CN216946223U - Production line for preparing sulfuric acid from desulfurized gypsum waste residues - Google Patents
Production line for preparing sulfuric acid from desulfurized gypsum waste residues Download PDFInfo
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- CN216946223U CN216946223U CN202123431840.8U CN202123431840U CN216946223U CN 216946223 U CN216946223 U CN 216946223U CN 202123431840 U CN202123431840 U CN 202123431840U CN 216946223 U CN216946223 U CN 216946223U
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Abstract
The utility model discloses a production line for preparing sulfuric acid from desulfurized gypsum waste residue, wherein: comprises a homogenizing chamber, a dewatering pipeline, a hot air device, a cyclone, a four-stage preheater and a rotary kiln; the outlet of the homogenizing silo is communicated and connected with the dewatering pipeline through a hoisting machine; the dewatering pipeline is vertically arranged, a hot air device is assembled and connected below the dewatering pipeline, and the upper part of the dewatering pipeline is communicated and connected with a feeding port of the cyclone cylinder; the discharge port of the cyclone cylinder is connected with a four-stage preheater; the discharge hole of the four-stage preheater is communicated and connected with the kiln tail of the rotary kiln; the kiln tail of the rotary kiln passes through the inner cavity of the four-stage preheater through a gas pipeline and then is communicated and connected with the feeding port of the electric dust remover, and an air heat exchanger is connected on the gas pipeline between the four-stage preheater and the electric dust remover. The utility model has the beneficial effects that: reasonable layout and high production efficiency, can consume a large amount of desulfurized gypsum waste residue, protects the environment, can comprehensively utilize resources, and generates a large amount of economic and social benefits.
Description
Technical Field
The utility model relates to the field of chemical industry, in particular to a production line for preparing sulfuric acid from desulfurized gypsum waste residue.
Background
At present, sulfuric acid produced by general domestic sulfuric acid is mainly prepared from pyrite, sulfur and phosphogypsum, and about electrolytic manganese metal production enterprises, the annual sulfuric acid consumption is about 160 ten thousand tons, a gypsum sulfuric acid production line is often built according to the industrial requirements of companies, a large amount of natural gypsum is consumed, and a large amount of desulfurized gypsum waste residue is also generated. The amount of the desulfurized gypsum waste residue treatment mode is only about 20 percent in the aspect of industrial treatment, and the main treatment methods are all landfills or stacks in solid waste residue fields, so that a large amount of land is occupied, and underground water pollution is caused.
Disclosure of Invention
The utility model aims to provide the production line for preparing the sulfuric acid by using the desulfurized gypsum waste residue, which has reasonable layout and high production efficiency, can consume a large amount of desulfurized gypsum waste residue, protects the environment, can comprehensively utilize resources and generates a large amount of economic and social benefits.
The utility model is realized by the following technical scheme:
the utility model relates to a production line for preparing sulfuric acid from desulfurized gypsum waste residue, which comprises the following steps: comprises a homogenizing chamber, a dewatering pipeline, a hot air device, a cyclone, a four-stage preheater and a rotary kiln; the outlet of the homogenizing silo is communicated and connected with the dewatering pipeline through a hoisting machine; the dewatering pipeline is vertically arranged, a hot air device is assembled and connected below the dewatering pipeline, and the upper part of the dewatering pipeline is communicated and connected with a feeding port of the cyclone cylinder; the discharge port of the cyclone cylinder is connected with a four-stage preheater; the discharge hole of the four-stage preheater is communicated and connected with the kiln tail of the rotary kiln; the kiln tail of the rotary kiln passes through the inner cavity of the four-stage preheater through a gas pipeline and then is communicated and connected with the feeding port of the electric dust remover, and an air heat exchanger is connected on the gas pipeline between the four-stage preheater and the electric dust remover.
The production line for preparing sulfuric acid from the desulfurized gypsum waste residue comprises: desulfurized gypsum waste residue is put into a feed inlet of the homogenizing silo; a conveying belt and a metering scale are assembled and connected between the discharge port of the homogenizing silo and the elevator.
The production line for preparing sulfuric acid from the desulfurized gypsum waste residue comprises: the hot air device comprises a hot air furnace, a raw coal bin and a ring hammer crusher, an air outlet of the hot air furnace is communicated and connected with the lower end of the dewatering pipeline, a feeding port of the raw coal bin is connected with a hoister for the ring hammer crusher, and a discharging port is connected with a conveying belt for the hot air furnace.
