CN113670077A - Forced heat exchange system of high-temperature calcium carbide - Google Patents
Forced heat exchange system of high-temperature calcium carbide Download PDFInfo
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- CN113670077A CN113670077A CN202111075699.4A CN202111075699A CN113670077A CN 113670077 A CN113670077 A CN 113670077A CN 202111075699 A CN202111075699 A CN 202111075699A CN 113670077 A CN113670077 A CN 113670077A
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- calcium carbide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
- F27D15/0206—Cooling with means to convey the charge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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Abstract
The invention belongs to the technical field of energy conservation and emission reduction, and particularly relates to a forced heat exchange system for high-temperature calcium carbide. Airflow forced flow for giving off of heat energy in the carbide pot, with the air as the medium of heat transfer, low cost has, high durability and convenient use, advantages such as commonality are strong, in the structure in this scheme, the use is many spare parts comparatively ripe on the market, for example heat exchanger and blast fan etc. these spare parts are not only not fragile, long service life, also have the characteristics of easy to maintain and change simultaneously, and simultaneously, the heat recovery kiln of putting up can directly use the earth-rock structure to put up, and its cost is lower.
Description
Technical Field
The invention belongs to the technical field of energy conservation and emission reduction, and particularly relates to a forced heat exchange system for high-temperature calcium carbide.
Background
The main component of the calcium carbide is calcium carbide which is a white crystal and is also a basic raw material of organic synthetic chemical industry, the industrial product of the calcium carbide is a gray black block which has the conductive characteristic, and the higher the purity of the calcium carbide is, the better the conductivity is. The acetylene is immediately reacted violently when meeting water to generate acetylene and emit heat, so the environment of the calcium carbide is often stored in a dry environment.
The industrial production of calcium carbide generally uses an electric furnace smelting method, coke and calcium oxide are placed in an electric furnace for smelting to generate calcium carbide, the discharging temperature of the calcium carbide after production of the furnace is as high as 1800-2200 ℃, then the temperature is reduced to normal temperature, and the calcium carbide is crushed to calcium carbide small blocks with certain particle size by a crusher to be used as raw materials for producing acetylene gas. In the whole calcium carbide production process, the cooling process of the calcium carbide pot consumes long time, so that the production efficiency of the calcium carbide is very low. A large amount of waste heat of the high-temperature calcium carbide is directly dissipated to the natural environment without being utilized, so that not only is a large amount of heat energy lost, but also the operation environment of a production workshop is worsened.
Disclosure of Invention
In order to solve the problem that the high-temperature calcium carbide existing in the existing calcium carbide production technology is cooled slowly and heat energy is wasted, the scheme provides a forced heat exchange system for the high-temperature calcium carbide.
The technical scheme adopted by the invention is as follows:
a forced heat exchange system for high-temperature calcium carbide comprises:
the heat recovery kiln is internally provided with a kiln cavity; a kiln inlet and a kiln outlet are respectively arranged at two ends of the kiln cavity, and kiln doors capable of being opened and closed are respectively arranged at the kiln inlet and the kiln outlet;
the carbide pot is used for containing high-temperature carbide and can be moved into or out of the heat energy recovery kiln;
the air blower is used for air pressurization;
the side wall and the top wall of the kiln cavity are uniformly provided with a plurality of cold air pipes, and all the cold air pipes are connected with the blast fan;
each cold air pipe is connected with a plurality of jet flow nozzles, and the jet flow nozzles point to the calcium carbide in the calcium carbide pot, the outer wall of the calcium carbide pot and the calcium carbide transfer trolley and jet air flow;
and the other end of the kiln cavity is provided with a blast heat exchanger which is connected and communicated with the kiln cavity through a pipeline and is used for heat exchange of air in the kiln cavity.
