CN112023632A

CN112023632A - Working method of agricultural waste gas circulating and purifying device

Info

Publication number: CN112023632A
Application number: CN202010897404.0A
Authority: CN
Inventors: 何跃芳; 黄奋华; 詹晨平
Original assignee: Hangzhou Kaibote Environmental Protection Technology Development Co ltd
Current assignee: Hangzhou Kaibote Environmental Protection Technology Development Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2020-12-04

Abstract

The invention relates to the technical field of agricultural waste gas, in particular to a working method of an agricultural waste gas circulating and purifying device, which comprises an air inlet pipeline fixedly arranged at the top of a greenhouse, an air outlet pipeline fixedly arranged at the lower side of the air inlet pipeline, air exhaust fans fixedly arranged in two circular openings, the installation directions of the two air exhaust fans are opposite, a liquid storage tank bent downwards is arranged at the middle section of the air outlet pipeline, a water inlet pipe and a water outlet pipe are fixedly connected with the water storage tank, one section of the water outlet pipe in the air inlet pipeline is set as a heat exchange assembly, a spraying assembly connected with the water outlet pipe is arranged at the upper side of the liquid storage tank, and a condensing assembly communicated with the. The invention can purify and discharge the waste gas generated in the greenhouse, simultaneously introduce fresh air into the greenhouse to ensure oxygen supply, collect ammonia gas in the waste gas to prepare ammonia water which is used as fertilizer, and the introduced fresh air also has heat, thereby avoiding the temperature reduction in the greenhouse.

Description

Working method of agricultural waste gas circulating and purifying device

Technical Field

The invention relates to the technical field of agricultural waste gas, in particular to a working method of an agricultural waste gas circulating and purifying device.

Background

Agricultural waste gas refers to waste gas generated during agricultural work, and if the waste gas is directly discharged, air is always polluted; the greenhouse is originally special equipment for vegetable production, the application of the greenhouse is more extensive along with the development of production, and the greenhouse has more excellent effects of agricultural planting and cultivation, but the existing greenhouse often generates waste gas in the using process, the main component of the waste gas is ammonia gas, and the ammonia gas is often concentrated at the top of the greenhouse because the mass of the ammonia gas is less than that of air; the ammonia concentration produces great harm easily when too high, current mode of purifying the ammonia of ventilating, but this kind of mode makes the direct emission of ammonia in the air, polluted environment, and the outside air enters simultaneously and can lead to the inside temperature reduction of big-arch shelter, influences the big-arch shelter effect, and the ammonia dissolves in water and can become the aqueous ammonia, can retrieve as fertilizer.

Chinese patent application No.: CN 201710976725.8; the utility model discloses a big-arch shelter is bred to environment-friendly live poultry, includes the big-arch shelter, first gas absorption port has been seted up to the left lower extreme of big-arch shelter, and the left end intercommunication of first gas absorption port has the rose box, the filter screen is installed to the inner wall of rose box, and the rose box has the ultraviolet ray treatment case through fan intercommunication, is equipped with the ultraviolet germicidal lamp in the ultraviolet ray treatment case, and the bottom of ultraviolet ray treatment case is equipped with temperature regulator, and the left end of ultraviolet ray treatment case is equipped with the exhaust box, the left end of exhaust box is equipped with the inlet box, and the upper right corner of the inner wall of inlet box is equipped with cooling device, and the inlet box is equipped with heat source exchange device with the junction of exhaust box, and the top intercommunication of inlet box has the admission line, and big-arch.

This solution has the following drawbacks:

1. the device has a purification effect on waste gas, but cannot recover ammonia gas;

2. the device has the advantages of low heat exchange mode efficiency and high cost, and is not suitable for greenhouses.

Disclosure of Invention

The invention aims to provide an agricultural waste gas circulating and purifying device.

