CN210765024U - Desulfurization gypsum calcining device - Google Patents

Desulfurization gypsum calcining device Download PDF

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Publication number
CN210765024U
CN210765024U CN201921657561.3U CN201921657561U CN210765024U CN 210765024 U CN210765024 U CN 210765024U CN 201921657561 U CN201921657561 U CN 201921657561U CN 210765024 U CN210765024 U CN 210765024U
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stirring rod
tail gas
conical roller
combustion mechanism
calcining
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CN201921657561.3U
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Chinese (zh)
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姚运家
鞠宏胜
李伯洋
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Beijing New Building Material Group Co Ltd
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Beijing New Building Material Group Co Ltd
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Abstract

The embodiment of the utility model discloses a desulfurized gypsum calcining device, which comprises a feeding conveyor belt, a combustion mechanism and a tail gas treatment mechanism, wherein the combustion mechanism comprises a conical roller and a base, the bottom of the conical roller is provided with an opening-closing type discharge valve, the top edge of the conical roller is provided with an annular feeding channel, the center of the base is provided with a stirring rod through a bearing, the outer surface of the stirring rod is provided with a spiral stirring blade from top to bottom, a central channel is arranged in the stirring rod, and the stirring rod is provided with a plurality of scattering holes communicated with the central channel; the desulfurization gypsum is raised in the combustion mechanism by means of the high-temperature tail gas so as to increase the heating area of the desulfurization gypsum, the materials can be continuously scattered from the middle to the periphery in the heating and calcining processes by the stirring effect of the spiral stirring blades, and the materials are continuously sprayed by high-temperature fuel gas to enter the calcining process in the scattering process, so that the calcining effect can be fully improved.

