CN218523878U

CN218523878U - Dehydration preheating device before sintering Bayer red mud into kiln

Info

Publication number: CN218523878U
Application number: CN202221931875.XU
Authority: CN
Inventors: 乔斌; 陈文胜; 王文煜; 刘晓春; 曾伟兵
Original assignee: CITIC Heavy Industries Co Ltd; Luoyang Mining Machinery and Engineering Design Institute Co Ltd
Current assignee: CITIC Heavy Industries Co Ltd; Luoyang Mining Machinery and Engineering Design Institute Co Ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2023-02-24
Anticipated expiration: 2032-07-26

Abstract

The utility model discloses a Bayer red mud sintering goes into kiln preceding dehydration preheating device, the loach carrying platform comprises a supporting fram, the filter disc is installed to disc filter inner wall, and installs the discharge gate between the filter disc, the conveyer belt is installed to the discharge gate lower extreme, and conveyer belt one side and stoving breaker alternate the intercommunication installation, preheater upper end one side intercommunication has the recovery pipe, and retrieves pipe one end intercommunication and have the air jet, preheater alternates on one side and installs the silo, and silo inner wall alternates there is the second guide auger, the second rotating electrical machines is installed to second guide auger one end. This dehydration preheating device before kiln is gone into in sintering of Bayer red mud can be through disc filter with the red mud dehydration to moisture content below 20% to can scrape the material transportation fast through shovel piece, discharge gate and conveyer belt, and the preheater can carry out heat transfer recycle through the waste gas of retrieving pipe and jet in with the rotary kiln, avoids extravagant, and it is better to preheat the effect.

Description

Dehydration preheating device before sintering Bayer red mud into kiln

Technical Field

The utility model relates to a Bayer red mud sintering technical field specifically is a dehydration preheating device before sintering of Bayer red mud is gone into kiln.

Background

Bayer process red mud is a waste discharged in the Bayer process of producing alumina. Red mud is an industrial waste with high alkali content, certain ratio of aluminum to silicon and large water content. The Bayer process red mud has high water content, and the content of the water still reaches 35-40% after the Bayer process red mud is stored for 28 days. With the mass production of Bayer red mud, the storage site, environmental protection and the like of the red mud are huge problems. In order to effectively utilize the waste, the bayer red mud is added with bauxite, coal powder, alkali, limestone and the like, and then the clinker produced by sintering is used to dissolve out alumina again, so that the aim of utilizing the bayer red mud alkali and aluminum can be achieved. Meanwhile, the alkali content of the red mud discharged by sintering is greatly reduced, and the next utilization is facilitated.

The existing device has two defects that (1) the moisture brought by the raw materials needs to be evaporated by the heat of the rotary kiln, the moisture is also heated to 500-700 ℃, and a large amount of moisture in the red mud consumes a large part of heat energy.

(2) The exhaust temperature of the rotary kiln waste gas is about 500-700 ℃, the sensible heat of the rotary kiln waste gas is not effectively utilized, and energy waste is caused, so that a dehydration preheating device for Bayer red mud before sintering and entering a kiln is needed to solve the problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bayer red mud sintering is gone into dehydration preheating device before kiln to solve the problem that the moisture that the device raw materials that mentions in the above-mentioned background art brought in need consume a large amount of heat energy and the waste gas heat of emission can not utilize.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a Bayer red mud sintering dehydration preheating device before going into kiln, includes the support frame, disc filter is installed to the support frame upper end, and stoving breaker is installed to its disc filter one side, and stoving breaker lower extreme intercommunication has the preheater, the filter disc is installed to the disc filter inner wall, and installs the discharge gate between the filter disc, discharge gate upper end edge fixedly connected with shovel piece, and the discharge gate lower extreme is open structure, the conveyer belt is installed to the discharge gate lower extreme, and conveyer belt one side and stoving breaker interlude intercommunication installation, preheater upper end one side intercommunication has the recovery pipe, and retrieves pipe one end intercommunication and have the air jet, defeated silo is installed to preheater one side interlude, and the interlude of defeated silo inner wall has the second guide auger, second rotating electrical machines is installed to second guide auger one end.

