CN210560115U

CN210560115U - High-temperature gypsum calcining furnace

Info

Publication number: CN210560115U
Application number: CN201921397401.XU
Authority: CN
Inventors: 杨连树
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-05-19
Anticipated expiration: 2029-08-27

Abstract

The utility model provides a high temperature gypsum calcining furnace, include and calcine district, boiling district (1) from supreme stirring district, the heat exchange that communicates in proper order down, the heat exchange is calcined the district and is included hot-blast chamber (201), establishes hot exchange pipe (202) of a plurality of air feed stream circulations in hot-blast chamber (201), and a plurality of hot exchange pipes (202) form heat exchange area (203) with the material heat transfer, set up along the air current direction in hot-blast chamber (201) and make the air current present the baffle of the orbit of U type flow at least once in heat exchange area (203). The utility model discloses this production facility is simple, compact structure, convenient operation, the maintenance of being convenient for. The utility model discloses establish the rotary kiln into vertical burning furnace, equipment structure is compact simple, so do not need the kiln body that traditional rotary kiln is so long, practiced thrift the equipment size, reduce the required area of factory building, also reduced manufacturing cost simultaneously, reduced the fixed asset investment.

Description

High-temperature gypsum calcining furnace

Technical Field

The utility model relates to a gypsum processing field, in particular to high temperature gypsum calcining furnace for producing building gypsum powder by using industrial by-product gypsum.

Background

The production calcining furnace for processing the industrial byproduct gypsum into the building gypsum powder is a rotary kiln mostly in the prior art, the heat energy consumption of the traditional rotary kiln equipment is high, the complex maintenance rate of the equipment is high, if the rotary kiln adopts a one-step method to produce the gypsum powder, the equipment has long length and large occupied space, if the rotary kiln adopts a two-step method to produce the building gypsum powder, heat transfer oil is also needed for heating, the investment of the whole production line is large, and the fixed asset investment of enterprises is increased.

SUMMERY OF THE UTILITY MODEL

To the not enough that exists among the prior art, the utility model provides a burning furnace is forged to high temperature gypsum has solved the tradition and has utilized industry by-product gypsum to process into the problem that the burning furnace occupation space is big, the production line investment is big into the production of building gesso.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the high-temperature gypsum calcining furnace is characterized in that: include from supreme stirring district, heat exchange calcination district, the boiling region that communicates in proper order down, the heat exchange is calcined the district and is included the hot-blast chamber, and the hot-blast intracavity is equipped with a plurality of hot-exchange pipes that supply the air current circulation, and a plurality of hot-exchange pipes form the heat exchange district with the material heat transfer, and the baffle that makes the air current present U type flow path at least once is set up along the air current direction in the hot-blast intracavity.

Furthermore, divide into scraping grey district, the stirring base that sets up from top to bottom through the apron with the stirring, be equipped with a plurality of air vents that prevent that the material from falling into the stirring base on the apron, scrape the scraper blade of establishing in the grey district with the apron contact, establish the motor that drives the scraper blade motion in the stirring base, establish support, air inlet on the stirring base.

Furthermore, the boiling zone is of a cylindrical structure, the side wall of the boiling zone is sequentially provided with an air duct hole and a discharge hole from top to bottom, the bottom of the boiling zone is communicated with the hot air cavity, and the top of the boiling zone is provided with a material injection hole.

Further, the hot-blast chamber is the cylinder structure that corresponds with the boiling zone, set up first ventilation chamber, second ventilation chamber in hot-blast chamber outer wall symmetry, hot-blast intracavity is located to hot-blast hot-exchange pipe level, hot-exchange pipe's one end extends to in the first ventilation intracavity from hot-blast chamber, hot-exchange pipe's the other end extends to in the second ventilation intracavity from hot-blast chamber, the baffle is including locating the first baffle in the hot-blast intracavity and parallel with hot-exchange pipe, the second baffle, the one end of first baffle extends to first ventilation chamber and is connected with first ventilation intracavity wall, the other end of first baffle extends to in the second ventilation intracavity, the one end of second baffle extends to in the second ventilation intracavity and is connected with second ventilation intracavity wall, the other end of second baffle extends to in the first ventilation intracavity, first baffle, the second baffle makes the air current present twice U type flow path in the heat exchange zone.

Furthermore, the first ventilation cavity above the first partition plate and the second ventilation cavity below the second partition plate are both provided with air ports.

Furthermore, access holes are formed in the boiling region, the first ventilation cavity and the second ventilation cavity.

Furthermore, the boiling zone, the hot air cavity, the first ventilation cavity, the second ventilation cavity and the heat exchange tube are all made of stainless steel which can resist the high temperature of more than 800 ℃.