The structure is utilized to cool and recover heat energy of the high-temperature calcium carbide, the high-temperature calcium carbide can be directly loaded into the calcium carbide pot and then transferred into the heat energy recovery kiln, the jet nozzle in the heat energy recovery kiln can spray air and force the air on the side surface of the calcium carbide pot and the surface of the calcium carbide to flow, the heat dissipation of the surface of the calcium carbide pot is accelerated, after the air is heated up, the air is forced to flow in a single direction in the arch-shaped channel and then flows into the blast heat exchanger through the pipeline, the recycling of the heat energy is realized, and the heat energy of the calcium carbide pot is rapidly recovered, so that the cooling of the high-temperature calcium carbide can be accelerated, and the production speed of the high-temperature calcium carbide can be increased; the heat recovery kiln has a heat preservation effect, so that the heat of the high-temperature calcium carbide is recycled, and the utilization rate of the heat is improved; in addition, the space in the heat recovery kiln is relatively closed, and the air in front of the air blower can be dried by drying equipment, so that the qualified product rate of the calcium carbide is improved.
As the alternative structure supplement design of the forced heat exchange system of the high-temperature calcium carbide in the scheme: laying a calcium carbide vehicle track on the ground of the kiln cavity, wherein the calcium carbide vehicle track extends out of the heat energy recovery kiln; and a calcium carbide transfer trolley matched with the calcium carbide trolley track is arranged on the calcium carbide trolley track, and can enter and exit the kiln cavity along the calcium carbide trolley track. The kiln cavity in the structure is arranged to be a straight-line-shaped channel structure, the calcium carbide pot can be conveyed into or moved out of the kiln cavity by using the calcium carbide transfer trolley, the newly discharged high-temperature calcium carbide is loaded into the calcium carbide pot, and then the calcium carbide pot is lifted onto the calcium carbide transfer trolley by the crown block or other lifting equipment, so that the production is facilitated, and the production efficiency is improved.
As the alternative structure supplement design of the forced heat exchange system of the high-temperature calcium carbide in the scheme: one or more carbide pot placing positions are arranged in the kiln cavity, cold air pipes are respectively arranged on the top wall, the left side wall, the right side wall and the ground of the kiln cavity at each carbide pot placing position, and a plurality of jet flow nozzles are respectively arranged on each cold air pipe; the jet nozzle is one or a combination of a tapered nozzle, a convergent-divergent nozzle, a slot nozzle, a duckbill nozzle and a spiral nozzle. The jet nozzle jet force is utilized to push the unidirectional flow of air in the kiln cavity, cold air pipes arranged on the top wall, the left side wall, the right side wall, the ground and the like of the kiln cavity are respectively connected with the jet nozzle, and the inlet of each cold air pipe can be fresh air or backflow air.
As the alternative structure supplement design of the forced heat exchange system of the high-temperature calcium carbide in the scheme: the cold air pipes positioned on the left side and the right side of each carbide pot placing position are jet flow vertical pipes, and jet flow nozzles arranged on the jet flow vertical pipes can jet air to the outer side surfaces of the carbide pots and the carbide transfer trolley. The jet nozzles positioned on the left side and the right side of the carbide pot placing position mainly blow and dissipate heat of the surface of the carbide pot, so that the heat dissipation speed of the carbide pot on the side surface is accelerated.
As the alternative structure supplement design of the forced heat exchange system of the high-temperature calcium carbide in the scheme: and the jet nozzle positioned at the lower end of the jet vertical pipe points to the calcium carbide transfer trolley and sprays air to the calcium carbide transfer trolley. After the calcium carbide pot is placed on the calcium carbide transfer trolley, heat at the bottom of the calcium carbide pot is transferred to the calcium carbide transfer trolley, and the calcium carbide transfer trolley can be subjected to air injection and heat dissipation through some jet nozzles, so that the cooling speed and the heat energy circulation speed of the calcium carbide transfer trolley are increased. Carbide pot belongs to an open-top's structure, set up the jet nozzle at kiln chamber top can be to the surperficial quick jet air current of high temperature carbide, in order to accelerate the cooling rate and the heat recovery speed of carbide, and because the upper surface cooling back of high temperature carbide, the refrigerated position can solidify the crust and produce a plurality of cracks, make the inside heat of high temperature carbide can dispel the heat through these cracks, improve radiating efficiency, and jet nozzle spun air current also can enter into these cracks, accelerate the cooling rate of high temperature carbide.