Preferably, first rotating electrical machines is installed to the stoving breaker upper end, and first rotating electrical machines one end fixedly connected with crushing leaf, crushing leaf is three group's parallel distribution in the stoving breaker inner wall, and smashes a first guide auger of leaf lower extreme fixedly connected with, first guide auger outer wall registrates has the baffle box, and just first guide auger is linked together with stoving breaker and preheater respectively, crushing leaf and first guide auger are swivelling joint with stoving breaker and baffle box respectively through first rotating electrical machines.

Preferably, the fan of blowing is installed to stoving breaker inner wall upper end, and the fan lower extreme parallel distribution of blowing has the hot plate, stoving breaker upper end one side intercommunication has the gas outlet, and the gas outlet inner wall is inserted and is closed the mounting groove, mounting groove one side fixedly connected with connects the loose-leaf, and the mounting groove is the upset through connecting the loose-leaf and being connected with the gas outlet, the mounting groove inner wall is inserted and is closed and install the filter block, and the mounting groove lower extreme is hollow out construction.

Preferably, the filter discs are distributed on the inner wall of the disc filter in parallel, and the opening at the lower end of the discharge port is distributed at a vertical position with the conveyor belt.

Preferably, the conveying chute is of an arc-shaped groove structure, the conveying chute and the second guide auger are concentrically distributed, the second guide auger is movably connected with the conveying chute in a rotating mode through a second rotating motor, the upper end of one side of the conveying chute is communicated with a feeding port, the other end of the feeding port is provided with a sealing cover plate, and the sealing cover plate is of a flip structure.

Preferably, the air nozzles are uniformly distributed at the upper end of the inner wall of the preheater.

Compared with the prior art, the beneficial effects of the utility model are that: this dehydration preheating device before kiln is gone into in sintering of Bayer red mud can be through disc filter with the red mud dehydration to moisture content below 20% to can scrape the material transportation fast through shovel piece, discharge gate and conveyer belt, and the preheater can carry out heat transfer recycle through the waste gas of retrieving pipe and jet in with the rotary kiln, avoids extravagant, and it is better to preheat the effect.

Drawings

FIG. 1 is a front view of a dehydration preheating device before sintering Bayer red mud into a kiln of the utility model;

FIG. 2 is a sectional view of the dehydration preheating device before sintering Bayer red mud into a kiln;

FIG. 3 is an enlarged view of the point A in FIG. 2 of the Bayer red mud sintering preheating device before entering the kiln;

FIG. 4 is an enlarged view of the B position in FIG. 2 of the Bayer red mud sintering preheating device before entering the kiln;

FIG. 5 is an enlarged view of the position C in FIG. 2 of the Bayer red mud sintering preheating device before entering the kiln;

FIG. 6 is an enlarged view of D in FIG. 2 of the dewatering and preheating device before sintering Bayer red mud into kiln.