In order to achieve the purpose, the invention adopts the following technical scheme:

the agricultural waste gas circulating and purifying device comprises an air inlet pipeline fixedly arranged at the top of a greenhouse, an air outlet pipeline is fixedly arranged at the lower side of the air inlet pipeline, the air inlet pipeline and the air outlet pipeline are communicated with the greenhouse and the external environment, protective components are arranged at one ends of the air inlet pipeline and the air outlet pipeline arranged outside the greenhouse, a strip-shaped shell is arranged in the greenhouse, the air inlet pipeline and the air outlet pipeline are fixedly connected with the strip-shaped shell, two circular openings respectively corresponding to the air inlet pipeline and the air outlet pipeline are arranged on the strip-shaped shell, air exhaust fans are fixedly arranged in the two circular openings, the installation directions of the two air exhaust fans are opposite, a liquid storage tank bent downwards is arranged at the middle section of the air outlet pipeline, a water storage tank is arranged at one side of the air outlet pipeline, an inlet pipe and an outlet pipe are fixedly connected with the water storage tank, one end of the, the one end that the water storage box was kept away from to the outlet pipe runs through the admission line and with pipeline fixed connection and the intercommunication of giving vent to anger, the fixedly connected with pump body on the outlet pipe, one section of outlet pipe in the admission line sets up to heat exchange assemblies, the reservoir upside is equipped with the spray assembly who goes out water piping connection, the pipeline of giving vent to anger sets up the condensation subassembly that is equipped with the intercommunication admission line in the one end outside the greenhouse.

Furthermore, the protection component comprises two bending pipelines which are bent downwards, the two bending pipelines are respectively fixedly connected with the air inlet pipeline and the air outlet pipeline, a plurality of inclined rain baffles are evenly arranged in the ports of the bending pipelines, the two ends of each inclined rain baffle are fixedly connected with the inner wall of the corresponding bending pipeline, and the ports of the bending pipelines are fixedly connected with dust screens in a sealing mode.

Furthermore, the heat exchange assembly comprises a water outlet pipe which is distributed in a serpentine shape in the air inlet pipeline, a plurality of heat dissipation fins are uniformly arranged in the air inlet pipeline, the heat dissipation fins are all obliquely arranged, and the heat dissipation fins are all fixedly sleeved on the water outlet pipe.

Further, the spray set is including setting up the shower head in the pipeline of giving vent to anger, the shower head sets up at the reservoir upside, the outlet pipe run through the pipeline of giving vent to anger and with shower head fixed connection and intercommunication, the pipeline internal fixation of giving vent to anger is equipped with a plurality of ventilative suction pads, ventilative suction pad adopts the cotton fiber crops material of nylon, evenly be equipped with the bleeder vent of a plurality of buckles on the ventilative suction pad, it is a plurality of ventilative suction pad lower extreme all extends to in the reservoir, the shower head corresponds with a plurality of ventilative suction pad positions.

Further, the condensation subassembly is including setting up the bent metal sheet between pipeline and the admission line of giving vent to anger, bend the metal sheet upper end and run through the admission line and extend to inside it, bend the metal sheet lower extreme and run through the pipeline of giving vent to anger and extend to inside it, the fixed cover of fixing on the metal sheet interlude of bending is equipped with the heat blocking cover.

Further, the height of the top surface of the water storage tank is equal to that of the top surface of the liquid storage tank.

Further, the water storage tank upper end is equipped with adds the mouth, it sets up sealed lid to add the internal screw thread of mouth, water storage tank lower extreme fixedly connected with drain pipe, fixedly connected with valve on the drain pipe.

Furthermore, two inclined water baffles are symmetrically arranged in the air outlet pipeline, and the lower ends and the side ends of the two inclined water baffles are fixedly connected with the air outlet pipeline in a sealing manner.

Furthermore, an electronic densimeter is fixedly arranged in the water storage tank, and a display screen electrically connected with the electronic densimeter is fixedly arranged on the outer wall of the water storage tank.

