CN214528170U - Novel calcining system for hydrotalcite - Google Patents
Novel calcining system for hydrotalcite Download PDFInfo
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- CN214528170U CN214528170U CN202120186735.3U CN202120186735U CN214528170U CN 214528170 U CN214528170 U CN 214528170U CN 202120186735 U CN202120186735 U CN 202120186735U CN 214528170 U CN214528170 U CN 214528170U
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Abstract
The utility model discloses a novel system of calcining, in particular to novel system of calcining for houghite, include: novel three-dimensional burning furnace, the discharge gate of novel three-dimensional burning furnace passes through the upper portion feed inlet of pipe connection finished product feed bin, and the fused salt export of pipe connection molten salt stove is passed through in the lateral wall heat source import of novel three-dimensional burning furnace, and the fused salt import of pipe connection molten salt storage tank is passed through in the lateral wall fused salt export of novel three-dimensional burning furnace, and the fused salt storage tank passes through the fused salt import of pipe connection molten salt stove. The utility model discloses the high-temperature gas that the three-dimensional burning furnace produced is as the hot-blast heat source of using of drying, the energy saving. The novel three-dimensional calcining furnace has the advantages of less gas quantity, low flow velocity, no need of a complicated dust removal system and resource saving.
Description
Technical Field
The utility model relates to a high temperature calcination equipment technical field, in particular to novel calcination system for hydrotalcite.
Background
Hydrotalcite requires different moisture, components and structures in different application fields, so that hydrotalcite dehydration or decomposition to prepare hydrotalcite skeleton for further synthesis of other products requires calcination of hydrotalcite. The traditional calcining method mostly adopts devices such as a rotary kiln, a fluidized bed and the like, and can achieve the aim of calcining, but the problems of unstable quality, high energy consumption, complex dedusting system, large investment and the like exist. In order to solve the problems, the utility model discloses carried out a series of improvements, adopted new calcination scheme, better solved above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solve the above-mentioned existing problem among the prior art, provide a novel system of calcining for hydrotalcite to solve present technical problem.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model provides a novel system of calcining for hydrotalcite, include: novel three-dimensional burning furnace, the discharge gate of novel three-dimensional burning furnace passes through the upper portion feed inlet of pipe connection finished product feed bin, and the fused salt export of pipe connection molten salt stove is passed through in the lateral wall heat source import of novel three-dimensional burning furnace, and the fused salt import of pipe connection molten salt storage tank is passed through in the lateral wall fused salt export of novel three-dimensional burning furnace, and the fused salt storage tank passes through the fused salt import of pipe connection molten salt stove.
Preferably, the upper portion feed inlet of the novel three-dimensional calcining furnace is connected with a discharge port of a second conveyor through a pipeline, the feed inlet of the second conveyor is connected with a lower portion outlet of a second storage bin, an upper portion inlet of the second storage bin is connected with a lower portion discharge port of a cyclone separator and a bag-type dust collector through pipelines, an upper portion air outlet of the cyclone separator is connected with an inlet of the bag-type dust collector through a pipeline, and an upper portion air outlet of the bag-type dust collector is connected with an inlet of an induced draft fan.
Preferably, including the plate and frame filter press, the access connection feed line of plate and frame filter press, the lower part feed opening of plate and frame filter press connects triangle-shaped material receiving funnel, triangle-shaped material receiving funnel's feed opening connects the feed inlet of first conveyer, the import of flash dryer's first feed bin is connected to the feed opening of first conveyer, the feed inlet of the exit linkage flash dryer's of first feed bin feed auger, the exit linkage flash dryer's of feed auger feed inlet, the import of pipe connection cyclone is passed through in flash dryer's upper portion export.
Preferably, the method comprises the following steps: the air outlet of the first air blower is connected with the cooling air inlet of the finished product bin through a pipeline, and the cooling air outlet of the finished product bin is connected with the lower air inlet of the molten salt furnace through a pipeline.
Preferably, the bottom of the molten salt furnace is provided with a gas nozzle, the gas nozzle is connected with a gas pipeline and a combustion-supporting gas pipeline, and the gas outlet of the molten salt furnace is connected with a hot furnace gas inlet of the fin heat exchanger through a pipeline.
Preferably, a cold air inlet of the fin heat exchanger is connected with an air outlet of the second air blower, and a hot air exhaust port of the fin heat exchanger is connected with a bottom air inlet of the flash evaporation dryer through a pipeline.
