CN112178638A - A device that is used for medicine pelletization, dry waste gas waste heat recovery direct combustion low nitrogen to discharge - Google Patents
A device that is used for medicine pelletization, dry waste gas waste heat recovery direct combustion low nitrogen to discharge Download PDFInfo
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- CN112178638A CN112178638A CN202010889760.8A CN202010889760A CN112178638A CN 112178638 A CN112178638 A CN 112178638A CN 202010889760 A CN202010889760 A CN 202010889760A CN 112178638 A CN112178638 A CN 112178638A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a device for granulating medicines and recovering waste heat of dry waste gas to directly burn low-nitrogen emission, which comprises a granulator and is characterized in that: fixedly connected with exhaust pipe three on the granulator, hot-blast main one, the granulator passes through hot-blast main fixedly connected with automatic valve three, the granulator passes through three fixedly connected with automatic valve two of exhaust pipe, automatic valve three keeps away from one end fixedly connected with hot-blast main two of hot-blast main one, two fixedly connected with low nitrogen combustion hot-blast stoves of automatic valve three-way overheated tuber pipe, automatic valve two keeps away from one end fixedly connected with exhaust pipe two of exhaust pipe three, the one end fixedly connected with cyclone separation device of automatic valve two is kept away from to exhaust pipe two, the last fixedly connected with of cyclone separation device collects the storehouse, exhaust pipe one keeps away from cyclone separation device's one end fixedly connected with draught fan one.
Description
Technical Field
The invention discloses a direct-fired low-nitrogen emission device for recycling waste heat of medicine granulation and drying waste gas, which is applied to medicine granulation and drying processes.
Background
Granulator and coating machine equipment are commonly used in the production process of solid preparation medicines, the traditional granulator and coating machine dry materials by heating air with steam, the steam is conveyed through a pipeline, heat loss of the steam can be generated in the process, and the heat loss is larger in the lower environmental temperature in winter. Meanwhile, the temperature of the steam is limited by the steam pressure output by the boiler, and the temperature cannot be continuously raised, so that the production efficiency is affected by the fact that the drying time is prolonged because the steam temperature is lower in the production process;
meanwhile, the moisture of the materials is dried by hot air in the production process of the granulator and the coating machine, and the discharged waste gas contains high heat, water vapor and micro particles of the materials, so that the energy conservation and emission reduction effects can be achieved by recycling the heat in the waste gas, the environmental pollution can be reduced, and the granulator and the coating machine have excellent economic benefit and social benefit.
Disclosure of Invention
The invention aims to solve the problems in the background technology, and provides a direct-fired low-nitrogen emission device for medicine granulation and drying waste gas waste heat recovery.
This discovery adopts neotype gas direct combustion heating device structure, indirect heat transfer formula hot-blast furnace, and the hot-blast furnace is formed by burning furnace and high-efficient plate heat pipe exchanger combination, and burning high temperature flue gas is not direct contact with by heated air, and the fresh air of rapid heating provides clean pollution-free hot-blast.
And the waste gas discharged by the granulating and drying equipment is introduced into the hot blast stove through an induced draft fan after cyclone separation. Venturi through the assembly in the hot-blast furnace mixes natural gas and waste gas to dilute the natural gas solubility, reuse hot-blast furnace part backward flow flue gas and natural gas mist and burn, thereby reduce combustion temperature, reduce the formation of nitrogen oxide.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a device that is used for medicine pelletization, dry waste gas waste heat recovery direct combustion low nitrogen to discharge, includes the granulator, its characterized in that: the granulator is fixedly connected with a third waste gas pipe and a first hot air pipe, the granulator is fixedly connected with a third automatic valve through the first hot air pipe, the granulator is fixedly connected with a second automatic valve through the third waste gas pipe, one end, far away from the first hot air pipe, of the third automatic valve is fixedly connected with a second hot air pipe, the second automatic valve is fixedly connected with a low-nitrogen combustion hot air furnace through the three overheated air pipe, one end, far away from the third waste gas pipe, of the second automatic valve is fixedly connected with a second waste gas pipe, one end, far away from the second automatic valve, of the second waste gas pipe is fixedly connected with a cyclone separation device, a collection bin and a first waste gas pipe are fixedly connected onto the cyclone separation device, one end, far away from the first waste gas pipe, of the first waste gas pipe is fixedly connected with a first induced draft fan, one end, the first waste gas pipe is communicated with the low-nitrogen combustion hot blast stove through a return air pipe, a second draught fan and a third draught fan are arranged on two sides of the low-nitrogen combustion hot blast stove, a fresh air pipe is arranged at the joint of the second draught fan and the low-nitrogen combustion hot blast stove, an automatic valve is arranged at the joint of the third draught fan and the low-nitrogen combustion hot blast stove, and a chimney second fixedly connected with the automatic valve far away from the third draught fan is arranged at one end of the automatic valve.
