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Horizontal continuous crystal transformation device, system and method for preparing high-strength gypsum

A technology of high-strength gypsum and crystal transformation, applied in the direction of climate sustainability, sustainable manufacturing/processing, chemical industry, etc., can solve the problems of non-compliance with the development requirements of green environmental protection, continuous production, low production efficiency, high energy consumption, etc. , to achieve good drying and water removal effects, reduce manpower, and shorten the material flow

Active Publication Date: 2022-07-12
SHANDONG TIANLI DRYING TECH & EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The autoclave method is a common process for preparing α-hemihydrate gypsum from the by-product soft gypsum in industry. The autoclave method is to carry out the crystallization and drying process in the crystallization kiln. Two operations are required in the same equipment, and the separate process time As long as 5-8 hours, the crystallization and drying operations need to be stopped and waited, which is not conducive to the continuous production of industrial production, and the production efficiency is extremely low. The crystal conversion equipment and drying equipment need to provide long-term heat separately, and the process consumes a lot of energy. , A large amount of heat energy in the exhaust gas is discharged and wasted, which does not meet the development requirements of green environmental protection

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  • Horizontal continuous crystal transformation device, system and method for preparing high-strength gypsum

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Effect test

Embodiment 1

[0037] In one or more embodiments, a horizontal continuous crystallizing device for preparing high-strength gypsum is disclosed, combined with figure 1 , which specifically includes: a horizontal crystal retort 4, the two ends of the horizontal crystal retort 4 are respectively connected to the feed conveying screw 3 and the screw guide device 10 through the high-pressure dynamic and static seals 12, and the feed port of the feed conveying screw 3 and the screw The discharge ports of the material guiding device 10 are respectively connected to the pressure-maintaining discharge valves 2; in this embodiment, the internal pressure of the horizontal crystal bowl 4 is always maintained at 0.3MPA-0.6MPA, and the pressure-holding discharge valve 2 can The internal pressure of the crystal barrel 4 is kept at the same time so that the material feeding does not release pressure; the high-pressure dynamic and static seal 12 mainly plays the role of sealing and maintaining pressure.

[003...

Embodiment 2

[0049] In one or more embodiments, a system for producing high-strength gypsum is disclosed, incorporating figure 1 , which specifically includes: a feeding bin 1, the horizontal continuous crystallizing device described in the first embodiment, a waste gas treatment unit, a flash drying unit and a bag filter unit; wherein, the feeding bin 1 is connected to the horizontal continuous crystallizing device. , The material output of the horizontal continuous crystallizing device is connected to the flash drying unit, the tail gas output of the flash drying unit is connected to the bag filter unit; the waste gas output of the horizontal continuous crystallizing device is connected to the exhaust gas treatment unit.

[0050] In this embodiment, the waste gas treatment unit adopts a washing tower 13 , and the washing tower 13 mainly includes a tower body, a sealing box 14 , a sprinkling main pipe 15 and nozzles 16 , a water pump 17 and a sewage outlet 18 . The nozzle 16 and the seali...

Embodiment 3

[0054] In one or more embodiments, a method for preparing high-strength gypsum is disclosed, which specifically includes the following processes:

[0055] (1) Put a certain amount of ordinary gypsum (β gypsum) at room temperature (CaSO with a general water content of about 15%) 4 -2H 2 (0, and part of the crystallizer) is put into the feeding bin 1 to make it evenly fed, and the pressure-retaining discharge valve 2 is acted upon by gravity to reach the feeding conveying screw 3, and the feeding and conveying screw 3 contains conveying blades, The blades can clean each other, thus preventing the gypsum from sticking to the feed screw wall.

[0056] (2) The ordinary gypsum conveyed by the feeding screw will enter the horizontal crystal retort 4. The pressure maintaining and discharge valves 2 on both sides of the horizontal crystal retort 4 maintain the internal pressure of the crystal revolver, and at the same time prevent the material from being fed. Depressurize. The inter...

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Abstract

The invention discloses a horizontal continuous crystal transformation device, system and method for preparing high-strength gypsum, and the device comprises a horizontal crystal transformation cylinder, and the two ends of the horizontal crystal transformation cylinder are respectively connected with a feed conveying screw and a spiral guide device through high-pressure dynamic and static seals. A feed port of the feed conveying screw and a discharge port of the spiral guide device are respectively connected with a pressure-maintaining discharge valve; a spiral steam pipe is arranged in the horizontal crystal transformation cylinder, and the materials can be subjected to crystal phase transformation under the conditions of continuous feeding and discharging of the materials and pressure maintaining by controlling the steam temperature. Through the pressure-maintaining discharge valve and the high-pressure dynamic and static seal, the barrel can enable materials to continuously enter and exit while the materials are subjected to crystal transformation.

Description

technical field [0001] The invention relates to the technical field of gypsum preparation, in particular to a horizontal continuous crystallizing device, system and method for preparing high-strength gypsum. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Gypsum is not only widely used in the construction industry, but also an important raw material in modern industry. Generally speaking, gypsum can generally refer to two minerals, soft gypsum and anhydrite. Soft gypsum refers to calcium sulfate dihydrate (CaSO 4 -2H 2 O), also known as dihydrate gypsum, water gypsum, the theoretical composition is CaO-32.6%, SO 3 -46.5%, H 2 O + -20.9%, monoclinic, the crystals are plate-like, usually dense block or fibrous, white or gray, reddish-brown, glass or silk luster, Mohs hardness of 2; anhydrite is anhydrous calcium sulfate (CaSO 4 ), t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B11/032
CPCC04B11/032Y02P20/10
Inventor 邢召良刘峰孙云兴马胜利徐迎军张肖肖窦禹兵
Owner SHANDONG TIANLI DRYING TECH & EQUIP
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