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CN217202540U - Equipment for producing lime by using alternative fuel - Google Patents

Equipment for producing lime by using alternative fuel Download PDF

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Publication number
CN217202540U
CN217202540U CN202220525806.2U CN202220525806U CN217202540U CN 217202540 U CN217202540 U CN 217202540U CN 202220525806 U CN202220525806 U CN 202220525806U CN 217202540 U CN217202540 U CN 217202540U
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China
Prior art keywords
preheater
rotary kiln
lime
alternative fuel
communicated
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CN202220525806.2U
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Chinese (zh)
Inventor
张平
代伟林
张北京
齐闯
苏华伟
靳静然
耿鹏浩
曹月仙
罗风立
任春生
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CITIC Heavy Industries Co Ltd
CITIC Heavy Industry Engineering Technology Co Ltd
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CITIC Heavy Industries Co Ltd
CITIC Heavy Industry Engineering Technology Co Ltd
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Priority to CN202220525806.2U priority Critical patent/CN217202540U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/40Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

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Abstract

The utility model discloses an equipment for producing lime by using alternative fuel, which relates to the technical field of lime production, and comprises a preheater bin, a preheater, a rotary kiln, a cooler, a hot blast stove and a burner, wherein the preheater receives a limestone raw material from the preheater bin, the preheated material is conveyed to the rotary kiln for further treatment, and the calcined lime enters the cooler for cooling; the outer side of the preheater is provided with a hot blast stove using alternative fuel, and the hot blast stove blows hot air into the preheater through a high-temperature fan; and a burner is arranged on the outer side of the end part of the rotary kiln close to the kiln head, and a substituted fuel feeding pipe and an air inlet pipe communicated with the outlet of the Roots blower are arranged on the burner. The utility model discloses can utilize alternative fuels such as straw, junked tire, ultralow calorific value coal gas to produce lime, equipment structure is simple, economic environmental protection, and production effect is good.