As the alternative structure supplement design of the forced heat exchange system of the high-temperature calcium carbide in the scheme: the jet flow nozzle (9) positioned above each calcium carbide pot placing position points to the calcium carbide pot (3) and can spray air to the surface of calcium carbide; the two ends of the kiln cavity are respectively provided with a kiln inlet and a kiln outlet, and kiln doors which can be opened and closed are arranged at the kiln inlet and the kiln outlet.
As the alternative structure supplement design of the forced heat exchange system of the high-temperature calcium carbide in the scheme: the automatic control device is electrically connected with the blower fan, can be a control switch for manually controlling starting and stopping or an automatic controller, is a relay, a PLC (programmable logic controller) or an integrated circuit, is connected with an operation panel and a detection component, and comprises a key, a knob, a keyboard or a touch screen; the monitoring component is a camera, a temperature sensor or a smoke monitoring sensor.
As the alternative structure supplement design of the forced heat exchange system of the high-temperature calcium carbide in the scheme: the blast heat exchanger is a heat utilization device or a heat exchanger, and the heat utilization device is a waste heat boiler or a dryer; when the blast heat exchanger is a heat exchanger, an inlet and an outlet of a cold material are arranged on the blast heat exchanger, and when the cold material passes through the blast heat exchanger, the cold material is heated and the heat is taken out of the blast heat exchanger, so that the heat energy is recycled.
As the alternative structure supplement design of the forced heat exchange system of the high-temperature calcium carbide in the scheme: the blower fan is a blade fan or a positive displacement fan, and comprises a centrifugal fan, an axial flow fan, a mixed flow fan or a screw fan; the air inlet side of the blast fan is provided with a dust remover which adopts a gravity dust remover, a cyclone dust remover, a bag-type dust remover or an electric dust remover.
A production method of high-temperature calcium carbide uses the calcium carbide heat energy recovery of the forced heat exchange system of the high-temperature calcium carbide.
The invention has the beneficial effects that:
1. according to the scheme, the heat energy recovery kiln is adopted to recover the heat energy of the high-temperature calcium carbide, so that the cooling speed of the calcium carbide can be increased, the production speed of the calcium carbide is increased, the heat energy of the high-temperature calcium carbide can be recycled, the energy conservation and consumption reduction are realized, and the requirement of environmental protection is met; the heat recovery kiln in the scheme can realize good heat recovery when the temperature of the calcium carbide is higher than 200 ℃; meanwhile, the kiln cavity in the heat recovery kiln is relatively closed, so that the qualified product rate of the produced calcium carbide is higher; the jet flow speed at the outlet of the jet flow nozzle is more than 1 m/s;
2. the scheme adopts forced airflow to accelerate the dissipation of heat energy in the carbide pot, and takes air as a heat exchange medium, so that the carbide pot has the advantages of low cost, convenience in use, high universality and the like;
3. the mode of utilizing surperficial air to flow cooling high temperature carbide with higher speed in this scheme can make the surface of high temperature carbide condense the crust and produce a large amount of cracks, and the inside heat of high temperature carbide can dispel the heat through these cracks for the cooling rate of high temperature carbide.
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.
Fig. 1 is a schematic structural diagram of a forced heat exchange system for high-temperature calcium carbide in the scheme;
fig. 2 is a side view of a forced heat exchange system for high-temperature calcium carbide in the scheme;
fig. 3 is a schematic structural diagram of another forced heat exchange system for high-temperature calcium carbide in the scheme;
fig. 4 is a side view of another forced heat exchange system for high-temperature calcium carbide in the scheme.