Compared with the prior art, the utility model discloses following beneficial effect has:

firstly, the partition board enables the air flow to present at least one U-shaped flow track in the heat exchange area, namely the flowing time of the air flow in the heat exchange area is prolonged, and the heat exchange time between the hot air cavity and the material is prolonged, so that the condition that the equipment occupies the space is controlled, and the heat exchange efficiency and the heat exchange effect are guaranteed;

the stirring zone, the heat exchange calcining zone and the boiling zone are communicated in sequence from bottom to top, a passage for materials to pass through is formed by the stirring zone, the heat exchange calcining zone and the boiling zone, and the materials (the gypsum powder with water) are heated and dehydrated in the heat exchange calcining zone, so that the materials are prevented from caking and settling in the calcining process;

and thirdly, the stirring area is provided with an air inlet, so that air can enter from the lower part of the equipment and is in countercurrent contact with the material (the gypsum powder with water) in the equipment, the dried material is conveyed to the boiling area, and the scraper plate is arranged, so that the situation that the air hole is blocked by the powder to cause the air not to enter the stirring area is avoided.

To sum up, the utility model discloses a production facility is simple, compact structure, convenient operation, the maintenance of being convenient for. The utility model discloses establish the rotary kiln into vertical burning furnace, equipment structure is compact simple, so do not need the kiln body that traditional rotary kiln is so long, practiced thrift the equipment size, reduce the required area of factory building, also reduced manufacturing cost simultaneously, reduced the fixed asset investment.

Drawings

FIG. 1 is a top view of a high temperature gypsum calciner according to the present application.

FIG. 2 is a front view of the high temperature gypsum calciner of the present application.

FIG. 3 is a side view of a high temperature gypsum calciner of the present application.

Fig. 4 is a sectional view B-B of fig. 3.

3 fig. 3 5 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 2 3. 3

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in figures 1-5, the high-temperature gypsum calcining furnace comprises a stirring zone, a heat exchange calcining zone and a boiling zone 1 which are communicated in sequence from bottom to top.

The boiling zone 1 is of a cylindrical structure, is made of 304 stainless steel materials, is corrosion-resistant and can resist high temperature of over 800 ℃, so that the heat exchange process can be smoothly carried out, the calcinator is not corroded by acidic substances at high temperature, and the durability of the calcinator is ensured. Of course, stainless steel 304L, 316L and 316L can be replaced.

The side wall of the boiling area 1 is sequentially provided with an air duct hole 101 and a discharge hole 102 from top to bottom, the air duct hole 101 is used for taking away industrial byproduct gypsum, namely water vapor and hot air generated by gypsum powder blocks with water by a fan, and the discharge hole 102 is used for automatically overflowing the partially dehydrated gypsum powder out of the boiling area 1 according to the self-weight principle. In order to communicate with the heat exchange calcining zone, an opening is hollowed out at the bottom of the boiling zone 1, and the inner diameter of the opening is equal to that of the boiling zone 1. The top of the boiling zone 1 is provided with a material injection hole for injecting the gypsum powder block with water into the boiling zone 1.

The heat exchange calcining zone comprises a hot air cavity 201, the hot air cavity 201 is of a cylindrical structure corresponding to the boiling zone 1, namely the inner diameters of the hot air cavity 201 and the boiling zone 1 are the same, the upper end part and the lower end part of the hot air cavity 201 are hollowed out to form openings, and the openings of the upper end part and the lower end part of the hot air cavity 201 are as large as the inner diameter of the hot air cavity 201 and as large as the inner diameter of the boiling zone 1.

A plurality of heat exchange tubes 202 for air flow circulation are arranged in the hot air cavity 201, the heat exchange regions 203 for heat exchange with materials are formed by the heat exchange tubes 202, and baffles for enabling the air flow to present at least one U-shaped flow track in the heat exchange regions 203 are arranged in the hot air cavity 201 along the air flow direction, specifically, the embodiment is arranged as follows:

referring to fig. 1, a first ventilation cavity 204 and a second ventilation cavity 205 are symmetrically arranged on the outer wall of the hot air cavity 201, and the first ventilation cavity 204 and the second ventilation cavity 205 are both welded on the outer wall of the hot air cavity 201 to achieve a fixing effect. The hot air cavity 201, the heat exchange tube 202, the first ventilation cavity 204 and the second ventilation cavity 205 are also made of 304 stainless steel materials, and are resistant to corrosion and high temperature of over 800 ℃.