Further, the working steps of the agricultural waste gas circulation and purification device are as follows:

a) the device is arranged at the top of the greenhouse, the air inlet pipeline and the air outlet pipeline are communicated with the interior and the exterior of the greenhouse, then the two air exhaust fans are opened, fresh air of the exterior environment is pumped into the interior of the greenhouse through the air inlet pipeline, and meanwhile, air at the top end of the interior of the greenhouse is pumped out and guided into the interior of the exterior environment through the air outlet pipeline;

b) when gas in the greenhouse passes through the gas outlet pipeline, the gas passes through the liquid storage tank, the water in the liquid storage tank can absorb ammonia gas, meanwhile, the pump body works, the water in the water storage tank is pumped into the gas outlet pipeline by the water outlet pipe and is sprayed out by the spray head to further absorb the ammonia gas, meanwhile, the water sprayed out by the spray head is stained on the breathable water absorption plate, a plurality of bent air holes in the breathable water absorption plate ensure the path length of the ammonia gas, the dissolving degree of the ammonia gas is maximized, the ammonia gas is purified, and the purified gas is discharged to the external environment through the gas outlet pipeline;

c) a bent metal plate is arranged between the air outlet pipeline and the air inlet pipeline, one end of the bent metal plate extends into the air outlet pipeline to condense and collect water vapor possibly containing ammonia water, and the other end of the bent metal plate extends into the air inlet pipeline to cool the air inlet pipeline through introduced external air so as to ensure the condensation effect of the air inlet pipeline;

d) when ammonia is dissolved in water, heat is also transferred to the water, the water circularly enters the water storage tank through the water inlet pipe and is guided into the air outlet pipeline through the water outlet pipe, when the water carrying the heat passes through the water outlet pipe section in the air inlet pipeline, the heat is transferred to the entering fresh gas, and meanwhile, a plurality of radiating fins are fixedly sleeved on the water outlet pipe to increase the heat transfer efficiency, so that the temperature of the gas guided into the greenhouse from the outside is increased, and the temperature reduction in the greenhouse is avoided;

e) the density of liquid in the water storage tank is detected by the electronic densimeter, the density is displayed on the display screen, when the density reaches a certain degree, the ammonia gas dissolution degree can be shown, at the moment, ammonia water can be discharged through the liquid outlet pipe by opening the valve, then the valve is closed, the sealing cover is unscrewed, new water is added into the water storage tank, and the collected ammonia water can be used as fertilizer;

f) the outer end through giving vent to anger pipeline and admission line sets up the pipeline of buckling, can play certain guard action, and a plurality of slope weather shields of cooperation can play the effect that prevents the rainwater and get into, and the pipeline of buckling still seals fixedly and sets up the dust screen to avoid entering such as dust and debris.

The invention has the beneficial effects that:

the invention has the advantages that the gas inlet pipeline and the gas outlet pipeline are arranged to respectively play a role in discharging waste gas and introducing fresh air, waste gas in the greenhouse can be prevented from being accumulated, oxygen supply in the greenhouse can be ensured, and when the waste gas is led out, the spraying component and the liquid storage tank are arranged, water in the water storage tank is used for absorbing ammonia gas in the waste gas, so that the waste gas can be purified at a higher degree, and ammonia water with a certain concentration is generated and used as subsequent waste materials; when absorbing waste gas, water can also absorb heat, and when fresh air enters, heat is transferred to the fresh air, so that the temperature inside the greenhouse can not be reduced, the whole device is used, and the greenhouse has high protection performance and is convenient to operate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic rear perspective view of the present invention;

FIG. 3 is a schematic side-view perspective of the present invention;

FIG. 4 is a schematic bottom perspective view of the present invention;

FIG. 5 is a schematic view of the internal structure of the air inlet duct according to the present invention;

fig. 6 is a schematic view of the internal three-dimensional structure of the air outlet pipe according to the present invention.

In the figure:

