CN109761519B - Intelligent calcining system for building gypsum and using method - Google Patents

Intelligent calcining system for building gypsum and using method Download PDF

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CN109761519B
CN109761519B CN201910197932.2A CN201910197932A CN109761519B CN 109761519 B CN109761519 B CN 109761519B CN 201910197932 A CN201910197932 A CN 201910197932A CN 109761519 B CN109761519 B CN 109761519B
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chamber
calcining
communicated
cooling
aging
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CN109761519A (en
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赵兴银
张洪伟
赵辛
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Taian Jiepu Gypsum Technology Co ltd
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Taian Jiepu Gypsum Technology Co ltd
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Abstract

The invention relates to an intelligent calcining system for building gypsum and a using method thereof, wherein the intelligent calcining system comprises a calcining chamber, an aging chamber and a cooling chamber which are sequentially communicated, and a dust collecting system which is communicated with the calcining chamber, the aging chamber and the cooling chamber, wherein the cooling chamber is provided with a discharge hole, the calcining chamber is connected with a feeding system and a heat work system, and the lower parts of the calcining chamber and/or the aging chamber and/or the cooling chamber are communicated with an air distribution system. According to the invention, the calcining, ageing, cooling and dust collection of the building gypsum are integrated, so that the occupied space of conveying equipment and equipment for materials is greatly reduced, and the device is convenient to arrange, energy-saving and clean in production; by arranging the air distribution system, the materials in the calcining chamber, the ageing chamber and the cooling chamber are fluidized, so that the accurate control of the dehydration, ageing and cooling of gypsum is realized, and the quality and consistency of products are ensured.

Description

Intelligent calcining system for building gypsum and using method
Technical Field
The invention relates to the field of building gypsum calcination equipment, in particular to an intelligent calcination system for building gypsum and a use method thereof.
Background
In the process of processing the building gypsum, the gypsum powder needs to be calcined so as to convert the dihydrate gypsum into semi-hydrated gypsum, but a small amount of dihydrate gypsum and overburning anhydrous gypsum can remain in the conversion process, so that the quality and stability of the product are affected. The existing calcining equipment is usually a rotary kiln, a fluidized bed furnace, a frying pan and the like, the calcining quality is unstable, and more conveying equipment is needed, so that the space requirement is high.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an intelligent calcining system for building gypsum and a using method thereof.
The invention is realized by the following technical scheme, and provides an intelligent calcining system for building gypsum, which comprises a calcining chamber, an aging chamber and a cooling chamber which are sequentially communicated, and a dust collecting system which is communicated with the calcining chamber, the aging chamber and the cooling chamber, wherein the cooling chamber is provided with a discharge hole, the calcining chamber is connected with a feeding system and a heat work system, and the lower parts of the calcining chamber and/or the aging chamber and/or the cooling chamber are communicated with an air distribution system.
When the method is used, the materials to be calcined are fed into the calcining chamber through the feeding system, heat is provided for the calcining chamber through the heat power system, the materials are calcined and dehydrated, and the fluidized bed heat exchange technology ensures higher heat exchange efficiency and maximally reduces the residual dihydrate gypsum; because a small amount of anhydrous tri-type gypsum is generated in the calcined material, the calcined material enters an aging room for aging, so that the residual dihydrate gypsum is continuously converted into semi-hydrated gypsum, and the anhydrous tri-type gypsum is converted into the semi-hydrated gypsum by absorbing moisture; after ageing, the materials enter a cooling chamber to be cooled, so that semi-hydrated gypsum is prevented from continuing to change phase and finally flows out through a discharge hole, upward gas is introduced into the calcining chamber, the ageing chamber and the cooling chamber through an air distribution system, the materials in the chambers are ensured to be in a fluidized state by the introduced gas, the mixing among the materials is increased, and the calcining, ageing and cooling effects are improved; the gas introduced by the air distribution system and the water vapor dehydrated by the gypsum finally enter the dust collection system, the dust carried away by the gas is separated by the high-efficiency pulse bag type dust collector, the dust returns to the calcination chamber, and clean air is discharged.
