Waste gas waste heat recovery drying line

Abstract

The utility model discloses a waste gas waste heat recovery drying line which comprises drying equipment, dust removal equipment and recovery equipment, the drying equipment is used for drying crops and generating drying waste gas, the dust removal equipment comprises an air guide pipe, a dust collection chamber and a gas collection and dust removal device, one end of the air guide pipe is communicated with the drying equipment, and the other end of the air guide pipe is communicated with the dust collection chamber; the gas-collecting and dust-removing device is arranged in the dust collecting chamber; the recovery equipment comprises a recovery air supply pipe and a flow guide fan, one end of the recovery air supply pipe penetrates through the dust collection chamber and is communicated with the gas collection and dust removal device, the other end of the recovery air supply pipe is communicated with the drying equipment, and the flow guide fan is arranged in the recovery air supply pipe and is used for sucking drying waste gas. The gas collection and dust removal device can remove impurities in the drying waste gas, the drying waste gas after impurity removal flows back into the drying equipment along the recycling air supply pipe to dry crops, recycling of waste heat of the drying waste gas is achieved, loss of heat carried in the drying waste gas is effectively prevented, and the heat energy utilization rate and the drying efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the crop drying technical field, concretely relates to a waste heat recovery drying line. BACKGROUND

[0002] In the process of grain production and processing, the harvested rice, wheat, corn and other grain products need to be dried in time to reduce the moisture content, prevent mildew and germination, and ensure the quality of grain storage and processing. However, in the process of drying grains, the drying heat cannot be completely absorbed by the grains, resulting in the loss of part of the heat carried by the waste gas during the exhaust of the waste gas generated during drying, large loss of drying heat, and reduced heat energy utilization rate. SUMMARY

[0003] In view of the above defects or deficiencies, the utility model provides a waste heat recovery drying line, aiming at solving the technical problem of heat loss carried in the drying waste gas and reducing the heat energy utilization rate.

[0004] In order to achieve the above purpose, the utility model provides a waste heat recovery drying line, which comprises:

[0005] Drying equipment for drying crops and generating drying waste gas;

[0006] Dust removal equipment, including air duct, dust collection chamber and gas collection and dust removal device, one end of the air duct is communicated with the drying equipment, the other end of the air duct is communicated with the dust collection chamber, and the gas collection and dust removal device is arranged in the dust collection chamber;

[0007] Recovery equipment, including recovery air supply pipe and air guide fan, one end of the recovery air supply pipe passes through the dust collection chamber and is communicated with the gas collection and dust removal device, the other end of the recovery air supply pipe is communicated with the drying equipment, and the air guide fan is arranged in the recovery air supply pipe and used for sucking the drying waste gas.

[0008] In the embodiment of the utility model, the drying equipment includes a heat supply furnace, a heat supply air pipe and a dryer, the heat supply furnace has an air inlet and an air outlet, one end of the recovery air supply pipe away from the gas collection and dust removal device is communicated with the air inlet, one end of the heat supply air pipe is communicated with the air outlet, the other end of the heat supply air pipe is communicated with the dryer, the dryer is used for placing crops and generating drying waste gas, and one end of the air duct away from the dust collection chamber is communicated with the dryer.

[0009] In the embodiment of the utility model, the number of drying machines is set to be multiple, multiple drying machines are arranged between the dust collecting chamber and the heat supply stove along the extension direction of the dust collecting chamber, the heat supply air pipe comprises a heat supply main pipe and multiple heat supply branch pipes, one end of the heat supply main pipe is communicated with the air outlet, the other end of the heat supply main pipe is branched and communicated with the multiple heat supply branch pipes, the number of the heat supply branch pipes is consistent with the number of the drying machines and is communicated one by one, and multiple gas collecting openings are arranged on each drying machine, the number of the air guide pipe is consistent with the number of the gas collecting openings and is communicated one by one.

[0010] In the embodiment of the utility model, the first temperature and humidity sensor and the second temperature and humidity sensor are arranged on the drying machine, the first temperature and humidity sensor is arranged at one end of the drying machine communicated with the heat supply air pipe, and the second temperature and humidity sensor is arranged at one end of the drying machine communicated with the air guide pipe.