In the figure: 1-a calcium carbide vehicle track; 2-calcium carbide transfer trolley; 3-calcium carbide pan; 4-a heat energy recovery kiln; 5-blast air heat exchanger; 6-a blower fan; 7-jet flow vertical pipe; 8-jet flow horizontal pipe; 9-a jet nozzle; 10-a dust remover.
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings, and the described embodiments are only a part of the embodiments, but not all embodiments, and all other embodiments obtained by those skilled in the art without creative efforts will belong to the protection scope of the present solution based on the embodiments in the present solution.
Example 1
As shown in fig. 1 to 2, the embodiment designs a forced heat exchange system for high-temperature calcium carbide, which includes a heat recovery kiln 4, a calcium carbide pot 3, an air blower 6, a cold air pipe, a jet nozzle 9, an air blower heat exchanger 5, and the like.
A kiln cavity is arranged in the heat energy recovery kiln 4; the kiln wall of the heat energy recovery kiln 4 has a heat preservation function; kiln chamber in the heat recovery kiln 4 is the arch channel structure of a straight line to wearing around, being provided with respectively at the both ends in kiln chamber and going out the kiln mouth, all being provided with the kiln door that can switch in kiln mouth and going out kiln mouth department. And when the high-temperature calcium carbide is in the forced heat exchange process, closing the kiln door.
A calcium carbide car track 1 is laid on the ground of the kiln cavity, and the calcium carbide car track 1 extends out of the heat energy recovery kiln 4; the calcium carbide transfer trolley 2 matched with the calcium carbide trolley track 1 is arranged on the calcium carbide trolley track 1, and the calcium carbide transfer trolley 2 can enter and exit the kiln cavity along the calcium carbide trolley track 1. The calcium carbide transfer vehicle 2 can enter the kiln cavity of the heat energy recovery kiln 4 from one end of the kiln cavity along the calcium carbide vehicle track 1; or enters the heat energy recovery kiln 4 from the other end of the kiln chamber. The circulating cooling conveying of the high-temperature calcium carbide production line is facilitated.
The calcium carbide pot 3 is used for containing high-temperature calcium carbide and can be moved into or out of the heat energy recovery kiln 4; the newly discharged high-temperature calcium carbide can be directly loaded into the calcium carbide pot 3, then the calcium carbide pot 3 is hoisted to the calcium carbide transfer trolley 2 through hoisting equipment such as a crown block, and then the calcium carbide transfer trolley 2 moves the calcium carbide to the heat energy recovery kiln 4. The average diameter of the calcium carbide pot 3 is 1.4 meters, and the height is 0.8 meter.
One or more carbide pot placing positions are arranged in the kiln cavity, cold air pipes are uniformly arranged on the top wall, the left side wall, the right side wall and the ground of the kiln cavity at each carbide pot placing position, and a plurality of jet nozzles 9 are arranged on each cold air pipe; the jet nozzle 9 is one or a combination of more of a convergent nozzle, a convergent-divergent nozzle, a slot nozzle, a duckbill nozzle and a spiral nozzle. The unidirectional flow of air in the kiln cavity is pushed by the jet force of the jet nozzle 9, and the air is sprayed to the surface of the corresponding carbide pot 3, so that the cooling or heat dissipation process of the surface of the carbide pot 3 is accelerated.
In the cold blast pipe that arranges in the kiln intracavity, the cold blast pipe that is located every carbide pot and places a position left and right sides is efflux standpipe 7, and the vertical setting of efflux standpipe 7 installs the jet nozzle 9 on efflux standpipe 7 and can spray the air to carbide pot 3 and 2 lateral surfaces of carbide transfer car (buggy). The jet nozzles 9 positioned on the left side and the right side of the carbide pot placing position mainly blow air and dissipate heat to the surface of the carbide pot 3, so that the heat dissipation speed of the carbide pot 3 on the side surface is accelerated. And a jet nozzle 9 positioned at the lower end of the jet vertical pipe 7 points to the calcium carbide transfer trolley 2 and sprays air to the calcium carbide transfer trolley. After the carbide pot 3 is placed on the carbide transfer trolley 2, heat at the bottom of the carbide pot 3 is transferred to the carbide transfer trolley 2, and therefore some jet nozzles 9 point to the carbide transfer trolley 2 and jet the carbide transfer trolley 2 for heat dissipation, and the cooling speed and the heat energy circulation speed of the carbide are increased.