Description

Equipment for producing lime by using alternative fuel
Technical Field
The utility model relates to a lime production technical field, concretely relates to utilize equipment of alternative fuel production lime.
Background
The existing active lime production mainly uses high-calorific-value coal powder, natural gas, coke oven gas and the like as fuels. The fuel is sprayed into the rotary kiln from a kiln head burner to provide a heat source for roasting the active lime. The limestone raw material enters a bin at the top of the preheater, is uniformly distributed into the preheater through a plurality of discharging slide pipes, is preheated and heated by reverse hot air flow from the rotary kiln, and the preheated limestone enters the rotary kiln to be calcined and finally falls into a cooler from the kiln head to be cooled into a finished product.
Fossil fuels, which are non-renewable energy sources, have been exploited in large quantities to become depleted and are being replaced in the long run. At the same time, the use of fossil fuels for lime production is increasingly restricted by the dual carbon policy. Therefore, it is urgently needed to develop a device for producing lime by using renewable energy.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an utilize equipment of alternative fuel production lime, simple structure, economic environmental protection, production effect is good.
In order to achieve the above object, the utility model adopts the following technical scheme: a device for producing lime by using alternative fuel comprises a preheater bin, a preheater, a rotary kiln, a cooler, a hot blast stove and a burner, wherein a feed inlet above the preheater is communicated with a feed outlet of the preheater bin; the hot blast stove is arranged on the outer side of the preheater and blows hot air into the preheater from the upper part of the preheater through a high-temperature fan; the combustor is arranged on the outer side of the end part of the rotary kiln close to the kiln head and used for providing a heat source for the rotary kiln, and the combustor is provided with a substitute fuel feeding pipe and an air inlet pipe communicated with the outlet of the Roots blower.
Further, the preheater feed bin and the preheater are arranged at an upper interval and a lower interval, and the preheater feed bin and the preheater are communicated through a plurality of discharging elephant trunks for uniformly feeding materials into a preheating chamber of the preheater.
Further, the high-temperature fan is a blower with a variable frequency motor.
Further, a discharge port of the preheater is communicated with the kiln tail of the rotary kiln through a conveying pipeline inclined downwards.
Further, the lower part of preheater is funnel-shaped structure, and the bottom bin outlet of this funnel-shaped structure with pipeline top intercommunication.
Furthermore, a conical hot air duct with a small upper part and a large lower part is arranged in the preheating chamber of the preheater, and an air outlet of the high-temperature fan is communicated with the upper part of the conical hot air duct.
Further, an exhaust port is arranged at the upper part of the preheater.
Technical scheme more than adopting, the utility model discloses following beneficial effect can be reached:
1. the equipment can adopt alternative fuel to participate in combustion in two parts, wherein one part of straws, waste tires and the like are crushed into fine particles to replace part of coal powder to be sprayed into a rotary kiln from a kiln head combustor for combustion, and the other part of straws, waste tires and the like are combusted in a hot air furnace outside the kiln, and then hot air is introduced into a preheater by a high-temperature fan. By adopting the equipment, the consumption of non-renewable energy sources such as coal powder, natural gas, coke oven gas and the like can be reduced, and the energy crisis is relieved.
2. Be equipped with the hot-blast way of toper in the preheater, the lime stone raw materials is located the hot-blast way periphery of toper, and the hot-blast way can communicate with high temperature fan export and rotary kiln, and the hot-blast room of preheating that gets into the preheater simultaneously of the high-temperature gas in the rotary kiln of being convenient for and high temperature fan introduction realizes abundant preheating process through the heat exchange.
3. The high-temperature fan is a variable-frequency fan, and the rotating speed of the fan can be adjusted according to the type of fuel and the grade of raw materials to control the amount of hot air entering the preheater, so that the product quality is more controllable.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present application.
In the figure: 1. a preheater bin; 2. a preheater; 3. a rotary kiln; 4. a hot blast stove; 5. a high temperature fan; 6. a burner; 7. a cooler; 8. roots blower.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the achievable purpose. Meanwhile, the directions or positional relationships referred to in the present specification, such as "upper", "lower", "left", "right", and the like, are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of operations, but do not indicate or imply that the referred devices or elements must have a specific direction, be constructed in a specific direction, and be operated, and therefore, the present application is not limited thereto, and changes or adjustments of the relative relationships thereof are considered to be within the scope of the present application without substantial technical changes.
The application provides a device for producing lime by using alternative fuel, which mainly comprises a preheater bin 1, a preheater 2, a rotary kiln 3, a cooler 7, a hot blast stove 4 and a combustor 6, as shown in figure 1.
The preheater bunker 1 is used for conveying a raw limestone material to the preheater 2, and the preheater 2 is used for preheating the raw limestone material and feeding the preheated raw limestone material into the rotary kiln. The feed inlet is arranged above the preheater 2 and is communicated with the feed outlet of the preheater bin 1. Specifically, preheater feed bin 1 and preheater 2 interval from top to bottom set up, through a plurality of unloading elephant trunks intercommunication between preheater feed bin 1 and the preheater 2, be convenient for to the indoor even pay-off of preheating of preheater 2.
In specific implementation, in order to improve the preheating effect, a conical hot air duct with a small upper part and a large lower part is arranged in a preheating chamber of the preheater 2, and the limestone raw material is positioned at the periphery of the conical hot air duct. The lower part of the preheater 2 is arranged into a funnel-shaped structure, a discharge port at the bottom of the funnel-shaped structure is connected with a conveying pipeline which inclines downwards, and the limestone raw material which is subjected to preheating treatment is conveyed into the kiln tail of the rotary kiln through the funnel-shaped structure and the conveying pipeline in sequence. A kiln head discharge port of the rotary kiln 3 is connected with a cooler 7, and the cooler 7 is used for cooling calcined lime and discharging finished lime.