[0011] In the embodiment of the utility model, the heat supply stove is set to be a biomass pellet fuel stove, and the gas collecting and dust removing device is set to be a bag type dust removing device.

[0012] In the embodiment of the utility model, the air recovery pipe is provided with an air supplementing opening.

[0013] In the embodiment of the utility model, the air recovery pipe comprises a first air supply section and a second air supply section communicated with the first air supply section, the first air supply section is communicated with the gas collecting and dust removing device, the second air supply section is communicated with the drying equipment, the air guide fan is arranged in the first air supply section, and the air supplementing opening is arranged on one end of the second air supply section away from the first air supply section.

[0014] In the embodiment of the utility model, the third temperature and humidity sensor and the air flow meter are arranged on the first air supply section, and the third temperature and humidity sensor and the air flow meter are located on the side of the air guide fan facing the second air supply section.

[0015] In the embodiment of the utility model, the dust removing equipment further comprises an exhaust pipe and an exhaust dust removing device, one end of the exhaust pipe is communicated with the dust collecting chamber, and the exhaust dust removing device is communicated with the other end of the exhaust pipe and is provided with an exhaust opening.

[0016] In the embodiment of the utility model, the dust removing equipment further comprises a fourth temperature and humidity sensor, and the fourth temperature and humidity sensor is arranged in the dust collecting chamber.

[0017] In the embodiment of the utility model, the dust removing equipment further comprises a gas collecting heat preservation pipe sleeve and a gas collecting heat preservation plate, the gas collecting heat preservation pipe sleeve is arranged on the air guide pipe, and the gas collecting heat preservation plate is arranged on the inner wall of the dust collecting chamber.

[0018] In the embodiment of the utility model, the recovery equipment further comprises a recovery heat preservation pipe sleeve, and the recovery heat preservation pipe sleeve is arranged on the air recovery pipe.

[0019] In the embodiment of the utility model, the recovery equipment further comprises a dehumidifier, and the dehumidifier is arranged in the air recovery pipe.

[0020] By the technical scheme, the waste gas heat recovery drying line has the following beneficial effects:

[0021] In the technical scheme, the drying equipment can dry crops placed in the drying equipment to reduce the water content of the crops, prevent the crops from mildewing or germinating, the two ends of the air guide pipe are communicated with the drying equipment and the dust collecting chamber respectively, so that the drying waste gas generated in the drying process of the drying equipment can flow into the dust collecting chamber along the air guide pipe, the dust collecting chamber is used for collecting the drying waste gas, the drying waste gas is effectively prevented from escaping to the outside of the dust collecting chamber, and the gas collecting and dust removing device is arranged in the dust collecting chamber, the drying waste gas can be filtered and dust removed by the gas collecting and dust removing device, so that impurities in the drying waste gas are removed, the two ends of the recovery air supply pipe are communicated with the gas collecting and dust removing device and the drying equipment respectively, the drying waste gas after impurities removal is sucked by the air guide fan, so that the drying waste gas after impurities removal flows back to the drying equipment along the recovery air supply pipe and acts on the crops together with the drying equipment to dry the crops, the recycling and utilization of the waste gas heat is realized, the loss of heat carried by the drying waste gas is effectively prevented, the heat energy utilization rate and the drying efficiency are improved, the drying waste gas after impurities removal can be heated by the drying equipment to dry the crops, the drying waste gas carries heat and warms up quickly, the fuel of the drying equipment is saved, the energy consumption is reduced, in addition, the drying waste gas can circulate between the drying equipment, the dust removing equipment and the recovery equipment, the dust, heat and moisture in the dust collecting chamber are prevented, the drying is energy-saving and environmentally friendly.

[0022] Other features and advantages of the embodiments will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments and serve to explain the embodiments, and do not limit the embodiments. For those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor. In the drawings:

[0024] Figure 1 is a structural schematic view of a waste gas heat recovery drying line according to an embodiment of the present application;

[0025] Figure 2 is a structural schematic view of a drying equipment in a waste gas heat recovery drying line according to an embodiment of the present application;

[0026] Figure 3 is a structural schematic view of a dust removing equipment in a waste gas heat recovery drying line according to an embodiment of the present application;

[0027] Figure 4is a structural schematic view of a recovery equipment in a waste heat recovery drying line according to an embodiment of the present application.