The jet nozzle 9 above each carbide pot placing position points to the carbide pot 3 and can spray air to the surface of the carbide. The surface opening of carbide, set up in the surface direct jet air current that jet nozzle 9 at kiln chamber top can be to high temperature carbide, and because the surface cooling back of high temperature carbide, the refrigerated position can take place to solidify the crust and produce a plurality of cracks, make the inside heat that does not give off of high temperature carbide can give off through these cracks, improve radiating efficiency, and the air current that jet nozzle 9 spun also can enter into these cracks in addition, effectively accelerate the cooling rate of high temperature carbide.
Each cold air pipe is connected with a plurality of jet flow nozzles 9, and the jet flow nozzles 9 point to the corresponding carbide pots 3 or carbide transfer vehicles 2 and jet air flow.
The air blower 6 is arranged at the right end of the kiln cavity, and the air blower 6 is mainly used for connecting and cooling the air pipe and pressurizing the air in the cooling air pipe; the blower 6 is a blade type blower or a positive displacement blower, including a centrifugal blower, an axial flow blower, a mixed flow blower or a screw blower. When the air blower 6 is started, air cooled by the air blower heat exchanger 5 is pressurized by the air blower 6 and then is reversely sent back to the kiln cavity of the heat energy recovery kiln 4, so that the circulating heat exchange of the air is realized.
The blast air heat exchanger 5 is connected and communicated with the other end of the kiln cavity through a pipeline, air in the kiln cavity of the heat energy recovery kiln 4 flows to the blast air heat exchanger 5 through the pipeline under the thrust action of the jet flow nozzle 9 which is obliquely arranged and the action of the internal positive pressure, heat exchange is carried out at the blast air heat exchanger 5, the air in the kiln cavity flows to the blast air heat exchanger 5 to carry out heat exchange, the temperature of the air subjected to heat exchange is reduced to 50-150 ℃, and then the air is pressurized by the blast air fan 6 and is reversely fed back to the cold air pipe through the pipeline. The blast heat exchanger 5 may be a heat consuming device, such as: waste heat boilers or dryers, etc.; the blast air heat exchanger 5 may also be a conventional heat exchanger. And the blast heat exchanger 5 is also provided with an inlet and an outlet of a cold material, and when the cold material passes through the blast heat exchanger 5, the cold material is heated and carries heat out of the blast heat exchanger 5, so that the heat energy is recycled. The blast heat exchanger 5 is one of a shell-and-tube heat exchanger, a finned tube heat exchanger, a threaded tube heat exchanger, a plate heat exchanger, a spiral plate heat exchanger and a heat pipe heat exchanger. The air inlet side of the blast fan 6 is provided with a dust remover 10 which adopts a gravity dust remover, a cyclone dust remover, a bag-type dust remover or an electric dust remover.
The structure in this embodiment is when using, put into heat recovery kiln 4 back with the high temperature carbide that just came out of the stove, then utilize air-blast fan 6 to carry out the pressure boost to the air, the air after the pressure boost reaches to arrange in kiln chamber lateral wall through the cold air duct, roof and subaerial jet nozzle 9 department, jet nozzle 9 sprays the air with 2 meters/second's wind speed towards carbide pot 3, make the air cool off carbide pot 3 surface, and the air that heaies up flows in heat recovery kiln 4 one-way, and reach in air-blast heat exchanger 5 through the pipeline at heat recovery kiln 4 left end department, air-blast heat exchanger 5 is after carrying out the heat exchange to the air, the hot-air after will cooling passes through dust remover 10 after dust removal, return air-blast fan 6 department, realize the circulation of air.