Description

Desulfurization gypsum calcining device
Technical Field
The embodiment of the utility model relates to a gypsum production technical field, concretely relates to desulfurization gypsum calcining device.
Background
The production of the building gypsum adopts a dry gypsum calcining process. Before the sixties of the twenty-century, the traditional slow-burning intermittent frying pan and the external-burning rotary kiln are mainly used, the technical transformation is carried out on the equipment in the later stage of the sixties, the intermittent frying pan is developed into a continuous frying pan in the seventies, and the conical frying pan is developed after the eighties; the rotary kiln is also developed from an external burning type to an internal burning type; in order to promote the technical progress of the gypsum industry and improve the running speed of the production line of gypsum building material products, an air-flow type rapid calcining process is developed.
The production of gypsum or desulfurized gypsum used as raw material in the domestic paper-surface gypsum board industry is mostly calcined by adopting heat generated by coal, and in recent years, a calcination technology using natural gas as fuel appears. However, the existing calcination technology has the following defects:
(1) in the prior art, insufficient calcination of gypsum often occurs in the process of calcining gypsum by using an airflow process, so that the calcination efficiency of gypsum is greatly reduced;
(2) the high-temperature tail gas discharged in the calcining process contains larger heat energy, the part of heat energy is often collected by people and used for industrial domestic water, and the part of energy can also be used in the production link of the desulfurization gypsum calcining so as to improve the calcining process and the finished product quality of the desulfurization gypsum calcining.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the utility model provides a desulfurization gypsum calcining device to solve the problem that calcine is inhomogeneous among the prior art and heat energy can not make full use of.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a desulfurized gypsum calcining device comprises a feeding conveyor belt, a combustion mechanism and a tail gas treatment mechanism, wherein the discharge end of the feeding conveyor belt is arranged above the combustion mechanism, and the tail gas treatment mechanism is connected with the combustion mechanism through an exhaust pipe and a circulating pipe;
the combustion mechanism comprises a conical roller driven by a power mechanism to rotate and a base fixedly arranged on the upper end surface of the conical roller through an attached suspension rod, the bottom of the conical roller is provided with an opening-closing type discharge valve, and the top edge of the conical roller is provided with an annular feeding channel;
the stirring rod is installed at the center of the base through a bearing, spiral stirring blades are arranged on the outer surface of the stirring rod from top to bottom, a central channel is arranged in the stirring rod, a plurality of overflowing holes communicated with the central channel are formed in the stirring rod, and a through hole is formed in the tail end of the stirring rod.
As an optimized scheme of the utility model, cyclic annular pan feeding passageway below is equipped with S-shaped pay-off passageway, just the side of S-shaped pay-off passageway is equipped with waste heat air drum blowpipe, waste heat air drum blowpipe with circulating pipe lug connection.
As an optimized proposal of the utility model, the inclination angle of the S-shaped feeding channel is 30-60 degrees.
As an optimized scheme of the utility model, tail gas processing mechanism includes dust arrester installation and exhaust chimney, by combustion mechanism passes through the blast pipe and discharges high temperature tail gas to dust arrester installation, and warp behind the dust arrester installation dust removal through the circulating pipe with waste heat wind drum blowpipe connection, another export of dust arrester installation with exhaust chimney intercommunication.
The utility model discloses an embodiment has following advantage:
(1) according to the invention, high-temperature fuel gas is directly sprayed out through the stirring rod, so that the calcining effect is improved, the waste heat tail gas is utilized to blow away the high-temperature fuel gas while heating, the desulfurization gypsum is lifted in the combustion mechanism by means of the high-temperature tail gas so as to increase the heating area of the desulfurization gypsum, and the combustion efficiency of the desulfurization gypsum in the combustion mechanism can be improved;
(2) in the combustion mechanism, the materials can be continuously scattered from the middle to the periphery in the heating and calcining processes through the stirring action of the spiral stirring blades, and the materials are continuously sprayed by high-temperature gas to enter the calcining process in the scattering process, so that the calcining effect can be fully improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
in the figure: 1-a feeding conveyor belt; 2-a combustion mechanism; 3-tail gas treatment mechanism; 4-an exhaust pipe; 5-a circulating pipe;
201-conical roller; 202-attaching a boom; 203-a base; 204-open-close type discharge valve; 205-annular feed channel; 206-a stirring rod; 207-helical stirring blades; 208-a central channel; 209-S-shaped feed channel; 210-a waste heat air blowing pipe;
301-dust collecting device; 302-exhaust stack.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. 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.
As shown in figure 1, the utility model provides a desulfurization gypsum calcining device, which aims at improving the heat energy utilization rate in the calcined gypsum calcining process and the uniformity of heating in the gypsum calcining process.
The device comprises a feeding conveyor belt 1, a combustion mechanism 2 and a tail gas treatment mechanism 3, wherein the discharge end of the feeding conveyor belt 1 is arranged above the combustion mechanism 2, and the tail gas treatment mechanism 3 is connected with the combustion mechanism 2 through an exhaust pipe 4 and a circulating pipe 5.
In this embodiment, the specific operation flow is as follows: the broken gypsum is sent into the combustion mechanism through the feeding conveyor belt, the gypsum is calcined through high-temperature gas in the combustion mechanism, and waste gas generated by calcination enters the tail gas treatment mechanism, wherein the tail gas treatment mechanism sends purified gas into the combustion mechanism again to make full use of waste heat of the purified gas, and on the other hand, the waste gas is directly exhausted after heat exchange.
The combustion mechanism 2 comprises a conical roller 201 driven by a power mechanism to rotate and a base 203 fixedly mounted on the upper end face of the conical roller 201 through an attached suspender 202, wherein the conical roller 201 is a main heating bearing container, and is driven to rotate through a power mechanism in order to improve the heating efficiency.
An open-close type discharge valve 204 is arranged at the bottom of the conical roller 201, calcined gypsum is discharged by rotating the open-close type discharge valve 204, and an annular feeding channel 205 is arranged at the edge of the top of the conical roller 201.
An S-shaped feeding channel 209 is arranged below the annular feeding channel 205, a waste heat air blowing pipe 210 is arranged on the side surface of the S-shaped feeding channel 209, and when the crushed gypsum enters the conical roller 201 through the S-shaped feeding channel 209, the purified waste gas is blown in by the waste heat air blowing pipe 210, so that the crushed gypsum is blown to the center of the conical roller 201, and heating dead angles are avoided.
The waste heat air blowing pipe 210 is directly connected with the circulating pipe 5 so as to receive the purified waste heat. Wherein, in order to further improve the blowing effect, the inclination angle of the S-shaped feeding channel 209 is 30-60 degrees.
In order to improve the uniformity of calcination, the stirring rod 206 is installed at the center of the base 203 through a bearing, the outer surface of the stirring rod 206 is provided with a spiral stirring blade 207 from top to bottom, wherein the spiral stirring blade 207 is used for lifting materials to the upper side along the spiral stirring blade 207 in the stirring process, and the materials are thrown to the side wall of the conical roller 201 due to the centrifugal force after losing the support of the spiral stirring blade 207, so that the uniformity of mixed materials is realized.
In the present embodiment, the effect of calcination is further improved, and the high-temperature gas is directly ejected from the stirring rod 206, thereby uniformly calcining the material being stirred. Because the puddler needs to rotate, and still need external high temperature gas, consequently the part that is located conical drum 201 outside at the puddler is provided with the high temperature gas exchange box not sign in the picture, through set up the through-hole on the puddler for high temperature gas in the high temperature gas exchange box gets into the puddler, and transmits to the hole that overflows through the central channel in the puddler, thereby realizes overflowing of high temperature gas and scatters.
The concrete structure is that a central channel 208 is arranged in the stirring rod 206, a plurality of overflow holes communicated with the central channel 208 are arranged on the stirring rod 206, and in order to prevent materials from entering the central channel in the stirring rod, a through hole is arranged at the tail end of the stirring rod 206, so that the materials entering the through hole are released.
The high-temperature tail gas discharged after being treated by the tail gas treatment mechanism contains larger heat energy, the part of heat energy is often collected by people and used for industrial domestic water, and the part of energy can also be used in the production link of the desulfurization gypsum calcination so as to improve the calcination process and the finished product quality of the desulfurization gypsum calcination.
Specifically, the method comprises the following steps:
the tail gas treatment mechanism 3 comprises a dust collecting device 301 and an exhaust chimney 302, the combustion mechanism 2 discharges high-temperature tail gas to the dust collecting device 301 through an exhaust pipe 4, the high-temperature tail gas is subjected to dust removal through the dust collecting device 301 and then is connected with the waste heat air drum blowpipe 210 through a circulating pipe 5, and the other outlet of the dust collecting device 301 is communicated with the exhaust chimney 302.
In letting in combustion mechanism again with the tail gas after purifying, can improve the inside temperature of combustion mechanism on the one hand, on the other hand can also make desulfurization gypsum raise in combustion mechanism 3 with the help of high temperature tail gas at the entrance in order to increase the heated area of desulfurization gypsum, can improve the combustion efficiency of desulfurization gypsum in combustion mechanism 3 inside.
In addition, also can let in the tail gas after the purification in preprocessing device, directly get into gypsum with the tail gas that contains a large amount of waste heat and preheat, avoid the gypsum that the initial stage got into to bond together, improve the effect of operations such as smashing.
Thus, the utilization of the exhaust gas may include two ways:
firstly, the method comprises the following steps: high-temperature tail gas discharged by the combustion mechanism is subjected to dust removal by a dust collection device and then is connected with the combustion mechanism through a waste heat utilization pipe, and desulfurized lime entering the combustion mechanism is preheated. And as a part of the heat source, participate in the process of calcining slaked lime again, thus reduce the energy input of calcining slaked lime and increase the utilization ratio of energy;
secondly, the method comprises the following steps: high-temperature tail gas discharged by the combustion mechanism is subjected to dust removal through a dust collection device and then is connected with the crushing mechanism through a waste heat utilization pipe, the high-temperature tail gas in the waste heat utilization pipe is subjected to heat exchange with the crushing mechanism and then is connected with an exhaust chimney for discharge, and the tail gas discharged from the waste heat utilization pipe still has heat energy which can be recycled and can be used as domestic water in a production area.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (4)