the device comprises an air inlet pipeline 1, an air outlet pipeline 2, a strip-shaped shell 3, an air exhaust fan 4, a liquid storage tank 5, a water storage tank 6, a water inlet pipe 7, a water outlet pipe 8, a bent pipeline 9, an inclined rain baffle 10, a dust screen 11, a pump body 12, a heat radiation fin 13, a spray head 14, a breathable water absorption plate 15, a bent metal plate 16, a sealing cover 17, a liquid outlet pipe 18, a valve 19, an inclined water baffle 20, an electronic densimeter 21 and a display screen 22.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some components of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, an agricultural waste gas circulation purification device comprises an air inlet pipe 1 fixedly arranged at the top of a greenhouse, fresh air of an external environment is led into the interior of the greenhouse, an air outlet pipe 2 is fixedly arranged at the lower side of the air inlet pipe 1, waste gas in the interior of the greenhouse is led out, the air inlet pipe 1 and the air outlet pipe 2 are both communicated with the greenhouse and the external environment, one ends of the air inlet pipe 1 and the air outlet pipe 2 arranged outside the greenhouse are both provided with a protection component, so that the air inlet pipe 1 and the air outlet pipe 2 are protected, sundries and the like are prevented from entering the greenhouse, a strip-shaped shell 3 is arranged in the greenhouse, the air inlet pipe 1 and the air outlet pipe 2 are both fixedly connected with the strip-shaped shell 3, two circular openings respectively corresponding to the air inlet pipe 1 and the air outlet pipe 2 are arranged on the strip-, thereby the direction of air extraction is opposite, air inlet and air outlet actions are formed, a liquid storage tank 5 which is bent downwards is arranged in the middle section of the air outlet pipeline 2 and is used for storing certain amount of water, when waste gas passes through, ammonia gas in the waste gas can be dissolved and absorbed, a water storage tank 6 is arranged on one side of the air outlet pipeline 2, the water storage tank 6 is fixedly connected with a water inlet pipe 7 and a water outlet pipe 8 which are respectively used for water inlet and water outlet, one end of the water inlet pipe 7, which is far away from the water storage tank 6, is fixedly connected and communicated with the bottom of the liquid storage tank 5, one end of the water outlet pipe 8, which is far away from the water storage tank 6, penetrates through the air inlet pipeline 1 and is fixedly connected and communicated with the air outlet pipeline 2, a pump body 12 is fixedly connected on the water outlet pipe 8, the pump body 12 adopts the prior art and can spray water out, spray water, promote the absorption of ammonia, the pipeline of giving vent to anger 2 sets up the condensation subassembly that is equipped with intercommunication inlet line 1 in the one end outside the big-arch shelter, condenses the vapor that has the ammonia.

As shown in fig. 2 and 3, the protection component comprises two bent pipelines 9 bent downwards, the two bent pipelines 9 are respectively fixedly connected with the air inlet pipeline 1 and the air outlet pipeline 2, the bent shape can avoid rainwater entering, meanwhile, the entering of objects is reduced, a plurality of inclined rain baffles 10 are evenly arranged in the port of the bent pipeline 9, two ends of the inclined rain baffles 10 are fixedly connected with the inner wall of the bent pipeline 9, the rain shielding effect is achieved, the dust screen 11 is fixedly connected with the port of the bent pipeline 9 in a sealing mode, and dust, sundries and the like can be prevented from entering.

As shown in fig. 5, the heat exchange assembly includes a water outlet pipe 8 distributed in a serpentine shape in the air inlet pipe 1, the stroke of the water with heat in the air inlet pipe 1 is prolonged, a plurality of heat dissipation fins 13 are uniformly arranged in the air inlet pipe 1, the plurality of heat dissipation fins 13 are all arranged in an inclined manner, the heat conduction efficiency is increased, and the plurality of heat dissipation fins 13 are all fixedly sleeved on the water outlet pipe 8.

As shown in fig. 6, the spray set is including setting up the shower head 14 in the pipeline 2 of giving vent to anger, carry out the blowout of water, the supplementary absorption that carries out the ammonia, shower head 14 sets up at reservoir 5 upside, outlet pipe 8 run through the pipeline 2 of giving vent to anger and communicate with shower head 14 fixed connection, the pipeline 2 internal fixation of giving vent to anger is equipped with a plurality of ventilative suction disc 15, ventilative suction disc 15 adopts the cotton-flax material of nylon, can play certain adsorption to water, evenly be equipped with the bleeder vent of a plurality of buckles on the ventilative suction disc 15, let gas can pass through, increase the absorption degree of dissolving of ammonia, a plurality of ventilative suction disc 15 lower extremes all extend to in the reservoir 5, shower head 14 corresponds with a plurality of ventilative suction disc 15 positions, be convenient for soak and change water.