[0028] Figure 5 is a structural block diagram of a waste heat recovery drying line according to an embodiment of the present application.

[0029] Explanation of reference signs

[0030] 10 drying equipment 23 gas collecting and dust removing device

[0031] 11 heat supply furnace 24 exhaust pipe

[0032] 111 air inlet 25 exhaust gas dust removal device

[0033] 112 air outlet 251 exhaust port

[0034] 12 heat supply air pipe 30 recovery equipment

[0035] 121 heat supply main pipe 31 recovery air supply pipe

[0036] 122 heat supply branch pipe 311 air supplement port

[0037] 13 dryer 312 first air supply section

[0038] 131 gas collecting port 313 second air supply section

[0039] 132 first temperature and humidity sensor 314 third temperature and humidity sensor

[0040] 133 second temperature and humidity sensor 315 air flow meter

[0041] 20 dust removal equipment 32 flow guide fan

[0042] 21 air guide pipe 40 controller

[0043] 22 dust collecting chamber 41 display device

[0044] 221 fourth temperature and humidity sensor 42 sound and light indicator DETAILED DESCRIPTION

[0045] The specific embodiments described hereinbelow with reference to the accompanying drawings are intended to be illustrative only and are not intended to limit the present application.

[0046] The waste heat recovery drying line of the present application is described below with reference to the accompanying drawings.

[0047] As Figures 1 to 4The utility model provides a kind of waste heat recovery drying line, waste heat recovery drying line includes drying equipment 10, dust removal equipment 20 and recovery equipment 30, drying equipment 10 is used to dry crops and generates drying waste gas, dust removal equipment 20 includes air duct 21, dust collection chamber 22 and gas collection dust removal device 23, one end of air duct 21 is communicated with drying equipment 10, the other end of air duct 21 is communicated with dust collection chamber 22, gas collection dust removal device 23 is located in dust collection chamber 22;Recovery equipment 30 includes recovery air supply pipe 31 and guide fan 32, one end of recovery air supply pipe 31 is set through dust collection chamber 22 and is communicated with gas collection dust removal device 23, the other end of recovery air supply pipe 31 is communicated with drying equipment 10, guide fan 32 is located in recovery air supply pipe 31 and is used to suck drying waste gas.

[0048] It should be noted that the waste heat recovery drying line of the utility model embodiment is used for drying crops, and the crops can be rice, wheat, corn and other grain products. The waste heat recovery drying line of the utility model does not limit the type of crops to be dried.

[0049] Specifically, the drying equipment 10 can dry the crops placed in the drying equipment 10 to reduce the moisture content of the crops and prevent the crops from mildewing or germinating. The two ends of the air duct 21 are respectively communicated with the drying equipment 10 and the dust collection chamber 22, so that the drying waste gas generated by the drying equipment 10 during drying can flow into the dust collection chamber 22 along the air duct 21. The dust collection chamber 22 is used to collect and concentrate the drying waste gas, effectively preventing the drying waste gas from escaping outside the dust collection chamber 22. The dust collection chamber 22 is provided with the gas collection dust removal device 23, which can filter and remove dust from the drying waste gas to remove impurities in the drying waste gas. The two ends of the recovery air supply pipe 31 are respectively communicated with the gas collection dust removal device 23 and the drying equipment 10. The guide fan 32 sucks the drying waste gas after impurity removal, so that the drying waste gas after impurity removal flows back to the drying equipment 10 along the recovery air supply pipe 31 and acts together with the drying equipment 10 to dry the crops. The recycling and utilization of the drying waste gas heat is realized, the loss of heat carried by the drying waste gas is effectively prevented, the heat energy utilization rate and the drying efficiency are improved, the drying equipment 10 can heat the drying waste gas after impurity removal for crop drying, the drying waste gas carries heat and warms up quickly, the fuel of the drying equipment 10 is saved, the energy consumption is reduced, and in addition, the drying waste gas can circulate between the drying equipment 10, the dust removal equipment 20 and the recovery equipment 30, preventing the accumulation of impurities, heat and moisture in the dust collection chamber 22, and achieving energy-saving and environment-friendly drying.

