阅读说明：本技术 一种新风加热加湿与排气除杂一体化方法 (Integrated method for heating and humidifying fresh air and removing impurities through exhaust ) 是由 汤石生 叶开愚 陈煜龙 涂桢楷 胡光华 曾小辉 张金齐 易磊 黄隆胜 龚丽 于 2021-05-24 设计创作，主要内容包括：本发明公开一种新风加热加湿与排气除杂一体化方法,该方法包括以下步骤：将排气通入除杂室中,排气由除杂室的排气进口吹向内部设有新风通道的除杂墙；除杂墙限制排气的流动空间和流动方向,降低排气的流速,杂质在重力作用下沉降下来；与此同时,排气与除杂墙接触,热量从排气传递至除杂墙上,再从除杂墙传递至新风通道中的新风上；在换热的过程中,加湿机构的喷头在新风通道内对新风进行喷水加湿,增加新风的焓值,提高能量回收率；除杂后的排气通过回风通道汇入新风中,与新风一起通往干燥机的蒸发器处。本发明不仅能够在热量回收的同时进行除杂,尤其适用于稻谷干燥；而且在换热的过程中对新风加湿,具有较高的热量回收率。(The invention discloses a fresh air heating and humidifying and exhaust impurity removal integrated method, which comprises the following steps: introducing exhaust gas into an impurity removing chamber, and blowing the exhaust gas into an impurity removing wall internally provided with a fresh air channel through an exhaust inlet of the impurity removing chamber; the impurity removal wall limits the flow space and the flow direction of the exhaust gas, reduces the flow speed of the exhaust gas, and the impurities sink and fall under the action of gravity; meanwhile, the exhaust gas is contacted with the impurity removal wall, and heat is transferred to the impurity removal wall from the exhaust gas and then transferred to the fresh air in the fresh air channel from the impurity removal wall; in the heat exchange process, a spray head of the humidifying mechanism sprays water to humidify the fresh air in the fresh air channel, so that the enthalpy value of the fresh air is increased, and the energy recovery rate is improved; the exhaust air after impurity removal is gathered into the fresh air through the return air channel and is led to the evaporator of the dryer together with the fresh air. The invention can not only recover heat and remove impurities, but also is especially suitable for drying rice; and the fresh air is humidified in the heat exchange process, so that the heat recovery rate is high.)

1. A fresh air heating and humidifying and exhaust impurity removal integrated method is characterized by comprising the following steps:

introducing exhaust gas into an impurity removing chamber, and blowing the exhaust gas into an impurity removing wall internally provided with a fresh air channel through an exhaust inlet of the impurity removing chamber;

the impurity removal wall limits the flow space and the flow direction of the exhaust gas, reduces the flow speed of the exhaust gas, and the impurities sink and fall under the action of gravity; meanwhile, the exhaust gas is contacted with the impurity removal wall, and heat is transferred to the impurity removal wall from the exhaust gas and then transferred to the fresh air in the fresh air channel from the impurity removal wall;

in the heat exchange process, a spray head of the humidifying mechanism sprays water to humidify the fresh air in the fresh air channel, so that the enthalpy value of the fresh air is increased.

2. The integrated fresh air heating and humidifying and exhaust and impurity removal method as claimed in claim 1, wherein the exhaust gas after impurity removal is collected into fresh air through a return air channel and led to an evaporator of a dryer together with the fresh air after heat acquisition.

3. The integrated method of fresh air heating humidification and exhaust impurity removal as claimed in claim 1, wherein an impurity removal wall is arranged in the impurity removal chamber, a fresh air channel is arranged in the impurity removal wall, fresh air is introduced into the fresh air channel, and the fresh air is humidified by a spray head arranged in the fresh air channel; the trash wall is erected in front of the exhaust inlet of the trash chamber.