Example 2
As shown in fig. 3 to 4, the embodiment designs a forced heat exchange system for high-temperature calcium carbide, which includes a heat recovery kiln 4, a calcium carbide pot 3, an air blower 6, a cold air pipe, a jet nozzle 9, an air blower heat exchanger 5, and the like.
The heat energy recovery kiln 4 in this embodiment has the same structure as that in embodiment 1, and the arrangement of the cold air pipes and the jet nozzles 9 provided in the heat energy recovery kiln 4 is also the same as that in embodiment 1, and meanwhile, the heat energy exchanger in this embodiment may use the structure described in embodiment 1, or may use other structures, and when the heat energy exchanger is installed, the height of the installation position of the heat energy exchanger is higher than that of the heat energy recovery kiln 4 with the heat absorbing calandria.
The present embodiment is designed in a structure, which is greatly different from embodiment 1 in that: the air blast heat exchanger 5 is directly communicated with the air blast fan 6 without a pipeline, an air inlet of the air blast fan 6 in the embodiment is communicated with the atmospheric environment through a dust remover 10 and extracts air in the atmospheric environment, the air is dried and then introduced into a kiln cavity of the heat energy recovery kiln 4, the air is pressurized by the air blast fan 6 and then rapidly flows to a jet nozzle 9, the jet nozzle 9 sprays air towards the carbide pot 3 at a wind speed of 2 m/s to realize forced flow or jet heat exchange, the air flow flows along the length direction of the heat energy recovery kiln 4 after absorbing heat transmitted to the carbide pot 3 and the carbide pot 3 to the carbide transfer car 2 and reaches the air blast heat exchanger 5 through a pipeline at the left end of the heat energy recovery kiln 4, the air blast heat exchanger 5 purifies and filters the cooled hot air after exchanging heat with the air, and then discharged to the atmosphere. In the process, because the tail gas discharged by the blast air heat exchanger 5 also has a certain temperature, the heat energy recovery rate is lower than that of the circulating structure in the embodiment 1, and the cooling effect on the calcium carbide is better. Therefore, in the actual production process, the high-temperature calcium carbide just discharged from the furnace is cooled to a certain temperature, and then transferred to the thermal energy recovery kiln 4 of the present embodiment to be subjected to accelerated cooling.
The forced heat exchange system in this embodiment or embodiment 1 further includes a control device, the control device is electrically connected to the blower 6, the control device may be a control switch for manually controlling start and stop or an automatic controller, the automatic controller is a relay, a PLC or an integrated circuit, the automatic controller is connected to an operation panel and a detection component, and the operation panel includes a key, a knob, a keyboard or a touch screen; the monitoring component is a camera, a temperature sensor or a smoke monitoring sensor. The automatic controller controls the blower fan 6 through an operation panel and a detection part.
Example 3
The embodiment designs a production method of high-temperature calcium carbide, which uses the forced heat exchange system of high-temperature calcium carbide in the embodiment 1 or 2 to cool the calcium carbide or recover heat energy of the calcium carbide.
