Method and structure for energy-saving and stable control of gas stove and cooperation with oven

Abstract

This invention discloses a method and structure for energy-saving and stable co-heating of a gasifier. The method uses hot air generated from gas heat exchange with adjacent operating gasifiers to heat the gasifier, achieving stable temperature control and energy saving during the heating process. The method includes the following steps: Step 1, initial heating: Hot air generated from gas heat exchange is blown into the air chamber of the gasifier, controlling the airflow. The initial heating duration is 12 hours, and the heating rate is controlled at 10℃ / h, raising the furnace temperature from 30℃ to 150℃. Step 2: Maintain the furnace temperature at 150℃; Step 3: Secondary heating, controlling the heating rate at 10℃ / h, with a secondary heating duration of 25 hours, raising the furnace temperature of the gas furnace from 150℃ to 400℃; Step 4: Maintain the furnace temperature at 400℃ and hold it at this temperature for 35 hours; This invention is beneficial for the baking of gas furnaces, enabling controllability and stability of the baking process, improving the quality of gas furnace baking, and replacing existing liquefied gas furnace baking methods, thus achieving energy-saving effects.

Description

Technical Field

[0001] This invention relates to a method and structure for energy-saving and stable control of gas furnace drying, belonging to the field of gas furnace drying technology. Background Technology

[0002] Before a gasifier can be put back into operation after shutdown for maintenance and refueling, it needs to be baked. The purpose of baking is to remove moisture from the fuel and allow it to sinter and solidify before it can be used in high-temperature environments. Current technology involves connecting a liquefied petroleum gas (LPG) ignition pipe to the blower pipe in the gasifier's air chamber, using LPG for ignition, and generating heat through combustion to bake the furnace.

[0003] While the existing device can serve the purpose of furnace drying, the applicant found during use that the temperature of furnace drying using liquefied petroleum gas (LPG) ignition is unstable. The drying process requires intermittent heating and temperature maintenance at a certain level. Therefore, the highly fluctuating LPG ignition method is not conducive to controlling a stable temperature rise, and the temperature maintenance during the holding phase is also unstable. This is detrimental to the drying of the gas furnace, and the fluctuating drying temperature also affects the durability of the gas furnace. Furthermore, LPG ignition for furnace drying is energy-intensive and costly.

[0004] Therefore, there is a need for a technology that enables energy-saving and stable control of gas furnaces during the co-fired furnace drying process, thereby improving the drying quality of gas furnaces and replacing existing liquefied gas furnaces with energy-saving effects. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a method and structure for energy-saving and stable co-operated furnace drying of a gas furnace, which can achieve controllability and stability of furnace drying, improve the drying quality of the gas furnace, and replace the existing liquefied gas furnace drying, with the advantages of low cost and good energy-saving effect; it can overcome the shortcomings of the prior art.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] This invention discloses a method for energy-saving and stable control of gas furnace co-heating. This method uses hot air generated from gas heat exchange between adjacent operating gas furnaces to heat the gas furnace, replacing the method of liquefied petroleum gas (LPG) ignition for heating. This achieves stable temperature control and energy saving during the heating process. The method includes the following steps: Step 1, initial heating: Gas heat exchange is performed between adjacent operating gas furnaces. The hot air generated from the gas heat exchange is blown into the gas furnace requiring heating for hot air heating. The airflow is controlled, and the initial heating time is 12 hours. Step 1: Control the heating rate at 10℃ / h to raise the furnace temperature of the gasifier from 30℃ to 150℃; Step 2: Maintain the furnace temperature at 150℃ for 48 hours; Step 3: Perform a second heating, controlling the air volume and the heating rate at 10℃ / h for 25 hours, to raise the furnace temperature of the gasifier from 150℃ to 400℃; Step 4: Maintain the furnace temperature at 400℃ for 35 hours; Step 5: Put the gasifier into operation or cool it down.

[0008] In the aforementioned hot air oven, the hot air is released through the manhole in the furnace.