The production line for preparing sulfuric acid from the desulfurized gypsum waste residue comprises: the four-stage preheater comprises a first preheating bin, a second preheating bin, a third preheating bin and a fourth preheating bin, and an air pipeline is used for connecting an internal cavity of one preheating bin with an air heat exchanger after the fourth preheating bin, the third preheating bin, the second preheating bin and the first preheating bin are sequentially communicated from the rotary kiln; the discharge port of the cyclone cylinder is connected with a gas pipeline between the first preheating bin and the second preheating bin, the discharge port of the first preheating bin is connected with a gas pipeline between the second preheating bin and the third preheating bin, the discharge port of the second preheating bin is connected with a gas pipeline between the third preheating bin and the fourth preheating bin, and the discharge ports of the third preheating bin and the fourth preheating bin are respectively communicated and connected with the kiln tail of the rotary kiln.
The production line for preparing sulfuric acid from the desulfurized gypsum waste residue comprises: the kiln head of the rotary kiln is provided with a grate cooler.
The production line for preparing sulfuric acid from the desulfurized gypsum waste residue comprises: the air heat exchanger comprises a heat exchange cylinder, a fan and a dust collecting bottom bin, a gas pipeline is communicated and connected with the heat exchange cylinder, the fan is arranged on the side surface of the heat exchange cylinder, the lower end of the heat exchange cylinder is fixedly connected with the dust collecting bottom bin, and the dust collecting bottom bin is communicated and connected with the kiln dust bin through a conveying belt; the dust discharging port of the electric dust collector is communicated and connected with the kiln dust bin through a conveying belt.
The production line for preparing sulfuric acid from the desulfurized gypsum waste residue comprises: the feeding port of the kiln dust bin is respectively connected with the air heat exchanger and the electric dust remover, and the outlet of the kiln dust bin is connected with the feeding port of the hoister through the transmission device.
The production line for preparing sulfuric acid from the desulfurized gypsum waste residue comprises: the outlet of the electric dust collector is connected with the working section for producing the sulfuric acid by the sulfur dioxide conversion process.
The utility model has the beneficial effects that: reasonable layout and high production efficiency, can consume a large amount of desulfurized gypsum waste residue, protects the environment, can comprehensively utilize resources, and generates a large amount of economic and social benefits.
Drawings
FIG. 1: the structure of the utility model is connected with the schematic diagram;
in the figure: 1-homogenizing chamber, 2-elevator, 3-dewatering pipe, 4-hot air device, 5-cyclone, 6-four-stage preheater, 7-rotary kiln, 8-gas pipe, 9-air heat exchanger, 10-kiln dust bin and 11-electric dust remover.
Detailed Description
The utility model is further described with reference to the following figures and detailed description:
example (b): as shown in fig. 1, a production line for preparing sulfuric acid from desulfurized gypsum waste residue, wherein: comprises a homogenizing chamber 1, a dewatering pipeline 3, a hot air device 4, a cyclone 5, a four-stage preheater 6 and a rotary kiln 7; the outlet of the homogenizing chamber 1 is communicated with a dewatering pipeline 3 through a hoisting machine 2; the dewatering pipeline 3 is vertically arranged, a hot air device 4 is assembled and connected below the dewatering pipeline, and the upper part of the dewatering pipeline is communicated and connected with a feeding port of the cyclone 5; the discharge port of the cyclone 5 is connected with a four-stage preheater 6; the discharge hole of the four-stage preheater 6 is communicated and connected with the kiln tail of the rotary kiln 7; the kiln tail of rotary kiln 7 passes through the inside cavity of level four preheater 6 through gas pipeline 8 and is connected with the pan feeding mouth intercommunication of electrostatic precipitator 11, and is connected with air heat exchanger 9 on the gas pipeline 8 between level four preheater 6 and the electrostatic precipitator 11.