Preferably, two air outlets at the upper part of the novel three-dimensional calcining furnace are connected to an air outlet pipeline of the molten salt furnace through pipelines and are connected with the air outlet pipeline of the molten salt furnace.
The utility model has the advantages that:
(1) the utility model discloses calcination temperature is even, and product quality is stable. Different amounts of crystal water can be removed according to the needs, and interlayer anions such as carbonate can also be removed according to the needs to prepare the hydrotalcite framework.
(2) The utility model discloses the high-temperature gas that the three-dimensional burning furnace produced is as the hot-blast heat source of using of drying, the energy saving.
(3) The utility model discloses a novel three-dimensional burning furnace produce tolerance few, the velocity of flow is low, need not numerous and diverse dust pelletizing system, saves the resource.
(4) The utility model discloses an aperture of adjustment bottom bleeder valve effectively controls the falling speed and the ejection of compact degree of consistency of charge level in the stove. The control is simple and the operation is easy.
(5) The utility model discloses set up the temperature and pressure measuring point of drying about, made things convenient for the technology to adjust, guaranteed technological parameter's stability. Conditional can also be set as automatic regulation and control, and the effect is better.
Drawings
The above advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of a novel calcination system for hydrotalcite according to an embodiment of the present invention.
Description of reference numerals:
in fig. 1, 1 — plate and frame filter press; 2-triangular material receiving funnel; 3-a first conveyor; 4-a first silo; 5, a feeding auger; 6-flash dryer; 7-molten salt storage tank; 8-molten salt submerged pump; 9-molten salt furnace; 10-finished product bin; 11 — a first blower; 12-a novel three-dimensional calcining furnace; 13-a second conveyor; 14-bag dust collector; 15-induced draft fan; 16-a cyclone separator; 17-a second bunker; 18-a second blower; 19-fin heat exchanger.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only 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.
The utility model provides a novel calcining system for hydrotalcite, which comprises a plate-and-frame filter press 1, wherein the inlet of the plate-and-frame filter press 1 is connected with a feed pipeline, and the water outlet is connected with a water outlet pipeline; the lower feed opening is connected with a triangular receiving funnel 2; the feed opening of the triangular material receiving funnel 2 is connected with the feed opening of the first conveyor 3, the feed opening of the first conveyor 3 is connected with the inlet of the first bin 4 of the flash dryer 6, and the outlet of the first bin 4 is connected with the feed opening of the feed auger 5 of the flash dryer 6; the outlet of the feeding auger 5 is connected with the feeding hole of the flash dryer 6. An upper outlet of the flash dryer 6 is connected with an inlet of the cyclone separator 16 through a pipeline, and an upper air outlet of the cyclone separator 16 is connected with an inlet of the bag-type dust collector 14 through a pipeline; an air outlet at the upper part of the bag-type dust collector 14 is connected with an inlet of an induced draft fan 15; the lower discharge ports of the cyclone separator 16 and the bag-type dust collector 14 are connected with the upper inlet of the second storage bin 17 through pipelines, and the lower outlet of the second storage bin 17 is connected with the feed inlet of the second conveyor 13; the discharge port of the second conveyor 13 is connected with the upper feed port of the novel three-dimensional calcining furnace 12 through a pipeline, and the discharge ports at the lower part and the side part of the novel three-dimensional calcining furnace 12 are connected with the upper feed port of the finished product bin 10 through pipelines. The side wall heat source inlet of the novel three-dimensional calcining furnace 12 is connected with the molten salt outlet of the molten salt furnace 9 through a pipeline; the side wall fused salt outlet of the novel three-dimensional calcining furnace 12 is connected with the fused salt inlet of the fused salt storage tank 7 through a pipeline; a molten salt submerged pump 8 is arranged in the molten salt storage tank 7, and an outlet of the molten salt submerged pump 8 is connected with a molten salt inlet of a molten salt furnace 9 through a pipeline. An air outlet of the first air blower 11 is connected with a cooling air inlet of the finished product bin 10 through a pipeline, and a cooling air outlet of the finished product bin 10 is connected with an air inlet at the lower part of the molten salt furnace 9 through a pipeline. The gas nozzle at the bottom of the molten salt furnace 9 is connected with a gas and combustion-supporting gas pipeline and used for heating the molten salt furnace 9, a gas outlet at the upper side of the molten salt furnace 9 is connected with a hot furnace gas inlet of the finned heat exchanger 19 through a pipeline, and meanwhile, redundant gas is connected to a furnace gas recycling pipeline through a pipeline. A cold air inlet of the fin heat exchanger 19 is connected with an air outlet of the second air blower 18; the hot exhaust port of the fin heat exchanger 19, namely the hot exhaust port heated by cold air entering from the second air blower 18, is connected with the bottom air inlet of the flash dryer 6 through a pipeline. The furnace gas outlet after heat exchange in the fin heat exchanger 19 can be connected to a waste heat recovery device through a pipeline.
