CN213924532U - Gypsum frying pan using heat conducting oil or steam as heat transfer medium - Google Patents
Gypsum frying pan using heat conducting oil or steam as heat transfer medium Download PDFInfo
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- CN213924532U CN213924532U CN202022528485.5U CN202022528485U CN213924532U CN 213924532 U CN213924532 U CN 213924532U CN 202022528485 U CN202022528485 U CN 202022528485U CN 213924532 U CN213924532 U CN 213924532U
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Abstract
The utility model relates to the technical field of gypsum fried flour, and provides a gypsum frying pan using heat conducting oil or steam as a heat transfer medium, which comprises a pan body, a stirring device and a discharging device; the lower surface of the bottom of the pot body is provided with a first heating device; the first heating device is internally provided with a first heating channel for conveying heat conducting oil or steam; a plurality of layers of second heating devices are arranged in the pot body from top to bottom; the second heating device comprises at least one group of second heating tube bundles; and a second heating channel for conveying heat conducting oil or steam is arranged in the second heating tube bundle. The utility model discloses a mode that the bottom of a boiler adopted the on-the-spot tailor-welding of steel sheet to make has not only reduced the manufacturing requirement and has made the degree of difficulty, has improved the unit production scale of gypsum frying pan moreover, makes it not receive the restriction of making and transporting the bottleneck. The utility model discloses a gypsum frying pan does not have the complicated stove system of building, and it is fast to get up the pot, and the bottom of a boiler does not have the risk of scaling loss, and the security is high, greatly reduced the heat loss, improved the heat utilization ratio.
Description
Technical Field
The utility model belongs to the technical field of the gypsum fried flour technique and specifically relates to a gypsum frying pan, especially continuous frying pan of gypsum that use conduction oil or steam as heat transfer medium.
Background
The gypsum frying pan is a device for frying gypsum powder, and the gypsum powder fried by the gypsum frying pan is mainly characterized by stable strength, initial and final setting time and phase components and small variation range. Not only the quality and the service performance of the product which is just produced are very stable, but also the change range of the quality and the service performance of the product along with the time is very small. Therefore, the gypsum powder fried by the gypsum frying pan can meet the performance requirements of products needing to enter the market for delayed use and indefinite use, such as plastering gypsum, self-leveling gypsum and the like.
Compared with the boiling furnace gypsum powder frying equipment with the quick setting characteristic, the gypsum frying pan has the most obvious characteristic of slow setting characteristic. Meanwhile, the gypsum powder fried by a gypsum frying pan also has the characteristics of long initial and final setting time, low standard thickening water consumption and high standard thickening strength, and the characteristics are great advantages for products such as plastering gypsum, self-leveling gypsum, gypsum wallboard and the like.
Fig. 1 is a schematic structural view of a conventional gypsum frying pan. The traditional gypsum frying pan comprises a pan body 10; the pot body 10 comprises a cylindrical pot wall 101 and a pot bottom 102 arranged at the bottom of the pot wall 101; a hot flue gas mixing chamber 11 is arranged below the pot bottom 102, and a combustion chamber 12 communicated with the interior of the hot flue gas mixing chamber 11 is arranged on one side of the hot flue gas mixing chamber 11; the hot flue gas mixing chamber 11 and the combustion chamber 12 are both formed by masonry of refractory material; a flue gas channel 13 which is formed by building refractory materials and is communicated with the hot flue gas mixing chamber 11 is arranged around the boiler wall 101; a fire tube 14 which passes through the boiler wall 101 and is communicated with the flue gas channel 13 is arranged in the boiler body 10; a stirring device 15 for stirring the materials in the pot body 10 is arranged in the pot body 10; an overflow pipe 16 which can make the materials automatically overflow is also arranged in the pot body 10.
The process of producing building gypsum powder by using the traditional gypsum wok comprises the following steps: starting the stirring device 15, preheating the pot body 10 and the furnace body, namely burning fuel such as coal, heavy oil or natural gas in the combustion chamber 12, leading hot flue gas after burning to rise along a bilateral symmetry double helix from the pot bottom 102 along a flue gas channel 13 on the outer wall of the pot and fire tubes 14 in the pot, and leading out by a draught fan after the hot flue gas passes through the multiple layers of fire tubes 14 in a reciprocating and circulating manner; after the preheating of the pot body 10 and the furnace body is finished, the slow feeding is started, the feeding speed is controlled, the hot smoke conducts heat through conduction, the heat is transferred to the materials to dehydrate the materials, meanwhile, the materials are in a fluidized state under the action of the stirring device 15 and the water vapor, and the dehydrated materials become calcined gypsum powder and automatically overflow out from the overflow pipe 16.
The indirect heating of hot flue gas, mechanical stirring and "dehydration of low constant temperature for a long time" are the most outstanding characteristics of traditional gypsum frying pan, however, traditional gypsum frying pan still has following shortcoming:
1. the pan bottom 102 of the traditional gypsum pan is made of special-shaped integral heat-resistant steel by casting, and the part of the pan bottom 102, which is welded with the steel structure pan wall 101, needs to be subjected to finish machining and then is welded with the steel structure pan wall 101 in an inserted manner. This results in the pan bottom 102 being an integral part of the inseparable machine-processing and manufacturing, which not only brings about high manufacturing requirements, but also has great manufacturing difficulty for the large gypsum pan required at present, and is limited by the bottleneck of conventional transportation except for shipping.
