supply ducts 31 are distributed in the packaging workshop 2.

[0051] For example, the air supply ducts 31 of the five air supply components 3 are distributed in the packaging workshop 2. One air supply component 3 is installed in each of the four corners of the workshop, with its outlet facing inwards, allowing air to diffuse in all directions and ensuring even air coverage of the work area. All five first fans 32 are electrically connected to a control mainboard, which controls the activation of one or more of the five first fans 32.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not 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 heat utilization system applied to a dairy product production plant, the dairy product production plant including a pre-treatment plant and a packaging plant, characterized in that, The application relates to a ventilation mechanism for a packaging workshop. The ventilation mechanism comprises at least one ventilation assembly, each of which comprises a ventilation duct and a first fan installed on the ventilation duct, and the air inlet end of the ventilation duct is adapted to be installed on a pre-treatment workshop, and the air outlet end of the ventilation duct is adapted to be installed on the packaging workshop.

2. The waste heat utilization system according to claim 1, characterized by The ventilation mechanism further comprises a control mainboard and a first temperature sensor, the first temperature sensor is installed on the packaging workshop, and the first fan and the first temperature sensor are electrically connected with the control mainboard.

3. The waste heat utilization system according to claim 2, characterized by The control mainboard is configured to start the first fan when the temperature value of the first temperature sensor is less than a first target temperature value, wherein the first target temperature value corresponds to the packaging workshop.

4. The waste heat utilization system according to claim 2, characterized by The ventilation mechanism further comprises a second temperature sensor, the second temperature sensor is installed on the pre-treatment workshop, and the second temperature sensor is electrically connected with the control mainboard. The control mainboard is configured to start the first fan when the temperature value of the first temperature sensor is less than a first target temperature value, and the temperature value of the second temperature sensor is greater than the temperature value of the first temperature sensor.

5. The waste heat utilization system according to claim 4, characterized by The pre-treatment workshop is provided with an exhaust fan, the exhaust fan is electrically connected with the control mainboard, and the control mainboard is further configured to start the exhaust fan when the temperature value of the second temperature sensor is greater than a second target temperature value, wherein the second target temperature value corresponds to the pre-treatment workshop.

6. The waste heat utilization system according to any one of claims 1 to 5, characterized in that, The number of the ventilation assemblies is plural, and the air outlet ends of the ventilation ducts are dispersedly arranged in the packaging workshop.

7. The waste heat utilization system according to any one of claims 1 to 5, characterized in that, The first fan is an axial fan.

8. The waste heat utilization system according to any one of claims 1 to 5, characterized in that, The pre-treatment workshop is correspondingly provided with a first air conditioning unit, the air outlet side of the first air conditioning unit is communicated with the pre-treatment workshop through a first pipeline, and the first pipeline is provided with a first fireproof valve.

9. The waste heat utilization system according to any one of claims 1 to 5, characterized by The packaging workshop is correspondingly provided with a second air conditioning unit, the air outlet side of the second air conditioning unit is communicated with the pre-treatment workshop through a second pipeline, and the second pipeline is provided with a second fireproof valve.

10. The waste heat utilization system according to any one of claims 1 to 5, characterized by The ventilation assembly further comprises a filter screen, and the filter screen is installed in the ventilation duct.

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