CN211939020U - Preheating type ladle roaster - Google Patents
Preheating type ladle roaster Download PDFInfo
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- CN211939020U CN211939020U CN202020328495.1U CN202020328495U CN211939020U CN 211939020 U CN211939020 U CN 211939020U CN 202020328495 U CN202020328495 U CN 202020328495U CN 211939020 U CN211939020 U CN 211939020U
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Abstract
The utility model provides a preheating-type ladle roaster relates to the ladle and toasts heating technical field, has solved the heat accumulation style ladle roaster that exists among the prior art and need use the heat accumulation body material, and is with high costs, easy jam, and can only preheat the technical problem that leads to combustion efficiency low to a medium in gas or the air. This ladle roaster includes the be built by contract, combustor and preheating device, the combustor can run through the be built by contract, preheating device installs on the be built by contract, preheating device's quantity is the same with the kind quantity of the required burning medium of ladle roaster, preheating device includes heat transfer casing and the heat transfer body that is located the heat transfer casing, the heat transfer body import can be passed through the be built by contract and ladle intercommunication, the import of heat transfer casing is linked together with a burning medium that corresponds, hot flue gas carries out the heat exchange with burning medium in preheating device, the heat transfer body export is linked together with exhaust pipe, the export of heat transfer casing is linked together so that the burning medium after the heat transfer intensifies gets into the combustor with the combustor.
Description
Technical Field
The utility model relates to a ladle toasts the heating technical field, especially relates to a preheating-type ladle roaster.
Background
Most of present ladle roaster use gas and air be normal atmospheric temperature state, and the temperature is lower, leads to microthermal gas and air combustion reaction insufficient among the combustion process, and the calorific value energy that gas itself contains can not be by abundant combustion utilization, leads to combustion efficiency low, and the gas energy is extravagant serious, and use cost is high.
Due to low combustion efficiency of fuel gas, the flame temperature and the flame rigidity are insufficient, the baking heating effect on the steel ladle is poor, the baking time is long, the use turnover time of the steel ladle is prolonged, and the use efficiency is low. After the ladle baking time is long, a series of cost increases such as personnel, equipment, energy, power and the like are caused.
Also some steel mills are currently using a heat accumulation body type ladle roaster, and the heat accumulation body type roaster must use a ceramic heat accumulation body material to accumulate heat in advance, and then can realize the purpose of preheating combustion air. The heat accumulation body type roaster must use two sets of heat accumulation bodies to alternately accumulate and release heat, namely, one set of heat accumulation body is used for absorbing redundant heat emitted when the roaster burns in a steel ladle at the same time, and the other set of heat accumulation body heats combustion air passing through the heat accumulation body per se by releasing heat. When the temperature of the heat storage body for releasing heat is reduced to a certain temperature, the reversing valve between the two heat storage bodies performs reversing action, so that the two heat storage bodies perform exchange under the action of the reversing valve, and the heat storage bodies perform reciprocating operation in a circulating way.
The applicant has found that the prior art has at least the following technical problems:
(1) the existing heat storage type ladle roaster can only preheat one medium of fuel gas or air, namely, preheat fuel gas or preheat air;
(2) the heat storage type roaster has the advantages that the heat storage body material made of ceramic materials is required to absorb and store heat, the cost of the heat storage body material is high, the heat storage body material needs to be replaced regularly, and the use and maintenance cost is high;
(3) the heat accumulator material is easy to adsorb impurities, oil stains and the like in the fuel gas, and gaps among heat accumulator particles are easy to block; gas or air is heated by the heat accumulator particles in the process of flowing in gaps among the heat accumulator particles, and once the gaps are blocked, the passing rate of the gas or the air is influenced, so that flame is weakened until the flame is extinguished, and the baking effect is influenced;
(4) the heat accumulator material is made of ceramic, and the ceramic heat accumulator material can crack due to frequent cold and heat alternation, so that a gas or air channel is blocked, and flame is extinguished;
(5) the heat accumulation type roaster has high requirement on automation due to the need of continuous reversing operation, and has complex design, thus leading to higher failure rate;
(6) due to the addition of the heat accumulator material, the heat accumulator type roaster has heavier self weight, high requirement on lifting systems such as a winch and the like, increased cost and increased potential safety hazard.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a preheating-type ladle roaster to solve the heat accumulation style ladle roaster that exists among the prior art and need use the heat accumulation body material, with high costs, easily block up, and can only preheat a medium in gas or the air and lead to the technical problem that combustion efficiency is low. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a preheating type ladle roaster, which comprises a ladle cover, a burner and a preheating device, wherein the burner can penetrate through the ladle cover, the preheating device is arranged on the ladle cover, wherein the number of the preheating devices is the same as the type number of the combustion media required by the ladle roaster, the preheating device comprises a heat exchange shell and a heat exchange body positioned in the heat exchange shell, an inlet of the heat exchange body of the preheating device can be communicated with the ladle through the ladle cover so as to receive hot flue gas generated by the combustion of the burner in the ladle, the inlet of the heat exchange shell is communicated with a corresponding combustion medium, the hot flue gas and the combustion medium exchange heat in the preheating device, the outlet of the heat exchange body is communicated with the exhaust pipeline, and hot flue gas after heat exchange is exhausted through the exhaust pipeline, and the outlet of the heat exchange shell is communicated with the combustor so that the combustion medium subjected to heat exchange and temperature rise enters the combustor.