Taking the one-step process of frying the building gypsum powder by the byproduct gypsum as an example, the diameter of the pot bottom 102 of a gypsum frying pot required by 20 ten thousand tons production scale per year exceeds phi 5m, the pot bottom 102 with the size has high manufacturing requirement and great manufacturing difficulty, and even if the manufacturing is finished, the problem that the size of the pot bottom 102 exceeds the limit of conventional transportation except sea transportation and cannot be transported to a construction site exists.
Therefore, the traditional gypsum frying pan has technical bottlenecks in manufacturing and transportation, and the single-machine production scale cannot be increased.
2. The traditional gypsum frying pan has the temperature of hot flue gas at the pan bottom 102 as high as 800 ℃, which is almost close to the use limit temperature of the conventional heat-resistant cast steel, and the temperature of the first layer of fire tubes contacting the hot flue gas also reaches about 600 ℃. Therefore, if the temperature of the hot flue gas is improperly controlled, the body 10 of the gypsum frying pan, especially the pan bottom 102, is easily burnt and damaged, which not only puts higher requirements on automatic control, but also has greater potential safety hazard in the actual production process.
3. The traditional gypsum wok adopts hot flue gas as a heat transfer medium, the working temperature of the hot flue gas is generally not higher than 800 ℃, the discharge temperature of the hot flue gas is about 280 ℃, the heat loss of the exhaust gas is about 35 percent, and the hot flue gas is discharged into the atmosphere after being treated, so that the great heat loss is caused. In order to control the temperature of the hot flue gas at the bottom 102 of the boiler to be not more than 800 ℃, excess air needs to be introduced into the hot flue gas mixing chamber 11, the value of the excess air coefficient is generally 2-2.5, and the heat loss of the excess air is carried out by the excess air by about 5% -8%. And the effective thermal efficiency of fuel combustion is low, for example, the effective thermal efficiency of gas and oil is about 53-61%; the effective thermal efficiency of the fire coal is about 43-48%.
Therefore, the traditional gypsum frying pan has lower heat utilization rate due to larger heat loss of exhaust smoke and larger excess air coefficient; in addition, the total heat utilization rate of the traditional boiler is very low due to the fuel combustion efficiency and the heat preservation loss.
It should be noted that about 35% of the exhaust heat of the traditional technology can adopt a "two-step" process for industrial byproduct gypsum, i.e. the process of drying first and then frying is used for secondary utilization, at the cost of increasing the investment of process equipment systems, increasing the power consumption and the cost of environmental protection treatment of flue gas. And the natural gypsum cannot utilize the heat of the exhausted smoke. And 5% -8% of excessive wind-heat loss in the traditional technology can not be avoided by natural gypsum and by-product gypsum fried powder.
4. The traditional gypsum frying pan has a complex furnace building system, so that the traditional gypsum frying pan has long preheating time when being taken out, and smoke channeling is caused due to damage of a flue caused by easy thermal expansion, the emission temperature of hot smoke is increased, and the heat utilization rate is further reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a gypsum frying pan using heat conduction oil or steam as a heat transfer medium is provided to reach the purpose of improving the single machine production scale and the thermal efficiency of gypsum frying pan, reducing or eliminating the risk of thermal burning loss.
The utility model provides a technical scheme that its technical problem adopted is: a gypsum frying pan using heat conduction oil or steam as a heat transfer medium comprises a pan body, a stirring device arranged in the pan body, and a discharging device arranged on the pan body; the pot body comprises a cylindrical pot wall and a pot bottom arranged at the bottom of the pot wall;
the bottom of the pot body is formed by welding steel plates in a splicing manner; the lower surface of the pan bottom is provided with a first heating device for heating the pan bottom; the first heating device is internally provided with a first heating channel for conveying heat conducting oil or steam;
a plurality of layers of second heating devices are arranged in the pot body from top to bottom; the second heating device comprises at least one second heating tube bundle.
Furthermore, at least one emergency discharge hole is arranged on the bottom of the pot body.
Further, the first heating device comprises a first heating pipe; the inner cavity of the first heating pipe forms the first heating channel.
Further, the cross section of the inner cavity of the first heating pipe is circular.
Furthermore, the outer surface of the first heating pipe is connected with the lower surface of the pan bottom in a welding manner.
Further, a heat-conducting metal layer used for connecting the pan bottom and the first heating pipe is poured on the lower surface of the pan bottom.
Further, the first heating device comprises a first half pipe welded on the lower surface of the pan bottom; and a space enclosed between the inner surface of the first half pipe and the lower surface of the corresponding position of the pan bottom forms the first heating channel.
Further, the first heating device comprises a jacket welded on the lower surface of the pan bottom; a space enclosed between the jacket and the pan bottom forms the first heating channel; the jacket is provided with a heat transfer medium inlet and a heat transfer medium outlet which are communicated with the first heating channel; and a plurality of connecting pieces for connecting the pan bottom and the jacket are arranged in the first heating channel.
