CN210036043U - Energy-conserving drying device of ammonium chloride in soda production process - Google Patents
Energy-conserving drying device of ammonium chloride in soda production process Download PDFInfo
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- CN210036043U CN210036043U CN201920673825.8U CN201920673825U CN210036043U CN 210036043 U CN210036043 U CN 210036043U CN 201920673825 U CN201920673825 U CN 201920673825U CN 210036043 U CN210036043 U CN 210036043U
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Abstract
An energy-saving ammonium chloride drying device in the production process of soda ash comprises an ammonium drying furnace and a hot air drying closed circulating device, wherein a feeding hole, a discharging hole and a returning hole are formed in the ammonium drying furnace; the hot air drying sealed circulation device comprises an air flow dryer, a first cyclone separator and a premixer, wherein a second air heater used for providing hot air is communicated with the air flow dryer, a feed inlet of the air flow dryer is communicated with a material return port of a dry ammonium furnace, a discharge outlet of the air flow dryer is communicated with a feed inlet of the first cyclone separator, a first feed inlet and a second feed inlet of an external wet ammonium feeding pipeline are arranged on the premixer, a discharge outlet of the first cyclone separator is communicated with a first feed inlet of the premixer, and a discharge outlet of the premixer is communicated with a feed inlet of the dry ammonium furnace. The device mixes with wet ammonium material after heating through the returning charge that will dry the ammonium stove, returns the dry ammonium stove behind the separation gas ammonia again, and effectual reduction system energy consumption has solved the outer environmental protection problem that brings of dry ammonium tail gas simultaneously.
Description
Technical Field
The utility model relates to an ammonium chloride production technical field, especially an energy-conserving drying device of ammonium chloride in soda production process.
Background
The ammonium chloride drying process flow in the traditional sodium carbonate production process is as follows:
wet ammonium chloride in the crystallization process is fed into the vibrating feeder by a wet ammonium belt conveyor and is fed into the fluidized bed dry ammonium furnace by the vibrating feeder, the wet ammonium chloride is heated by the fluidized bed dry ammonium furnace, moisture in the wet ammonium is heated and evaporated and is taken away by tail gas, and the dried ammonium chloride overflows from a discharge hole of the dry ammonium furnace.
This process has the following drawbacks:
1. the dry ammonium tail gas has large quantity, is difficult to recycle and is directly emptied by a draught fan, and the dry ammonium tail gas contains dust and ammonia, so that the environmental protection problem is caused;
2. the hot air does not form closed circulation, and the blower needs to extract normal-temperature air to enter the air heater for heating, so that the steam consumption is increased;
3. the ammonia contained in the dry ammonium tail gas is not recycled, which brings the loss of ammonia.
Disclosure of Invention
The utility model aims to solve the technical problem that the shortage in the prior art is solved, and an energy-saving ammonium chloride drying device in the production process of the calcined soda with reasonable design, environmental protection and energy saving is provided.
The technical problem to be solved by the utility model is realized through the following technical scheme. The utility model relates to an ammonium chloride energy-saving drying device in the production process of soda ash, which comprises an ammonium drying furnace and a hot air drying closed circulating device for further improving the temperature of ammonium chloride materials, wherein the ammonium drying furnace is provided with a feed inlet, a discharge outlet and a return port; the hot air drying sealed circulation device comprises an air flow dryer, a first cyclone separator and a premixer, wherein a second air heater used for providing hot air is communicated with the air flow dryer, a feed inlet of the air flow dryer is communicated with a material return port of a dry ammonium furnace, a discharge outlet of the air flow dryer is communicated with a feed inlet of the first cyclone separator, a first feed inlet and a second feed inlet of an external wet ammonium feeding pipeline are arranged on the premixer, a discharge outlet of the first cyclone separator is communicated with a first feed inlet of the premixer, and a discharge outlet of the premixer is communicated with a feed inlet of the dry ammonium furnace.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above the energy-conserving drying device of ammonium chloride in the soda production process, last still intercommunication of second air heater has the second air-blower that is used for air transportation, the gas outlet of first cyclone and the air intake intercommunication of second air-blower.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above the soda production process in the energy-conserving drying device of ammonium chloride, still be provided with the gas outlet that is used for the exhaust ammonia on the premixer, the gas outlet intercommunication has the ammonia absorber.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above the energy-conserving drying device of ammonium chloride in the soda production process, still the intercommunication has the first air heater who is used for providing the hot-blast on the dry ammonium stove, still the intercommunication has the first air-blower that is used for air transportation on the first air heater.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, to above the soda production process in the energy-conserving drying device of ammonium chloride, still be provided with dust collector on the dry ammonium stove, dust collector includes second cyclone, and the upper end of dry ammonium stove still is provided with the gas outlet, the feed inlet of second cyclone and the gas outlet intercommunication of dry ammonium stove, the air outlet of second cyclone still communicates there is the sack cleaner, still communicates there is the suction fan on the sack cleaner.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, to above the energy-conserving drying device of ammonium chloride in the soda ash production process, the discharge gate below of dry ammonium stove still is provided with the feed bin, and the lower extreme of feed bin still is provided with packagine machine.