[0050] In the embodiment of the utility model, drying equipment 10 includes heat supply stove 11, heat supply air pipe 12 and drying machine 13, heat supply stove 11 has air inlet 111 and air outlet 112, the one end of recovery air supply pipe 31 away from gas collecting and dust removing device 23 is communicated with air inlet 111, one end of heat supply air pipe 12 is communicated with air outlet 112, the other end of heat supply air pipe 12 is communicated with drying machine 13, drying machine 13 is used to place crops and produce drying waste gas, the one end of air guide pipe 21 away from dust collecting chamber 22 is communicated with drying machine 13.

[0051] As Figure 1 And Figure 2 Indicated, gas collecting and dust removing device 23 is communicated with air inlet 111 of heat supply stove 11 through recovery air supply pipe 31, air outlet 112 of heat supply stove 11 is communicated with drying machine 13 through heat supply air pipe 12, drying machine 13 is communicated with dust collecting chamber 22 through air guide pipe 21, heat supply stove 11 is used to burn fuel to provide drying heat to drying gas, drying gas is transported to drying machine 13 along heat supply air pipe 12 to dry crops in drying machine 13 and produce drying waste gas, the drying waste gas produced in drying machine 13 flows into dust collecting chamber 22 along air guide pipe 21, gas collecting and dust removing device 23 in dust collecting chamber 22 filters and dedusts drying waste gas, so that the drying waste gas after impurity removal is backflowed to heat supply stove 11 under the suction of air guide fan 32, heat supply stove 11 heats the drying waste gas after impurity removal to make the drying waste gas circulating in drying machine 13 can dry crops, heat supply stove 11 heats drying waste gas to remove moisture in drying waste gas, realizes the recycling of drying waste gas, prevents the loss of heat carried in drying waste gas, and the drying waste gas has a fast heating rate, reduces the energy consumption of heat supply stove 11, and further, air guide fan 32 sucks the drying waste gas after impurity removal, so that the drying waste gas after impurity removal can be quickly backflowed to heat supply stove 11, further reduces heat loss, and prevents the dust pollution in dust collecting chamber 22 caused by the excessive accumulation of drying waste gas in dust collecting chamber 22, prevents the accumulation of impurities, heat and moisture in dust collecting chamber 22, and accelerates the circulation rate of drying waste gas.

[0052] Further, a first fan is arranged in the drying machine 13, the first fan is used for sucking the drying waste gas heated in the heat supply stove 11 and blowing the newly generated drying waste gas into the air guide pipe 21, the first fan and the air guide fan 32 jointly act to further accelerate the flow speed of the drying waste gas, greatly increase the drying air volume, and improve the drying rate.

[0053] In the embodiment of the utility model, the number of drying machines 13 is set to be multiple, multiple drying machines 13 are arranged between the dust collecting chamber 22 and the heat supply stove 11 along the extension direction of the dust collecting chamber 22, the heat supply air pipe 12 includes a heat supply main pipe 121 and multiple heat supply branch pipes 122, one end of the heat supply main pipe 121 is communicated with the air outlet 112, the other end of the heat supply main pipe 121 is branched and communicated with multiple heat supply branch pipes 122, the number of heat supply branch pipes 122 is consistent with the number of drying machines 13 and is communicated one by one, and multiple gas collecting openings 131 are arranged on each drying machine 13, the number of air guide pipes 21 is consistent with the number of gas collecting openings 131 and is communicated one by one.

[0054] As shown in Figure 1 and Figure 2 The heat supply main pipe 121 is communicated with multiple drying machines 13 one by one through multiple heat supply branch pipes 122, crops can be placed in each drying machine 13 to realize batch drying of crops, increase drying output, and multiple gas collecting openings 131 are arranged on each drying machine 13, each gas collecting opening 131 is communicated with the dust collecting chamber 22 through an air guide pipe 21, realizing rapid collection of drying waste gas and preventing high humidity drying waste gas from accumulating in the drying machine 13 to affect drying quality.