In the figure: 1. the device comprises a support frame, 2, a disc type filter, 3, a drying and scattering machine, 4, a preheating machine, 5, a filter disc, 6, a first rotating motor, 7, an air outlet, 8, crushing leaves, 9, a first material guide auger, 10, a material guide groove, 11, a second rotating motor, 12, a second material guide auger, 13, a material conveying groove, 14, an air jet, 15, a recovery guide pipe, 16, a conveying belt, 17, a shovel block, 18, a material outlet, 19, a blowing fan, 20, a heating plate, 21, a filter block, 22, a connecting hinge, 23, a mounting groove, 24, a sealing cover plate, 25 and a material inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: a dehydration preheating device before sintering Bayer red mud into a kiln comprises a support frame 1, a disc type filter 2, a drying and scattering machine 3, a preheating machine 4, a filter disc 5, a first rotating motor 6, an air outlet 7, a crushing leaf 8, a first material guide packing auger 9, a material guide chute 10, a second rotating motor 11, a second material guide packing auger 12, a material conveying chute 13, an air jet port 14, a recovery conduit 15, a conveyor belt 16, a shovel block 17, a material outlet 18, a blowing fan 19, a heating plate 20, a filter block 21, a connecting loose leaf 22, a mounting groove 23, a sealing cover plate 24 and a material inlet 25, wherein the disc type filter 2 is mounted at the upper end of the support frame 1, the drying and scattering machine 3 is mounted at one side of the disc type filter 2, the lower end of the drying and scattering machine 3 is communicated with the preheating machine 4, the first rotating motor 6 is mounted at the upper end of the drying and scattering machine 6 is fixedly connected with the crushing leaf 8, the crushing leaves 8 are distributed in three groups in parallel on the inner wall of the drying and scattering machine 3, the lower end of the crushing leaves 8 is fixedly connected with a first guide auger 9, the outer wall of the first guide auger 9 is sleeved with a guide chute 10, the first guide auger 9 is respectively communicated with the drying and scattering machine 3 and a preheating machine 4, the crushing leaves 8 and the first guide auger 9 are respectively and rotationally connected with the drying and scattering machine 3 and the guide chute 10 through a first rotating motor 6, so that the drying and scattering machine 3 can crush materials through the crushing leaves 8 and rapidly guide the materials through the first guide auger 9, the upper end of the inner wall of the drying and scattering machine 3 is provided with a blowing fan 19, the lower end of the blowing fan 19 is distributed with a heating plate 20 in parallel, one side of the upper end of the drying and scattering machine 3 is communicated with an air outlet 7, an installation groove 23 is inserted and closed on the inner wall of the air outlet 7, one side of the installation groove 23 is fixedly connected with a connecting connection connecting hinge 22, and the installation groove 23 is connected with the air outlet 7 in an overturning way through the connecting hinge 22, the inner wall of the mounting groove 23 is inserted and installed with a filter block 21, and the lower end of the mounting groove 23 is of a hollow structure, so that the drying scattering machine 3 can be heated stably by a blowing fan 19 and a heating plate 20, and the waste gas can be filtered and discharged conveniently, and the filter block 21 can be replaced quickly and conveniently, the inner wall of the disc type filter 2 is installed with a filter disc 5, and a discharge port 18 is installed between the filter discs 5, the filter discs 5 are distributed on the inner wall of the disc type filter 2 in parallel position, the opening of the lower end of the discharge port 18 is distributed in a vertical position with the conveyor belt 16, so that the discharge port 18 can scrape the material quickly by the shovel block 17, and the conveyor belt 16 can transport stably, the edge of the upper end of the discharge port 18 is fixedly connected with the shovel block 17, the lower end of the discharge port 18 is of an open structure, the lower end of the discharge port 18 is installed with the conveyor belt 16, and one side of the conveyor belt 16 is inserted and communicated with the drying scattering machine 3, one side of the upper end of the preheating machine 4 is communicated with a recovery conduit 15, one end of the recovery conduit 15 is communicated with an air jet 14, the air jet 14 is uniformly distributed on the upper end of the inner wall of the preheating machine 4, so that the air jet 14 can uniformly guide waste gas in, and uniform preheating is facilitated, one side of the preheating machine 4 is provided with a material conveying chute 13 in an inserting manner, a second material guiding auger 12 is inserted into the inner wall of the material conveying chute 13, the material conveying chute 13 is of an arc-shaped groove structure, the material conveying chute 13 and the second material guiding auger 12 are concentrically distributed, the second material guiding auger 12 is movably connected with the material conveying chute 13 in a rotating manner through a second rotating motor 11, the upper end of one side of the material conveying chute 13 is communicated with a material inlet 25, the other end of the material inlet 25 is provided with a closed cover plate 24, and the closed cover plate 24 is of a flip structure, so that the second material guiding auger 12 facilitates stable material feeding and auxiliary materials can be conveniently added through the material inlet 25, the use is more convenient, and a second rotating electric machine 11 is installed at one end of the second material guiding auger 12.