When the calcium carbide is industrially produced by an electric furnace smelting method, coke and calcium oxide are put into an electric furnace for smelting to generate calcium carbide. At the moment, the tapping temperature of the calcium carbide production furnace is as high as 1800-2200 ℃. For example, when the furnace tapping degree of the calcium carbide generally reaches 2000 ℃, the specific heat capacity is 0.264 kilocalories/kg. ℃, namely 1.1kJ/kg ℃, and the heat quantity is 522.7 kilocalories/kg, namely 2185 kJ/kg. The traditional cooling method of the high-temperature calcium carbide is that the calcium carbide is directly dragged to a cooling field by using an electric winch or a small handle in a row, natural cooling is carried out, in the cooling process, the calcium carbide is crusted from outside to inside in the pot to the strength which can bear the impact operation of turning over the pot and taking out the pot, a hoisting device such as a crown block is used for hoisting the calcium carbide pot 3 to impact a metal pier so that the calcium carbide lump is separated from the pot body, then the pot is turned over to take the calcium carbide lump out of the pot, and then stacking is carried out. In the cooling process of the high-temperature calcium carbide, because the heat conductivity coefficient of the calcium carbide is only 12.5W/m DEG C, the calcium carbide lump discharged from a pot is stacked in a cooling workshop for two to three days, and then can be cooled to normal temperature, and is crushed to small calcium carbide blocks with certain particle size by a crusher to be used as a raw material for producing acetylene gas. Meanwhile, a large amount of waste heat of the high-temperature calcium carbide is directly dissipated to the environment without being utilized, so that not only is a large amount of heat energy lost, but also the operation environment of a production workshop is worsened.
In the design of this embodiment, utilize the forced heat transfer system who uses the high temperature carbide in embodiment 1 or embodiment 2 simultaneously, pack the high temperature carbide into carbide pot 3, then transfer to heat recovery kiln 4 in, jet nozzle 9 in the heat recovery kiln 4 can spout the air and carry out forced cooling to the high temperature carbide, and when the high temperature carbide adopted the means of forced cooling, can solidify the crust and crack at the cooling surface of high temperature carbide. The surface of the high-temperature calcium carbide in the calcium carbide pot 3 naturally cracks after crusting to form cracks for heat dissipation, and cooling is accelerated; and when the high-temperature calcium carbide on the side wall and the bottom wall of the calcium carbide pot 3 crusts and cracks, the high-temperature calcium carbide inside the high-temperature calcium carbide crusts and cracks flows along the crack, and then the high-temperature calcium carbide cooling effect is accelerated. Meanwhile, compared with the system in the embodiment 2, the system in the embodiment 1 has a higher heat recovery utilization rate, and the cooling speed of the high-temperature calcium carbide is slower, so that the high-temperature calcium carbide pot 3 can be transferred to the heat recovery kiln 4 in the embodiment 1 firstly in the cooling process of the high-temperature calcium carbide, and then the high-temperature calcium carbide is transferred to the heat recovery kiln 4 in the embodiment 2 after being reduced to a specified temperature.
The above examples are given for clarity of illustration only and are not intended to limit the embodiments; and are neither required nor exhaustive of all embodiments. And obvious variations or modifications of this technology may be resorted to while remaining within the scope of the technology.
Claims (10)
1. A forced heat exchange system of high-temperature calcium carbide is characterized in that: the method comprises the following steps:
the heat recovery kiln (4), the heat recovery kiln (4) is internally provided with a kiln cavity; a kiln inlet and a kiln outlet are respectively arranged at two ends of the kiln cavity, and kiln doors capable of being opened and closed are respectively arranged at the kiln inlet and the kiln outlet;
the carbide pot (3), the carbide pot (3) is used for holding the high-temperature carbide and can be moved into or out of the heat energy recovery kiln (4);
the air blower (6) is used for air pressurization;
the side wall and the top wall of the kiln cavity are uniformly provided with a plurality of cold air pipes, and all the cold air pipes are connected with a blast fan (6);
the cooling device comprises jet flow nozzles (9), wherein each cold air pipe is connected with a plurality of jet flow nozzles (9), and the jet flow nozzles (9) point to the calcium carbide in the calcium carbide pot (3), the outer wall of the calcium carbide pot (3) and the calcium carbide transfer trolley (2) and jet air flow;
and the other end of the kiln cavity is provided with a blast air heat exchanger (5), and the blast air heat exchanger (5) is connected and communicated with the kiln cavity through a pipeline and is used for heat exchange of air in the kiln cavity.