[0055] In the embodiment of the utility model, the heat supply stove 11 is set to be a biomass particle fuel stove, specifically, the heat supply stove 11 can adopt a biomass particle fuel stove in the prior art, the heat supply stove 11 can provide drying heat and heat drying waste gas by burning biomass fuel (Biomass Moulding Fuel, BMF), the biomass fuel is a granular fuel made by crushing, mixing, extruding and drying agricultural and forestry waste such as straw, rice husk and sugarcane residue, which is energy-saving and environment-friendly, reduces drying cost, and the heat supply stove 11 has fast heating speed, improves drying efficiency and drying quality, in addition, the heat supply stove 11 is less affected by environmental temperature, and drying is stable and reliable.

[0056] In the embodiment of the utility model, the gas collecting and dust removing device 23 is set to be a bag type dust removing device, specifically, the gas collecting and dust removing device 23 can adopt a bag type dust remover in the prior art, large particle impurities in drying waste gas can be settled in the dust collecting chamber 22, the gas collecting and dust removing device 23 removes small particle dust in drying waste gas, and improves the purification effect of drying waste gas.

[0057] In the embodiment of the utility model, as shown in Figure 1 and Figure 4As shown, the recovery air supply pipe 31 is provided with a make-up air opening 311, in the case that the drying waste gas circulation time is relatively long, resulting in increased humidity and the heating rate of the heating furnace 11 is significantly reduced, the make-up air opening 311 of the recovery air supply pipe 31 is opened to make the external fresh air flow into the recovery air supply pipe 31, and the external fresh air and the drying waste gas are mixed to reduce the humidity of the drying waste gas, thereby ensuring the drying quality and improving the drying waste gas circulation stability.

[0058] Further, the heating furnace 11 is provided with a second fan, which is used to suck the drying waste gas in the recovery air supply pipe 31 to heat the drying waste gas, and the first fan, the second fan and the flow guide fan 32 jointly act to further accelerate the flow speed of the drying waste gas, thereby improving the drying efficiency, and the second fan can also be used to suck the external fresh air at the make-up air opening 311, so that the external fresh air can be quickly supplemented into the recovery air supply pipe 31 and mixed with the drying waste gas, thereby improving the air making efficiency.

[0059] In the embodiment of the utility model, dust removal equipment 20 still includes exhaust pipe 24 and exhaust dust removal device 25, one end of exhaust pipe 24 communicates with dust collecting chamber 22, exhaust dust removal device 25 communicates with the other end of exhaust pipe 24 and is provided with exhaust port 251. Figure 1 And Figure 3 As shown, the dust collecting chamber 22 communicates with the exhaust dust removal device 25 through the exhaust pipe 24, and the exhaust dust removal device 25 is provided with the exhaust port 251, and in the case that the humidity of the drying waste gas is relatively high, the exhaust dust removal device 25 is opened to make the drying waste gas flow into the exhaust dust removal device 25 from the dust collecting chamber 22 along the exhaust pipe 24, and the exhaust dust removal device 25 removes dust and purifies the drying waste gas to make the drying waste gas reach the emission standard and be discharged from the exhaust port 251, so that the exhaust dust removal device 25 plays a role of removing dust and purifying the drying waste gas before exhaust, thereby greatly reducing the pollution caused by the drying waste gas emission to the external environment and improving the environmental protection of crop drying.

[0060] In the embodiment of the utility model, the recovery air supply pipe 31 includes a first air supply section 312 and a second air supply section 313 in communication with the first air supply section 312, the first air supply section 312 communicates with the gas collecting and dust removal device 23, the second air supply section 313 communicates with the drying equipment 10, the flow guide fan 32 is arranged in the first air supply section 312, and the make-up air opening 311 is arranged on the second air supply section 313 away from one end of the first air supply section 312.

[0061] As shown, Figure 1 And Figure 4As shown, the gas collecting and dust removing device 23, the first air supply section 312, the second air supply section 313 and the heat supply furnace 11 are sequentially communicated, the first air supply section 312 is provided with a flow guide fan 32, the flow guide fan 32 is arranged close to the gas collecting and dust removing device 23, so that the flow guide fan 32 can suck the drying waste gas after impurity removal by the gas collecting and dust removing device 23, the flow speed of the drying waste gas is accelerated, and the second air supply section 313 is provided with a supplementary air inlet 311 close to one end of the heat supply furnace 11, so that the second fan in the heat supply furnace 11 can quickly suck the external fresh air from the supplementary air inlet 311 into the heat supply furnace 11, the air supplementing speed is accelerated, and the drying waste gas dehumidification efficiency is improved.