Preferably, the preheating device is a heat exchanger, the heat exchanger is a shell-and-tube heat exchanger, and the heat exchange body is a heat transfer tube.
Preferably, the preheating device is a heat exchanger, the heat exchanger is a plate heat exchanger, and the heat exchange body is a heat conduction plate.
Preferably, the number of the preheating devices is two, and the preheating devices are respectively a gas preheating device and a combustion-supporting air preheating device, the gas preheating device and the combustion-supporting air preheating device are both installed on the covering, an inlet of a heat exchange shell of the gas preheating device is communicated with a gas pipeline, and an inlet of a heat exchange shell of the combustion-supporting air preheating device is communicated with a combustion-supporting air pipeline.
Preferably, the gas preheating device and the combustion-supporting air preheating device are respectively located on two sides of the burner and are arranged close to the burner.
Preferably, the end face, facing the steel ladle, of the ladle cover is provided with a plurality of hot flue gas collecting holes, two communicating pipes are arranged inside the ladle cover, part of the hot flue gas collecting holes are communicated with one of the communicating pipes, the rest of the hot flue gas collecting holes are communicated with the other communicating pipe, and the communicating pipes are communicated with the heat exchange body inlet of the corresponding preheating device.
Preferably, the hot flue gas collecting holes are uniformly arranged at intervals along the circumferential direction of the ladle cover and are close to the outer edge of the ladle cover.
Preferably, the preheating device is connected with the ladle cover and the burner through pipelines.
Preferably, an induced draft fan is arranged on the exhaust pipeline.
Preferably, the material of the heat exchange body is stainless steel metal or copper.
The utility model provides a preheating-type ladle roaster, including the be built by contract, combustor and preheating device, the combustor can run through the be built by contract, preheating device installs on the be built by contract, preheating device's quantity is the same with the kind of the required burning medium of ladle roaster, preheating device includes heat transfer casing and the heat transfer body that is located the heat transfer casing, preheating device's heat transfer body import can be through the be built by contract and the ladle intercommunication in order to receive the combustor in the ladle burning hot flue gas that produces, the import of heat transfer casing is linked together with a burning medium that corresponds, hot flue gas carries out the heat exchange with burning medium in preheating device, the hot flue gas after the heat transfer body export is linked together and the heat transfer is discharged through exhaust pipe, the export of heat transfer casing is linked together so that the burning medium after the heat transfer heaies up gets into the combustor. Compared with the prior art, this preheating-type ladle roaster can preheat the temperature of combustion medium (gas and air) in order to improve gas and air for the combustor simultaneously through the preheating device who sets up to make gas and air combustion reaction in the combustion process more abundant, release more heat through flame, reach and improve the effect of burning, improvement combustion efficiency. The preheating device in the preheating type ladle roaster improves and strengthens combustion, and accelerates the combustion process of a combustion medium after gas or air in the corresponding preheating device enters the combustor, so that the combustor is ensured to stably combust in a ladle; and secondly, as the combustion efficiency of the fuel gas and the air is improved, the combustion flame is longer and more rigid, the flame temperature is higher, the baking effect on the steel ladle is further improved, the baking time is shortened, the use turnover time of the steel ladle is shortened, and the production efficiency is 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 is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a front view of a preheating type ladle roaster according to an embodiment of the present invention;
fig. 2 is a top view of a preheating ladle roaster according to an embodiment of the present invention;
fig. 3 is a side view of a preheating ladle roaster according to an embodiment of the present invention.