The utility model has the advantages that:
1. the first heating device with the first heating channel inside is arranged on the lower surface of the pan bottom, so that heat conduction oil or steam can be used as a heat transfer medium to be conveyed into the first heating channel to heat the pan bottom. The working temperature of the heat conduction oil or the steam is far lower than that of the hot flue gas, so that the problem that the pot bottom is easily burnt by the hot flue gas in the prior art is solved, the requirements of the pot bottom on materials are reduced, the pot bottom can be formed by splicing and welding steel plates, and the defect that the pot bottom in the prior art is formed by casting special-shaped integral heat-resistant steel is overcome; not only reduced the manufacturing requirement and made the degree of difficulty, the bottom of a boiler can be made at job site concatenation moreover, has overcome among the prior art because the bottom of a boiler size surpasss conventional transportation limit and can't transport to job site's problem, makes the utility model discloses the improvement of the unit production scale of gypsum frying pan does not receive the restriction of making and transportation bottleneck.
2. Through setting up first heating device and second heating device, and then use conduction oil or steam as the heat transfer medium, compare as the heat transfer medium with the hot flue gas among the prior art, the utility model discloses a gypsum frying pan has thoroughly cancelled the complicated stove system of building to it is fast to play the pot, does not need the preheating time of overlength.
3. The utility model adopts heat conducting oil or steam as heat transfer medium, the temperature of the heat transfer medium is lower than 300 ℃, the pan body has no risk of any heat burning loss, and the safety of the frying pan is improved.
4. The utility model adopts heat conducting oil or steam as heat transfer medium, and the heat conducting oil or steam directly adopts the boiler to heat, compared with the hot flue gas in the prior art as heat transfer medium, the heat loss of the exhaust smoke can be reduced to within 8% from about 35% in the prior art due to the function of 'heat extraction' of the boiler; and the boiler does not need redundant excess air, and the heat supply of the boiler can be directly reduced by 5 to 8 percent. Therefore, compared with the prior art, the utility model discloses energy-conserving effect is: the energy is saved by about 40 to 43 percent for producing the building gypsum powder by using the natural gypsum raw material; for producing building gypsum powder by using industrial byproduct gypsum raw materials, the energy can be saved by 40-43% by adopting a one-step process of directly frying wet raw materials, and the energy can be saved by 55-8% by adopting a two-step process of drying firstly and frying secondly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below; it is obvious that the drawings in the following description are only some of the embodiments described in the present application, and that other drawings can be derived from these drawings by a person skilled in the art without inventive effort.
FIG. 1 is a schematic structural diagram of a conventional gypsum pan;
FIG. 2 is a schematic structural diagram of a gypsum pan using heat transfer oil or steam as a heat transfer medium according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a view from the direction B of FIG. 2;
fig. 5 and 6 are partial sectional views of the first heating device connected with the pan bottom in the embodiment of the present invention;
fig. 7 is another schematic structural diagram of the first heating device connected with the pan bottom in the embodiment of the present invention.
The reference numbers in the figures are: 10-pot body, 11-hot flue gas mixing chamber, 12-combustion chamber, 13-flue gas channel, 14-fire tube, 15-stirring device, 16-overflow tube, 101-pot wall, 102-pot bottom; 20-pot body, 21-stirring device, 22-discharging device, 23-first heating device, 24-first heating channel, 25-second heating device, 26-second heating tube bank, 27-emergency discharge outlet, 28-first heating tube, 29-heat conducting metal layer, 30-first half tube, 31-jacket, 32-heat conducting medium inlet, 33-heat conducting medium outlet, 34-connecting piece, 201-pot wall, 202-pot bottom, 203-pot cover, 221-overflow pipe and 222-discharging pipe.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. In case of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.
The first embodiment is as follows:
fig. 2 is a schematic structural diagram of a gypsum frying pan using heat conducting oil or steam as a heat transfer medium according to an embodiment of the present invention.
Referring to fig. 2, the gypsum frying pan using heat conducting oil or steam as a heat transfer medium provided by the embodiment of the present invention includes a pan body 20, a stirring device 21 disposed in the pan body 20, and a discharging device 22 disposed on the pan body 20; the pan body 20 comprises a cylindrical pan wall 201 and a pan bottom 202 arranged at the bottom of the pan wall 201;
the pan bottom 202 of the pan body 20 is formed by welding steel plates; a first heating device 23 for heating the pan bottom 202 is arranged on the lower surface of the pan bottom 202; a first heating channel 24 for conveying heat conducting oil or steam is arranged in the first heating device 23;
a plurality of layers of second heating devices 25 are arranged in the pot body 20 from top to bottom; the second heating means 25 comprise at least one second heating tube bundle 26.
The embodiment of the utility model provides an use gypsum frying pan of conduction oil or steam as heat transfer medium, including the pot body 20, agitating unit 21, discharging device 22, first heating device 23 and second heating device 25.
The pot body 20 comprises a cylindrical pot wall 201 and a pot bottom 202 arranged at the bottom of the pot wall 201, so that the pot body 20 is of a top opening structure. The pot wall 201 and the pot bottom 202 can be connected together in a welding mode, and can also be connected in other detachable modes such as flange bolt connection and the like. The pot wall 201 is a cylindrical structure made of a plate material, which may be a carbon steel plate or a stainless steel plate. The pan bottom 202 is a circular flat plate structure made of a plate material, which may be a carbon steel plate or a stainless steel plate. According to the size of the pan body 20, both the pan wall 201 and the pan bottom 202 can be formed by welding steel plates on site.