[0062] In the embodiment of the utility model, the first and second temperature and humidity sensors 132 and 133 are arranged on the dryer 13, the first temperature and humidity sensor 132 is arranged at the end of the dryer 13 communicated with the heat supply air pipe 12, and the second temperature and humidity sensor 133 is arranged at the end of the dryer 13 communicated with the air guide pipe 21; the third temperature and humidity sensor 314 and the air flow meter 315 are arranged on the first air supply section 312, and the third temperature and humidity sensor 314 and the air flow meter 315 are located at the side of the flow guide fan 32 facing the second air supply section 313; the dust removal equipment 20 further comprises a fourth temperature and humidity sensor 221 arranged in the dust collecting chamber 22.

[0063] As shown in the drawings, Figures 1 to 4As shown, the end of the dryer 13 communicated with the heat supply pipe 12 is the air inlet end, the air inlet end of the dryer 13 is provided with a first temperature and humidity sensor 132 for detecting the temperature and humidity of the drying waste gas heated by the heating furnace 11, the end of the dryer 13 communicated with the air guide pipe 21 is the air outlet end, the air outlet end of the dryer 13 is provided with a second temperature and humidity sensor 133 for detecting the temperature and humidity of the drying waste gas after drying crops, the first air supply section 312 is provided with a third temperature and humidity sensor 314 for detecting the temperature and humidity of the drying waste gas after impurity removal, the dust collecting chamber 22 is provided with a fourth temperature and humidity sensor 221 for detecting the temperature and humidity of the drying waste gas in the dust collecting chamber 22, and when the first temperature and humidity sensor 132, the second temperature and humidity sensor 133, the third temperature and humidity sensor 314 or the fourth temperature and humidity sensor 221 detects that the temperature of the drying waste gas is low or the humidity is large, it is determined that the drying waste gas does not meet the recycling drying condition, and then the air supplement opening 311 is opened and the exhaust dust removal device 25 is started, so that the external fresh air is supplemented and the drying waste gas with large humidity is discharged, the external fresh air is mixed with the drying waste gas to reduce the humidity, the continuous recycling of the drying waste gas is realized, the drying temperature and humidity of crops are ensured to be suitable, and the heat consumption is reduced. Moreover, the first air supply section 312 is also provided with an air flow meter 315, the air flow meter 315 is used for detecting the flow and wind speed of the drying waste gas flowing through the first air supply section 312, so that when the flow of the drying waste gas is detected to be reduced or the wind speed is detected to be reduced, it is determined that the drying waste gas contains more impurities and the dust removal efficiency of the gas collecting and dust removal device 23 is reduced, and then the air supplement opening 311 is opened and the exhaust dust removal device 25 is started, so that the external fresh air is supplemented and the drying waste gas is purified and dusted, and the drying waste gas is discharged to the outside after meeting the emission standard, so that the drying is energy-saving and environmentally friendly.

[0064] Further, the temperature value detected by the third temperature and humidity sensor 314 is T1, the flow of the drying waste gas detected by the air flow meter 315 is Q, the temperature of the external environment is T2, and the energy recovered and utilized by the drying waste gas is ΔE, and ΔE=Q(T1-T2)ρ 空 C can be calculated, wherein ρ 空 C is the air density, and C is the air constant-pressure specific heat capacity, that is, the energy recovered and utilized by the drying waste gas can be determined according to the detection results of the third temperature and humidity sensor 314 and the air flow meter 315, and the system control accuracy is improved.