Reference numerals: 1. covering; 2. a burner; 3. a gas preheating device; 4. a combustion-supporting air preheating device; 5. a frame; 6. a rotating assembly; 7. a hot flue gas collection aperture; 8. a gas pipeline; 9. a combustion-supporting air duct.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a preheating type ladle roaster, including a ladle cover 1, a burner 2 and a preheating device, the burner 2 can penetrate the ladle cover 1, the preheating device is installed on the ladle cover 1, the ladle cover 1 is installed on a frame 5 through a rotation assembly 6, wherein, the number of the preheating device is the same as the number of the types of burning media required by the ladle roaster, the preheating device includes a heat exchange housing and a heat exchange body located in the heat exchange housing, the heat exchange body inlet of the preheating device can be communicated with the ladle through the ladle cover 1 for receiving the hot flue gas generated by the burner 2 burning in the ladle, the inlet of the heat exchange housing is communicated with a corresponding burning medium for receiving the corresponding burning media (gas and air), the hot flue gas and the burning medium exchange heat in the preheating device, the temperature of the burning medium entering the burner 2 is raised by the heat of the hot flue gas, the outlet of the heat exchange body is communicated with the exhaust pipeline, hot flue gas after heat exchange can be exhausted through the exhaust pipeline, and the outlet of the heat exchange shell is communicated with the combustor 2 so that combustion media after heat exchange and temperature rise enter the combustor 2. This preheating-type ladle roaster can preheat 2 required burning medium (gas and air) of combustor simultaneously through the preheating device who sets up with the temperature that improves gas and air, burning medium entering combustor 2 after the heat transfer intensifies to make the gas and the air combustion reaction in the combustion process more abundant, thereby release more heat through flame, reach the effect that improves and strengthen burning, improve combustion efficiency.
The preheating device in this embodiment is a heat exchanger, which may be a shell-and-tube heat exchanger or a plate heat exchanger. If the heat exchanger adopts a shell-and-tube heat exchanger, the heat exchange body is a heat transfer pipe and is arranged in a plurality of beams in parallel in the transverse direction, hot flue gas generated by combustion flows through the heat transfer pipe, and combustion media flow through the space between the outer wall of the heat transfer pipe and a shell of the heat exchanger; if the heat exchanger adopts a plate heat exchanger, the heat exchange bodies are heat conduction plates and are longitudinally arranged in multiple rows, hot smoke generated by combustion flows through the interior of the heat conduction plates, and combustion media flow through the exterior of the heat conduction plates. The heat exchange body (heat transfer pipe or heat conduction plate) is preferably made of metal with high heat conductivity coefficient, such as stainless steel metal or copper, and the heat exchange body has a thin wall thickness, so that heat can be transferred more quickly, and the time for preheating the combustion medium is shortened.
The heat exchanger in the embodiment preferably adopts a shell-and-tube heat exchanger, which comprises a heat exchange shell and a heat transfer tube positioned in the heat exchange shell, wherein a tube side inlet (a heat exchange body inlet) of the heat exchanger is communicated with a steel ladle through a ladle cover 1, used for receiving hot flue gas generated by the combustion of the burner 2 in the ladle, the shell side inlet (inlet of the heat exchange shell) of the heat exchanger is communicated with a corresponding combustion medium, the preheating device is used for receiving combustion media, hot flue gas and the combustion media exchange heat in the preheating device, the temperature of the combustion media entering the combustor 2 is improved by utilizing the heat of the hot flue gas, a tube side outlet (a heat exchange body inlet) of the heat exchanger is connected with an exhaust pipeline, the hot flue gas after heat exchange is discharged through the exhaust pipeline, a shell side outlet (an inlet of a heat exchange shell) of the heat exchanger is connected with the combustor 2, and the combustion media after heat exchange and temperature rise enter the combustor 2, so that the purpose of improving the combustion efficiency is achieved. It should be noted that the hot flue gas does not contact with the combustion medium in the heat exchanger, and the flow direction is opposite, so as to fully exchange heat through the stainless steel plate or the pipe between the two.