Of course, the pot body 20 may further include a pot cover 203 mounted on top of the pot wall 201. The pot cover 203 is at least provided with a feed inlet, a moisture discharge port and the like. The pot cover 203 and the pot wall 201 can be connected together in a welding mode, and can also be connected in other detachable modes such as flange bolt connection and the like. Through setting up pot cover 203, at first can set up agitating unit 21's support position on pot cover 203, and then support agitating unit 21 through pot cover 203, secondly can seal the open-top of pot wall 201, prevent to make the interior material of pot body 20 flow to the outside of pot body 20 from pot wall 201 top because the position of the material in the pot body 20 is less to the distance at pot wall 201 top.
The utility model discloses gypsum frying pan, the outside of the pot body 20 still is provided with carries out heat retaining heat preservation to the pot body 20, for simplifying the view, the heat preservation is not shown in the figure. The stirring device 21 is used for stirring the materials in the pot body 20, so that the materials are uniformly heated. The stirring device 21 comprises a vertical shaft, a stirring blade and a motor; the vertical shaft is vertically arranged and rotatably installed at the central position in the pot body 20; at least two groups of stirring blades for stirring materials are arranged on the vertical shaft; the motor is in transmission connection with the vertical shaft to drive the vertical shaft to rotate around the axis of the vertical shaft.
For example, the pot cover 203 is provided with a supporting seat, the vertical shaft is vertically arranged in the pot body 20, and the upper end of the vertical shaft is rotatably connected with the supporting seat; the motor is in transmission connection with the upper end of the vertical shaft so as to drive the vertical shaft to rotate around the axis of the vertical shaft; four groups of stirring blades are arranged on the vertical shaft from top to bottom. The stirring blades are paddle type stirring blades, the projection of each group of stirring blades on the horizontal plane is approximately in a straight line shape, and the projections of two adjacent groups of stirring blades on the horizontal plane are mutually vertical. A certain mounting gap is formed between the bottommost group of stirring blades and the pan bottom 202, in order to ensure that materials in the mounting gap are stirred, a coarse rigid chain is additionally hung on the bottommost group of stirring blades, the coarse rigid chain is driven to move through the stirring blades, and then the materials in the mounting gap are stirred, so that the materials are stirred no matter in the pan bottom and the pan, and the materials are uniformly heated.
The discharging device 22 is used for discharging the fried materials in the pot body 20. In the embodiment of the present invention, the discharging device 22 can be designed into different structures according to the discharging mode of the gypsum frying pan.
Three configurations of the discharging device 22 will be described as examples.
The first method comprises the following steps:
the discharging device 22 comprises an overflow pipe 221 with an inlet end arranged in the pot body 20 and an outlet end arranged outside the pot body 20. Referring to fig. 2, the inlet end of the overflow pipe 221 extends downward to a position close to the lowermost agitating blade. The part of the overflow pipe 221 positioned in the pot body 20 is arranged close to the pot wall 201, so that the stirring blades have a larger stirring range.
At this moment, the gypsum frying pan of the embodiment of the utility model is a continuous frying pan. During production, materials are continuously put into the pot body 20, according to the overflow principle, when the material level of the materials in the pot body 20 reaches the height of the outlet of the overflow pipe, the materials automatically overflow out through the overflow pipe 221, feeding and discharging are controlled to be balanced, the material level is kept unchanged, and the purpose of continuous production is achieved.
And the second method comprises the following steps:
the discharge device 22 comprises a discharge pipe 222 arranged at the lower end of the pot wall 201 or on the pot bottom 202.
At this moment, the gypsum frying pan of the embodiment of the utility model is an intermittent frying pan. During production, the material outlet pipe 222 is closed, the materials are fried in the pot body 20, after the materials in the pot body 20 are fried to be cooked, the material outlet pipe 222 is opened to completely discharge the materials in the pot body 20, and then the materials in the next pot are fried.
And the third is that:
the discharging device 22 comprises an overflow pipe 221 with an inlet end arranged in the pot body 20 and an outlet end arranged outside the pot body 20, and a discharging pipe 222 arranged at the lower end of the pot wall 201 or the pot bottom 202.
In the production process, when the overflow pipe 221 is used for discharging materials, the discharge pipe 222 should be controlled to be in a normally closed state, so that the gypsum wok is a continuous wok. When the process is carried out through the discharge pipe 222, the overflow pipe 221 is controlled to be in a normally closed pile body, and then the gypsum frying pan is in place.
The first heating device 23 is used for heating the pan bottom 202, and further heats the materials in the pan body 20 through the pan bottom 202. The first heating device 23 is installed on the lower surface of the pan bottom 202, and a first heating channel 24 for conveying heat conducting oil or steam is arranged inside the first heating device 23. During the production of gypsum, the heat conduction oil or steam heated to the set temperature is continuously conveyed into the first heating channel 24, the heat conduction oil or steam transfers the heat to the pan bottom 202 through the first heating device 23, the temperature of the pan bottom 202 is raised, and the materials in the pan body 20 are further heated through the pan bottom 202.
The second heating device 25 is used for heating the materials in the pot body 20. The second heating means 25 is provided with a plurality of layers from top to bottom, wherein a plurality of layers means at least two layers. The number of the second heating devices is set according to the height of the pan body 20 and the distance between the adjacent second heating devices, and is not particularly limited herein. For example, the stirring device 21 includes four groups of stirring blades installed on the vertical shaft from top to bottom, the second heating device 25 is provided with three layers, and a layer of second heating device 25 is provided between two adjacent groups of stirring blades.