Preferably, the inside gas blending tank that is equipped with of low nitrogen combustion air heater, the air inlet and the return air duct and the gas import intercommunication of gas blending tank, the one end that the return air duct was kept away from to the gas blending tank is equipped with the combustor, the gas blending tank communicates with each other with the combustor, the one end fixedly connected with burning furnace of gas blending tank is kept away from to the combustor, be equipped with flue gas return line in the burning furnace, the heat insulating board, the one end that the combustor was kept away from to burning furnace is equipped with the high temperature exhanst gas outlet, burning furnace upper end is equipped with fresh air heat transfer chamber entry, fresh air heat transfer chamber entry has fresh air heat transfer.
Preferably, the combustor is provided with an automatic ignition device, a combustion port of the combustor is arranged in a combustion hearth, a combustor air inlet pipe is connected with the gas mixing tank, and the other end of the gas mixing tank is communicated with a Venturi tube; the introduced gas and return air are combusted at a combustion port of the combustor.
Preferably, the outlet of the fresh air heat exchange cavity of the low-nitrogen combustion hot air furnace is connected with a second hot air pipe; an inlet of the fresh air heat exchange cavity of the low-nitrogen combustion hot air furnace is connected with an air outlet of the second induced draft fan, and an air inlet of the second induced draft fan is connected with the fresh air pipe; and a high-temperature flue gas outlet of the low-nitrogen combustion hot air furnace is connected with a second chimney and an automatic valve, and the automatic valve is connected with a third air outlet of the induced draft fan and a flue gas return pipeline.
Preferably, venturi tube is arranged between the return air pipe and the gas mixing tank, the gas mixing tank is communicated with the return air pipe through the venturi tube, one end of the venturi tube, far away from the gas mixing tank, is communicated with the gas inlet, the combustion furnace chamber is provided with the plate type heat pipe heat exchanger, the cold end of the plate type heat pipe heat exchanger is placed in the combustion furnace chamber, the hot end is placed in the fresh air heat exchange cavity, and the cold end of the plate type heat pipe heat exchanger is communicated with the high-temperature flue gas outlet.
Preferably, gas blending tank fixedly connected with oxygen import, fuel inlet, waste gas import, mist export, fixedly connected with discharging pipe between fuel import, waste gas import, sliding connection has first airtight slider, the airtight slider of second in the discharging pipe, fixedly connected with connecting rod between first airtight slider, the airtight slider of second, be equipped with in the discharging pipe with first airtight slider, the airtight slider assorted stopper of second, wherein fuel import links to each other with the gas import, and waste gas import links to each other with the return air pipe, and mist export (105) links to each other with combustor (35).
Preferably, the lateral wall of the discharge pipe is provided with a plurality of groups of spray heads, the spray heads are connected in the lateral wall of the discharge pipe in a sliding manner, a plurality of groups of air injection holes are formed in the spray heads, first springs are arranged between the spray heads and the discharge pipe, two ends of each first spring are respectively and fixedly connected to the spray heads and the discharge pipe, and the discharge pipe is matched with the spray heads.
Preferably, a first heat conducting plate is arranged between the combustion hearth and the high-temperature flue gas outlet, a heat conversion rolling plate and a waste gas backflow outlet are fixedly connected onto the first heat conducting plate, a fresh air heat exchange cavity inlet is arranged at the upper end of the combustion hearth, a fresh air heat exchange cavity outlet is arranged at the upper end of the fresh air heat exchange cavity inlet, a first heating channel is arranged in the first heat conducting plate, a second heat conducting plate is arranged inside the heat conversion rolling plate, the second heat conducting plate is made of elastic heat conducting materials and is fixedly connected onto the first heat conducting plate, a plurality of groups of air release through holes are arranged on the upper surface of the heat conversion rolling plate, a second heating channel is arranged between the air release through holes and the second heat conducting plate, the second heating channel is communicated with the air release through holes and the first heating channel, a backflow heating channel is arranged at the lower end of the second heat conducting plate, and one end of the, the backflow heating channel is communicated with the waste gas backflow outlet, and the fresh air heat exchange cavity inlet is communicated with the fresh air heat exchange cavity outlet through the first heating channel, the second heating channel and the air release through hole.
Preferably, the bottom of the end, away from the first heat conducting plate, of the heat conversion rolling plate is provided with a magnetic coating, the waste gas return pipe is fixedly connected with a shell, the shell is rotatably connected with a flow control shaft, and a flow control plate is fixedly connected to the flow control shaft and is matched with the waste gas return pipe, one end, away from the waste gas return pipe, of the flow control plate is rotatably connected with a third slider, the third slider is slidably connected with a support plate, the support plate is slidably connected in the shell, a magnetic part is fixedly connected in the support plate, a second spring is arranged between the support plate and the shell, two ends of the second spring are respectively fixedly connected to the support plate and the shell, and one end, away from the shell, of the.