[0009] The structure of this energy-saving and stable co-operated gas furnace includes a gas furnace requiring drying and an adjacent, operating gas furnace. The gas furnace has a combustion chamber and a wind chamber, and a gas exhaust pipe is located at the top of the gas furnace. The gas exhaust pipe is connected to a primary heat exchange device, which has a cold air inlet pipe and a hot air exhaust pipe. The hot air exhaust pipe is connected to the wind chamber of the gas furnace. A blower is installed on the cold air inlet pipe. A connecting pipe and a gas valve are located between adjacent hot air exhaust pipes.

[0010] As mentioned above, the inner walls of the air chamber and combustion chamber are provided with high-temperature resistant furnace charge for heat insulation and protection of the outer shell.

[0011] As mentioned above, the gas after the first heat exchange is connected to a secondary heat exchange device through a pipeline for reuse of residual heat.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This invention utilizes hot air generated by gas heat exchange in adjacent operating gasifiers for furnace baking. By controlling the airflow during the initial heating, secondary heating, and heat preservation processes, stable heating can be achieved, and temperature stability can be maintained during heat preservation. This enables temperature controllability, allowing adjustment of the furnace baking temperature and heating rate as needed, resulting in better furnace baking effect and better stability control. It solves the technical problems of unstable and uncontrollable temperature caused by liquefied gas ignition in existing technologies.

[0014] 2. By using hot air generated from gas exchange with adjacent operating gas furnaces to dry the furnace, instead of using liquefied petroleum gas for furnace drying, energy saving can be achieved, which is conducive to saving production costs.

[0015] 3. The inner walls of the air chamber and combustion chamber are equipped with high-temperature resistant furnace materials for heat insulation and protection of the outer shell; in order to avoid damage to the castable and refractory bricks caused by rapid heating, the newly constructed inner lining must be baked before the first operation to avoid damage to the gasifier.

[0016] 4. The gas after the first heat exchange is connected to a secondary heat exchange device through a pipeline for reuse of its residual heat. This allows the waste heat of the gas after the first heat exchange to be utilized.

[0017] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will now be described in further detail with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the connection structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of an existing liquefied gas ignition and baking furnace.

[0021] The components include: 1. Gas furnace; 2. Combustion chamber; 3. Air chamber; 4. Gas pipe; 5. Primary heat exchange device; 6. Cold air inlet pipe; 7. Hot air pipe; and 8. Blower. Detailed Implementation

[0022] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0023] like Figure 1 As shown, this invention discloses a method for energy-saving and stable control of gas furnace co-heating. This method uses hot air generated from gas heat exchange in an adjacent operating gas furnace to heat the gas furnace, replacing the method of liquefied petroleum gas ignition for heating. This achieves stable temperature control and energy saving during the heating process. The method includes the following steps:

[0024] Step 1, initial heating: the adjacent operating gas furnace is used for gas heat exchange. The hot air generated by the gas heat exchange is blown into the gas furnace 1 that needs to be baked, and the air volume is controlled. The initial heating time is 12 hours, and the heating rate is controlled at 10℃ / h, raising the furnace temperature of gas furnace 1 from 30℃ to 150℃.

[0025] Step 2: Maintain the furnace temperature at 150℃ and keep it at this temperature for 48 hours.

[0026] Step 3, secondary heating, control the air volume, control the heating rate to 10℃ / h, the secondary heating time is 25 hours, and raise the furnace temperature of gas furnace 1 from 150℃ to 400℃.

[0027] Step 4: Maintain the furnace temperature at 400℃ and keep it at this temperature for 35 hours.

[0028] Step 5: Put into operation or cool down.

[0029] The hot air oven is vented from the manhole in the furnace chamber.

[0030] The structure of this energy-saving and stable co-operated gas furnace includes a gas furnace 1 that needs to be heated and an adjacent gas furnace 1 that is currently in operation. The gas furnace 1 is equipped with a combustion chamber 2 and a wind chamber 3. A gas exhaust pipe 4 is provided at the upper end of the gas furnace 1. The gas exhaust pipe 4 is connected to a primary heat exchange device 5. The primary heat exchange device 5 is equipped with a cold air inlet pipe 6 and a hot air exhaust pipe 7. The hot air exhaust pipe 7 is connected to the wind chamber 3 of the gas furnace 1. A blower device 8 is provided on the cold air inlet pipe 6. A connecting pipe and a gas valve are provided between adjacent hot air exhaust pipes 7.