The heat exchange tubes 202 are horizontally arranged in the hot air chamber 201, referring to fig. 4, the heat exchange tubes 202 are arranged in 14 rows horizontally in the hot air chamber 201, and each row comprises 17 heat exchange tubes 202, referring to fig. 5, one end of each heat exchange tube 202 extends from the hot air chamber 201 to the first ventilation chamber 204, and the other end of each heat exchange tube 202 extends from the hot air chamber 201 to the second ventilation chamber 205.

The partition plates comprise a first partition plate 206 and a second partition plate 207 which are arranged in the hot air cavity 201 and are parallel to the heat exchange tube 202, one end of the first partition plate 206 extends to the first ventilation cavity 204 and is connected with the inner wall of the first ventilation cavity 204, the other end of the first partition plate 206 extends to the second ventilation cavity 205, one end of the second partition plate 207 extends to the second ventilation cavity 205 and is connected with the inner wall of the second ventilation cavity 205, the other end of the second partition plate 207 extends to the first ventilation cavity 204, as shown in figures 4 and 5, the first partition plate 206 is arranged between the eighth row and the ninth row counted from top to bottom, the second partition plate 207 is arranged between the tenth row and the twelfth row counted from top to bottom, the edge parts of the first partition plate 206 and the second partition plate 207 at the two sides in the hot air cavity 201 are all arranged close to the inner wall of the hot air cavity, the two ends of the first partition plate 206 and the second partition plate 207 extend out of the hot air cavity 201, thereby realizing that one end of the first partition plate 206 extends to the first ventilation cavity 204 and is connected with the inner wall of, the other end of the first partition plate 206 extends into the second ventilation cavity 205, one end of the second partition plate 207 extends into the second ventilation cavity 205 and is connected with the inner wall of the second ventilation cavity 205, and the other end of the second partition plate 207 extends into the first ventilation cavity 204. Air ports, not shown, are provided in the first ventilation chamber 204 above the first partition 206 and the second ventilation chamber 205 below the second partition 207. In this embodiment, the air holes in the first ventilation cavity 204 above the first partition plate 206 are used for air intake, and the air holes in the second ventilation cavity 205 below the second partition plate 207 are used for air outlet, where the air intake and the air outlet are heat exchange gas participating in heat exchange. An air hole in the second ventilation cavity 205 below the second partition plate 207 is communicated with a blower, and an air hole in the first ventilation cavity 204 above the first partition plate 206 is communicated with a draught fan.

With such an arrangement, the first partition plate 206 and the second partition plate 207 enable the airflow to present two connected U-shaped flow tracks in the heat exchange area 203, so that the heat exchange gas circulates among the heat exchange tube 202, the first ventilation cavity 204 and the second ventilation cavity 205, the flow direction of the heat exchange gas is reasonably divided, and the heat exchange gas forms a hot air loop in the first ventilation cavity 204, the heat exchange tube 202 and the second ventilation cavity 205.

Be equipped with apron 305 in the stirring district, scrape grey district 304, stirring base 301 that divide into upper and lower setting through apron 305 with the stirring district, scrape grey district 304 upper portion opening, scrape the lower tip opening of grey district 304 opening intercommunication hot-blast chamber 201, and boiling zone 1, hot-blast chamber 201, scrape grey district 304 three welded connection in proper order. Establish a plurality of air vents that prevent that the gesso after the material is dried from falling into stirring base 301 on the apron 305, the air vent aperture is less than the gesso particle diameter, scrape the scraper blade of establishing in the grey district 304 with the apron 305 contact, the vertical setting of scraper blade establishes the motor 302 of drive scraper blade motion in the stirring base 301, the output shaft of motor runs through the apron 305 back and connects the scraper blade, establishes support 303 on the stirring base 301, sets up two air inlets 306 in the bottom of stirring base 301.

In order to facilitate the maintenance of the equipment, the outer walls of the boiling zone 1, the first ventilation cavity 204 and the second ventilation cavity 205 are provided with access holes 4.

When the device is used, heat exchange gas with the temperature of 500-1000 ℃ is introduced from air holes in the first ventilation cavity 204 above the first partition plate 206 by using an induced draft fan, the heat exchange gas enters the heat exchange tubes 202 above the first partition plate 206 from the first ventilation cavity 204, flows into the second ventilation cavity 205 from the heat exchange tubes 202, then enters the heat exchange tubes 202 between the first partition plate 206 and the second partition plate 207, then returns to the first ventilation cavity 204 again, continues to enter the heat exchange tubes 202 below the second partition plate 207, and then is sent out through an air blower through air holes in the second ventilation cavity 205 below the second partition plate 207.