The advantages are that: the control of the heat value of the fuel gas is realized through the reasonable and uniform mixing of the fuel gas and the backflow waste gas, the combustion temperature of a combustor is reduced, and the total oxygen content of a combustion chamber is reduced by conveying backflow oxygen to a combustion hearth. The combination of the two can reduce the generation of nitrogen oxides. Meanwhile, the waste gas with heat and the flue gas are refluxed to further reduce the gas consumption, thereby achieving the purposes of energy conservation and emission reduction.
2. The invention replaces the traditional steam plate for heat exchange and heating, can provide higher hot air temperature, better heat exchange efficiency and stable heat supply.
3. The invention realizes the uniform mixing of three gases, can influence the discharge capacity of the other gas by controlling the discharge capacity of one gas in the mixing process, realizes indirect control and is more convenient to use.
4. The device adopts the roll up curtain formula hot plate, and accessible air input automatically regulated heating length when rolling up the curtain and unfolding completely, still can carry out the secondary heating through the waste gas backward flow, has guaranteed that temperature output is even.
Drawings
FIG. 1 is a schematic diagram of the waste heat recovery operation of the present invention;
FIG. 2 is a schematic diagram of the operation of the waste heat recovery device of the present invention;
FIG. 3 is a three-dimensional perspective view of the waste heat recovery device of the present invention;
FIG. 4 is a schematic diagram of the mixing tank configuration of the present invention;
FIG. 5 is an enlarged view of a portion A of FIG. 4 according to the present invention;
FIG. 6 is a view showing a rolling state of the hot swap flexible sheet according to the present invention;
FIG. 7 is a view showing the hot-fill flexible printed circuit board according to the present invention in an unfolded state;
FIG. 8 is a schematic view of the internal structure of the hot-fill flexible printed circuit board of the present invention;
FIG. 9 is an enlarged view of portion B of FIG. 6 in accordance with the present invention;
fig. 10 is a partial enlarged view of the portion C of fig. 7 according to the present invention.
In the figure: 1 induced draft fan I, 2 chimney I, 3 automatic valve I, 4 exhaust gas pipe I, 5 exhaust gas pipe II, 6 automatic valve II, 7 exhaust gas pipe III, 8 granulator, 9 automatic valve III, 10 hot blast pipe I, 11 induced draft fan II, 12 hot blast pipe II, 13 fresh air pipe, 14 low nitrogen combustion hot blast stove, 15 induced draft fan III, 16 chimney II, 17 automatic valve IV, 18 collection bin, 19 cyclone separation device, 30 Venturi tube, 31 flue gas reflux pipeline, 32 return air pipe, 33 fresh air heat exchange cavity outlet, 34 gas mixing tank, 35 burner, 36 combustion hearth, 37 thermal insulation board, 38 fresh air heat exchange cavity inlet, 39 high temperature flue gas outlet, 101 oxygen inlet, 103 fuel inlet, 104 exhaust gas inlet, 105 mixed gas outlet, 106 first closed slide block, 107 second closed slide block, 108 discharge pipe, 109 connecting rod, 201 nozzle, 202 jet hole, 203 first spring, 305 heat conversion roll plate, 306 a first heat conducting plate, 307 an exhaust gas return outlet, 308 a first heating channel, 401 a second heating channel, 402 a return heating channel, 403 a vent hole, 404 a second heat conducting plate, 405 a magnetic coating, 406 an exhaust gas return pipe, 501 a flow control shaft, 502 a flow control plate, 503 a third slide block, 504 a support plate, 505 a magnetic member, 506 a second spring, 507 an exhaust gas return inlet and 508 a shell.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a direct-fired low-nitrogen emission device for medicine granulation and drying waste gas waste heat recovery, which comprises a granulator (8) and is shown in figures 1-3.