As the optimization, calcination room, ageing room and cooling chamber are vertical structure, and are equipped with respectively from top downwardly extending's baffle that changes to at calcination room, ageing room and cooling chamber, all are equipped with the partition baffle that upwards extends between calcination room and the ageing room and between ageing room and the cooling chamber, partition baffle and change to baffle staggered arrangement, partition baffle highly be less than calcination room feed inlet, be higher than the discharge gate on the cooling chamber, partition baffle top is equipped with the passageway that supplies the material to pass through. According to the optimization scheme, the calcining chamber, the aging chamber and the cooling chamber are arranged into a vertical structure, the transverse occupied space is reduced, the arrangement is more convenient, the partition plates and the redirection partition plates are arranged in a staggered mode, materials firstly flow downwards, then flow upwards around the lower ends of the redirection partition plates, flow transversely through channels above the partition plates, flow downwards after being blocked by the redirection partition plates in the aging chamber, so that the flow of the materials is S-shaped, the mass transfer time of the materials is prolonged, and the calcining, aging and cooling effects are further improved.
As optimization, the lower parts of the calcining chamber, the ageing chamber and the cooling chamber are all conical with big top and small bottom, and the air distribution system is communicated with the conical part. The lower parts of the calcining chamber, the aging chamber and the cooling chamber are all set to be conical, and after the air distribution system is filled with air inwards, the fluidization of materials is ensured, the mass transfer effect is improved, and the dead bed is reduced.
As optimization, the wind distribution system comprises a main pipeline communicated with an air source and branch pipelines respectively communicated with the calcination chamber, the aging chamber and the cooling chamber, wherein the branch pipelines are communicated with the main pipeline and are provided with an electric flow valve and a flowmeter, and the electric flow valve and the flowmeter are electrically connected and controlled in a closed loop. The air source is an air compressor or a Roots blower, and a pressure reducing valve is also arranged on the main pipeline. The wind distribution system of the optimization scheme can independently introduce gas into the calcination chamber, the aging chamber and the cooling chamber through the arrangement of the main pipeline and the branch pipeline, can select the on-off of the branch pipeline according to the requirement, detects the gas flow through the flowmeter, feeds back the flow signal to the electric flow valve, automatically closes down the electric flow valve if the flow exceeds a set interval, automatically increases the opening amplitude of the electric flow valve if the flow does not reach the set interval, realizes the intelligent control of the air supply quantity, ensures better calcination effect and simpler operation.
As optimization, the heat power system comprises a heat exchange tube arranged in the calcination chamber, a heat source outlet tube communicated with one end of the heat exchange tube, and a heat source inlet tube communicated with the other end of the heat exchange tube, wherein an electric flow valve is arranged on the heat source inlet tube. According to the optimal scheme, the heat source inlet pipe is used for introducing the heat medium into the heat exchange pipe, the heat medium flows out of the heat source outlet pipe after exchanging heat with the materials, and the flow of the heat medium can be regulated by arranging the electric flow valve, so that the intelligent level of calcination heating is improved.
Preferably, the feeding system comprises a metering screw conveyor and a feeding pipe which communicates a discharge hole of the metering screw conveyor with a feeding hole of the calcining chamber. The feeding system of the optimization scheme is simple in structure, and the feeding is performed through the metering screw conveyor, so that the continuity of materials is guaranteed, and the continuity of calcination is guaranteed.
Preferably, the dust collection system is positioned above the calcining chamber, the ageing chamber and the cooling chamber. Further reducing the lateral footprint of the device.
