CN-121974583-A - Calcination system

Abstract

The calcination system comprises a first dry material conveying device, a rotary kiln, a second dry material conveying device, a calciner, a third dry material conveying device, a cooler, a fourth dry material conveying device and a storage bin, wherein the multifunctional device comprises a first air path, a first fan and a heat exchanger, the heat exchanger is provided with a heat exchange water path and a heat exchange air path, the first air path passes through the cooler and is communicated with the heat exchange air path, the heat supply device comprises a first water path, a flash tank, a second water path, a third water path and a fourth water path, the first water path passes through the calciner, the outlet of the first water path is communicated with the inlet of the flash tank, the vapor outlet of the flash tank is communicated with the inlet of the second water path, the second water path passes through the downstream section of the rotary kiln, the outlet of the second water path is communicated with the inlet of the heat exchange water path, the outlet of the flash tank is communicated with the inlet of the heat exchange water path through the third water path, the outlet of the heat exchange water path is communicated with the inlet of the fourth water path, and the fourth water path passes through the upstream section of the rotary kiln. The calcining system has lower energy consumption.

Inventors

• HOU ZHIGANG
• ZHANG YUFEI

Assignees

• 北新集团建材股份有限公司

Dates

Publication Date

20260505

Application Date

20260116

Claims (11)

1. 1. A calcination system, comprising: The device comprises a first dry material conveying device, a rotary kiln, a second dry material conveying device, a calciner, a third dry material conveying device, a cooler, a fourth dry material conveying device and a storage bin, wherein the first dry material conveying device is arranged to feed to an inlet of the rotary kiln, the second dry material conveying device is arranged to receive materials from an outlet of the rotary kiln and feed to an inlet of the calciner, the third dry material conveying device is arranged to receive materials from an outlet of the calciner and feed to an inlet of the cooler, and the fourth dry material conveying device is arranged to receive materials from an outlet of the cooler and feed to the storage bin; the multifunctional device comprises a first air passage, a first fan and a heat exchanger, wherein the heat exchanger is provided with a heat exchange water passage and a heat exchange air passage, the first air passage passes through the cooler and is communicated with the heat exchange air passage, and the first fan is arranged to form an air beam blown from the first air passage to the heat exchange air passage; The heat supply device comprises a first waterway, a flash tank, a second waterway, a third waterway and a fourth waterway, wherein the first waterway passes through the calciner, the outlet of the first waterway is communicated with the inlet of the flash tank, the vapor outlet of the flash tank is communicated with the inlet of the second waterway, the second waterway passes through the downstream section of the rotary kiln, the outlet of the second waterway is communicated with the inlet of the heat exchange waterway, the water outlet of the flash tank passes through the third waterway and is communicated with the inlet of the heat exchange waterway, the outlet of the heat exchange waterway is communicated with the inlet of the fourth waterway, and the fourth waterway passes through the upstream section of the rotary kiln.
2. 2. The calcination system according to claim 1, wherein the heating means further comprises: and the outlet of the condensed water tank is communicated with the inlet of the flash tank.
3. 3. The calcination system of claim 1, wherein the first dry material delivery device comprises a feeder, the multifunctional device further comprises a first dehumidification air path, an inlet of the first dehumidification air path is communicated with an outlet of the heat exchange air path, an outlet of the first dehumidification air path is communicated with the interior of the feeder, and an outlet of the feeder is in sealed communication with an inlet of the rotary kiln.
4. 4. A calcination system according to claim 3 wherein the second dry material conveying means comprises a first conveyor, a second conveyor and a first elevator, the inlet of the first conveyor being arranged to receive material from the outlet of the rotary kiln, feed the inlet of the calciner and the inlet of the second conveyor, the outlet of the second conveyor being arranged to feed the inlet of the first elevator, the outlet of the first elevator being arranged to feed the inlet of the feeder, the multifunctional means further comprising a second dehumidification air duct, the inlet of the second dehumidification air duct being in communication with the outlet of the heat exchange air duct, the outlet being in communication with the interior of the second conveyor.
5. 5. The calcination system of claim 4, further comprising: And the dust collection device is at least arranged for collecting dust of the rotary kiln, the second conveyor, the calciner and the cooler.
6. 6. The calcination system according to claim 4, wherein the second dry material transporting device further comprises a first star discharger, a second lifter, a pneumatic three-way valve, an intermediate bin, a second star discharger, a rotary screen, a third conveyor and a waste bin, a first outlet of the first conveyor being arranged to feed the inlet of the second lifter, a second outlet of the first conveyor being arranged to feed the inlet of the second conveyor through the first star discharger, an outlet of the second lifter being arranged to feed the inlet of the pneumatic three-way valve, a first outlet of the pneumatic three-way valve being arranged to feed the inlet of the intermediate bin, an outlet of the intermediate bin being arranged to feed the inlet of the second conveyor through the second star discharger, a second outlet of the pneumatic three-way valve being arranged to feed the inlet of the rotary screen, an outlet of the rotary screen being arranged to feed the inlet of the third conveyor, and a waste bin being arranged to discharge the waste material.
7. 7. A calcination system according to claim 3, wherein the first dry material transporting device further comprises a desulphurized gypsum hopper, a belt scale, a first belt conveyor provided with an iron remover, a roller screen, a second belt conveyor and a wind-locking discharger arranged in this order, the wind-locking discharger being arranged to feed the inlet of the feeder.
8. 8. The calcination system of any one of claims 1 to 7, further comprising: The fluidization air supply device comprises a second fan, a second air passage and a plurality of fluidization air passages, wherein the calciner is provided with a plurality of calcination cavities which are communicated in sequence, the second air passage passes through the cooler, the inlets of the fluidization air passages are communicated with the outlets of the second air passage, the outlets of the fluidization air passages are communicated with the interiors of the calcination cavities in a one-to-one correspondence manner, and the second fan is arranged to form air bundles which are blown from the second air passage to the fluidization air passages.
9. 9. The calcination system according to claim 8, wherein the cooler has a high temperature cooling zone, a medium temperature cooling zone, and a low temperature cooling zone, the second air passage is a second air duct passing through the high temperature cooling zone, and the first air passage is a first air duct passing through the medium temperature cooling zone, the calcination system further comprising: The first cooling device comprises a third fan and a third air passage, the third air passage is a third air pipe passing through the low-temperature cooling area, the third fan is connected with the third air pipe, and The second cooling device comprises a fourth fan, the fourth fan is communicated with the interior of the cooler and is arranged to enable the materials in the cooler to generate fluidization movement.
10. 10. The calcination system according to any one of claims 1 to 7, wherein the third dry material conveying device comprises a fourth conveyor arranged to receive material from an outlet of the calciner and to feed material to an inlet of the third elevator, and a third elevator, the outlet of the third elevator being arranged to feed material to an inlet of the cooler.
11. 11. The calcination system according to any one of claims 1 to 7, wherein the fourth dry material transporting device comprises a third star discharger, a ball mill, a fifth conveyor and a fourth elevator, the outlet of the cooler being arranged to feed the inlet of the ball mill through the third star discharger, the fifth conveyor being arranged to receive material from the outlet of the ball mill, to feed the inlet of the fourth elevator, the outlet of the fourth elevator being arranged to feed the storage bin.

