CN210861061U - Boiler combustion preheating device - Google Patents
Boiler combustion preheating device Download PDFInfo
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- CN210861061U CN210861061U CN201921838372.6U CN201921838372U CN210861061U CN 210861061 U CN210861061 U CN 210861061U CN 201921838372 U CN201921838372 U CN 201921838372U CN 210861061 U CN210861061 U CN 210861061U
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- air supply
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- conveying channel
- supply pipe
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model discloses a boiler combustion preheating device, the utility model discloses a: the system comprises a heat exchanger, a front air supply pipe, a rear air supply pipe, a front flue gas pipe, a rear flue gas pipe, a fan, a flow valve, a coal conveying channel, 2 temperature measuring meters and a boiler. The utility model utilizes the high temperature flue gas generated after the coal of the boiler is burnt, and then heats the fresh air through the heat exchanger, and then preheats the coal by utilizing the heated air, so that the coal has certain temperature when entering the hearth of the boiler, and the combustion is easier; meanwhile, 2 temperature meters are used for monitoring the temperature in the preheating process of the coal, and the temperature is controlled through the action of a fan and a flow valve, so that the temperature in the preheating process is always in a safe range; the air entering the boiler furnace through the coal conveying channel also has a certain temperature, which also promotes the combustion of coal in the boiler. The utility model provides a preheat faster, can promote burning, combustion state coal in the furnace chamber to account for than higher, produce heat great, heat make full use of, safe and reliable's boiler combustion preheating device.
Description
Technical Field
The utility model relates to a boiler equipment field especially relates to boiler combustion preheating device.
Background
As is known, although not common, boilers are closely related to the life of people, and the daily life of people cannot be separated from boilers, for example: the boiler is related to water, electricity, heating and the like in daily life of people, and therefore, the boiler leaves resources which are easily obtained or available in the daily life of people, and many normal lives are difficult to carry out.
The boiler plays an important role in the life of people, is widely applied in other fields, plays an important role in the fields of ships, locomotives, industrial and mining enterprises, industrial production and the like, is a necessary heat source in industrial production, is filled with medium water to form steam so as to drive other equipment to work and provide production power, and can be used for some products at high temperature in the fields of chemical engineering, oil refining, light industry and the like, so that the boiler provides the necessary heat source for the products; in steam locomotive, steam hammer, ship and other equipment, the boiler has steam power function to drive the equipment. Therefore, boilers are indispensable in many fields.
Boilers are important indispensable equipment in many industries and fields, and therefore, the efficient operation of the boilers is of great significance to the implementation of related work. However, the current boiler structure still has room for improvement, and has some defects: in present most coal fired boiler furnace, coal gets into the back, show that the heat that utilizes the combustion to produce in the furnace heats coal, reach the uniform temperature after, again under the effect of flame the ignition burning, the exhaust of burning out at last, this just makes only partly real heat supply that burns of coal in the furnace, heat the coal that just gets into furnace, need spend time and occupy furnace space, consume the heat that the furnace burning produced simultaneously, be unfavorable for the boiler burning energy supply, influence combustion efficiency, combustion state coal accounts for than low in the furnace, the extravagant scheduling problem of heat. Need to be improved upon
In summary, boilers play an important role in many industries and fields, and the existing boilers do have some disadvantages, so a boiler combustion preheating device which can preheat more quickly, promote combustion, has a higher combustion state coal occupation ratio in a hearth, generates more heat and makes full use of the heat is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems that the combustion state coal accounts for the ratio is low, the preheating is slow, the heat is wasted and the heat production amount is remained to be improved in the hearth of the existing boiler, and providing a boiler combustion preheating device which can preheat more quickly, can promote the combustion, can lead the combustion state coal to account for the ratio in the hearth to be higher, lead the heat production amount to be larger, fully utilize the heat, and is safe and reliable.
The utility model discloses the technical scheme who adopts: a boiler combustion preheating device, comprising: the device comprises a heat exchanger, a front air supply pipe, a rear air supply pipe, a front flue gas pipe, a rear flue gas pipe, a fan, a flow valve, a coal conveying channel, 2 temperature measuring meters and a boiler, wherein the heat exchanger is a main heat exchange preheating part of the device and is respectively connected with the front air supply pipe, the rear air supply pipe, the front flue gas pipe and the rear flue gas pipe; two ends of the front air supply pipe are respectively connected with the air supply fan and the heat exchanger, and the front air supply pipe is provided with a flow valve; the rear air supply pipe is respectively connected with the heat exchanger and the coal conveying channel, and a temperature measuring meter is arranged on the rear air supply pipe; two ends of the front flue gas pipe are respectively connected with the boiler and the heat exchanger; one end of the rear flue gas pipe is connected with the heat exchanger, and the other end of the rear flue gas pipe is an exhaust end for exhausting flue gas; the air supply fan is connected with the front air supply pipe and is a variable frequency fan; the flow valve is installed on the front air supply pipe; the coal conveying channel is a coal supply device of the boiler, the coal conveying channel is connected with the boiler, meanwhile, a temperature measuring meter is also arranged on the coal conveying channel, and the top of the front end of the coal conveying channel is connected with a rear air supply pipe; the two temperature measuring meters are respectively arranged on the rear air supply pipe and the coal conveying channel, and the specific installation positions are respectively that one temperature measuring meter is arranged on the rear air supply pipe close to the coal conveying channel, and the other temperature measuring meter is arranged on the top of the coal conveying channel and close to the boiler; the boiler is respectively connected with the front flue gas pipe and the coal conveying channel.