As optimization, the dust collecting system comprises a dust collecting upper box body and a dust collecting lower box body provided with a conveying screw, wherein the dust collecting upper box body is internally divided into a cloth bag dust removing area and an air duct area through a longitudinal partition plate, the air duct area below the sloping plate is communicated with the calcining chamber, the aging chamber and the cooling chamber, the air duct area above the sloping plate is communicated with the cloth bag dust removing area, an air outlet is formed in the side wall of the dust collecting box body above the sloping plate, and a discharge hole of the conveying screw is communicated with the calcining chamber. When the dust collecting system of the embodiment is used, dust-carrying gas flowing out of the calcination chamber, the aging chamber and the cooling chamber enters the air channel region below the inclined plate, then enters the cloth bag dust removing region from the lower part, upwards passes through the dust removing cloth bag, and the gas upwards passing through the dust removing cloth bag enters the air channel region above the inclined plate, finally flows out of the air outlet hole, dust blocked by the filter bag falls to the conveying screw, and then is conveyed to the calcination chamber by the conveying screw to participate in calcination drying again.
The application method of the intelligent calcination system comprises the following steps:
1. the material to be calcined is conveyed into the calcining chamber through the feeding system, the calcining chamber is heated through the thermal power system, so that the material is heated and dehydrated, the calcined material enters the aging chamber for aging, the aged material enters the cooling chamber for cooling, finally, the material flows out through the discharging port, and the material flows from the calcining chamber to the aging chamber and the cooling chamber in sequence by using fluidization wind;
2. when calcining, ageing and cooling are carried out, upward gas is introduced into the calcining chamber, the ageing chamber and the cooling chamber through the air distribution system, and the materials in each chamber are in a fluidized state by utilizing the introduced gas, so that mass transfer among the materials is increased, and calcining, ageing and cooling effects are improved;
3. dust-carrying gas generated in the calcining chamber, the ageing chamber and the cooling chamber is purified by a dust collecting system, so that the environment is prevented from being polluted by the dust-carrying gas;
4. the dust collection induced draft fan, the screw conveyor of the feeding system, the air compressor of the air distribution system and the start and stop of the heat power system are controlled by the control system, so that the intelligent level of the use of the calcining system is improved;
5. in the air distribution system, the air flow is detected through the flowmeter, and a flow signal is fed back to the electric flow valve through the control system or is directly fed back to the electric flow valve, if the flow exceeds a set interval, the electric flow valve is automatically turned off, and if the flow does not reach the set interval, the electric flow valve automatically increases the opening amplitude, so that the intelligent control of the air supply quantity is realized, the calcination effect is better, and the operation is simpler.
The beneficial effects of the invention are as follows: by setting the calcining, ageing, cooling and dust collection of the building gypsum into an integrated structure, the occupied space of conveying equipment and equipment of materials is greatly reduced, and the device is convenient to arrange, energy-saving and clean in production; by arranging the air distribution system, the materials in the calcining chamber, the ageing chamber and the cooling chamber are fluidized, so that the accurate control of the dehydration, ageing and cooling of gypsum is realized, and the quality and consistency of products are ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a view in the direction B of FIG. 1;
FIG. 3 is a control schematic diagram of the present invention;
the figure shows:
1. the device comprises a feeding system, 2, a heat power system, 3, a heat source outlet pipe, 4, a heat source inlet pipe, 5, a main pipe, 6, an electric flow valve, 7, a flowmeter, 8, a branch pipe, 9, a calcining chamber, 10, an ageing chamber, 11, an air distribution system, 12, a partition plate, 13, a cooling chamber, 14, a redirection plate, 15, a discharge hole, 16, an air outlet hole, 17, a dust collection system, 18 and a conveying screw.
Detailed Description
In order to clearly illustrate the technical characteristics of the scheme, the scheme is explained below through a specific embodiment.
The intelligent calcining system for building gypsum comprises a calcining chamber 9, an aging chamber 10 and a cooling chamber 13 which are sequentially communicated, and a dust collecting system 17 which is communicated with the calcining chamber, the aging chamber and the cooling chamber, wherein the cooling chamber is provided with a discharge hole 15, the calcining chamber is connected with a feeding system 1 and a heat work system 2, and the lower parts of the calcining chamber, the aging chamber and the cooling chamber are all communicated with an air distribution system 11.