Desulfurized gypsum waste residue is put into a feed inlet of the homogenizing silo 1; a conveying belt and a metering scale are assembled and connected between the discharge port of the homogenizing silo 1 and the elevator 2; the hot air device 4 comprises a hot air furnace, a raw coal bin and a ring hammer crusher, an air outlet of the hot air furnace is communicated and connected with the lower end of the dewatering pipeline 3, a feeding port of the raw coal bin is connected with a hoister for the ring hammer crusher, and a discharging port is connected with a conveying belt for the hot air furnace; wherein: the four-stage preheater 8 comprises a first preheating bin, a second preheating bin, a third preheating bin and a fourth preheating bin, and after the fourth preheating bin, the third preheating bin, the second preheating bin and the first preheating bin are sequentially communicated from the rotary kiln 7 through the gas pipeline 7, an internal cavity of one preheating bin is connected with the air heat exchanger 9; a discharge port of the cyclone 5 is connected with a gas pipeline 8 between the first preheating bin and the second preheating bin, a discharge port of the first preheating bin is connected with a gas pipeline 8 between the second preheating bin and the third preheating bin, a discharge port of the second preheating bin is connected with a gas pipeline 8 between the third preheating bin and the fourth preheating bin, and discharge ports of the third preheating bin and the fourth preheating bin are respectively communicated and connected with the kiln tail of the rotary kiln 7; the kiln head of the rotary kiln 7 is provided with a grate cooler; the air heat exchanger 9 comprises a heat exchange cylinder, a fan and a dust collection bottom bin, a gas pipeline 8 is communicated and connected with the heat exchange cylinder, the fan is arranged on the side surface of the heat exchange cylinder, the lower end of the heat exchange cylinder is fixedly connected with the dust collection bottom bin, and the dust collection bottom bin is communicated and connected with the kiln dust bin 10 through a conveyor belt; the dust discharging port of the electric dust collector 11 is communicated and connected with the kiln dust bin 10 through a conveying belt; the feed inlet of the kiln dust bin 10 is respectively connected with the air heat exchanger 9 and the electric dust remover 11, and the outlet is connected with the feed inlet of the elevator 2 through a transmission device. The outlet of the electric dust collector 11 is connected with the working section for producing the sulfuric acid by the sulfur dioxide conversion process.
When in work: after the desulfurized gypsum waste residue is dried, taking materials from coke, manganese residue and silica sand in an auxiliary material combined shed by a material taking machine, conveying the materials to a raw material blending warehouse through a belt conveyor to wait for blending, conveying the materials to a raw material mill to grind and remove physical water after blending, then conveying the materials to a homogenizing warehouse 1 to homogenize, conveying the homogenized raw materials to a dewatering pipeline 3 after metering by a metering scale, removing crystal water in the raw materials, directly entering a four-stage preheater 6 through a cyclone 5 to preheat, then entering a rotary kiln 7 to decompose and calcine, cooling the waste residue generated in the rotary kiln 7 to 60-80 ℃ through a grate cooler, and then warehousing; the sulfur-containing gas generated by the calcination of the rotary kiln 7 enters a section for producing sulfuric acid by a sulfur dioxide conversion process after passing through a four-stage preheater 6, an air heat exchanger 9 and an electric dust remover 11 by a gas pipeline 8; the section of the sulfur dioxide conversion process for producing sulfuric acid is specifically as follows: the acid making purification system carries out washing, 98 percent of absorption rate is completed through two-conversion and two-absorption to generate sulfuric acid, and the residual tail gas is treated by hydrogen peroxide (27.5 percent) in an empty tower to reach the standard and is discharged after demisting treatment of a fiber demister.
Wherein: the desulfurized gypsum waste residue is dried, the desulfurized gypsum waste residue is dried in a shed after entering a field in consideration of large water content, and then is dried by a pulverized coal hot blast stove, a drying crusher, a cyclone dust collector and a bag type dust collector, and is put in a warehouse after being dried to wait for the blending of raw materials, wherein the blended auxiliary materials are as follows: coke is used as a reducing agent, and the raw materials are corrected by adding a certain proportion of manganese metal waste slag, sulfuric acid slag and silica sand.
Wherein: after entering the dehydration pipeline 3, raw materials are driven by hot air of the hot air device 4 to move upwards to remove water, then enter the cyclone cylinder 5 to move downwards, are dispersed by the spreading plate and then continue to move downwards to enter the four-stage preheater 6 to perform countercurrent contact heat exchange with hot air flow in the gas pipeline 8, and after being heated to 600-700 ℃, the raw materials enter the rotary kiln 7 to be decomposed and calcined; while the hot gas stream in the gas duct 8 is sulphur dioxide gas generated in the rotary kiln 7.
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 or portions thereof without departing from the spirit and scope of the utility model.