The second heating means 25 comprise at least one second heating tube bundle 26. Fig. 2 and 3 show an embodiment of the second heating device 25, for example, the second heating device 25 includes two groups of second heating tube bundles 26 arranged oppositely left and right, the inlet end and the outlet end of each group of second heating tube bundles 26 pass through the pot wall 201 and extend to the outside of the pot body 20, and a channel for the stirring blades to pass through is arranged between the two groups of second heating tube bundles 26, and the stirring blades can be taken out from the channel when the equipment is overhauled. Preferably, the overflow pipe 221 is disposed in the above-mentioned channel.
Each group of second heating tube bundles 26 comprises at least one second heating tube, and the inner cavity of the second heating tube forms a second heating channel for conveying heat conducting oil or steam; the length and arrangement of each second heating pipe need to be set by integrating the heating area and the arrangement space in the pot body 20. The second heating pipe is a metal pipe, such as a carbon steel pipe, a stainless steel pipe, and the like.
For example, each group of the second heating tube bundles 26 includes five second heating tubes arranged one above the other, each second heating tube is arranged in a serpentine shape on the same plane, and the five second heating tubes in each group of the second heating tube bundles 26 may be connected in series to form one heating tube; of course, five second heating tubes in each second heating tube bank 26 may also be arranged in parallel, and their two ends are respectively communicated with the inlet header and the outlet header.
The second heating pipe may be a circular pipe whose inner and outer surfaces are both circular, a square pipe whose inner and outer surfaces are both square, an outer square inner circular pipe whose inner surface is circular and outer surface is square, an outer rectangular inner elliptical pipe whose inner surface is elliptical and outer surface is rectangular, or a pipe with other shapes.
During gypsum production, heat conduction oil or steam heated to a set temperature is conveyed to the inner cavity of the second heating tube bundle 26, the heat conduction oil or the steam transfers heat to the tube wall of the second heating tube bundle 26, and materials in the pot body 20 are heated through the tube wall of the second heating tube bundle 26. When steam is used as a heat transfer medium, the second heating pipe is preferably a round pipe with round inner and outer surfaces, so that the wall thickness of the second heating pipe can be reduced, the heat transfer efficiency can be improved, and the manufacturing cost of the gypsum frying pan can be reduced.
Take discharging device 22 as the continuous type frying pan of overflow pipe 221 as an example, adopt the utility model discloses the production process of gypsum frying pan production building gesso that the embodiment provided is:
starting the stirring device 21, continuously conveying heat conduction oil or steam heated to a set temperature into the first heating device 23 and the second heating device 25, and preheating the pot body 20; after preheating, begin to continuous feed in pot body 20, the material in the pot body 20 not only receives agitating unit 21's stirring, still receive the stirring of the produced vapor of material dehydration and hot circulating gas, and present the fluidization state, because the material in the pot body 20 keeps the constant temperature, the raw meal granule that gets into in the pot body 20 absorbs the heat immediately and dewaters rapidly, mature gypsum, calcined gypsum is gone out through the automatic overflow of overflow pipe 221, control feeding keeps balanced with the ejection of compact, make the material level keep unchanged, and then realize the continuous production of building gypsum powder.
When the heat conduction oil is used as a heat transfer medium, a factory needs to be provided with a heat conduction oil boiler matched with the heat conduction oil boiler, and the heat conduction oil boiler generates heat conduction oil with the temperature of 200-260 ℃. When steam is used as a heat transfer medium, a plant needs to be provided with a steam boiler matched with the steam boiler, and the steam boiler generates saturated steam or superheated steam with the pressure of 1-2 MPa generally.
The utility model discloses use gypsum frying pan of conduction oil or steam as heat transfer medium through the inside first heating device 23 that has first heating channel 24 of surface mounting under the bottom of a boiler 202, and then just can heat the bottom of a boiler 202 in carrying conduction oil or steam to first heating channel 24 as heat transfer medium. Because the working temperature of the heat conduction oil or the steam is not more than 300 ℃ and is far lower than the working temperature of the hot flue gas, the problem that the pot bottom 202 is easily burnt by the hot flue gas in the prior art is solved, the requirement of the pot bottom 202 on materials is reduced, and the pot bottom 202 can be formed by welding steel plates; and then overcome the defect that bottom of a boiler 202 must adopt the whole heat-resisting steel casting of dysmorphism to form among the prior art to form, not only reduced the manufacturing requirement and made the degree of difficulty, bottom of a boiler 202 can be made at on-the-spot concatenation moreover, has overcome among the prior art because bottom of a boiler 202 size surpasss conventional transportation limit and can't transport to the problem of job site, makes the utility model discloses the improvement of the unit production scale of gypsum frying pan does not receive the restriction of making and transportation bottleneck.
For example, the diameter of the pot body of a gypsum frying pan which is produced by more than 20 ten thousand tons in a single machine year reaches more than 5 meters, the gypsum frying pan which uses heat conduction oil or steam as a heat transfer medium provided by the embodiment of the utility model can divide the pot bottom 202 with the diameter of more than 5 meters into at least two parts, then all the parts of the pot bottom 202 are transported to a construction site by adopting a conventional transportation mode, and then all the parts of the pot bottom 202 are butt-welded to form the complete pot bottom 202 on the construction site.