Specifically, a third waste gas pipe (7) and a first hot air pipe (10) are fixedly connected to the granulator (8), an automatic valve (9) is fixedly connected to the granulator (8) through the first hot air pipe (10), an automatic valve (6) is fixedly connected to the granulator (8) through the third waste gas pipe (7), a second hot air pipe (12) is fixedly connected to one end, far away from the first hot air pipe (10), of the automatic valve (9), a low-nitrogen combustion hot air furnace (14) is fixedly connected to the automatic valve (9) through the second hot air pipe (12), a second waste gas pipe (5) is fixedly connected to one end, far away from the third waste gas pipe (7), of the automatic valve (6), a cyclone separation device (19) is fixedly connected to one end, far away from the automatic valve (6), of the second waste gas pipe (5), a collection bin (18) and a first waste gas pipe (4) are fixedly connected to one end, far away from the cyclone separation device (19), of the first waste gas pipe (4, one end fixedly connected with automatic valve (3) that exhaust pipe (4) were close to draught fan (1), one end fixedly connected with chimney (2) of draught fan (1) are kept away from in automatic valve (3), fixedly connected with return air pipe (32) are gone up in exhaust pipe (4), exhaust pipe (4) communicate with each other in low nitrogen combustion hot-blast furnace (14) through return air pipe (32), the both sides of low nitrogen combustion hot-blast furnace (14) are equipped with draught fan two (11), draught fan three (15), draught fan two (11) are equipped with bright tuber pipe (13) with low nitrogen combustion hot-blast furnace (14) junction, draught fan three (15) are equipped with automatic hot-blast furnace valve four (17) with low nitrogen combustion hot-blast furnace (14) junction, automatic valve four (17) keep away from one end fixedly connected with chimney two (16) of draught fan three (15).
Specifically, inside gas blending tank (34) that is equipped with of low nitrogen combustion hot-blast furnace (14), the air inlet and return air pipe (32) and the gas import intercommunication of gas blending tank (34), the one end that return air pipe (32) were kept away from in gas blending tank (34) is equipped with combustor (35), gas blending tank (34) communicate with each other with combustor (35), the one end fixedly connected with burning furnace (36) of gas blending tank (34) are kept away from in combustor (35), be equipped with in burning furnace (36) flue gas backflow pipeline (31), heat insulating board (37), the one end that combustor (35) were kept away from in burning furnace (36) is equipped with high temperature exhanst gas outlet (39), burning furnace (36) upper end is equipped with fresh air heat transfer chamber entry (38), fresh air heat transfer chamber entry (38) have fresh air heat transfer chamber export (33) through heat insulating board (37) intercommunication.
The automatic ignition device is arranged on the combustor (35), a combustion port of the combustor (35) is arranged in a combustion hearth (36), an air inlet pipe of the combustor (35) is connected with the gas mixing tank (34), and the other end of the gas mixing tank (34) is communicated with the Venturi tube (30), and the automatic ignition device is characterized in that gas enters the inlet of the Venturi tube (30), the Venturi tube (30) bypasses to enter return air, and the outlet of the Venturi tube (30) is connected to the gas mixing tank (34); the introduced gas and return air are combusted at a combustion port of the combustor (35).
Specifically, an outlet (33) of a fresh air heat exchange cavity of the low-nitrogen combustion hot blast stove (14) is connected with a second hot blast pipe (12); an inlet (38) of a fresh air heat exchange cavity of the low-nitrogen combustion hot blast stove (14) is connected with an air outlet of a second induced draft fan (11), and an air inlet of the second induced draft fan (11) is connected with a fresh air pipe (13); the high-temperature flue gas outlet (39) of the low-nitrogen combustion hot blast stove (14) is connected with the second chimney (16) and the automatic valve (17), and the automatic valve (17) is connected with the air outlet of the third draught fan (15) and the flue gas return pipeline (31).
Specifically, return air pipe (32) and gas blending tank (34) between be equipped with venturi (30), gas blending tank (34) communicate with each other through venturi (30) and return air pipe (32), venturi (30) keep away from the one end and the gas import of gas blending tank (34) and communicate with each other, combustion furnace (36) on be provided with plate heat pipe heat exchanger, plate heat pipe heat exchanger cold junction is placed in combustion furnace (36), the hot junction is placed in fresh air heat transfer intracavity, plate heat pipe heat exchanger cold junction intercommunication high temperature exhanst gas outlet (39).
The invention provides a direct-fired low-nitrogen emission device for granulating medicines and recovering waste heat of drying waste gas, which is shown in figures 4-10.
Specifically, the gas blending tank 34 is fixedly connected with an oxygen inlet 101, a fuel inlet 103, a waste gas inlet 104, a mixed gas outlet 105, the fuel inlet 103, a discharge pipe 108 fixedly connected with the waste gas inlet 104, a first closed slide block 106 is slidably connected with the discharge pipe 108, a second closed slide block 107 is slidably connected with the discharge pipe 108, a first closed slide block 106 is fixedly connected with a connecting rod 109 between the second closed slide blocks 107, a limiting block is arranged in the discharge pipe 108 and matched with the first closed slide block 106 and the second closed slide block 107, wherein the fuel inlet 103 is connected with the gas inlet, the waste gas inlet 104 is connected with the return air pipe 32, and the mixed gas outlet 105 is connected with the combustor 35.