2. The forced heat exchange system for high-temperature calcium carbide according to claim 1, wherein: a calcium carbide car track (1) is laid on the ground of the kiln cavity, and the calcium carbide car track (1) extends out of the heat energy recovery kiln (4); the calcium carbide transfer trolley (2) matched with the calcium carbide trolley track (1) is arranged on the calcium carbide trolley track (1), and the calcium carbide transfer trolley (2) can enter and exit the kiln cavity along the calcium carbide trolley track (1).
3. The forced heat exchange system for high-temperature calcium carbide according to claim 1, wherein: one or more carbide pot placing positions are arranged in the kiln cavity, cold air pipes are respectively arranged on the top wall, the left side wall, the right side wall and the ground of the kiln cavity at each carbide pot placing position, and a plurality of jet nozzles (9) are respectively arranged on each cold air pipe; the jet nozzle (9) is one or a combination of more of a convergent nozzle, a convergent-divergent nozzle, a slot nozzle, a duckbill nozzle and a spiral nozzle.
4. The forced heat exchange system for high-temperature calcium carbide according to claim 3, wherein: the cold air pipes positioned on the left side and the right side of each carbide pot placing position are jet flow vertical pipes (7), and jet flow nozzles (9) arranged on the jet flow vertical pipes (7) can jet air to the outer side faces of the carbide pots (3) and the carbide transfer trolley (2).
5. The forced heat exchange system for high-temperature calcium carbide according to claim 4, wherein: and the jet nozzle (9) positioned at the lower end of the jet vertical pipe (7) points to the calcium carbide transfer trolley (2) and sprays air to the calcium carbide transfer trolley.
6. The forced heat exchange system for high-temperature calcium carbide according to claim 3, wherein: the jet nozzle (9) positioned above each calcium carbide pot placing position points to the calcium carbide pot (3) and can spray air to the surface of the calcium carbide.
7. The forced heat exchange system for high-temperature calcium carbide according to claim 1, wherein: the automatic control device is electrically connected with the blower fan (6), can be a control switch for manually controlling starting and stopping or an automatic controller, is a relay, a PLC (programmable logic controller) or an integrated circuit, is connected with an operation panel and a detection component, and comprises a key, a knob, a keyboard or a touch screen; the monitoring component is a camera, a temperature sensor or a smoke monitoring sensor.
8. The forced heat exchange system for high-temperature calcium carbide according to claim 1, wherein: the blast heat exchanger (5) is a heat-using device or a heat exchanger, and the heat-using device is a waste heat boiler or a dryer; when the blast heat exchanger (5) is a heat exchanger, an inlet and an outlet of a cold material are arranged on the blast heat exchanger (5), and when the cold material passes through the blast heat exchanger (5), the cold material is heated and the heat is taken out of the blast heat exchanger (5), so that the heat energy is recycled.
9. The forced heat exchange system for high-temperature calcium carbide according to claim 1, wherein: the blower fan (6) adopts a blade fan or a positive displacement fan, and comprises a centrifugal fan, an axial flow fan, a mixed flow fan or a screw fan; a dust remover (10) is arranged on the air inlet side of the blast fan (6), and the dust remover (10) adopts a gravity dust remover, a cyclone dust remover, a bag-type dust remover or an electric dust remover.
10. A production method of high-temperature calcium carbide is characterized by comprising the following steps: the calcium carbide heat energy recovery method using the high-temperature calcium carbide forced heat exchange system of any one of claims 1 to 9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116499261A (en) * | 2023-04-14 | 2023-07-28 | 合肥合意环保科技工程有限公司 | Comprehensive energy utilization device for calcium carbide production cooling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116499261A (en) * | 2023-04-14 | 2023-07-28 | 合肥合意环保科技工程有限公司 | Comprehensive energy utilization device for calcium carbide production cooling |
| CN116499261B (en) * | 2023-04-14 | 2023-10-13 | 合肥合意环保科技工程有限公司 | Comprehensive energy utilization device for calcium carbide production cooling |
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