Compared with the prior art, the utility model is characterized in that a set of hot air drying closed circulation device is added on the traditional ammonium chloride drying process, partial returned materials from the ammonium chloride drying furnace are sent to the hot air drying closed circulation device, the materials are further heated to improve the temperature of the materials, and then the materials are mixed with wet ammonium materials in the premixer, the ammonia gas evaporated from the premixer is recovered by the system mother liquor, and the mixed materials in the premixer are sent to the ammonium chloride drying furnace;
has the advantages that:
1. the hot air drying closed circulation device performs hot air closed circulation, and the hot air drying closed circulation device is recycled, so that the steam consumption of the system is reduced;
2. the high-temperature dry ammonium material and the wet ammonium material are mixed in the premixer to evaporate ammonia gas, the ammonia gas amount is small, the ammonia gas concentration is high, the recovery treatment is easy, and the environmental protection problem caused by the large tail gas amount and the difficult recovery treatment of the ammonia in the tail gas in the original ammonium chloride drying process is solved;
3. the ammonia in the dry ammonium tail gas is recovered, and the loss of the ammonia discharged from the dry ammonium tail gas is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, an energy-saving ammonium chloride drying device in the production process of soda ash comprises an ammonium drying furnace 8 and a hot air drying closed circulation device for further increasing the temperature of ammonium chloride materials, wherein a feed inlet, a discharge outlet and a return port are formed in the ammonium drying furnace 8; the hot air drying sealed circulation device comprises an air flow dryer 4, a first cyclone separator 5 and a premixer 6, wherein a second air heater 2 for providing hot air is communicated with the air flow dryer 4, and a feeding hole and a discharging hole are formed in the air flow dryer 4; the first cyclone separator 5 is provided with a feed inlet, a discharge outlet and an air outlet; the premixer 6 is provided with a first feeding hole, a second feeding hole, a discharging hole and an air outlet; the feed inlet of the airflow dryer 4 is communicated with the material return port of the dry ammonium furnace 8, the discharge outlet of the airflow dryer 4 is communicated with the feed inlet of the first cyclone separator 5, the premixer 6 is provided with a first feed inlet and a second feed inlet externally connected with a wet ammonium feed pipeline, the discharge outlet of the first cyclone separator 5 is communicated with the first feed inlet of the premixer 6, and the discharge outlet of the premixer 6 is communicated with the feed inlet of the dry ammonium furnace 8; the return port of the dry ammonium furnace 8 is communicated with the feed port of the air flow dryer 4 through a return pipeline, the return pipeline is also provided with a spiral material conveyor 3, and the second air heater 2 is communicated with the feed port of the air flow dryer 4 through a heating pipeline and is used for conveying hot air in the second air heater 2 into the air flow dryer 4;
the dry ammonium furnace 8 adopts a fluidized bed dryer with a material returning function in the prior art, and is provided with an air inlet, a material outlet, a material inlet, a material returning port and an air outlet, wherein the air inlet is used for inputting cold air and hot air, and the air outlet is used for exhausting air; the feed inlet is used for adding the material, and the setting of discharge gate and return feed inlet is used for outwards exporting the material.
The cyclone separator adopts a cyclone separator in the prior art, is a device for separating a gas-solid system or a liquid-solid system, and has the working principle that solid particles or liquid drops with larger inertial centrifugal force are thrown and separated to the outer wall surface by virtue of the rotary motion caused by tangential introduction of airflow.
The premixer 6 adopts the premixer 6 in the prior art, is provided with a mixing chamber for containing materials, is provided with a stirring paddle in the mixing chamber, and is used for mixing the dry ammonium material output by the cyclone separator with the newly added wet ammonium material, on one hand, the gas ammonia in the wet ammonium material is evaporated, on the other hand, the wet ammonium material is preheated, and the follow-up dry ammonium furnace 8 is convenient for drying again.