The calcination chamber, the aging chamber and the cooling chamber are all of vertical structures, the upper part is in a straight cylinder shape, the lower part is in a conical shape with a big upper part and a small lower part, the air distribution system is communicated with the conical part, and the bottom of the conical part is provided with a discharging door for cleaning the residual materials. The calcining chamber, the ageing chamber and the cooling chamber are respectively provided with a redirection baffle 14 which extends downwards from the top, partition baffles 12 which extend upwards are respectively arranged between the calcining chamber and the ageing chamber and between the ageing chamber and the cooling chamber, the height of each partition baffle 12 is lower than that of a feeding hole of the calcining chamber and higher than that of a discharging hole of the cooling chamber, a channel for materials to pass through is arranged above each partition baffle, and the partition baffles and the redirection baffles are staggered to form an S-shaped material channel.
The wind distribution system comprises a main pipeline 5 communicated with a gas source and branch pipelines 8 respectively communicated with a calcination chamber, an ageing chamber and a cooling chamber, wherein the branch pipelines are communicated with the main pipeline, and an electric flow valve 6 and a flowmeter 7 are arranged on each branch pipeline, and the electric flow valve 6 and the flowmeter 7 are controlled in a closed loop mode. The side of the taper is provided with an air inlet which is matched with the air outlet end of the branch pipe, and the position is set up to ensure fluidization effect and prevent materials from falling into the air distribution box under the action of gravity.
The air source of this embodiment is air compressor machine or roots's fan, still installs the relief pressure valve on the trunk line of export, avoids the air current pressure too big and forms the destruction to the normal flow of material.
The heat power system 2 comprises a heat exchange tube arranged in the calcination chamber, a heat source outlet tube 3 communicated with one end of the heat exchange tube, and a heat source inlet tube 4 communicated with the other end of the heat exchange tube, wherein an electric flow valve is arranged on the heat source inlet tube 4.
The feeding system comprises a metering screw conveyor and a feeding pipe which communicates a discharge hole of the metering screw conveyor with a feed hole of the calcining chamber.
The dust collecting system 17 is located above the calcining chamber, the aging chamber and the cooling chamber, the top of the calcining chamber, the aging chamber and the cooling chamber is provided with a vent hole communicated with the dust collecting system, the concrete structure of the dust collecting system comprises a dust collecting upper box body and a dust collecting lower box body provided with a conveying screw 18, the dust collecting upper box body is internally divided into a cloth bag dust removing area and an air duct area through a longitudinal partition plate, the air duct area below the sloping plate is communicated with the vent hole at the top of the calcining chamber, the aging chamber and the cooling chamber, the air duct area above the sloping plate is communicated with the cloth bag dust removing area, the side wall of the dust collecting box body above the sloping plate is provided with an air outlet hole 16, and the discharge hole of the conveying screw is communicated with the calcining chamber. During calcination, dust-carrying gas enters the air channel area below the inclined plate through each vent hole, then enters the cloth bag dust removing area from the lower part of the longitudinal partition plate, upwards passes through the dust removing cloth bag, and the gas upwards passing through the dust removing cloth bag enters the air channel area above the inclined plate, finally flows out from the air outlet hole, dust blocked by the filter bag falls to the conveying screw, and then is conveyed to the calcination chamber by the conveying screw to participate in calcination again.
The embodiment also comprises a control system, wherein the control system is electrically connected with the dust collection induced draft fan, the feeding system metering screw conveyor, the air compressor of the air distribution system or the Roots blower, and the heat power system is controlled in a closed loop manner, and the control system is used for controlling the adjustment and the start and stop of each part, so that the air discharge quantity of the dust collection induced draft fan, the material quantity of the feeding system metering screw conveyor, the air flow of the air distribution system and the heat supply quantity of the heat power system are controlled. In the air distribution system, the air flow is detected through the flowmeter, a flow signal is fed back to the electric flow valve through the control system, and can be directly fed back to the electric flow valve, if the flow exceeds a set interval, the electric flow valve is automatically turned off, and if the flow does not reach the set interval, the electric flow valve automatically increases the opening amplitude, so that the intelligent control of the air supply quantity is realized.