Two air outlets at the upper part of the novel three-dimensional calcining furnace 12 are connected to an air outlet pipeline of the molten salt furnace 9 through pipelines and are connected with an air outlet pipeline of the molten salt furnace.
In addition, the device is provided with a plurality of temperature and pressure measuring points.
Molten salt pipeline: the upper part of the molten salt storage tank 7, a molten salt outlet pipeline of the molten salt furnace 9 and a molten salt outlet pipeline of the novel three-dimensional calcining furnace 12;
material pipeline: temperature measuring points are arranged on an outlet pipeline of the flash dryer 6, an inlet pipeline of the bag-type dust collector 14, a feed inlet pipeline of the novel three-dimensional calcining furnace 12 and a discharge outlet pipeline of the novel three-dimensional calcining furnace 12.
A gas pipeline: temperature and pressure measuring devices are arranged on a gas and combustion-supporting gas inlet pipeline of the molten salt furnace 9, a gas outlet pipeline after combustion of the molten salt furnace 9, a gas outlet pipeline of the fin heat exchanger 19, a gas outlet pipeline of the novel three-dimensional calcining furnace, a molten salt furnace combustion gas recycling pipeline and the like.
The hydrotalcite filter cake after filter pressing is sent into a first bin 4 of a flash dryer 6 through a triangular material receiving funnel 2 by a first conveyor 3, and then sent into the flash dryer 6 after being minced by a feeding auger 5, wet materials are subjected to direct convection contact heat exchange with hot air entering from the bottom in the flash dryer, the materials are dried, the dried materials are taken out from the top by the hot air to enter a cyclone separator 16, and after cyclone separation, the upper air outlet is subjected to dust removal by a cloth bag and is discharged out of a system by a draught fan. The materials separated by cyclone separation and cloth bag dust removal enter a second bin 17 and then are sent into the top inlet of the novel three-dimensional calcining furnace 12 through a second conveyor 13, and are heated and calcined by high-temperature molten salt flowing in the flat-laid type row pipes which are arranged in staggered mode, hydrotalcite is dehydrated, and the hydrotalcite can reach the decomposition temperature according to the process requirement, so that the hydrotalcite is decomposed. The two sides of the bottom and the bottom of the novel three-dimensional calcining furnace 12 are respectively provided with a discharge outlet, the main structure of the novel three-dimensional calcining furnace 12 is a common calcining furnace, a heating pipe is connected between a side wall heat source inlet and a side wall molten salt outlet of the novel three-dimensional calcining furnace 12 in a distinguishing way, the heating pipe comprises a plurality of metal pipes, the side wall heat source inlet and the side wall molten salt outlet are uniformly distributed in the novel three-dimensional calcining furnace, and the side wall of the novel three-dimensional calcining furnace 12 is penetrated through the side wall. The side wall heat source inlet of the novel three-dimensional calcining furnace 12 is connected with the molten salt outlet of the molten salt furnace 9 through a pipeline; the side wall fused salt outlet of the novel three-dimensional calcining furnace 12 is connected with the fused salt inlet of the fused salt storage tank 7 through a pipeline.
The vapor or decomposed gas generated by decomposing the hydrotalcite in the novel three-dimensional calcining furnace 12 is discharged through exhaust holes at two sides of the upper part, and the discharged vapor and hot air are merged into an exhaust system of the molten salt furnace 9 and are used for heating and drying hot air for a flash evaporation drying system. In order to make the material plane in the novel three-dimensional calcining furnace 12 stably move downwards, the bottom and the side part of the novel three-dimensional calcining furnace are respectively provided with three discharge ports, and the material is uniformly dropped by adjusting the opening degree of a discharge valve. The calcined material at the bottom of the novel three-dimensional calcining furnace 12 is discharged into a finished product bin 10, and enters a packaging system after being cooled by cold air sent by a first air blower.