[0065] In the embodiment of the utility model, the waste heat recovery drying line further includes a controller 40, such as Figure 5As shown, the controller 40 is in communication connection with the first temperature and humidity sensor 132, the second temperature and humidity sensor 133, the third temperature and humidity sensor 314, the fourth temperature and humidity sensor 221, the anemometer 315, the flow guide fan 32 and the exhaust dust removal device 25 respectively, and the controller 40 is used to control the opening of the air supplementing port 311 and the opening of the exhaust dust removal device 25 when the anemometer 315 detects that the flow of the drying waste gas is lower than the preset flow, the anemometer 315 detects that the wind speed of the drying waste gas is lower than the preset wind speed, and the first temperature and humidity sensor 132, the second temperature and humidity sensor 133, the third temperature and humidity sensor 314 or the fourth temperature and humidity sensor 221 detects that the temperature of the drying waste gas is lower than the preset temperature and the humidity of the drying waste gas is higher than the preset humidity, so that the external fresh air is supplemented and the drying air after dust removal and purification is discharged, so that the flow, temperature and humidity of the drying waste gas in the waste heat recovery drying line are always balanced and continuously circulated, the waste heat in the drying waste gas is recycled and utilized, and the heat loss is reduced.

[0066] Further, the waste heat recovery drying line further comprises a display device 41 and an audible and light prompter 42, and the display device 41 and the audible and light prompter 42 are in communication connection with the controller 40 respectively, the controller 40 can send the detection results of the first temperature and humidity sensor 132, the second temperature and humidity sensor 133, the third temperature and humidity sensor 314, the fourth temperature and humidity sensor 221 and the anemometer 315 to the display device 41 and the audible and light prompter 42, so that the operator can monitor the temperature, humidity, flow and wind speed of the drying waste gas through the display device 41, and the audible and light prompter 42 can issue an audible and light prompt to remind the operator to open the air supplementing port 311, open the exhaust dust removal device 25 and clean the gas collecting and dust removing device 23 when the drying waste gas does not meet the circulating drying conditions, thereby improving the circulating stability and the drying quality.

[0067] In the embodiment of the utility model, dust removal equipment 20 still includes gas collecting and heat preserving pipe sleeve and gas collecting and heat preserving plate, gas collecting and heat preserving pipe sleeve is established in air guide pipe 21, gas collecting and heat preserving plate is established on the inner wall of dust collecting chamber 22, recovery equipment 30 still includes recovery heat preserving pipe sleeve, recovery heat preserving pipe sleeve is established on recovery air supply pipe 31. Specifically, gas collecting and heat preserving plate is arranged in dust collecting chamber 22, gas collecting and heat preserving pipe sleeve is sleeved on air guide pipe 21, and recovery heat preserving pipe sleeve is sleeved on recovery air supply pipe 31, so as to preserve the heat of drying waste gas, prevent the heat loss of drying waste gas and further improve the heat energy utilization rate.

[0068] Further, the recycling device 30 further comprises a dehumidifier arranged in the recycling air supply pipe 31. Specifically, the heat supply furnace 11 generates high-temperature flue gas by burning the biomass fuel, and the high-temperature flue gas is used to provide drying heat for the drying gas, so that the drying gas can dry the crops, and the drying gas forms drying waste gas after drying the crops, and the drying waste gas is circulated on the waste heat recycling drying line for multiple times, and the relative humidity of the drying waste gas is continuously increased and tends to be saturated, which causes the drying effect of the drying waste gas to be invalid, and by arranging the dehumidifier in the recycling air supply pipe 31, the dehumidifier can dehumidify the drying waste gas flowing through the recycling air supply pipe 31, thereby reducing the humidity of the drying waste gas and improving the drying rate.

[0069] In the description of the present application, it should be understood that the terms "first", "second" are for the purpose of description only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0070] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0071] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0072] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A waste heat recovery drying line, characterized in that, The waste heat recovery drying line comprises: a drying device (10) for drying crops and generating drying waste gas; a dust removal device (20) comprising a wind guide pipe (21), a dust collection chamber (22) and a gas collection and dust removal device (23), one end of the wind guide pipe (21) being in communication with the drying device (10), the other end of the wind guide pipe (21) being in communication with the dust collection chamber (22), and the gas collection and dust removal device (23) being arranged in the dust collection chamber (22); a recovery device (30) comprising a recovery air supply pipe (31) and a flow guide fan (32), one end of the recovery air supply pipe (31) being arranged through the dust collection chamber (22) and in communication with the gas collection and dust removal device (23), the other end of the recovery air supply pipe (31) being in communication with the drying device (10), and the flow guide fan (32) being arranged in the recovery air supply pipe (31) and used for sucking the drying waste gas.