As shown in fig. 5 and fig. 6, the condensing assembly includes a bent metal plate 16 disposed between the air outlet pipe 2 and the air inlet pipe 1, the upper end of the bent metal plate 16 penetrates through the air inlet pipe 1 and extends into the air inlet pipe 1, and can condense the internal water vapor containing ammonia to prevent ammonia from leaking, the lower end of the bent metal plate 16 penetrates through the air outlet pipe 2 and extends into the air outlet pipe 2, the bent metal plate 16 is cooled by external fresh air, and a heat blocking sleeve is fixedly sleeved on the middle section of the bent metal plate 16 to reduce heat loss.

As shown in fig. 3, the height of the top surface of the water storage tank 6 is equal to the height of the top surface of the liquid storage tank 5, so that the liquid level in the liquid storage tank 5 is ensured.

As shown in figure 3, the upper end of the water storage tank 6 is provided with an adding port, a sealing cover 17 is arranged in the adding port through threads, water can be added by unscrewing the sealing cover 17, the lower end of the water storage tank 6 is fixedly connected with a liquid outlet pipe 18, a valve 19 is fixedly connected onto the liquid outlet pipe 18, and ammonia water can be led out by opening the valve 19.

As shown in fig. 6, two inclined water baffles 20 are symmetrically arranged in the air outlet pipeline 2, and the lower ends and the side ends of the two inclined water baffles 20 are fixedly connected with the air outlet pipeline 2 in a sealing manner, so that a water retaining effect can be achieved, and water leakage caused by spraying can be avoided.

As shown in figure 3, the electronic densimeter 21 is fixedly arranged in the water storage tank 6, the density of liquid in the water storage tank 6 can be detected, so that the ammonia dissolving amount is displayed, and the display screen 22 electrically connected with the electronic densimeter 21 is fixedly arranged on the outer wall of the water storage tank 6, so that observation is facilitated.

The working steps of the agricultural waste gas circulation and purification device are as follows:

a) the device is installed at the top of the greenhouse, the air inlet pipeline 1 and the air outlet pipeline 2 are communicated with the interior and the exterior of the greenhouse, then the two air exhaust fans 4 are opened, fresh air of the exterior environment is pumped into the interior of the greenhouse through the air inlet pipeline 1, and meanwhile, air at the top end of the interior of the greenhouse is pumped out and guided into the interior of the exterior environment through the air outlet pipeline 2;

b) when gas in the greenhouse passes through the gas outlet pipeline 2, the gas passes through the liquid storage tank 5, the ammonia gas can be absorbed by the water in the liquid storage tank 5, meanwhile, the pump body 12 works, the water in the water storage tank 6 is pumped into the gas outlet pipeline 2 by using the water outlet pipe 8 and is sprayed out by the spray head 14, the ammonia gas is further absorbed, meanwhile, the water sprayed out by the spray head 14 is polluted on the breathable water absorption plate 15, the path length of the ammonia gas is ensured by the plurality of bent air holes in the breathable water absorption plate 15, the ammonia gas dissolution degree is maximized, the ammonia gas is purified, and the purified gas is discharged to the external environment through the gas outlet pipeline 2;

c) a bent metal plate 16 is arranged between the air outlet pipeline 2 and the air inlet pipeline 1, one end of the bent metal plate 16 extends into the air outlet pipeline 2 to condense and collect water vapor possibly containing ammonia water, and the other end of the bent metal plate 16 extends into the air inlet pipeline 1 to cool the air through introduced external air so as to ensure the condensation effect of the air;

d) when ammonia gas is dissolved in water, heat is also transferred to the water, the water circularly enters the water storage tank 6 through the water inlet pipe 7 and is led into the gas outlet pipeline 2 through the water outlet pipe 8, when the water carrying heat passes through the water outlet pipe 8 section in the gas inlet pipeline 1, the heat is conducted to the entering fresh gas, and meanwhile, a plurality of heat dissipation fins 13 are fixedly sleeved on the water outlet pipe 8 to increase the heat conduction efficiency, so that the temperature of the gas led into the greenhouse from the outside is increased, and the temperature reduction in the greenhouse is avoided;