Specifically, the side wall of the discharging pipe 108 is provided with a plurality of groups of spray heads 201, the spray heads 201 are slidably connected in the side wall of the discharging pipe 108, a plurality of groups of air injection holes 202 are arranged on the spray heads 201, a first spring 203 is arranged between the spray heads 201 and the discharging pipe 108, two ends of the first spring 203 are respectively and fixedly connected to the spray heads 201 and the discharging pipe 108, and the discharging pipe 108 is matched with the spray heads 201.
Specifically, a first heat conducting plate 306 is arranged between the combustion hearth 36 and the high-temperature flue gas outlet 39, a heat conversion rolling plate 305 and a waste gas return outlet 307 are fixedly connected to the first heat conducting plate 306, a fresh air heat exchange cavity inlet 38 is arranged at the upper end of the combustion hearth 36, a fresh air heat exchange cavity outlet 33 is arranged at the upper end of the fresh air heat exchange cavity inlet 38, a first heating channel 308 is arranged in the first heat conducting plate 306, a second heat conducting plate 404 is arranged in the heat conversion rolling plate 305, the second heat conducting plate 404 is made of elastic heat conducting material, the second heat conducting plate 404 is fixedly connected to the first heat conducting plate 306, a plurality of groups of air bleeding through holes 403 are arranged on the upper surface of the heat conversion rolling plate 305, a second heating channel 401 is arranged between the air bleeding through holes 403 and the second heat conducting plate 404, the second heating channel 401 is communicated with the air bleeding through holes 403 and the first heating channel 308, a return heating channel 402 is arranged at the lower, the return heating channel 402 is communicated with the exhaust gas return outlet 307, and the fresh air heat exchange cavity inlet 38 is communicated with the fresh air heat exchange cavity outlet 33 through the first heating channel 308, the second heating channel 401 and the air bleeding through hole 403.
Specifically, the bottom of the heat conversion rolling plate 305, which is away from the first heat conducting plate 306, is provided with a magnetic plating layer 405, the exhaust gas return pipe 406 is fixedly connected with a casing 508, the casing 508 is rotatably connected with a flow control shaft 501, the flow control plate 502 is fixedly connected to the flow control shaft 501, the flow control plate 502 is matched with the exhaust gas return pipe 406, one end of the flow control plate 502, which is away from the exhaust gas return pipe 406, is rotatably connected with a third slider 503, the third slider 503 is slidably connected with a support plate 504, the support plate 504 is slidably connected in the casing 508, the support plate 504 is fixedly connected with a magnetic part 505, a second spring 506 is arranged between the support plate 504 and the casing 508, two ends of the second spring 506 are respectively fixedly connected to the support plate 504 and the casing 508, and.
FIGS. 1-3 work principle:
1) starting up: and simultaneously, starting a second induced draft fan, a third induced draft fan and a fourth automatic valve, and introducing fresh air to sweep the hot blast stove.
2) Mixing gas: the Venturi tube gas valve and the automatic valve I are started, gas and air enter the gas mixing tank after being mixed through the Venturi tube, then the gas mixing tank valve is opened, the burner is started, the burner is automatically ignited and then burns in the combustion hearth, high-temperature smoke is generated in the combustion hearth to heat the cold end of the plate type heat pipe heat exchanger, and fresh air is heated through the hot end of the plate type heat pipe heat exchanger. The heated hot air passes through the outlet of the fresh air heat exchange cavity, the automatic valve III, the hot air pipe II and the hot air pipe I and is conveyed to the granulator.
3) Waste gas treatment: the waste gas after the granulator is used is transmitted to the cyclone separation device through the waste gas pipe III, the automatic valve II and the waste gas pipe I, and dust particles separated by cyclone are collected through the collection bin and are treated in a centralized mode.
4) And in the step of returning air to the low-nitrogen combustion hot blast stove, the waste gas after cyclone separation and filtration is conveyed to a gas mixing tank through a first waste gas pipe, a first induced draft fan and a first return air pipe after returning to a bypass of a venturi tube and mixing with the gas, and the gas is used by a combustor.
5) And controlling the combustion temperature, namely monitoring the air outlet temperature by a temperature sensing probe arranged at the outlet of the fresh air heat exchange cavity.
Temperature sensing probes arranged at three positions of the exhaust pipe monitor the temperature of the exhaust gas. The temperature sensing probe arranged at the flue gas return pipeline monitors the temperature of the returned flue gas. The combustion flame size of the burner is automatically controlled through the 3 temperature variation quantities, and the purpose of temperature control is achieved.
6) The technical principle of the low-nitrogen combustor is that nitrogen in air reacts with oxygen at high temperature to generate nitrogen oxide. The amount of nitrogen and oxygen reacted at high temperatures depends primarily on the combustion temperature, nitrogen concentration and oxygen concentration. The higher the temperature and the higher the concentration, the more nitrogen oxides are produced. The hot blast stove adopts a flue gas reflux mode, and the reflux flue gas is mixed into the combustion hearth to reduce the oxygen content in the hearth within a reasonable range. Meanwhile, the waste gas after cyclone separation treatment is recycled and mixed with the fuel gas, the concentration of the fuel gas is changed, and the heat value of the fuel gas is reduced, so that the combustion temperature is reduced, the amount of nitrogen oxide generated is lower, and reasonable oxygen amount is ensured for combustion.