Claims (8)
1. The utility model provides a production line of desulfurization gypsum waste residue preparation sulphuric acid which characterized in that: comprises a homogenizing chamber (1), a dewatering pipeline (3), a hot air device (4), a cyclone cylinder (5), a four-stage preheater (6) and a rotary kiln (7); the outlet of the homogenizing silo (1) is communicated and connected with a dewatering pipeline (3) through a lifting machine (2); the dewatering pipeline (3) is vertically arranged, a hot air device (4) is assembled and connected below the dewatering pipeline, and the upper part of the dewatering pipeline is communicated and connected with a feeding port of the cyclone cylinder (5); the discharge port of the cyclone (5) is connected with a four-stage preheater (6); the discharge hole of the four-stage preheater (6) is communicated and connected with the kiln tail of the rotary kiln (7); the kiln tail of rotary kiln (7) passes through the inside cavity of level four preheater (6) through gas pipeline (8) and is connected with the pan feeding mouth intercommunication of electrostatic precipitator (11), and is connected with air heat exchanger (9) on gas pipeline (8) between level four preheater (6) and electrostatic precipitator (11).
2. The production line for preparing sulfuric acid from desulfurized gypsum residue according to claim 1, wherein: desulfurized gypsum waste residues are put into a feed inlet of the homogenizing silo (1); a conveyor belt and a metering scale are connected between the discharge port of the homogenizing silo (1) and the elevator (2) in a matching way.
3. The production line for preparing sulfuric acid from desulfurized gypsum residue according to claim 1, wherein: the hot air device (4) comprises a hot air furnace, a raw coal bin and a ring hammer crusher, an air outlet of the hot air furnace is communicated and connected with the lower end of the dewatering pipeline (3), a feeding port of the raw coal bin is connected with a lifting machine for the ring hammer crusher, and a discharging port is connected with a conveying belt for the hot air furnace.
4. The production line for preparing sulfuric acid from desulfurized gypsum residue according to claim 1, wherein: the four-stage preheater (6) comprises a first preheating bin, a second preheating bin, a third preheating bin and a fourth preheating bin, and the gas pipeline (8) is used for sequentially communicating the fourth preheating bin, the third preheating bin, the second preheating bin and the first preheating bin from the rotary kiln (7) and then connecting an internal cavity of the first preheating bin with the air heat exchanger (9); the discharge port of the cyclone (5) is connected with a gas pipeline (8) between the first preheating bin and the second preheating bin, the discharge port of the first preheating bin is connected with a gas pipeline (8) between the second preheating bin and the third preheating bin, the discharge port of the second preheating bin is connected with a gas pipeline (8) between the third preheating bin and the fourth preheating bin, and the discharge ports of the third preheating bin and the fourth preheating bin are respectively communicated and connected with the kiln tail of the rotary kiln (7).
5. The production line for preparing sulfuric acid from desulfurized gypsum residue according to claim 1, wherein: the kiln head of the rotary kiln (7) is provided with a grate cooler.
6. The production line for preparing sulfuric acid from desulfurized gypsum residue according to claim 1, wherein: the air heat exchanger (9) comprises a heat exchange cylinder, a fan and a dust collecting bottom bin, a gas pipeline (8) is communicated and connected with the heat exchange cylinder, the fan is arranged on the side surface of the heat exchange cylinder, the lower end of the heat exchange cylinder is fixedly connected with the dust collecting bottom bin, and the dust collecting bottom bin is communicated and connected with the kiln dust bin (10) through a conveying belt; and the dust discharge port of the electric dust collector (11) is communicated and connected with the kiln dust bin (10) through a conveying belt.
7. The production line for preparing sulfuric acid from desulfurized gypsum residue according to claim 6, wherein: and a feeding port of the kiln ash bin (10) is respectively connected with the air heat exchanger (9) and the electric dust remover (11), and an outlet of the kiln ash bin is connected with a feeding port of the hoister (2) through a transmission device.
8. The production line for producing sulfuric acid from desulfurized gypsum residue according to any one of claims 1 to 7, wherein: and the outlet of the electric dust collector (11) is connected with a sulfuric acid production workshop section for producing sulfur dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123431840.8U CN216946223U (en) | 2021-12-31 | 2021-12-31 | Production line for preparing sulfuric acid from desulfurized gypsum waste residues |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123431840.8U CN216946223U (en) | 2021-12-31 | 2021-12-31 | Production line for preparing sulfuric acid from desulfurized gypsum waste residues |
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| CN216946223U true CN216946223U (en) | 2022-07-12 |
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| CN202123431840.8U Active CN216946223U (en) | 2021-12-31 | 2021-12-31 | Production line for preparing sulfuric acid from desulfurized gypsum waste residues |
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- 2021-12-31 CN CN202123431840.8U patent/CN216946223U/en active Active
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