The molten salt stored in the molten salt tank 7 is pumped into the molten salt furnace 9 through the molten salt pump 8, the molten salt is heated in the molten salt furnace 9, the temperature is further increased, different process requirements are met as required, the molten salt flows into the novel three-dimensional calcining furnace 12 to calcine materials, the molten salt discharged from the novel three-dimensional calcining furnace 12 automatically flows into the molten salt storage tank 7, the molten salt is pumped into the molten salt furnace 9 through the molten salt submerged pump 8 to be heated to a specified temperature, the molten salt is continuously circulated and supplied to the novel three-dimensional calcining furnace 12, and the material calcining requirements are met.
The pipeline in the device is a common pipeline, and the first conveyor and the second conveyor are two conveyor belts.
The process device has guiding function on material flow, control drying and calcination effect in the process by arranging a plurality of temperature and pressure measuring points; the drying effect can be better controlled by measuring the temperature in the drying process, and the drying moisture is ensured to meet the requirement. The measurement of the inlet and outlet temperature of the fused salt and the materials of the novel three-dimensional calcining furnace can better control the calcining effect of the materials; the combustion and heat exchange conditions can be well controlled by measuring the temperature and pressure of each gas path, and the combustion and heat exchange of the fuel gas can be well controlled by gas allocation. High-temperature gas discharged by the novel three-dimensional calcining furnace is merged into smoke discharged by the molten salt furnace, and cold air blown into the drying system is heated by the high-temperature gas to reach the temperature and pressure required by drying. The combustion gas which is subjected to heat exchange and then is discharged out of the fin heat exchanger 19 can be sent to a waste heat boiler and the like to recover waste heat.
The utility model discloses a molten salt furnace calcines the mode, can control different calcination temperatures as required, and control hydrotalcite that can be better dewaters or decomposes the degree, can get rid of one to several crystal water, also can further get rid of carbonate, decomposes completely until the hydroxide and prepares the hydrotalcite skeleton to prepare other derivatives.
The utility model discloses a heat energy comprehensive utilization, the high temperature gas that molten salt stove and novel three-dimensional burning furnace produced is used for heating drying system's cold wind, goes waste heat utilization system again to the combustion gas that goes out finned heat exchanger, further retrieves the heat, makes the energy obtain make full use of.
The redundant combustion gas of molten salt furnace can go the heat conduction oil heating or exhaust-heat boiler recycle waste heat, and the energy saving is environmental protection.
The system adopts fused salt heating calcination, the process is simple, and the investment is saved.
The novel three-dimensional calcining furnace adopts the discharge at the bottom and two sides, can better control the material layer to flow uniformly, has uniform system temperature, fast dehydration or decomposition, uniform quality and good product calcining effect.
The molten salt is adopted for heating, the material flows from top to bottom by gravity, the material is heated and decomposed, the exhaust is less, the flow rate is low, and a huge and complicated dust removal treatment device is not needed.
Example 1:
as described above, the ratio of magnesium to aluminum is 2: 1, drying the hydrotalcite filter cake with the water content of less than 50% by adopting hot air with the temperature of 160-190 ℃ in a flash evaporation dryer to obtain the dried hydrotalcite with the water content of less than 0.5%. Calcining at 240-280 ℃ in a novel three-dimensional calcining furnace to obtain the hydrotalcite without 3 crystal water.
Example 2:
as described above, the ratio of magnesium to aluminum is 2: 1, drying the hydrotalcite filter cake with the water content of less than 50% by adopting hot air with the temperature of 160-190 ℃ in a flash evaporation dryer to obtain the dried hydrotalcite with the water content of less than 0.5%. Calcining at 340-360 ℃ in a novel three-dimensional calcining furnace to obtain the hydrotalcite with 3 crystal water and part of carbonate removed.
Example 3:
as described above, the ratio of magnesium to aluminum is 2: 1, drying the hydrotalcite filter cake with the water content of less than 50% by adopting hot air with the temperature of 160-190 ℃ in a flash evaporation dryer to obtain the dried hydrotalcite with the water content of less than 0.5%. Calcining at 450-550 ℃ in a novel three-dimensional calcining furnace to obtain the hydrotalcite framework with crystal water and carbonate removed.