Fig. 4-10 work principle:
when a user mixes gas, different gases are introduced into the fuel inlet 103, the oxygen inlet 101 and the waste gas inlet 104, after the gas is introduced into the fuel inlet 103, the gas pressure pushes the spray head 201 to move outwards, the gas is sprayed out through the gas spraying holes 202, when the introduced gas is excessive, the limited spray head 201 does not meet the pressure relief of the gas, the gas pressure pushes the first closed slide block 106 to move downwards, the spray head 201 which is originally in a closed state in the first closed slide block 106 is influenced by the gas pressure and automatically opens, so that the gas is uniformly sprayed in the gas mixing tank 34, and after the introduction of the gas is stopped, the spray head 201 is pulled by the first spring 203 to automatically reset;
when the fuel inlet 103 is filled with fuel gas and simultaneously filled with waste gas into the waste gas inlet 104, when the ventilation volumes of the fuel gas and the waste gas are the same, the two sides of the fuel inlet 103 and the waste gas inlet 104 simultaneously push the first sealing slide block 106 and the second sealing slide block 107 to move towards the middle end, because the connecting rod 109 is fixedly connected between the first sealing slide block 106 and the second sealing slide block 107, the first sealing slide block 106 and the second sealing slide block 107 are positioned at the middle section, when the ventilation volume of the fuel gas is larger than the ventilation volume of the waste gas, the fuel gas pushes the first sealing slide block 106 to move downwards, because the connecting rod 109 is fixedly connected between the first sealing slide block 106 and the second sealing slide block 107, the first sealing slide block 106 and the second sealing slide block 107 integrally move towards one end with smaller air pressure, so that the air pressure in the discharge pipe 108 is balanced, thereby controlling the uniform mixing of the fuel gas and, a user can change the spraying amount of the waste gas of the second closed sliding block 107 in the gas mixing tank 34 by adjusting the ventilation amount of the gas in the fuel inlet 103, so that the three gases are uniformly mixed;
when the combustion furnace 36 is in combustion, hot air passes through the first heat conduction plate 306, so that heat energy is conducted through the first heat conduction plate 306, the upper end of the first heat conduction plate 306 is fixed in the fresh air heat exchange cavity inlet 38, when fresh air is introduced into the fresh air heat exchange cavity inlet 38, the fresh air passes through the first heating channel 308, at the moment, the fresh air is heated by the first heat conduction plate 306, the heated fresh air is introduced into the second heating channel 401, the lower end of the second heating channel 401 is provided with the second heat conduction plate 404, the second heat conduction plate 404 carries out secondary heating on the fresh air, and then the fresh air is discharged from the air discharge through hole 403, when the fresh air ventilation is small, the heat conversion rolling plate 305 is in a half-unfolding half-rolling state under the action of air pressure, at the moment, the gas is in contact with the first heat conduction plate 306 for a long time, and is discharged from the air discharge through hole 403 on the unfolding end heat conversion rolling plate 305 after heating, when the fresh air ventilation, at the moment, the second heating channel 401 is unfolded under the action of air pressure, after the second heating channel is unfolded, the magnetic coating 405 arranged at the tail end of the heat conversion rolling plate 305 is matched with the magnetic part 505, the supporting plate 504 is pulled to move upwards, at the moment, the third sliding block 503 drives the flow control plate 502 to rotate around the flow control shaft 501, so that the waste gas backflow pipe 406 is opened, at the moment, waste gas enters the waste gas backflow pipe 406 through the waste gas backflow inlet 507, the waste gas backflow pipe 406 is communicated with the backflow heating channel 402, the waste gas is introduced into the backflow heating channel 402 through the waste gas backflow pipe 406, at the moment, the waste gas reflows to carry out secondary heating on fresh air in the second heating channel 401, and the;
when the heat conversion rolling plate 305 is rolled, the supporting plate 504 is acted by the second spring 506, the supporting plate 504 is pulled to be positioned at the lower end, at the moment, the flow control plate 502 is matched with the waste gas return pipe 406, the waste gas return pipe 406 is closed, when the heat conversion rolling plate 305 is unfolded, the lower end of the heat conversion rolling plate 305 is provided with the magnetic coating 405, the magnetic coating 405 and the magnetic member 505 are matched with each other, at the moment, the magnetic member 505 moves upwards, the supporting plate 504 is pulled to move upwards, at the moment, the third sliding block 503 is connected to the supporting plate 504 in a sliding mode, the flow control plate 502 is connected to the third sliding block 503 and the flow control shaft 501 in a rotating mode, the flow control plate 502 rotates around the flow control shaft 501, at the moment, the waste gas return pipe 406 is opened, when the heat conversion rolling plate 305 is rolled again, the supporting plate 504 automatically resets, at the.