The utility model discloses use heat conduction oil or steam as the gypsum frying pan of heat transfer medium through setting up first heating device 23 and second heating device 25, and then uses heat conduction oil or steam as the heat transfer medium, compares as the heat transfer medium with the hot flue gas among the prior art, the utility model discloses a gypsum frying pan has thoroughly cancelled the complicated stove system of building to it is fast to play the pot, does not need the preheating time of overlength.
The utility model adopts heat conducting oil or steam as heat transfer medium, the temperature of the heat transfer medium is lower than 300 ℃, the pan body 20 has no risk of any heat burning loss, and the safety of the frying pan is improved.
The utility model adopts heat conduction oil or steam as heat transfer medium, and the heat conduction oil or steam directly adopts the boiler to heat, compared with the hot flue gas in the prior art as heat transfer medium, the heat loss of the exhaust smoke can be reduced to within 8 percent by about 35 percent due to the heat extraction function of the boiler; and the boiler does not need redundant excess air, and the heat supply of the boiler can be directly reduced by 5 to 8 percent. Therefore, compared with the prior art, the utility model discloses an energy-conserving effect is obvious. The gypsum frying pan of the embodiment of the utility model takes the production of building gypsum powder by the byproduct gypsum as an example, and compared with the most energy-saving 'two-step process' in the prior art, the heat consumption of the production of ton powder is reduced by about 10%, and the power consumption is reduced by about 35%; taking the production of building gypsum powder by natural gypsum as an example, compared with the prior art, the heat consumption in ton powder production is reduced by about 40 percent, and the power consumption is basically the same.
For example, taking a byproduct gypsum raw material with 12% moisture as an example, a traditional gypsum frying pan and a two-step process for increasing equipment investment are adopted, and about 38.5m of natural gas is consumed for each ton of powder3(ii) a Adopt the gypsum frying pan of the embodiment of the utility model, only the ton powder needs to consume less than 35m of natural gas3. The price of the natural gas is 2.8 yuan/m3Calculate, adopt so the utility model discloses gypsum frying pan, 20 ten thousand tons of scale production lines reduce the heat cost every year and be 196 ten thousand yuan, can reduce the manufacturing cost of gesso by a wide margin.
Example two:
fig. 2 is a schematic structural diagram of a gypsum frying pan using heat conducting oil or steam as a heat transfer medium according to an embodiment of the present invention.
Referring to fig. 2, in the gypsum frying pan using heat conducting oil or steam as a heat conducting medium according to the embodiment of the present invention, at least one emergency discharge opening 27 is disposed on the bottom 202 of the pan body 20. For example, referring to fig. 4, two emergency discharge openings 27 are symmetrically arranged on the pan bottom 202.
In the gypsum frying pan using heat conduction oil or steam as a heat transfer medium of the embodiment of the utility model, the emergency discharge hole 27 is arranged on the pan bottom 202, and each emergency discharge hole 27 is sealed by the emergency discharge door in the normal production process; under special conditions such as normal shutdown or sudden power failure, the emergency discharge gate is opened, and the materials in the pot body 20 can be discharged from the emergency discharge port 27 in a short time.
The embodiment of the utility model provides an it can't set up the technical defect at bottom of a boiler 202 with urgent bin outlet 27 to have overcome, through setting up urgent bin outlet 27 on bottom of a boiler 202, has not only improved row's material speed, has reduced the volume of remaining of material in pot body 20 moreover. Compared with the prior art, the utility model discloses a with urgent bin outlet 27 setting on bottom of a boiler 202, when promptly arranging the material, can arrange away the stereoplasm foreign matter that contains in the gesso together, this is the function that traditional frying pan did not possess, adopts "one-step method" technology to the long-term industrial byproduct gypsum raw materials of stockpiling that can't guarantee not to contain the stereoplasm foreign matter and provides the possibility of actual production.
The number of the emergency discharge openings 27 is set by integrating the discharge speed, the strength of the pan bottom 202, and the arrangement space of the first heating device 23. The larger the number of emergency discharge openings 27, the faster the discharge speed in emergency discharge, but the less the strength of the pan bottom 202 and the smaller the space for arranging the first heating means 23. When the number of the emergency discharge openings 27 is larger, the strength of the pan bottom 202 can be improved by increasing the thickness of the pan bottom 202 or welding reinforcing ribs on the lower surface of the pan bottom 202.
Example three:
fig. 5 is a partial sectional view of the first heating device 23 connected to the pan bottom 202 according to the embodiment of the present invention.
Referring to fig. 5, in the gypsum frying pan using heat conducting oil or steam as a heat transfer medium according to the embodiment of the present invention, the first heating device 23 includes a first heating pipe 28; the inner cavity of the first heating tube 28 forms the first heating channel 24.
The first heating device 23 may include one first heating pipe 28, or may include at least two first heating pipes 28 arranged in parallel, which is not specifically limited herein. The length and arrangement of each first heating pipe 28 need to be set by combining the heating area and the arrangement space of the lower surface of the pan bottom 202.