The working principle is as follows: when the Bayer red mud dehydration preheating device is used before sintering and entering a kiln, the device is firstly assembled, then the red mud is dehydrated to the moisture content of below 20% through a disc filter 2, then the red mud is scraped through a shovel block 17, and is guided onto a conveyor belt 16 through a discharge hole 18, then the red mud is conveyed into a drying and scattering machine 3, meanwhile, a crushing blade 8 is driven to rotate through a first rotating motor 6, the red mud is crushed, then the red mud is guided into a preheating machine 4 through a first material guiding auger 9, hot gas in the rotary kiln is guided into a gas jet 14 through a recovery conduit 15 and is uniformly sprayed out to preheat materials, after the materials are completely crushed, a second rotating motor 11 of the device can be started to drive a second material guiding auger 12 to rotate, the materials in a material conveying tank 13 are guided into the rotary kiln to be processed, the waste gas is filtered and guided out through a filter block 21 in a gas outlet 7, when the device needs to be replaced, the installation tank 23 can be turned over and opened through a connection 22, the filter block 21 is extracted and replaced, and the red mud is used in the sintering process of the Bayer red mud dehydration preheating device before sintering.

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 invention.

Claims

1. The utility model provides a bayer red mud sintering dehydration preheating device before entering kiln, includes support frame (1), disc filter (2) are installed to support frame (1) upper end, and stoving breaker (3) are installed to its disc filter (2) one side, and stoving breaker (3) lower extreme intercommunication has preheater (4), its characterized in that: disc filter (2) inner wall is installed filter disc (5), and installs discharge gate (18) between filter disc (5), discharge gate (18) upper end edge fixedly connected with shovel piece (17), and discharge gate (18) lower extreme is open structure, conveyer belt (16) are installed to discharge gate (18) lower extreme, and conveyer belt (16) one side and drying breaker (3) interlude the intercommunication installation, preheater (4) upper end one side intercommunication has recovery pipe (15), and retrieves pipe (15) one end intercommunication and have air jet (14), preheater (4) one side interlude installs defeated silo (13), and defeated silo (13) inner wall interlude has second guide auger (12), second rotating electrical machines (11) are installed to second guide auger (12) one end.

2. The device for dehydrating and preheating the Bayer red mud before sintering into the kiln, according to claim 1, is characterized in that: first rotating electrical machines (6) are installed to stoving breaker (3) upper end, and first rotating electrical machines (6) one end fixedly connected with smashes leaf (8), smash leaf (8) and be three group's parallel distribution in stoving breaker (3) inner wall, and smash first guide auger (9) of leaf (8) lower extreme fixedly connected with, first guide auger (9) outer wall registrates baffle box (10), and just first guide auger (9) are linked together with stoving breaker (3) and preheater (4) respectively, it is swivelling joint with stoving breaker (3) and baffle box (10) respectively to smash leaf (8) and first guide auger (9) through first rotating electrical machines (6).

3. The device for dehydrating and preheating the Bayer red mud before sintering into the kiln, according to claim 2, is characterized in that: drying scattering machine (3) inner wall upper end is installed and is blown fan (19), and blows fan (19) lower extreme parallel distribution and have hot plate (20), drying scattering machine (3) upper end one side intercommunication has gas outlet (7), and gas outlet (7) inner wall is inserted and is closed mounting groove (23), mounting groove (23) one side fixedly connected with connects loose-leaf (22), and mounting groove (23) are the upset through connecting loose-leaf (22) and gas outlet (7) and be connected, mounting groove (23) inner wall is inserted and is closed and install filter block (21), and mounting groove (23) lower extreme is hollow out construction.

4. The device for dehydrating and preheating the Bayer red mud before sintering into the kiln, according to claim 3, is characterized in that: the filter discs (5) are distributed on the inner wall of the disc type filter (2) in parallel, and the opening at the lower end of the discharge port (18) is distributed at a vertical position with the conveyor belt (16).

5. The Bayer red mud dehydration preheating device before sintering into a kiln according to claim 4, which is characterized in that: defeated silo (13) are arc groove structure, and defeated silo (13) are concentric position distribution with second guide auger (12), second guide auger (12) are rotatory swing joint through second rotating electrical machines (11) and defeated silo (13), and defeated silo (13) one side upper end intercommunication has pan feeding mouth (25), closed cover board (24) are installed to pan feeding mouth (25) other end, and closed cover board (24) are flip structure.

6. The device for dehydrating and preheating the Bayer red mud before sintering into the kiln, according to claim 5, is characterized in that: the air nozzles (14) are uniformly distributed at the upper end of the inner wall of the preheater (4).