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a device that is used for medicine pelletization, dry waste gas waste heat recovery direct-fired low nitrogen to discharge, includes granulator (8), its characterized in that: the granulator (8) is fixedly connected with a third waste gas pipe (7) and a first hot air pipe (10), the granulator (8) is fixedly connected with a third automatic valve (9) through the first hot air pipe (10), the granulator (8) is fixedly connected with a second automatic valve (6) through the third waste gas pipe (7), one end, far away from the first hot air pipe (10), of the third automatic valve (9) is fixedly connected with a second hot air pipe (12), the third automatic valve (9) is fixedly connected with a low-nitrogen combustion hot air furnace (14) through the second hot air pipe (12), one end, far away from the third waste gas pipe (7), of the second automatic valve (6) is fixedly connected with a second waste gas pipe (5), one end, far away from the second automatic valve (6), of the second waste gas pipe (5) is fixedly connected with a cyclone separation device (19), a collection bin (18) and a first waste gas pipe (4) are fixedly connected to a first induced draft fan (1), the automatic control system comprises a waste gas pipe I (4), an automatic valve (3) and a low-nitrogen combustion hot blast stove (14), wherein the end, close to a draught fan I (1), of the waste gas pipe I (4) is fixedly connected with the automatic valve (3), one end, far away from the draught fan I (1), of the automatic valve (3) is fixedly connected with a chimney I (2), a return air pipe (32) is fixedly connected to the waste gas pipe I (4), the waste gas pipe I (4) is communicated with the low-nitrogen combustion hot blast stove (14) through the return air pipe (32), draught fans II (11) and III (15) are arranged on two sides of the low-nitrogen combustion hot blast stove (14), a fresh air pipe (13) is arranged at the joint of the draught fans II (11) and the low-nitrogen combustion hot blast stove (14), an automatic hot blast stove valve IV (17) is arranged;
a gas mixing tank (34) is arranged inside the low-nitrogen combustion hot blast stove (14), an air inlet of the gas mixing tank (34) is communicated with a gas inlet through a return air pipe (32), a burner (35) is arranged at one end, far away from the return air pipe (32), of the gas mixing tank (34), the gas mixing tank (34) is communicated with the burner (35), one end, far away from the gas mixing tank (34), of the burner (35) is fixedly connected with a combustion hearth (36), a flue gas return pipeline (31) and a heat insulation plate (37) are arranged in the combustion hearth (36), a high-temperature flue gas outlet (39) is arranged at one end, far away from the burner (35), of the combustion hearth (36), a fresh air heat exchange cavity inlet (38) is arranged at the upper end of the combustion hearth (36), and the fresh air heat exchange cavity inlet (38) is communicated with a fresh air heat;
an automatic ignition device is arranged on the combustor (35), a combustion port of the combustor (35) is arranged in a combustion hearth (36), an air inlet pipe of the combustor (35) is connected with the gas mixing tank (34), the other end of the gas mixing tank (34) is communicated with the Venturi tube (30), the automatic ignition device is characterized in that gas enters an inlet of the Venturi tube (30), the Venturi tube (30) bypasses to enter return air, and an outlet of the Venturi tube (30) is connected to the gas mixing tank (34); the introduced fuel gas and return air are combusted at a combustion port of the combustor (35);
an outlet (33) of a fresh air heat exchange cavity of the low-nitrogen combustion hot blast stove (14) is connected with a second hot blast pipe (12); an inlet (38) of a fresh air heat exchange cavity of the low-nitrogen combustion hot blast stove (14) is connected with an air outlet of a second induced draft fan (11), and an air inlet of the second induced draft fan (11) is connected with a fresh air pipe (13); the high-temperature flue gas outlet (39) of the low-nitrogen combustion hot blast stove (14) is connected with the second chimney (16) and the automatic valve (17), and the automatic valve (17) is connected with the air outlet of the third draught fan (15) and the flue gas return pipeline (31).
2. The device for granulating medicines, recovering waste heat of drying exhaust gas and directly burning low-nitrogen emission as claimed in claim 1, wherein: return air pipe (32) and gas blending tank (34) between be equipped with venturi (30), gas blending tank (34) communicate with each other through venturi (30) and return air pipe (32), venturi (30) keep away from the one end and the gas import of gas blending tank (34) and communicate with each other, combustion furnace (36) on be provided with plate heat pipe heat exchanger, plate heat pipe heat exchanger cold junction is placed in combustion furnace (36), the hot junction is placed in fresh air heat transfer intracavity, plate heat pipe heat exchanger cold junction intercommunication high temperature exhanst gas outlet (39).