1. The desulfurization gypsum calcining device is characterized by comprising a feeding conveyor belt (1), a combustion mechanism (2) and a tail gas treatment mechanism (3), wherein the discharge end of the feeding conveyor belt (1) is arranged above the combustion mechanism (2), and the tail gas treatment mechanism (3) is connected with the combustion mechanism (2) through an exhaust pipe (4) and a circulating pipe (5);
the combustion mechanism (2) comprises a conical roller (201) driven by a power mechanism to rotate and a base (203) fixedly mounted on the upper end face of the conical roller (201) through an attached suspender (202), an open-close type discharge valve (204) is arranged at the bottom of the conical roller (201), and an annular feeding channel (205) is arranged at the top edge of the conical roller (201);
the stirring rod (206) is installed at the center of the base (203) through a bearing, a spiral stirring blade (207) is arranged on the outer surface of the stirring rod (206) from top to bottom, a central channel (208) is arranged in the stirring rod (206), a plurality of overflow holes communicated with the central channel (208) are formed in the stirring rod (206), and a through hole is formed in the tail end of the stirring rod (206).
2. The desulfurization gypsum calcination device according to claim 1, wherein an S-shaped feeding channel (209) is arranged below the annular feeding channel (205), a waste heat air blowing pipe (210) is arranged on the side surface of the S-shaped feeding channel (209), and the waste heat air blowing pipe (210) is directly connected with the circulating pipe (5).
3. A desulfurized gypsum calcination apparatus according to claim 2 wherein the angle of inclination of said S-shaped feed channel (209) is from 30 ° to 60 °.
4. The desulfurization gypsum calcination device according to claim 2, wherein the tail gas treatment mechanism (3) comprises a dust collection device (301) and an exhaust chimney (302), the combustion mechanism (2) discharges high-temperature tail gas to the dust collection device (301) through an exhaust pipe (4), the dust collection device (301) removes dust, and then the high-temperature tail gas is connected with the residual heat air blowing pipe (210) through a circulating pipe (5), and the other outlet of the dust collection device (301) is communicated with the exhaust chimney (302).
CN201921657561.3U 2019-09-30 2019-09-30 Desulfurization gypsum calcining device Active CN210765024U (en)

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Application Number Priority Date Filing Date Title
CN201921657561.3U CN210765024U (en) 2019-09-30 2019-09-30 Desulfurization gypsum calcining device

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Application Number Priority Date Filing Date Title
CN201921657561.3U CN210765024U (en) 2019-09-30 2019-09-30 Desulfurization gypsum calcining device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114739165A (en) * 2022-04-15 2022-07-12 李光超 Decarbonization of yellow phosphorus ore calcines system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114739165A (en) * 2022-04-15 2022-07-12 李光超 Decarbonization of yellow phosphorus ore calcines system

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