4. The integrated fresh air heating, humidifying, exhausting and impurity removing method according to claim 3, wherein the fresh air channel is divided into a main channel and branch channels, and the branch channels are arranged in the impurity removing walls, so that the number of the branch channels is the same as that of the impurity removing walls;

two main channels are provided and a subchannel is connected between the two main channels.

5. The integrated fresh air heating, humidifying, exhausting and impurity removing method according to claim 4, wherein the impurity removing chamber is divided into an inner wall and an outer wall, two inner walls are arranged, and the two inner walls are respectively arranged at two ends of the impurity removing wall;

the space between the inner wall and the outer wall constitutes the main passage.

6. The integrated method of fresh air heating and humidifying and exhaust and impurity removal as claimed in claim 1, wherein after the exhaust is subjected to impurity removal, the exhaust is gathered into fresh air through a return air channel arranged behind an impurity removal wall, and the fresh air are led to an evaporator of a dryer together, so that the evaporation temperature of the evaporator is increased.

7. The integrated fresh air heating, humidifying, exhausting and impurity removing method as claimed in claim 4, wherein the impurity of the return air in the return air channel is removed by a filter screen impurity removing element.

8. The integrated fresh air heating and humidifying and exhaust impurity removing method as claimed in claim 1, wherein an exhaust inlet and an exhaust outlet of the impurity removing chamber are respectively disposed on two opposite side walls, and an impurity removing wall is disposed between the exhaust inlet and the exhaust outlet.

9. The integrated fresh air heating and humidifying and exhaust impurity removal method as claimed in claim 8, wherein at least two impurity removal walls are arranged between the exhaust inlet and the exhaust outlet; wherein, the bottom of the impurity removing wall close to the exhaust inlet is fixed on the bottom surface of the impurity removing chamber; the top of the impurity removing wall close to the exhaust outlet is fixed on the top surface of the impurity removing chamber.

10. The integrated fresh air heating and humidifying and exhaust impurity removal method as claimed in claim 9, wherein a return air channel is arranged between two adjacent impurity removal walls along the flow direction of exhaust air.

Technical Field

The invention relates to an exhaust heat recovery method of a dryer, in particular to a fresh air heating and humidifying and exhaust impurity removal integrated method.

Background

In modern agricultural mechanized production, grain is dried by drying equipment after being harvested for subsequent processing or long-term storage. The existing drying equipment mostly adopts a heat pump dryer, because the efficiency of the heat pump dryer is related to the ambient temperature, that is, the heating efficiency and the drying effect are reduced along with the reduction of the ambient temperature, when the ambient temperature is lower than 10 ℃, the evaporation temperature of a heat pump refrigerating system is generally lower than 0 ℃, the frosting phenomenon can occur on an evaporator, the heat exchange and heating efficiency is reduced, the drying effect is not good, and therefore, the heat pump dryer generally has the problem of poor use effect in autumn and winter.

Because the exhaust temperature of grain drying is generally higher than the temperature of ambient air, utilize exhaust and new trend to carry out the heat exchange, can preheat the new trend, when the new trend heat is used for being absorbed by the heat pump evaporator, can improve the efficiency of heating, can improve equipment's drying capacity when the new trend is used for the material drying.

However, in the existing drying exhaust heat exchange, the purpose is mainly to use fresh air for drying materials, the temperature of the fresh air is usually only increased without changing absolute humidity, the temperature of the fresh air is very easy to approach the exhaust temperature, the temperature of exhaust is not reduced much due to moisture separation, the heat regeneration efficiency is about 30%, the rest heat is exhausted to the environment, and the heat recovery rate is low.

In addition, in the drying work of grain type grains, the drying exhaust gas contains impurity particles or straws with larger volume, the heat exchange area of the heat pump heat exchanger is large, the fin spacing is small, large particle impurities easily block the heat exchanger, and the large particle impurities can be recycled only through impurity removal treatment, so that the existing heat recovery method is not suitable for heat recovery of the drying exhaust gas of the grain type grains, particularly for drying rice.