For example, the first heating pipe 28 may be formed by bending a pipe; or a plurality of straight pipes and elbows are welded to form a pipe. The first heating pipe 28 may be disposed on the lower surface of the pan bottom 202 in a spiral shape, or may be disposed in a serpentine shape, or may be disposed in other arrangements, which are not limited in this respect. The first heating pipe 28 is a metal pipe, such as a carbon steel pipe, a stainless steel pipe, or the like.
The first heating pipe 28 may be a circular pipe whose inner and outer surfaces are circular, a square pipe whose inner and outer surfaces are square, an outer circular inner pipe whose inner surface is circular and outer surface is square, or an outer rectangular inner elliptical pipe whose inner surface is elliptical and outer surface is rectangular, or a pipe of other shapes, and is not limited specifically herein. Preferably, the cross-sectional shape of the inner cavity of the first heating tube 28 is circular.
The first heating pipe 28 and the pan bottom 202 can be connected by various connection methods.
For example, the outer surface of the first heating pipe 28 is welded to the lower surface of the pan bottom 202 and transfers heat through the weld metal therebetween, so that the weld metal therebetween should be uniform and continuous to ensure the joining performance and the heat transfer performance.
For example, the bottom surface of the pan bottom 202 is cast with a heat-conducting metal layer 29 for connecting the pan bottom 202 to the first heating pipe 28. By casting a heat-conducting metal layer 29 on the lower surface of the pan bottom 202, the pan bottom 202 is not only connected to the first heating pipe 28 via the heat-conducting metal layer 29, but also heat is transferred via the heat-conducting metal layer. The heat conducting metal layer 29 may be made of aluminum alloy, copper alloy, or the like. Taking the first heating pipe 28 as a circular pipe with round inner and outer surfaces as an example, the thickness of the heat-conducting metal layer 29 may be smaller than the outer diameter of the first heating pipe 28, may be equal to the outer diameter of the first heating pipe 28, or may be larger than the outer diameter of the first heating pipe 28.
Of course, the first heating pipe 28 and the pan bottom 202 may be connected through the weld metal and the heat-conducting metal layer 29 at the same time, so that heat is transferred through the weld metal and the heat-conducting metal layer 29 at the same time.
During gypsum production, heat conduction oil or steam heated to a set temperature is conveyed into the first heating channel 24 from one end of the first heating pipe 28, the heat conduction oil or steam transfers heat to the pipe wall of the first heating pipe 28, then the heat is transferred to the pot bottom 202 through the welding metal and/or the heat conduction metal layer 29, and then the heat is transferred to a material through the pot bottom 202. When steam is used as a heat transfer medium, the first heating pipe 28 is preferably a circular pipe with round inner and outer surfaces, so that the wall thickness of the first heating pipe 28 can be reduced, and the heat transfer efficiency can be improved.
Example four:
fig. 6 is another partial sectional view of the first heating device 23 connected to the pan bottom 202 according to the embodiment of the present invention.
Referring to fig. 6, in the gypsum pan using heat transfer oil or steam as a heat transfer medium according to the embodiment of the present invention, the first heating device 23 includes a first half pipe 30 welded to a lower surface of the pan bottom 202; the space enclosed between the inner surface of the first half pipe 30 and the lower surface of the pan bottom 202 at the corresponding position forms the first heating passage 24.
The length and arrangement of the first half-pipe 30 need to be set by integrating the heating area and the arrangement space of the lower surface of the pan bottom 202. As many first half pipes 30 as possible should be arranged in the arrangement space of the lower surface of the pan bottom 202, so that the pan bottom 202 can be uniformly heated, and the heating area is increased.
For example, the first half pipe 30 may be formed by bending one half pipe; or a plurality of half pipes and half pipe elbows are welded to form a half pipe. The first half-pipe 30 may be arranged on the lower surface of the pan bottom 202 in a spiral shape, or may be arranged in a serpentine shape, or may be arranged in other arrangements, which is not specifically limited herein. The first half pipe 30 is a metal pipe, such as a carbon steel pipe, a stainless steel pipe, or the like.
The first half pipe 30 is welded on the lower surface of the pan bottom 202, and the first heating channel 24 is formed by the space enclosed between the inner surface of the first half pipe 30 and the lower surface of the pan bottom 202 at the corresponding position. Referring to fig. 6, the first heating channel 24 has an arcuate cross-sectional shape. Of course, the cross-sectional shape of the first heating channel 24 may also be square, rectangular, etc., and is not limited in this respect.
During the production of gypsum, heat conduction oil or steam heated to a set temperature is conveyed into the first heating channel 24 from one end of the first half pipe 30, and the heat conduction oil or steam directly transfers heat to the material through the pot bottom 202. Because the heat conduction oil or the steam can directly transfer heat to the material through the pot bottom 202, compared with the embodiment, the heat transfer effect of the embodiment is better.
Example five:
fig. 7 is another schematic structural diagram of the first heating device 23 connected to the pan bottom 202 in the embodiment of the present invention.
Referring to fig. 7, in the gypsum frying pan using heat conducting oil or steam as a heat transfer medium according to the embodiment of the present invention, the first heating device 23 includes a jacket 31 welded to a lower surface of the pan bottom 202; the space enclosed between the jacket 31 and the pan bottom 202 forms the first heating channel 24; the jacket 31 is provided with a heat transfer medium inlet 32 and a heat transfer medium outlet 33 which are communicated with the first heating channel 24; a plurality of connecting pieces 34 for connecting the pan bottom 202 with the jacket 31 are arranged in the first heating channel 24.