In the practical application process, consider that the burning medium that current ladle roaster used is gas and air, so the utility model provides a preheating device's quantity design is two, is gas preheating device 3 and combustion-supporting wind preheating device 4 respectively, and gas preheating device 3 and combustion-supporting wind preheating device 4 are all installed on be built by contract 1, and preferably, gas preheating device 3 and combustion-supporting wind preheating device 4 are located the both sides of combustor 2 respectively and are close to combustor 2 and set up to in the installation. Specifically, a shell side inlet of the gas preheating device 3 is communicated with a gas pipeline 8, a shell side outlet of the gas preheating device 3 is communicated with the burner 2, a tube side inlet of the gas preheating device 3 can be communicated with the steel ladle through the ladle cover 1, and a tube side outlet of the gas preheating device 3 is communicated with an exhaust pipeline; the shell side inlet of the combustion-supporting air preheating device 4 is communicated with a combustion-supporting air pipeline 9, the shell side outlet of the combustion-supporting air preheating device 4 is communicated with the burner 2, the tube side inlet of the combustion-supporting air preheating device 4 can be communicated with the steel ladle through the ladle cover 1, and the tube side outlet of the combustion-supporting air preheating device 4 is communicated with an exhaust pipeline.
As the embodiment of the utility model provides an optional embodiment, be provided with a plurality of hot flue gas collection hole 7 on the terminal surface of be provided with on 1 ladle of be built by contract, the inside of be built by contract 1 is provided with two communicating pipes, and hole 7 is collected to partial hot flue gas and one of them communicating pipe intercommunication, and remaining hot flue gas collection hole 7 communicates with another communicating pipe, and a communicating pipe is linked together with gas preheating device 3's heat exchanger import, and another communicating pipe then is linked together with combustion-supporting wind preheating device's heat exchanger import. Preferably, the hot flue gas collecting holes 7 are evenly spaced in the circumferential direction of the ladle cover 1 and are located close to the outer edge of the ladle cover 1. The hot flue gas collecting hole 7 at the edge of the ladle cover 1 can form micro negative pressure at the edge of the ladle cover 1, flame is collected along the ladle wall to the hot flue gas collecting hole 7 from the ladle bottom, heat transfer to the ladle wall is fully completed, baking efficiency of the steel ladle is greatly improved, meanwhile, the temperature of the edge of the steel ladle is greatly reduced, the phenomenon of flame overflow is not easy to occur, and the service life of the ladle cover 1 is prolonged.
As the embodiment of the utility model provides an optional embodiment, preheating device all is connected through the pipeline with be built by contract 1, combustor 2, in addition, has still set up the induced air fan on the blast pipe way, improves the flow velocity of hot flue gas to promote heat exchange efficiency.
Compared with the prior art, the utility model provides a preheating-type ladle roaster has cancelled the design and the heat accumulator material of switching-over valve, change the heat transfer part of combustor both sides into the principle of heat exchanger, and convenient for operation, the heat exchanger through setting up can preheat the temperature of combustor with combustion medium (gas and air) in order to improve gas and air simultaneously, thereby make gas and the air combustion reaction in the combustion process more abundant, release more heat through flame, reach and improve and strengthen the burning, improve combustion efficiency's effect. The preheating device in the preheating type ladle roaster improves and strengthens combustion, and accelerates the combustion process of a combustion medium after fuel gas or air in the corresponding preheating device enters the combustor, so that the combustor is ensured to stably combust in a ladle. And secondly, as the combustion efficiency of the gas and the air is improved, the combustion flame is longer and more rigid, the flame temperature is higher, the baking effect on the steel ladle is further improved, the baking time is shortened, the use turnover time of the steel ladle is shortened, the production efficiency is improved, and meanwhile, after the rigidity and the temperature of the combustion flame are improved, the occurrence of fire cutoff and flameout accidents is also reduced.
The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A preheating type ladle roaster is characterized by comprising a ladle cover, a burner and a preheating device, wherein the burner can penetrate through the ladle cover, the preheating device is arranged on the ladle cover, wherein,
the preheating device comprises a heat exchange shell and a heat exchange body positioned in the heat exchange shell, wherein the inlet of the heat exchange body of the preheating device can be communicated with the ladle through the ladle cover so as to receive hot smoke generated by the combustion of the burner in the ladle, the inlet of the heat exchange shell is communicated with a corresponding combustion medium, the hot smoke can exchange heat with the combustion medium in the preheating device, the outlet of the heat exchange body is communicated with the exhaust pipeline, the hot smoke after heat exchange can be exhausted through the exhaust pipeline, and the outlet of the heat exchange shell is communicated with the burner so that the combustion medium after heat exchange and temperature rise enters the burner.