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 and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (7)
1. A novel calcination system for hydrotalcite comprising: novel three-dimensional calcining furnace, its characterized in that: the novel discharge gate of three-dimensional burning furnace passes through the upper portion feed inlet of pipe connection finished product feed bin, the fused salt export of pipe connection molten salt stove is passed through in the lateral wall heat source import of novel three-dimensional burning furnace, the fused salt import of pipe connection molten salt storage tank is passed through in the lateral wall fused salt export of novel three-dimensional burning furnace, and the fused salt import of pipeline connection molten salt stove is passed through to the fused salt storage tank.
2. The novel calcination system for hydrotalcite according to claim 1, characterized in that: the novel upper portion feed inlet of three-dimensional calcining furnace passes through the discharge gate of pipe connection second conveyer, the feed inlet of second conveyer is connected with the lower part export of second feed bin, the upper portion import of second feed bin passes through the lower part discharge gate of pipe connection in cyclone and sack cleaner, the import of pipe connection sack cleaner is passed through to cyclone's upper portion air outlet, the import of draught fan is connected to the upper portion air outlet of sack cleaner.
3. The novel calcination system for hydrotalcite according to claim 1, characterized in that: including plate and frame filter press, plate and frame filter press's access connection feed line, plate and frame filter press's lower part feed opening connects triangle-shaped material receiving funnel, triangle-shaped material receiving funnel's feed opening connects the feed inlet of first conveyer, the import of flash dryer's first feed bin is connected to first conveyer's feed opening, the feed inlet of the exit linkage flash dryer's of first feed bin feed auger, the exit linkage flash dryer's of feed auger feed inlet, the import of pipe connection cyclone is passed through in flash dryer's upper portion export.
4. The novel calcination system for hydrotalcite according to claim 1, characterized in that: the method comprises the following steps: the air outlet of the first air blower is connected with the cooling air inlet of the finished product bin through a pipeline, and the cooling air outlet of the finished product bin is connected with the lower air inlet of the molten salt furnace through a pipeline.
5. The novel calcination system for hydrotalcite according to claim 1, characterized in that: the bottom of the molten salt furnace is provided with a gas nozzle, the gas nozzle is connected with a gas pipeline and a combustion-supporting gas pipeline, and a gas outlet of the molten salt furnace is connected with a hot furnace gas inlet of the fin heat exchanger through a pipeline.
6. The novel calcination system for hydrotalcite according to claim 5, characterized in that: and a cold air inlet of the fin heat exchanger is connected with an air outlet of the second air blower, and a hot exhaust port of the fin heat exchanger is connected with a bottom air inlet of the flash evaporation dryer through a pipeline.
7. The novel calcination system for hydrotalcite according to claim 1, characterized in that: and two air outlets at the upper part of the novel three-dimensional calcining furnace are connected to an air outlet pipeline of the molten salt furnace through a pipeline and are connected with the air outlet pipeline of the molten salt furnace.
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| CN202120186735.3U CN214528170U (en) | 2021-01-25 | 2021-01-25 | Novel calcining system for hydrotalcite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112919510A (en) * | 2021-01-25 | 2021-06-08 | 泰安渤洋化工科技有限公司 | Novel calcining system for hydrotalcite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112919510A (en) * | 2021-01-25 | 2021-06-08 | 泰安渤洋化工科技有限公司 | Novel calcining system for hydrotalcite |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A new calcination system for hydrotalcite Effective date of registration: 20220622 Granted publication date: 20211029 Pledgee: Bank of Tai'an Limited by Share Ltd. Pledgor: TAIAN BOYANG CHEMICAL TECHNOLOGY Co.,Ltd. Registration number: Y2022980008536 |
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Date of cancellation: 20230615 Granted publication date: 20211029 Pledgee: Bank of Tai'an Limited by Share Ltd. Pledgor: TAIAN BOYANG CHEMICAL TECHNOLOGY Co.,Ltd. Registration number: Y2022980008536 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A New Calcination System for Hydrotalcite Effective date of registration: 20230621 Granted publication date: 20211029 Pledgee: Bank of Tai'an Limited by Share Ltd. Pledgor: TAIAN BOYANG CHEMICAL TECHNOLOGY Co.,Ltd. Registration number: Y2023980044856 |