The jacket 31 comprises a jacket bottom plate and a circle of jacket side plates, the upper ends of the jacket side plates are hermetically welded with the lower surface of the pan bottom 202, and the lower ends of the jacket side plates are hermetically welded with the side surfaces of the jacket bottom plate. This allows the space enclosed between the jacket 31 and the pan bottom 202 to form said first heating channel 24. The jacket 31 may be made of a carbon steel plate, a stainless steel plate, or the like.
A plurality of connecting pieces 34 are arranged in the first heating channel 24, and the connecting pieces 34 may be connecting pipes, connecting plates, etc. The upper end of the connecting piece 34 is connected with the pot bottom 202 in a welding way, and the lower end of the connecting piece 34 is connected with the jacket 31 in a welding way. The connecting pieces 34 are arranged to improve the connecting strength of the pan bottom 202 and the jacket 31 so as to prevent the pan bottom 202 and the jacket 31 from deforming in the gypsum production process. The number, arrangement, size, etc. of the connecting members 34 should be set according to the strength calculation, and are not particularly limited herein.
The embodiment of the utility model provides a be applicable to the lower heat transfer medium of pressure, in the course of the work, because the pressure of conduction oil is less than the pressure of steam, consequently, the embodiment of the utility model provides an in the preferred conduction oil that is preferred to the heat transfer medium.
During gypsum production, heat conduction oil heated to a set temperature is conveyed into the first heating channel 24 from the heat transfer medium inlet 32, the heat conduction oil directly transfers heat to materials through the pot bottom 202, and then the heat conduction oil is conveyed away from the heat transfer medium outlet 33. Because the conduction oil can directly transfer heat to the material through the pan bottom 202, the heat transfer effect of the embodiment is better compared with the embodiment.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A gypsum frying pan using heat conduction oil or steam as a heat transfer medium comprises a pan body (20), a stirring device (21) arranged in the pan body (20), and a discharging device (22) arranged on the pan body (20); the pan body (20) comprises a cylindrical pan wall (201) and a pan bottom (202) arranged at the bottom of the pan wall (201);
the pot is characterized in that the pot bottom (202) of the pot body (20) is formed by welding steel plates in a split welding manner; a first heating device (23) for heating the pan bottom (202) is arranged on the lower surface of the pan bottom (202); a first heating channel (24) for conveying heat conduction oil or steam is arranged in the first heating device (23);
a plurality of layers of second heating devices (25) are arranged in the pot body (20) from top to bottom; the second heating device (25) comprises at least one second heating tube bundle (26).
2. The gypsum frying pan using heat transfer oil or steam as a heat transfer medium according to claim 1, wherein at least one emergency discharge opening (27) is provided on the bottom (202) of the pan body (20).
3. The gypsum pan using heat transfer oil or steam as a heat transfer medium according to claim 1, wherein the first heating means (23) comprises a first heating pipe (28); the inner cavity of the first heating tube (28) forms the first heating channel (24).
4. The gypsum wok using heat transfer oil or steam as a heat transfer medium according to claim 3, wherein the cross-sectional shape of the inner cavity of the first heating pipe (28) is circular.
5. The gypsum wok using heat transfer oil or steam as a heat transfer medium according to claim 3, wherein the outer surface of the first heating pipe (28) is welded to the lower surface of the wok bottom (202).
6. The gypsum pan using heat transfer oil or steam as a heat transfer medium according to claim 3, 4 or 5, characterized in that the lower surface of the pan bottom (202) is cast with a heat transfer metal layer (29) for connecting the pan bottom (202) with the first heating pipe (28).
7. The gypsum pan using heat transfer oil or steam as a heat transfer medium according to claim 1, wherein the first heating means (23) comprises a first half pipe (30) welded to the lower surface of the pan bottom (202); the space enclosed between the inner surface of the first half pipe (30) and the lower surface of the corresponding position of the pan bottom (202) forms the first heating channel (24).
8. The gypsum pan using heat transfer oil or steam as a heat transfer medium according to claim 1, wherein the first heating means (23) comprises a jacket (31) welded to the lower surface of the pan bottom (202); the space enclosed between the jacket (31) and the pan bottom (202) forms the first heating channel (24); the jacket (31) is provided with a heat transfer medium inlet (32) and a heat transfer medium outlet (33) which are communicated with the first heating channel (24); a plurality of connecting pieces (34) for connecting the pan bottom (202) and the jacket (31) are arranged in the first heating channel (24).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022528485.5U CN213924532U (en) | 2020-11-04 | 2020-11-04 | Gypsum frying pan using heat conducting oil or steam as heat transfer medium |
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| CN202022528485.5U CN213924532U (en) | 2020-11-04 | 2020-11-04 | Gypsum frying pan using heat conducting oil or steam as heat transfer medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112341019A (en) * | 2020-11-04 | 2021-02-09 | 四川伴水石膏科技有限公司 | Gypsum frying pan using heat conducting oil or steam as heat transfer medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112341019A (en) * | 2020-11-04 | 2021-02-09 | 四川伴水石膏科技有限公司 | Gypsum frying pan using heat conducting oil or steam as heat transfer medium |
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