e) the density of liquid in the water storage tank 6 is detected by the electronic densimeter 21, the density is displayed on the display screen 22, when the density reaches a certain degree, the ammonia gas dissolution degree can be shown, at the moment, ammonia water can be discharged through the liquid outlet pipe 18 by opening the valve 19, then the valve 19 is closed, the sealing cover 17 is unscrewed, new water is added into the water storage tank 6, and the collected ammonia water can be used as fertilizer;

f) set up pipeline 9 of buckling through the outer end at pipeline 2 and the admission line 1 of giving vent to anger, can play certain guard action, cooperate a plurality of slopes to keep off rain board 10 and can play the effect that prevents the rainwater and get into, buckle pipeline 9 and still sealed fixed dust screen 11 that sets up to avoid entering such as dust and debris.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.

Claims

1. A working method of an agricultural waste gas circulating and purifying device comprises an air inlet pipeline (1) and the like which are fixedly arranged at the top of a greenhouse, an air outlet pipeline (2) is fixedly arranged on the lower side of the air inlet pipeline (1), the air inlet pipeline (1) and the air outlet pipeline (2) are communicated with the greenhouse and the external environment, a protective component is arranged at one end of the air inlet pipeline (1) and one end of the air outlet pipeline (2) which are arranged outside the greenhouse, a bar-shaped shell (3) is arranged in the greenhouse, the air inlet pipeline (1) and the air outlet pipeline (2) are fixedly connected with the bar-shaped shell (3), two circular openings which respectively correspond to the air inlet pipeline (1) and the air outlet pipeline (2) are arranged on the bar-shaped shell (3), air exhaust fans (4) are fixedly arranged in the two circular openings, the installation directions of the two air exhaust fans (4) are opposite, a liquid storage tank (5) which is bent downwards is arranged in, the air outlet pipeline is characterized in that a water storage tank (6) is arranged on one side of the air outlet pipeline (2), the water storage tank (6) is fixedly connected with a water inlet pipe (7) and a water outlet pipe (8), one end, far away from the water storage tank (6), of the water inlet pipe (7) is fixedly connected and communicated with the bottom of the liquid storage tank (5), one end, far away from the water storage tank (6), of the water outlet pipe (8) penetrates through the air inlet pipeline (1) and is fixedly connected and communicated with the air outlet pipeline (2), a pump body (12) is fixedly connected onto the water outlet pipe (8), one section, in the air inlet pipeline (1), of the water outlet pipe (8) is set as a heat exchange component, a spraying component connected with the water outlet pipe (8) is arranged on the upper side of the liquid storage tank (5), a condensing component communicated with the air inlet pipeline (1) is arranged in one end, two the pipeline of buckling (9) respectively with admission line (1) and pipeline (2) fixed connection of giving vent to anger, evenly be equipped with a plurality of slopes weather shield (10) in the port of pipeline of buckling (9), a plurality of slope weather shield (10) both ends all with pipeline of buckling (9) inner wall fixed connection, the sealed fixedly connected with dust screen (11) of port of pipeline of buckling (9), heat exchange assembly includes outlet pipe (8) that is snakelike distribution in admission line (1), evenly be equipped with a plurality of heat radiation fins (13) in admission line (1), a plurality of heat radiation fins (13) all incline the setting, a plurality of heat radiation fins (13) all fix the cover and establish on outlet pipe (8), spray assembly is including setting up shower head (14) in pipeline (2) of giving vent to anger, shower head (14) set up in reservoir (5) upside, the water outlet pipe (8) penetrates through the air outlet pipeline (2) and is fixedly connected and communicated with the spray header (14), a plurality of breathable water absorption plates (15) are arranged in the air outlet pipeline (2) in a fixed mode, the breathable water absorption plates (15) are made of nylon cotton-flax materials, a plurality of bent air holes are uniformly formed in the breathable water absorption plates (15), the lower ends of the breathable water absorption plates (15) extend into the liquid storage tank (5), the spray header (14) corresponds to the breathable water absorption plates (15), the condensation assembly comprises a bent metal plate (16) arranged between the air outlet pipeline (2) and the air inlet pipeline (1), the upper end of the bent metal plate (16) penetrates through the air inlet pipeline (1) and extends into the air inlet pipeline, the lower end of the bent metal plate (16) penetrates through the air outlet pipeline (2) and extends into the air inlet pipeline, and a heat resistance sleeve is fixedly arranged on the middle section of the bent metal plate (16), an adding port is formed in the upper end of the water storage tank (6), a sealing cover (17) is arranged in the adding port in a threaded mode, a liquid outlet pipe (18) is fixedly connected to the lower end of the water storage tank (6), a valve (19) is fixedly connected to the liquid outlet pipe (18), two inclined water baffles (20) are symmetrically arranged in the air outlet pipeline (2), the lower ends and the side ends of the two inclined water baffles (20) are fixedly connected with the air outlet pipeline (2) in a sealing mode, an electronic densimeter (21) is fixedly arranged in the water storage tank (6), and a display screen (22) electrically connected with the electronic densimeter (21) is fixedly arranged on the outer wall of the water storage tank (6);