The second air heater 2 is also communicated with a second air blower 1 for conveying air, and an air outlet of the first cyclone separator 5 is communicated with an air inlet of the second air blower 1; the second blower 1 is used for providing air for the second air heater 2, and the hot air separated by the first cyclone separator 5 can enter the second air heater 2 again through the second blower 1 for secondary utilization, so that the closed circulation of the hot air is realized, and the steam consumption of the system is reduced.
Still be provided with the gas outlet that is used for the exhaust gas ammonia on the premixer 6, the gas outlet intercommunication has ammonia absorber 7, and ammonia absorber 7 adopts ammonia absorber 7 among the prior art, is provided with air inlet, inlet and liquid outlet on the ammonia absorber 7, and the air inlet of ammonia absorber 7 communicates with the gas outlet of premixer 6, and the inlet and the liquid outlet of ammonia absorber 7 communicate with the mother liquor pipeline in the outside soda production process respectively, are convenient for utilize outside mother liquor to retrieve gas ammonia.
The air flow dryer 4 is an air flow dryer 4 in the prior art, which is a continuously operated dryer, hot air with a certain flow rate enters the dryer to drive wet materials in powder form to move together, and the materials are dried in the process of being conveyed by the hot air.
The dry ammonium furnace 8 is also communicated with a first air heater 15 for providing hot air, and the first air heater 15 is also communicated with a first blower 16 for conveying air. The bottom of the dry ammonium furnace 8 is also provided with an air inlet, a first air blower 16 provides air for a first air heater 15, and the air heated by the first air heater 15 is conveyed into the dry ammonium furnace 8 through the air inlet of the dry ammonium furnace 8 and is used for heating materials in the dry ammonium furnace 8; the air inlet of the dry ammonium furnace 8 is also communicated with a third blower 17 for providing cold air.
The tops of the first air heater 15 and the second air heater 2 are both connected with a steam inlet pipeline, the bottoms of the air are both connected with a condensed water return pipeline, the condensed water return pipeline is communicated with an external boiler water supply pipeline and used for supplying water to a boiler, and a deaerator is further arranged on the condensed water pipeline;
the first blower 16, the second blower 1 and the third blower 17 are all blowers in the prior art, and an air filter is also arranged inside the blowers.
Still be provided with dust collector on the dry ammonium stove 8, dust collector includes second cyclone 9, and the upper end of dry ammonium stove 8 still is provided with the gas outlet, and the feed inlet of second cyclone 9 and the gas outlet intercommunication of dry ammonium stove 8, the air outlet of second cyclone 9 still communicates bag dust collector 11, still communicates suction fan 12 on the bag dust collector 11. A star-shaped feeder 10 convenient to feed is further arranged at the discharge port of the second cyclone separator 9, and the star-shaped feeder 10 is also arranged on the bag-type dust collector 11; the gas discharged from the dry ammonium furnace 8 is firstly processed by a second cyclone separator 9 to separate the gas from the materials mixed in the gas, and the separated materials are discharged from a star-shaped feeder 10 at the discharge outlet of the second cyclone separator 9; the separated gas is sucked into a bag-type dust collector 11 by a suction fan 12, particles mixed in the gas are further filtered, and materials are further recycled; the filtered gas is discharged outside, and the filtered material is discharged from a star-shaped feeder 10 at the bag-type dust collector 11.
A storage bin 13 is further arranged below a discharge port of the dry ammonium furnace 8, a packing machine 14 is further arranged at the lower end of the storage bin 13, the storage bin 13 is used for containing dry qualified materials, and then the dry qualified materials are packed into bags by the packing machine 14, so that subsequent storage and transportation are facilitated.
The dry ammonium material in this application refers to the ammonium chloride material that the temperature is high, humidity is little, and wet ammonium material refers to the ammonium chloride material that the temperature is low, humidity is big.
An energy-saving drying method for ammonium chloride in the production process of soda ash comprises the following steps: the method comprises the steps of firstly drying the ammonium chloride material by using a dry ammonium furnace, sending the dried qualified material into a storage bin, carrying out subsequent packaging, sending part of the material into a hot air drying closed circulating device for further heating, simultaneously adding a new wet ammonium material in the heating process, separating gas from ammonia in wet ammonium, recycling, and returning the material heated by the hot air drying closed circulating device to the dry ammonium furnace, thus circulating.
The method comprises the following specific steps:
(1) feeding the ammonium chloride material into a dry ammonium furnace for heating and drying, outputting the dried qualified material from a discharge port of the dry ammonium furnace, and feeding the dried qualified material into a storage bin;
(2) part of materials are output into the airflow dryer from the material return port, and the materials are sent into the cyclone separator after heat exchange with hot air in the airflow dryer;
(3) the cyclone separator separates the fed materials from the hot air, the separated materials are fed into the premixer, and the separated hot air is fed back to the second air heater for reutilization;
(4) the dry ammonium return material entering the premixer is mixed with the newly added wet ammonium material in the premixer, the output ammonia gas is sent to an ammonia absorber for recycling, and the output material is sent back to the dry ammonium furnace;
(5) the circulation is carried out, and the materials are circularly dried.