Disclosure of Invention

The invention aims to overcome the existing problems and provides a fresh air heating and humidifying and exhaust impurity removal integrated method, which can not only recover heat and remove impurities at the same time, but also is particularly suitable for drying rice; and the fresh air is humidified in the heat exchange process, so that the heat recovery rate is high.

The purpose of the invention is realized by the following technical scheme:

a fresh air heating and humidifying and exhaust impurity removal integrated method comprises the following steps:

introducing exhaust gas into an impurity removing chamber, and blowing the exhaust gas into an impurity removing wall internally provided with a fresh air channel through an exhaust inlet of the impurity removing chamber;

the impurity removal wall limits the flow space and the flow direction of the exhaust gas, reduces the flow speed of the exhaust gas, and the impurities sink and fall under the action of gravity; meanwhile, the exhaust gas is contacted with the impurity removal wall, and heat is transferred to the impurity removal wall from the exhaust gas and then transferred to the fresh air in the fresh air channel from the impurity removal wall;

in the heat exchange process, a spray head of the humidifying mechanism sprays water to humidify the fresh air in the fresh air channel, so that the enthalpy value of the fresh air is increased.

In a preferred embodiment of the present invention, the exhaust air after impurity removal is collected into the fresh air through the return air channel, and is led to the evaporator of the dryer together with the fresh air after heat extraction. Therefore, the evaporator can be defrosted or not frosted, and the refrigeration efficiency is effectively improved, so that the problem that the heat pump dryer has poor use effect in autumn and winter is solved. In addition, exhaust gas after impurity removal is converged into fresh air after heat exchange, and after the impurity content is reduced through neutralization, the exhaust gas and the fresh air are led into an evaporator of a dryer together, and the air conditioner has the advantages of high return air cleanliness, large air volume, small occupied space and the like.

According to a preferred scheme of the invention, an impurity removing wall is arranged in an impurity removing chamber, a fresh air channel is arranged in the impurity removing wall, fresh air is introduced into the fresh air channel, and the fresh air is humidified by a spray head arranged in the fresh air channel; the trash wall is erected in front of the exhaust inlet of the trash chamber.

Preferably, the fresh air channel is divided into a main channel and branch channels, and the branch channels are arranged in the impurity removing walls, so that the number of the branch channels is the same as that of the impurity removing walls;

two main channels are provided and a subchannel is connected between the two main channels.

Preferably, the impurity removing chamber is divided into an inner wall and an outer wall, two inner walls are arranged, and the two inner walls are respectively arranged at two ends of the impurity removing wall;

a main channel is formed in the space between the inner wall and the outer wall; the impurity removing wall and the inner wall are made of heat conducting materials. Like this, encircle the main entrance outside exhausting in the edulcoration room, including set up the subchannel in the edulcoration wall, be equivalent to whole new trend passageway and surround the exhaust in three direction to carry out the heat transfer simultaneously in a plurality of positions of edulcoration room, be favorable to improving heat exchange efficiency.

In a preferred embodiment of the present invention, after the exhaust gas is purified, the exhaust gas is collected into the fresh air through the return air channel arranged behind the impurity removing wall, and the fresh air are led to the evaporator of the dryer together, so as to increase the evaporation temperature of the evaporator.

Preferably, the return air in the return air channel is subjected to impurity removal through a filter screen impurity removal element.

In a preferred embodiment of the present invention, the exhaust gas inlet and the exhaust gas outlet of the trash chamber are provided on two opposite side walls, respectively, and the trash wall is disposed between the exhaust gas inlet and the exhaust gas outlet.

Preferably, at least two trash walls are arranged between the exhaust inlet and the exhaust outlet; wherein, the bottom of the impurity removing wall close to the exhaust inlet is fixed on the bottom surface of the impurity removing chamber; the top of the impurity removing wall close to the exhaust outlet is fixed on the top surface of the impurity removing chamber. This allows a curved exhaust path to be constructed, further reducing the exhaust gas impurity rate.

Further, along the exhaust flow direction, set up the return air passageway between two adjacent trash wall.