2. The exhaust heat recovery drying line according to claim 1, characterized in that, The drying device (10) comprises a heat supply stove (11), a heat supply air pipe (12) and a dryer (13), the heat supply stove (11) having an air inlet (111) and an air outlet (112), the end of the recovery air supply pipe (31) away from the gas collection and dust removal device (23) being in communication with the air inlet (111), one end of the heat supply air pipe (12) being in communication with the air outlet (112), the other end of the heat supply air pipe (12) being in communication with the dryer (13), the dryer (13) being used for placing crops and generating drying waste gas, and the end of the wind guide pipe (21) away from the dust collection chamber (22) being in communication with the dryer (13).

3. The exhaust heat recovery drying line according to claim 2, characterized in that, The number of the dryers (13) is set to be multiple, the multiple dryers (13) being arranged in the dust collection chamber (22) and between the dust collection chamber (22) and the heat supply stove (11) in the extension direction of the dust collection chamber (22), the heat supply air pipe (12) comprising a heat supply main pipe (121) and multiple heat supply branch pipes (122), one end of the heat supply main pipe (121) being in communication with the air outlet (112), the other end of the heat supply main pipe (121) being branched to be in communication with the multiple heat supply branch pipes (122), the number of the heat supply branch pipes (122) being consistent with and corresponding to the number of the dryers (13), and multiple gas collection openings (131) being arranged on each of the dryers (13), the number of the wind guide pipes (21) being consistent with and corresponding to the number of the gas collection openings (131).

4. The exhaust heat recovery drying line according to claim 2, wherein First and second temperature and humidity sensors (132) and (133) are arranged on the dryers (13), the first temperature and humidity sensor (132) being arranged at the end of the dryer (13) in communication with the heat supply air pipe (12), and the second temperature and humidity sensor (133) being arranged at the end of the dryer (13) in communication with the wind guide pipe (21).

5. The exhaust heat recovery drying line according to claim 2, wherein The heat supply stove (11) is a biomass pellet fuel stove, and the gas collection and dust removal device (23) is a bag type dust removal device.

6. The exhaust heat recovery drying line according to claim 1, wherein An air supplement opening (311) is arranged on the recovery air supply pipe (31).

7. The exhaust heat recovery drying line according to claim 6, characterized in that, The recycling air supply pipe (31) comprises a first air supply section (312) and a second air supply section (313) in communication with the first air supply section (312), the first air supply section (312) is in communication with the air collecting and dust removing device (23), the second air supply section (313) is in communication with the drying equipment (10), the flow guide fan (32) is arranged in the first air supply section (312), and the air supplementing opening (311) is arranged on the second air supply section (313) away from the first air supply section (312).

8. The exhaust heat recovery drying line according to claim 7, characterized in that, The first air supply section (312) is provided with a third temperature and humidity sensor (314) and a wind meter (315), and the third temperature and humidity sensor (314) and the wind meter (315) are located on the side of the flow guide fan (32) facing the second air supply section (313).

9. The exhaust heat recovery drying line according to any one of claims 1 to 8, characterized in that, The dust removing equipment (20) further comprises an exhaust pipe (24) and an exhaust air dust removing device (25), one end of the exhaust pipe (24) is in communication with the dust collecting chamber (22), and the exhaust air dust removing device (25) is in communication with the other end of the exhaust pipe (24) and is provided with an exhaust port (251).

10. The exhaust heat recovery drying line according to any one of claims 1 to 8, characterized in that, The dust removing equipment (20) further comprises a fourth temperature and humidity sensor (221), and the fourth temperature and humidity sensor (221) is arranged in the dust collecting chamber (22); And / or, the dust removing equipment (20) further comprises an air collecting heat preservation pipe sleeve and an air collecting heat preservation plate, the air collecting heat preservation pipe sleeve is arranged on the air guide pipe (21), and the air collecting heat preservation plate is arranged on the inner wall of the dust collecting chamber (22); And / or, the recycling equipment (30) further comprises a recycling heat preservation pipe sleeve, and the recycling heat preservation pipe sleeve is arranged on the recycling air supply pipe (31); And / or, the recycling equipment (30) further comprises a dehumidifier, and the dehumidifier is arranged in the recycling air supply pipe (31).

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