Description

Calcination system Technical Field The invention relates to the technical field of gypsum board production, in particular to a calcining system. Background In the process of calcining gypsum, coal-fired furnaces are becoming smaller and smaller with the increasing environmental requirements. An alternative is to use natural gas as a heat source, but the calcining cost is higher, and another alternative is to use high-temperature steam as a heat source, so that the calcining cost is lower and the application is wider. For the technical proposal of adopting high-temperature steam as a heat source, how to better reduce energy consumption and improve energy utilization rate is also a technical problem which is solved by the technical staff in the field. Disclosure of Invention The embodiment of the application provides a calcination system, which comprises a first dry material conveying device, a rotary kiln, a second dry material conveying device, a calciner, a third dry material conveying device, a cooler, a fourth dry material conveying device and a storage bin, wherein the first dry material conveying device is used for feeding materials to an inlet of the rotary kiln, the second dry material conveying device is used for receiving materials from an outlet of the rotary kiln and feeding materials to an inlet of the calciner, the third dry material conveying device is used for receiving materials from an outlet of the calciner and feeding materials to an inlet of the cooler, and the fourth dry material conveying device is used for receiving materials from an outlet of the cooler and feeding materials to the storage bin; the multifunctional device comprises a first air passage, a first fan and a heat exchanger, wherein the heat exchanger is provided with a heat exchange water passage and a heat exchange air passage, the first air passage passes through the cooler and is communicated with the heat exchange air passage, the first fan is arranged to form an air beam blown from the first air passage to the heat exchange air passage, the heat supply device comprises a first water passage, a flash tank, a second water passage, a third water passage and a fourth water passage, the first water passage passes through the calciner, the outlet of the first water passage is communicated with the inlet of the flash tank, the vapor outlet of the flash tank is communicated with the inlet of the second water passage, the second water passage passes through the downstream section of the rotary kiln, the outlet of the second water passage is communicated with the inlet of the heat exchange water passage, the water outlet of the flash tank is communicated with the inlet of the heat exchange water passage through the third water passage, the outlet of the heat exchange water passage is communicated with the inlet of the fourth water passage, the fourth waterway passes through an upstream section of the rotary kiln. In some exemplary embodiments, the heating apparatus further comprises a condensate tank, an outlet of the first waterway being in communication with an inlet of the condensate tank, an outlet of the condensate tank being in communication with an inlet of the flash tank. In some exemplary embodiments, the first dry material conveying device comprises a feeder, the multifunctional device further comprises a first dehumidification air path, an inlet of the first dehumidification air path is communicated with an outlet of the heat exchange air path, an outlet of the first dehumidification air path is communicated with the interior of the feeder, and an outlet of the feeder is communicated with an inlet of the rotary kiln in a sealing manner. In some exemplary embodiments, the second dry material conveying device comprises a first conveyor, a second conveyor, and a first elevator, wherein an inlet of the first conveyor is configured to receive material from an outlet of the rotary kiln, to feed material to an inlet of the calciner and an inlet of the second conveyor, an outlet of the second conveyor is configured to feed material to an inlet of the first elevator, an outlet of the first elevator is configured to feed material to an inlet of the feeder, and the multifunctional device further comprises a second dehumidification wind path, an inlet of the second dehumidification wind path is in communication with an outlet of the heat exchange wind path, and an outlet is in communication with an interior of the second conveyor. In some exemplary embodiments, the calcination system further includes a dust collection device configured to collect dust from at least the rotary kiln, the second conveyor, the calciner, and the cooler. In some exemplary embodiments, the second dry material conveying apparatus further comprises a first star discharger, a second lifter, a pneumatic three-way valve, an intermediate bin, a second star discharger, a rotary screen, a third conveyor, and a waste bin, the first outlet of the first conveyor