Gas with the temperature of 80-300 ℃ is introduced from a gas inlet 306 at the bottom of the stirring base 301, the water-bearing gypsum powder block is injected into the boiling zone 1 from the material injection hole to be in countercurrent contact with the gas from the gas inlet 306, the water-bearing gypsum powder block falls into the hot air cavity due to large water-bearing weight to exchange heat with the heat exchange gas in the heat exchange tube 202, is dried and dehydrated, is dehydrated to become dry lime powder, is carried to the boiling zone 1 by the gas from the gas inlet 306 after the weight is reduced, and is sent to a finished product collecting process from the discharge hole 102. How to feed the gypsum powder blocks with water into the equipment and how to feed the finished gypsum powder out of the equipment are the existing mature technologies, and the details are not repeated here.

In order to enable the gas from the bottom of the stirring base 301 to smoothly enter the hot air cavity and the boiling area, a plurality of air holes are formed in the cover plate for ventilation, in order to prevent gypsum powder from blocking the air holes, the diameter of each air hole is set to be a round hole with the diameter smaller than 2mm, and the motor drives the scraper to move on the top surface of the cover plate to prevent gypsum powder with the diameter larger than the diameter of each air hole from caking and covering the air holes.

In the explanation of the present invention, it is to be noted that the terms "first", "second", and the like are merely used for convenience of description and understanding, and do not limit the importance degree, the number of uses, or the installation order of specific technical features.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The high-temperature gypsum calcining furnace is characterized in that: comprises a stirring zone, a heat exchange calcining zone and a boiling zone (1) which are communicated in turn from bottom to top,

the heat exchange calcining zone comprises a hot air cavity (201), a plurality of heat exchange tubes (202) for air flow circulation are arranged in the hot air cavity (201), the plurality of heat exchange tubes (202) form a heat exchange zone (203) for exchanging heat with the material,

the hot air cavity (201) is internally provided with a baffle plate along the air flow direction, so that the air flow presents at least one U-shaped flow track in the heat exchange area (203).

2. A high temperature gypsum calciner according to claim 1 wherein: divide into scraping grey district (304), stirring base (301) of setting up from top to bottom through apron (305) with the stirring district, be equipped with a plurality of air vents that prevent the material from falling into stirring base (301) on apron (305), scrape the scraper blade of establishing in grey district (304) and apron (305) contact, establish motor (302) that drive the scraper blade motion in stirring base (301), establish support (303), air inlet (306) on stirring base (301).

3. A high temperature gypsum calciner according to claim 1 wherein: the fluidized bed is characterized in that the boiling zone (1) is of a cylindrical structure, air duct holes (101) and discharge holes (102) are sequentially formed in the side wall of the boiling zone (1) from top to bottom, the bottom of the boiling zone (1) is communicated with a hot air cavity (201), and material injection holes are formed in the top of the boiling zone (1).

4. A high temperature gypsum calciner according to claim 3 wherein: the hot air cavity (201) is of a cylindrical structure corresponding to the boiling region (1), a first ventilation cavity (204) and a second ventilation cavity (205) are symmetrically arranged on the outer wall of the hot air cavity (201), the heat exchange tube (202) is horizontally arranged in the hot air cavity (201), one end of the heat exchange tube (202) extends into the first ventilation cavity (204) from the hot air cavity (201), the other end of the heat exchange tube (202) extends into the second ventilation cavity (205) from the hot air cavity (201), the partition plate comprises a first partition plate (206) and a second partition plate (207) which are arranged in the hot air cavity (201) and are parallel to the heat exchange tube (202), one end of the first partition plate (206) extends into the first ventilation cavity (204) and is connected with the inner wall of the first ventilation cavity (204), the other end of the first partition plate (206) extends into the second ventilation cavity (205), one end of the second partition plate (207) extends into the second ventilation cavity (205) and is connected with the inner wall of the second ventilation cavity (205), the other end of the second partition plate (207) extends into the first ventilation cavity (204), and the first partition plate (206) and the second partition plate (207) enable the air flow to present two times of U-shaped flow tracks in the heat exchange area (203).

5. The high temperature gypsum calciner of claim 4, wherein: air ports are arranged on the first ventilation cavity (204) above the first partition plate (206) and the second ventilation cavity (205) below the second partition plate (207).

6. The high temperature gypsum calciner of claim 4, wherein: and access holes (4) are formed in the boiling region (1), the first ventilation cavity (204) and the second ventilation cavity (205).

7. A high temperature gypsum calciner according to any one of claims 1 to 6 wherein: the boiling zone (1), the hot air cavity (201), the first ventilation cavity (204), the second ventilation cavity (205) and the heat exchange tube (202) are all made of stainless steel resistant to high temperature of more than 800 ℃.