In practical operation, dry ammonium returned material from a dry ammonium furnace is delivered to an airflow dryer through a belt conveyor and a spiral conveyor at the temperature of about 70 ℃, hot air input by an air heater is used for heating, the hot air heats air to 180-fold-by-180 ℃ by utilizing steam, the dry ammonium returned material can be heated to 150-fold-by-; meanwhile, an external wet ammonium material is sent to a premixer through a belt conveyor and a star-shaped feeder to be mixed with a dry ammonium material with the temperature of 150 ℃ - & lt 180 ℃ and the gas ammonia evaporated by the premixer is sent to an ammonia absorber to be recycled by utilizing a mother liquor of an associated alkali system, the dry material discharged from the premixer is sent to a fluidized bed drying furnace through a spiral material conveyer, the temperature of the returned dry material is about 60-70 ℃, the dry material has a certain basic temperature, and the efficiency is greatly improved compared with the mode that the external wet ammonium material is directly added into the dry ammonium furnace to be heated.
Claims (6)
1. The utility model provides an energy-conserving drying device of ammonium chloride in soda production process which characterized in that: the device comprises an ammonium drying furnace and a hot air drying closed circulating device for further improving the temperature of ammonium chloride materials, wherein the ammonium drying furnace is provided with a feeding hole, a discharging hole and a returning hole; the hot air drying sealed circulation device comprises an air flow dryer, a first cyclone separator and a premixer, wherein a second air heater used for providing hot air is communicated with the air flow dryer, a feed inlet of the air flow dryer is communicated with a material return port of a dry ammonium furnace, a discharge outlet of the air flow dryer is communicated with a feed inlet of the first cyclone separator, a first feed inlet and a second feed inlet of an external wet ammonium feeding pipeline are arranged on the premixer, a discharge outlet of the first cyclone separator is communicated with a first feed inlet of the premixer, and a discharge outlet of the premixer is communicated with a feed inlet of the dry ammonium furnace.
2. The energy-saving ammonium chloride drying device in the sodium carbonate production process according to claim 1, characterized in that: and the second air heater is also communicated with a second air blower for conveying air, and an air outlet of the first cyclone separator is communicated with an air inlet of the second air blower.
3. The energy-saving ammonium chloride drying device in the sodium carbonate production process according to claim 1, characterized in that: the premixer is also provided with an air outlet for discharging gas ammonia, and the air outlet is communicated with an ammonia absorber.
4. The energy-saving ammonium chloride drying device in the sodium carbonate production process according to claim 1, characterized in that: the dry ammonium furnace is also communicated with a first air heater for providing hot air, and the first air heater is also communicated with a first air blower for conveying air.
5. The energy-saving ammonium chloride drying device in the sodium carbonate production process according to claim 1, characterized in that: still be provided with dust collector on the dry ammonium stove, dust collector includes second cyclone, and the upper end of dry ammonium stove still is provided with the gas outlet, and the feed inlet of second cyclone communicates with the gas outlet of dry ammonium stove, and the air outlet of second cyclone still communicates there is the sack cleaner, still communicates the suction fan on the sack cleaner.
6. The energy-saving ammonium chloride drying device in the sodium carbonate production process according to claim 1, characterized in that: a storage bin is also arranged below the discharge hole of the dry ammonium furnace, and a packing machine is also arranged at the lower end of the storage bin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920673825.8U CN210036043U (en) | 2019-05-13 | 2019-05-13 | Energy-conserving drying device of ammonium chloride in soda production process |
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| CN201920673825.8U CN210036043U (en) | 2019-05-13 | 2019-05-13 | Energy-conserving drying device of ammonium chloride in soda production process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030793A (en) * | 2019-05-13 | 2019-07-19 | 连云港市福源德邦科技发展有限公司 | Ammonium chloride energy-saving drying device and its method during a kind of soda manufacture |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030793A (en) * | 2019-05-13 | 2019-07-19 | 连云港市福源德邦科技发展有限公司 | Ammonium chloride energy-saving drying device and its method during a kind of soda manufacture |
| CN110030793B (en) * | 2019-05-13 | 2024-03-29 | 连云港市福源德邦科技发展有限公司 | Energy-saving drying device and method for ammonium chloride in sodium carbonate production process |
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