The use method of the intelligent calcination system comprises the following aspects:
1. the material to be calcined is conveyed into the calcining chamber through the feeding system, the calcining chamber is heated through the heat-power system, the material is subjected to heat exchange with a heat medium in the heat exchange tube in the calcining chamber, so that the material is calcined, heated and dehydrated, the calcined material enters the aging chamber for aging, the aged material enters the cooling chamber for cooling, finally, the material flows out through the discharge port, and the material flows from the calcining chamber to the aging chamber and the cooling chamber in sequence by using fluidization wind;
2. when calcining, ageing and cooling are carried out, upward gas is introduced into the calcining chamber, the ageing chamber and the cooling chamber through the air distribution system, and the materials in each chamber are in a fluidized state by utilizing the introduced gas, so that the mass transfer between the materials and the surrounding space is increased, and the calcining, ageing and cooling effects are improved;
3. dust-carrying gas generated in the calcining chamber, the ageing chamber and the cooling chamber is purified by a dust collecting system, so that the environment is prevented from being polluted by the dust-carrying gas;
4. the dust collection induced draft fan, the feeding system metering screw conveyor, the air compressor of the air distribution system or the Roots blower and the adjustment and start-stop of the heat power system are controlled by the control system, so that the intelligent level of the use of the calcining system is improved;
5. in the air distribution system, the air flow is detected through the flowmeter, and a flow signal is fed back to the electric flow valve through the control system or is directly fed back to the electric flow valve, if the flow exceeds a set interval, the electric flow valve is automatically turned off, and if the flow does not reach the set interval, the electric flow valve automatically increases the opening amplitude, so that the intelligent control of the air supply quantity is realized, the calcination effect is better, and the operation is simpler.
Of course, the above description is not limited to the above examples, and the technical features of the present invention that are not described may be implemented by or by using the prior art, which is not described herein again; the above examples and drawings are only for illustrating the technical scheme of the present invention and not for limiting the same, and the present invention has been described in detail with reference to the preferred embodiments, and it should be understood by those skilled in the art that changes, modifications, additions or substitutions made by those skilled in the art without departing from the spirit of the present invention and the scope of the appended claims.

Claims (7)

1. An intelligent calcination system for building gypsum, characterized in that: the device comprises a calcining chamber (9), an aging chamber (10) and a cooling chamber (13) which are sequentially communicated, and a dust collection system (17) which is communicated with the calcining chamber, the aging chamber and the cooling chamber, wherein the cooling chamber is provided with a discharge port (15), the calcining chamber is connected with a feeding system (1) and a heat work system (2), and the lower parts of the calcining chamber and/or the aging chamber and/or the cooling chamber are communicated with an air distribution system (11);
the calcining chamber, the aging chamber and the cooling chamber are of vertical structures, redirection baffle plates (14) extending downwards from the top are respectively arranged in the calcining chamber, the aging chamber and the cooling chamber, partition baffle plates (12) extending upwards are arranged between the calcining chamber and the aging chamber and between the aging chamber and the cooling chamber, the height of each partition baffle plate (12) is lower than the feeding port of the calcining chamber and higher than the discharging port of the cooling chamber, and a channel for materials to pass through is arranged above each partition baffle plate;
the system also comprises a control system, wherein the control system is electrically connected with the dust collection induced draft fan, the feeding system metering screw conveyor, the air compressor or the Roots blower of the air distribution system and the heat power system and is in closed-loop control, and the control system is used for controlling the adjustment and the start and stop of each part so as to control the air discharge quantity of the dust collection induced draft fan, the material quantity of the feeding system metering screw conveyor, the air flow of the air distribution system and the heat supply quantity of the heat power system;
the application method of the intelligent calcination system for building gypsum comprises the following steps:
1) The material to be calcined is conveyed into the calcining chamber through the feeding system, the calcining chamber is heated through the thermal power system, so that the material is heated and dehydrated, the calcined material enters the aging chamber for aging, the aged material enters the cooling chamber for cooling, and finally flows out through the discharging port;
2) When calcining, ageing and cooling are carried out, upward gas is introduced into the calcining chamber, the ageing chamber and the cooling chamber through the air distribution system, and the materials in each chamber are in a fluidized state by utilizing the introduced gas;
3) Purifying dust-carrying gas generated in the calcining chamber, the ageing chamber and the cooling chamber through a dust collection system;
4) The control system is used for controlling the air discharge quantity of the dust collection induced draft fan, the material quantity of the feeding system metering screw conveyor, the air flow of the air distribution system and the heat supply quantity of the heat power system;
5) In the air distribution system, the air flow is detected through the flowmeter, a flow signal is fed back to the electric flow valve through the control system, or is directly fed back to the electric flow valve, if the flow exceeds a set interval, the electric flow valve is automatically turned off, and if the flow does not reach the set interval, the electric flow valve automatically increases the opening amplitude.