the method is characterized by comprising the following specific working steps:

a) the device is arranged at the top of the greenhouse, the air inlet pipeline (1) and the air outlet pipeline (2) are communicated with the interior and the exterior of the greenhouse, then the two air exhaust fans (4) are opened, fresh air of the exterior environment is pumped into the interior of the greenhouse through the air inlet pipeline (1), and meanwhile, air at the top end of the interior of the greenhouse is pumped out and guided into the interior of the exterior environment through the air outlet pipeline (2);

b) when gas in the greenhouse passes through the gas outlet pipeline (2), the gas can pass through the liquid storage tank (5), water in the liquid storage tank (5) can absorb ammonia gas, meanwhile, the pump body (12) works, water in the water storage tank (6) is pumped out to the gas outlet pipeline (2) through the water outlet pipe (8), then the water is sprayed out through the spray head (14), the ammonia gas is further absorbed, meanwhile, the water sprayed out through the spray head (14) is polluted on the breathable water absorption plate (15), the path length of the ammonia gas passing through is ensured through a plurality of bent air holes in the breathable water absorption plate (15), the ammonia gas is purified, and the purified gas is discharged to the external environment through the gas outlet pipeline (2);

c) a bent metal plate (16) is arranged between the air outlet pipeline (2) and the air inlet pipeline (1), one end of the bent metal plate (16) extends into the air outlet pipeline (2) to condense and collect water vapor possibly existing in ammonia water, and the other end of the bent metal plate (16) extends into the air inlet pipeline (1) to be cooled by introduced external air to ensure the condensation effect;

d) ammonia gas is dissolved in water, heat is also transferred to the water, the water circularly enters the water storage tank (6) through the water inlet pipe (7) and is led into the air outlet pipeline (2) through the water outlet pipe (8), when water carrying heat passes through the section of the water outlet pipe (8) in the air inlet pipeline (1), the heat is transferred to the entering fresh gas, and meanwhile, a plurality of heat dissipation fins (13) are fixedly sleeved on the water outlet pipe (8) to increase the heat transfer efficiency, so that the temperature of the gas led into the greenhouse from the outside is increased, and the temperature reduction in the interior of the greenhouse is avoided;

e) the density of liquid in the water storage tank (6) is detected through an electronic densimeter (21), the density is displayed on a display screen (22), when the density reaches a certain degree, the ammonia gas dissolution degree can be shown, at the moment, ammonia water can be discharged through a liquid outlet pipe (18) by opening a valve (19), then the valve (19) is closed, a sealing cover (17) is unscrewed, new water is added into the water storage tank (6), and the collected ammonia water can be used as fertilizer;

f) set up pipeline (9) of buckling through the outer end at pipeline (2) and admission line (1) of giving vent to anger, can play certain guard action, cooperate a plurality of slopes weather shield (10) can play the effect that prevents the rainwater and get into, buckle pipeline (9) still sealed fixed dust screen (11) that sets up to avoid entering such as dust and debris.

2. Method according to claim 1, wherein the height of the top surface of the reservoir (6) is equal to the height of the top surface of the reservoir (5).