According to a preferred scheme of the invention, a fresh air fan is arranged in a working area of the dryer, and the fresh air fan sends fresh air to the working area of the dryer; the working area of the dryer is an area where the air at the outlet of the fresh air fan is utilized by a heating device or a cooling device of the dryer.

In a preferred embodiment of the present invention, the water in the water storage tank is delivered to the spray head through a water delivery pipe, and the opening and closing of the water delivery pipe is controlled through a valve.

Compared with the prior art, the invention has the following beneficial effects:

1. the fresh air channel is arranged in the impurity removing wall, exhaust air is in contact with the impurity removing wall in the impurity removing process, and heat of the exhaust air is transferred to the impurity removing wall and then transferred to the fresh air in the fresh air channel from the impurity removing wall, so that heat recovery is realized while impurity removal is carried out, and the novel air channel is particularly suitable for drying rice.

2. Through setting up new trend passageway in the edulcoration wall, have advantages such as heat transfer area is big, heat exchange efficiency height.

3. In the heat exchange process, the spray head of the humidifying mechanism sprays water to the fresh air, the humidity of the fresh air is improved, the exhausted heat is absorbed through water evaporation, the temperature rise of the fresh air is reduced, the latent heat of the fresh air is improved while the sensible heat of the fresh air is improved, the enthalpy value of the fresh air is further increased, and the heat recovery rate is greatly improved.

4. Different from the existing fresh air after heat exchange (because of the need of cyclic drying, the existing fresh air can not be humidified absolutely), the invention adopts the reverse thinking to humidify the fresh air, and the humidified and enthalpy-increased fresh air can be led to the evaporator of the dryer to defrost or prevent the evaporator from frosting, thereby effectively improving the refrigeration efficiency and solving the problem that the heat pump dryer has poor use effect in autumn and winter.

Drawings

FIG. 1 is a schematic diagram of a working flow of the integrated method of fresh air heating and humidifying and exhaust impurity removal.

FIG. 2 is a sectional side view of the structure of the integrated method of heating and humidifying fresh air and removing impurities from exhaust air in the present invention.

FIG. 3 is a top sectional view of the structure of the integrated method of heating and humidifying fresh air and removing impurities by exhaust gas in the present invention.

Detailed Description

In order to make those skilled in the art understand the technical solutions of the present invention well, the following description of the present invention is provided with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Referring to fig. 1 to 3, the integrated method of fresh air heating, humidifying, exhausting and impurity removing in the embodiment includes the following steps:

the exhaust gas is introduced into the impurity removing chamber 1 and blown to the impurity removing wall 2 provided with a fresh air channel 3 from the exhaust inlet 1-1 of the impurity removing chamber 1.

The impurity removal wall 2 limits the flow space and the flow direction of the exhaust gas, reduces the flow speed of the exhaust gas, and the impurities sink and fall under the action of gravity; meanwhile, the exhaust gas contacts with the impurity removing wall 2, and heat is transferred to the impurity removing wall 2 from the exhaust gas and then transferred to the fresh air in the fresh air channel 3 from the impurity removing wall 2.

In the process of heat transfer, the shower nozzle 4 of humidification mechanism carries out the water spray humidification to the new trend in new trend passageway 3, improves the humidity of new trend, absorbs carminative heat through the evaporation of water, reduces the new trend temperature rise, improves the latent heat of new trend when improving the sensible heat of new trend, further increases the enthalpy value of new trend, effectively improves heat recovery rate. Wherein, the calculation formula of the enthalpy is as follows: i ═ 1.01t +2500d +1.84d ═ t; t is the temperature; d is the moisture content (amount of water vapor), and when the temperature is constant, the water evaporates absorbing a large amount of heat. In a preferred embodiment of the present invention, the exhaust air after impurity removal is collected into the fresh air through the return air channel, and is led to the evaporator of the dryer together with the fresh air after heat extraction. Therefore, the evaporator can be defrosted or not frosted, and the refrigeration efficiency is effectively improved, so that the problem that the heat pump dryer has poor use effect in autumn and winter is solved. In addition, exhaust gas after impurity removal is converged into fresh air after heat exchange, and after the impurity content is reduced through neutralization, the exhaust gas and the fresh air are led into an evaporator of a dryer together, and the air conditioner has the advantages of high return air cleanliness, large air volume, small occupied space and the like.