The hot blast stove 4 is arranged on the outer side of the preheater 2 and is used for introducing hot blast into the preheater 2; the combustor 6 is arranged on the outer side of the end part of the kiln head of the rotary kiln and used for supplying heat to limestone in the rotary kiln 3.
Specifically, the hot blast stove 4 blows hot air into the preheater 2 from above the preheater 2 through a high-temperature fan 5; the air outlet of the high-temperature fan 5 is communicated with the upper part of the conical hot air channel to form hot air flow with a downward direction, and at the moment, high-temperature gas from the rotary kiln forms hot air flow with an upward direction, so that the limestone raw material is fully preheated through heat exchange. And an exhaust port is formed in the upper part of the preheater 2, and gas is exhausted from the exhaust port after the preheating process is finished.
Preferably, the high temperature fan 5 is a blower with a variable frequency motor, and the rotating speed of the fan can be adjusted according to the type of fuel and the grade of raw materials to control the amount of hot air entering the preheater, so that the product quality is more controllable.
Furthermore, the combustor 6 is provided with a substitute fuel feeding pipe and an air inlet pipe communicated with the outlet of the Roots blower 8. Straw, waste tires and the like are crushed into fine particles to replace part of coal powder and are sent into the combustor 6 from the alternative fuel feeding pipe, and the Roots blower 8 is used for adjusting air flow and pressure. Certainly, a pulverized coal channel can be arranged on the shell of the burner 6 to replace fuel and pulverized coal to be used as fuel of the burner, and a nozzle of the burner 6 extends into the kiln head of the rotary kiln 3 to heat materials in the rotary kiln 3.
In the specific working process, the limestone raw materials are conveyed into the preheater bin 1 through conveying equipment, and the raw materials in the preheater bin 1 are uniformly distributed into the preheater 2 through a plurality of discharging elephant trunks. The substitute fuel is divided into two parts to participate in combustion, one part of straws, waste tires and the like are crushed into fine particles to replace part of coal powder to be sprayed into the rotary kiln 3 from the kiln head combustor 6 for combustion, and the Roots blower 8 adjusts the flame length. After the other part of the waste gas is combusted in a hot air furnace 4 outside the kiln, hot air is introduced into the preheater 2 through a variable-frequency high-temperature fan 5. One part of heat sources required by the pre-decomposition of the raw materials in the preheater 2 comes from the rotary kiln 3, and the other part comes from the hot blast stove 4. The pre-decomposed material enters a rotary kiln 3 for calcination and then falls into a cooler 7 from the kiln head for cooling.
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 described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. An equipment for producing lime by using alternative fuel is characterized in that: comprises a preheater bin (1), a preheater (2), a rotary kiln (3), a cooler (7), a hot blast stove (4) and a burner (6);
a feed inlet above the preheater (2) is communicated with a feed outlet of the preheater bin (1), a discharge outlet below the preheater (2) is communicated with a kiln tail of the rotary kiln (3), a kiln head discharge outlet of the rotary kiln (3) is connected with a cooler (7), and the cooler (7) is used for cooling calcined lime;
the hot blast stove (4) is arranged on the outer side of the preheater (2), and the hot blast stove (4) blows hot air into the preheater (2) from the upper part of the preheater (2) through a high-temperature fan (5);
the burner (6) is arranged on the outer side of the end part of the rotary kiln (3) close to the kiln head and used for providing a heat source for the rotary kiln (3), and the burner (6) is provided with a substitute fuel feeding pipe and an air inlet pipe communicated with the outlet of the Roots blower (8).
2. The apparatus for producing lime using alternative fuel according to claim 1, wherein: the preheater storage bin (1) and the preheater (2) are arranged at an upper and lower interval, and the preheater storage bin (1) and the preheater (2) are communicated through a plurality of blanking slide pipes and used for uniformly feeding materials into a preheating chamber of the preheater (2).
3. The apparatus for producing lime using alternative fuel according to claim 1, wherein: the high-temperature fan (5) is an air blower with a variable frequency motor.
4. The apparatus for producing lime using alternative fuel according to claim 1, wherein: and an exhaust port is formed in the upper part of the preheater (2).
5. The apparatus for producing lime using alternative fuel according to claim 1, wherein: the discharge port of the preheater (2) is communicated with the kiln tail of the rotary kiln (3) through a conveying pipeline inclined downwards.
6. The apparatus for producing lime using alternative fuel according to claim 5, wherein: the lower part of the preheater (2) is of a funnel-shaped structure, and a discharge port at the bottom of the funnel-shaped structure is communicated with the top of the conveying pipeline.
7. The apparatus for producing lime using alternative fuel according to claim 1, wherein: a conical hot air channel with a small upper part and a large lower part is arranged in a preheating chamber of the preheater (2), and an air outlet of the high-temperature fan (5) is communicated with the upper part of the conical hot air channel.
CN202220525806.2U 2022-03-11 2022-03-11 Equipment for producing lime by using alternative fuel Active CN217202540U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220525806.2U CN217202540U (en) 2022-03-11 2022-03-11 Equipment for producing lime by using alternative fuel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220525806.2U CN217202540U (en) 2022-03-11 2022-03-11 Equipment for producing lime by using alternative fuel

Publications (1)

Publication Number Publication Date
CN217202540U true CN217202540U (en) 2022-08-16

Family

ID=82755999

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220525806.2U Active CN217202540U (en) 2022-03-11 2022-03-11 Equipment for producing lime by using alternative fuel

Country Status (1)

Country Link
CN (1) CN217202540U (en)

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