3. The device for granulating medicines, recovering waste heat of drying exhaust gas and directly burning low-nitrogen emission as claimed in claim 1, wherein: gas blending tank (34) fixedly connected with oxygen import (101), fuel inlet (103), waste gas import (104), mist export (105), fixedly connected with discharging pipe (108) between fuel import (103), waste gas import (104), discharging pipe (108) sliding connection has first airtight slider (106), the airtight slider of second (107), fixedly connected with connecting rod (109) between first airtight slider (106), the airtight slider of second (107), be equipped with in discharging pipe (108) with first airtight slider (106), the airtight slider of second (107) assorted stopper, wherein fuel import (103) link to each other with the gas import, waste gas import (104) link to each other with return air pipe (32), and mist export (105) link to each other with combustor (35).
4. The device for granulating medicines, recovering waste heat of drying exhaust gas and directly burning low-nitrogen emission as claimed in claim 3, wherein: discharging pipe (108) lateral wall is equipped with multiunit shower nozzle (201), shower nozzle (201) sliding connection is in discharging pipe (108) lateral wall, be equipped with multiunit fumarole (202) on shower nozzle (201), be equipped with first spring (203) between shower nozzle (201), discharging pipe (108), the both ends of first spring (203) fixed connection respectively is on shower nozzle (201), discharging pipe (108) and shower nozzle (201) phase-match.
5. The device for granulating medicines, recovering waste heat of drying exhaust gas and directly burning low-nitrogen emission as claimed in claim 1, wherein: a first heat-conducting plate (306) is arranged between the combustion hearth (36) and the high-temperature flue gas outlet (39), a heat conversion rolling plate (305) and a waste gas backflow outlet (307) are fixedly connected to the first heat-conducting plate (306), a fresh air heat exchange cavity inlet (38) is arranged at the upper end of the combustion hearth (36), a fresh air heat exchange cavity outlet (33) is arranged at the upper end of the fresh air heat exchange cavity inlet (38), a first heating channel (308) is arranged in the first heat-conducting plate (306), a second heat-conducting plate (404) is arranged inside the heat conversion rolling plate (305), the second heat-conducting plate (404) is made of elastic heat-conducting materials, the second heat-conducting plate (404) is fixedly connected to the first heat-conducting plate (306), a plurality of groups of air bleeding through holes (403) are arranged on the upper surface of the heat conversion rolling plate (305), and a second heating channel (401) is arranged between the air bleeding, the second heating channel (401) is communicated with the air bleeding through hole (403) and the first heating channel (308), a backflow heating channel (402) is arranged at the lower end of the second heat conduction plate (404), one end, far away from the first heat conduction plate (306), of the backflow heating channel (402) is detachably connected with a waste gas backflow pipe (406), the backflow heating channel (402) is communicated with a waste gas backflow outlet (307), and the fresh air heat exchange cavity inlet (38) is communicated with the fresh air heat exchange cavity outlet (33) through the first heating channel (308), the second heating channel (401) and the air bleeding through hole (403).
6. The device for granulating medicines, recovering waste heat of drying exhaust gas and directly burning low-nitrogen emission as claimed in claim 5, wherein: the bottom of one end, far away from the first heat conducting plate (306), of the heat conversion rolling plate (305) is provided with a magnetic coating (405), the waste gas return pipe (406) is fixedly connected with a shell (508), a flow control shaft (501) is rotationally connected with the shell (508), a flow control plate (502) is fixedly connected onto the flow control shaft (501), the flow control plate (502) is matched with the waste gas return pipe (406), one end, far away from the waste gas return pipe (406), of the flow control plate (502) is rotationally connected with a third sliding block (503), the third sliding block (503) is slidably connected with a supporting plate (504), the supporting plate (504) is slidably connected into the shell (508), a magnetic part (505) is fixedly connected into the supporting plate (504), a second spring (506) is arranged between the supporting plate (504) and the shell (508), and two ends of the second spring (506) are respectively and fixedly connected to the supporting, And one end of the waste gas return pipe (406) far away from the shell (508) is fixedly connected with a waste gas return inlet (507).
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| CN202010889760.8A CN112178638B (en) | 2020-08-28 | 2020-08-28 | A device that is used for medicine pelletization, dry waste gas waste heat recovery direct combustion low nitrogen to discharge |
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| CN202010889760.8A CN112178638B (en) | 2020-08-28 | 2020-08-28 | A device that is used for medicine pelletization, dry waste gas waste heat recovery direct combustion low nitrogen to discharge |
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| CN112178638B (en) | 2022-10-04 |
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