2. The preheating-type ladle roaster according to claim 1, wherein the preheating device is a heat exchanger, the heat exchanger is a shell-and-tube heat exchanger, and the heat exchange body is a heat transfer tube.
3. The preheating ladle roaster according to claim 1, wherein the preheating device is a heat exchanger, the heat exchanger is a plate heat exchanger, and the heat exchange body is a heat conducting plate.
4. The preheating-type ladle roaster according to claim 1, wherein the preheating device is two in number, and is respectively a gas preheating device and a combustion-supporting air preheating device, the gas preheating device and the combustion-supporting air preheating device are both mounted on the ladle cover, an inlet of a heat exchange housing of the gas preheating device is communicated with a gas pipeline, and an inlet of a heat exchange housing of the combustion-supporting air preheating device is communicated with a combustion-supporting air pipeline.
5. The preheating-type ladle roaster according to claim 4, wherein the gas preheating device and the combustion air preheating device are respectively located at both sides of the burner and are disposed adjacent to the burner.
6. The preheating-type ladle roaster according to claim 4, wherein a plurality of hot flue gas collecting holes are formed on the end surface of the ladle cover facing the ladle, two communicating pipes are arranged inside the ladle cover, part of the hot flue gas collecting holes are communicated with one of the communicating pipes, the rest of the hot flue gas collecting holes are communicated with the other communicating pipe, and the communicating pipes are communicated with the heat exchange body inlet of the corresponding preheating device.
7. The preheating ladle roaster according to claim 6, wherein the hot flue gas collecting holes are uniformly spaced along the circumferential direction of the ladle cover and are located near the outer edge of the ladle cover.
8. The preheating-type ladle roaster of claim 1, wherein the preheating device is connected to the ladle cover and the burner through a pipeline.
9. The preheating-type ladle roaster according to claim 1 or 8, wherein an induced draft fan is provided on the exhaust duct.
10. The preheating ladle roaster according to claim 1, wherein the heat exchanging body is made of stainless steel or copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020328495.1U CN211939020U (en) | 2020-03-16 | 2020-03-16 | Preheating type ladle roaster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020328495.1U CN211939020U (en) | 2020-03-16 | 2020-03-16 | Preheating type ladle roaster |
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| CN211939020U true CN211939020U (en) | 2020-11-17 |
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| CN202020328495.1U Active CN211939020U (en) | 2020-03-16 | 2020-03-16 | Preheating type ladle roaster |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113732278A (en) * | 2021-08-31 | 2021-12-03 | 武汉科虹工业炉有限公司 | Self-preheating ladle baking device with high-speed jet flow heat exchange |
| CN113814383A (en) * | 2021-08-31 | 2021-12-21 | 武汉科虹工业炉有限公司 | Self-preheating tundish baking device with high-speed jet flow heat exchange function |
| CN114713808A (en) * | 2022-05-10 | 2022-07-08 | 江苏省镔鑫钢铁集团有限公司 | Oxygen-enriched ladle baking device and ladle baking method thereof |
-
2020
- 2020-03-16 CN CN202020328495.1U patent/CN211939020U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113732278A (en) * | 2021-08-31 | 2021-12-03 | 武汉科虹工业炉有限公司 | Self-preheating ladle baking device with high-speed jet flow heat exchange |
| CN113814383A (en) * | 2021-08-31 | 2021-12-21 | 武汉科虹工业炉有限公司 | Self-preheating tundish baking device with high-speed jet flow heat exchange function |
| CN113732278B (en) * | 2021-08-31 | 2022-12-16 | 武汉科虹工业炉有限公司 | Self-preheating ladle baking device with high-speed jet flow heat exchange |
| CN113814383B (en) * | 2021-08-31 | 2022-12-16 | 武汉科虹工业炉有限公司 | Self-preheating tundish baking device with high-speed jet flow heat exchange function |
| CN114713808A (en) * | 2022-05-10 | 2022-07-08 | 江苏省镔鑫钢铁集团有限公司 | Oxygen-enriched ladle baking device and ladle baking method thereof |
| CN114713808B (en) * | 2022-05-10 | 2023-06-06 | 江苏省镔鑫钢铁集团有限公司 | Oxygen-enriched baking device and baking method thereof |
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