Referring to fig. 2-3, an impurity removing wall 2 is arranged in an impurity removing chamber 1, a fresh air channel 3 is arranged in the impurity removing wall 2, fresh air is introduced into the fresh air channel 3, and the fresh air is humidified by a spray head 4 arranged in the fresh air channel 3; the trash wall 2 is erected in front of the exhaust gas inlet 1-1 of the trash chamber 1.

Further, the fresh air channel 3 is divided into a main channel and branch channels, and the branch channels are arranged in the impurity removing wall 2, so that the number of the branch channels is the same as that of the impurity removing wall 2; two main channels are provided and a subchannel is connected between the two main channels.

Preferably, the trash chamber 1 is divided into an inner wall 6 and an outer wall 7, two inner walls 6 are provided, and the two inner walls 6 are respectively placed at both ends of the trash wall 2; the space between the inner wall 6 and the outer wall 7 constitutes a main channel; the decontaminating wall 2 and the inner wall 6 are made of heat conducting material. Like this, encircle the main entrance outside exhaust in edulcoration room 1, including the subchannel of setting in edulcoration wall 2, be equivalent to whole new trend passageway 3 and surround the exhaust in three direction to carry out the heat transfer simultaneously in a plurality of positions of edulcoration room 1, be favorable to improving heat exchange efficiency.

After the exhaust is purified, the exhaust air is gathered into the fresh air through an air return channel arranged behind the impurity removing wall 2, and the fresh air are led into an evaporator of the dryer together, so that the evaporation temperature of the evaporator is improved.

Further, the return air in the return air channel is subjected to impurity removal through a filter screen impurity removal element 8; specifically, the filter screen impurity removing element 8 may be a filter device capable of filtering particles visible to naked eyes such as dust in the prior art.

Referring to fig. 2 to 3, an exhaust inlet 1-1 and an exhaust outlet 1-2 of the trash chamber 1 are respectively provided on two opposite sidewalls, and a trash wall 2 is disposed between the exhaust inlet 1-1 and the exhaust outlet 1-2.

Further, at least two impurity removing walls 2 are arranged between the exhaust inlet 1-1 and the exhaust outlet 1-2; wherein, the bottom of the impurity removing wall 2 close to the exhaust inlet 1-1 is fixed on the bottom surface of the impurity removing chamber 1; the top of the trash wall 2 near the exhaust outlet 1-2 is fixed on the top surface of the trash chamber 1. This allows a curved exhaust path to be constructed, further reducing the exhaust gas impurity rate.

Further, along the flow direction of the exhaust gas, a return air passage is provided between the adjacent two trash walls 2.

Referring to fig. 2-3, a fresh air fan 5 is arranged in the working area of the dryer, and the fresh air fan 5 sends fresh air into the working area of the dryer; the working area of the dryer is an area where the air at the outlet of the fresh air fan 5 is utilized by a heating device or a cooling device of the dryer. Specifically, new trend fan 5 comprises the inside fan of desiccator, can not set up the fan alone like this, reduces the normal cost of equipment.

Specifically, the water in the water storage tank is conveyed to the spray head 4 through the water conveying pipe, and the opening and closing of the water conveying pipe are controlled through a valve.

Referring to fig. 2 to 3, the trash module further includes a water trash removing member absorbing the trash of the exhaust gas by water, the water trash removing member being disposed between adjacent two trash walls 2. In this way, the water stripping elements can filter out fine dust and particles that have not yet been deposited when the exhaust gas flows between two adjacent stripping walls 2.

The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.