[0031] Furthermore, the inner walls of the wind chamber 3 and the combustion chamber 2 are provided with high-temperature resistant furnace charge for heat insulation and protection of the outer shell. Because the operating temperature of the wind chamber 3 and the combustion chamber 2 is high, the outer shell of the wind chamber 3 and the combustion chamber 2 is easily burned. In this way, the high-temperature resistant furnace charge can provide protection.

[0032] Furthermore, the gas after the first heat exchange is connected to a secondary heat exchange device through a pipeline for reuse of its residual heat, thus making use of the residual heat of the gas after the first heat exchange.

[0033] In use, hot air generated by gas heat exchange in the adjacent operating gasifier 1 is used to heat the gasifier 1. This allows for stable heating during the initial heating, secondary heating, and heat preservation stages by controlling the hot air volume, and maintains temperature stability during heat preservation. This achieves temperature controllability, allowing for adjustment of the heating temperature and heating rate as needed, resulting in better heating effects. It solves the technical problems of unstable and uncontrollable temperature caused by liquefied gas ignition in existing technologies. Furthermore, by utilizing the gas generated in the gasifier 1 system for heat exchange, the gas from the system itself can be incorporated into the entire heating process, achieving energy savings. More importantly, hot air heating ensures continuous heating, solving the problem of interrupted heating caused by intermittent or extinguished heating in existing liquefied gas heating systems, resulting in better stability and controllability.

[0034] In terms of performance, the original oven drying method consumes about 60 bottles of liquefied petroleum gas (450 yuan / bottle) per oven drying, and also requires the operation of a blower and personnel supervision. However, hot air oven drying can save about 40,000 yuan per oven drying.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments without departing from the technical solution of the present invention and based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method for energy-saving and stable control of a gas furnace in a coordinated baking process, characterized in that: This method uses hot air generated from gas heat exchange with adjacent operating gasifiers to bake the gasifiers, replacing the method of baking with liquefied petroleum gas (LPG) ignition, thereby achieving stable temperature control and energy saving during the baking process. It includes the following steps: Step 1, initial heating: gas heat exchange is performed on the adjacent gas furnace that is in operation. The hot air generated by the gas heat exchange is blown into the gas furnace (1) that needs to be baked, and the hot air is baked. The air volume is controlled. The initial heating time is 12 hours and the heating rate is controlled at 10℃ / h. The furnace of the gas furnace (1) is heated from 30℃ to 150℃. Step 2: Maintain the furnace temperature at 150℃ and keep it at this temperature for 48 hours. Step 3, secondary heating, control the air volume, control the heating rate to 10℃ / h, the secondary heating time is 25 hours, and raise the furnace of the gas furnace (1) from 150℃ to 400℃; Step 4: Maintain the furnace temperature at 400℃ and keep it at this temperature for 35 hours. Step 5: Put into operation or cool down.

2. The method for energy-saving and stable control of a gas furnace with coordinated furnace drying according to claim 1, characterized in that: The hot air oven is vented from the manhole in the furnace chamber.

3. A structure for a gas furnace with energy-saving and stable control and coordinated drying, comprising a gas furnace (1) requiring drying and an adjacent and operating gas furnace (1), wherein a combustion chamber (2) and a wind chamber (3) are provided on the gas furnace (1), and a gas exhaust pipe (4) is provided at the upper end of the gas furnace (1), characterized in that: The gas pipe (4) is connected to the primary heat exchange device (5). The primary heat exchange device (5) is provided with a cold air inlet pipe (6) and a hot air pipe (7). The hot air pipe (7) is connected to the air chamber (3) of the gas furnace (1). A blower (8) is provided on the cold air inlet pipe (6). Between adjacent hot air pipes (7), there is a connecting pipe and a gas valve.

4. The structure of the gas furnace energy-saving and stable control co-heating furnace according to claim 3, characterized in that: The inner walls of the air chamber (3) and the combustion chamber (2) are provided with high-temperature resistant furnace charge for heat insulation and protection of the outer shell.

5. The structure of the gasifier furnace with energy-saving and stable control and coordinated baking according to claim 3, characterized in that: The gas after the first heat exchange is connected to a secondary heat exchange device through a pipeline for reuse of residual heat.

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