2. The intelligent calcination system for building gypsum according to claim 1, wherein: the lower parts of the calcining chamber, the ageing chamber and the cooling chamber are all conical with big top and small bottom, and the air distribution system is communicated with the conical part.
3. The intelligent calcination system for building gypsum according to claim 1, wherein: the wind distribution system comprises a main pipeline (5) communicated with a gas source and branch pipelines (8) respectively communicated with the calcination chamber, the aging chamber and the cooling chamber, wherein the branch pipelines are communicated with the main pipeline and are provided with an electric flow valve (6) and a flowmeter (7), and the electric flow valve (6) and the flowmeter (7) are in closed-loop control.
4. The intelligent calcination system for building gypsum according to claim 1, wherein: the heat power system (2) comprises a heat exchange tube arranged in the calcination chamber, a heat source outlet tube (3) communicated with one end of the heat exchange tube, and a heat source inlet tube (4) communicated with the other end of the heat exchange tube, wherein an electric flow valve is arranged on the heat source inlet tube (4).
5. The intelligent calcination system for building gypsum according to claim 1, wherein: the feeding system comprises a metering screw conveyor and a feeding pipe which is used for communicating a discharge hole of the metering screw conveyor with a feeding hole of the calcining chamber.
6. The intelligent calcination system for building gypsum according to claim 1, wherein: the dust collection system (17) is positioned above the calcining chamber, the ageing chamber and the cooling chamber.
7. The intelligent calcination system for building gypsum according to claim 6, wherein: the dust collection system (17) comprises a dust collection upper box body and a dust collection lower box body provided with a conveying screw (18), the dust collection upper box body is internally divided into a cloth bag dust collection area and an air duct area through a longitudinal partition plate, the air duct area below the inclined plate is communicated with the calcining chamber, the aging chamber and the cooling chamber, the air duct area above the inclined plate is communicated with the cloth bag dust collection area, an air outlet (16) is formed in the side wall of the dust collection box body above the inclined plate, and a discharge hole of the conveying screw is communicated with the calcining chamber.
CN201910197932.2A 2019-03-15 2019-03-15 Intelligent calcining system for building gypsum and using method Active CN109761519B (en)

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CN113233802A (en) * 2020-06-03 2021-08-10 山东天力能源股份有限公司 Integrated processing device for compound
CN112159135A (en) * 2020-09-16 2021-01-01 四川宏达股份有限公司 Vertical flow type gypsum calcining equipment
CN113955959B (en) * 2021-11-26 2022-12-30 贵州开迪绿色建筑材料有限公司 Device and method for producing anhydrous gypsum by using fresh phosphogypsum
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CN115724605B (en) * 2022-11-25 2024-04-16 中国科学院过程工程研究所 Quick ageing system and method for gypsum

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CN101817649A (en) * 2010-05-10 2010-09-01 贾会平 Method and equipment for calculating materials
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