Furthermore, the coal conveying channel comprises a heat insulation shell and a conveying device, the heat insulation shell is the outer layer of the coal conveying channel, the conveying device is arranged in the heat insulation shell, the conveying device conveys coal, and the heat insulation shell conducts heat insulation.
Furthermore, the rear air supply pipe penetrates through the heat-insulating shell of the coal conveying channel and is inserted into the coal conveying channel, and in the coal conveying channel, the outlet of the rear air supply pipe faces the coal conveying direction.
The utility model discloses a scene concrete implementation function step as follows:
step (I): air heating, wherein high-temperature flue gas generated by boiler combustion is conveyed to a heat exchanger through a front flue gas pipe, fresh air is conveyed to the heat exchanger through a front air supply pipe by a fan, heat of the high-temperature flue gas is transferred to low-temperature air through the heat exchanger, so that the temperature of the low-temperature air is raised, and the air is heated;
step (II): preheating coal, namely after air is heated by a heat exchanger, discharging flue gas through a rear flue gas pipe, transmitting the air to a coal conveying channel through a rear air supply pipe, and transferring heat to the coal through convection in the process of conveying the coal to a boiler to preheat the coal;
step (three): preheating regulation, monitoring the temperature in the coal conveying channel through the readings of the two temperature measuring meters, controlling the temperature within a safety range of 110-140 ℃, increasing the air quantity through the adjustment of the air supply fan and the flow valve when the temperatures displayed by the two temperature measuring meters are higher than the temperature displayed by the two temperature measuring meters, reducing the air quantity through the adjustment of the air supply fan and the flow valve when the temperatures displayed by the two temperature measuring meters are lower than the temperature displayed by the two temperature measuring meters, and increasing the temperature within the coal conveying channel within the safety range.
The utility model has the advantages that: (1) the air is heated by using the flue gas after the combustion of the boiler, so that the combustion heat is fully utilized, and the waste of heat is avoided; (2) the coal is preheated, so that the coal has a certain temperature when entering the boiler hearth, the preheating time in the hearth is shortened, and meanwhile, the air entering the boiler hearth through the coal conveying channel has a certain temperature, so that the coal preheating is accelerated, the combustion is promoted, the combustion is faster, and the efficiency is higher; (3) because the coal is preheated, the coal can be quickly combusted after entering the hearth of the boiler, the occupation ratio of the coal in a combustion state in the hearth is improved, the combustion rate is increased, and the heat production is improved; (4) the temperature in the coal conveying channel is monitored at any time through the temperature measuring table, and the temperature is controlled within a certain range through the air supply fan and the flow valve, so that the coal is prevented from being combusted in the coal conveying channel, and the coal conveying device is safe and reliable.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the coal conveying passage of the present invention.
In the figure: 1-heat exchanger, 2-front air supply pipe, 3-rear air supply pipe, 4-front flue gas pipe, 5-rear flue gas pipe, 6-air supply machine, 7-flow valve, 8-coal conveying channel, 9-thermometer I, 10-thermometer II, 11-boiler, 12-heat-insulating shell and 13-conveying device.
The specific implementation mode is as follows:
the present invention will be described in detail with reference to the accompanying drawings and specific examples.
As shown in the figure, the utility model discloses a device includes: the device comprises a heat exchanger 1, a front air supply pipe 2, a rear air supply pipe 3, a front flue gas pipe 4, a rear flue gas pipe 5, an air supply machine 6, a flow valve 7, a coal conveying channel 8, a temperature measuring meter I9, a temperature measuring meter II 10 and a boiler 11, wherein the heat exchanger 1 is a main heat exchange preheating part of the device and is respectively connected with the front air supply pipe 2, the rear air supply pipe 3, the front flue gas pipe 4 and the rear flue gas pipe 5; two ends of the front air supply pipe 2 are respectively connected with the air supply machine 6 and the heat exchanger 1, and the front air supply pipe 2 is provided with a flow valve 7; the rear air supply pipe 3 is respectively connected with the heat exchanger 1 and the coal conveying channel 8, and a first temperature measuring meter 9 is installed on the rear air supply pipe 3; two ends of the front flue gas pipe 4 are respectively connected with the boiler 11 and the heat exchanger 1; one end of the rear flue gas pipe 5 is connected with the heat exchanger 1, and the other end of the rear flue gas pipe is an exhaust end for exhausting flue gas; the air supply fan 6 is connected with the front air supply pipe 2, and the air supply fan 6 is a variable frequency fan; the flow valve 7 is installed on the front air supply pipe 2; the coal conveying channel 8 is a coal supply device of a boiler, the coal conveying channel 8 is connected with a boiler 11, meanwhile, the coal conveying channel 8 is also provided with a second temperature measuring meter 10, and the top of the front end of the coal conveying channel 8 is connected with the rear air supply pipe 3; the first temperature measurement meter 9 and the second temperature measurement meter 10 are respectively arranged on the rear air supply pipe 3 and the coal conveying channel 8, the specific installation positions are respectively that the first temperature measurement meter 9 is arranged at the position, close to the coal conveying channel 8, of the rear air supply pipe 3, and the second temperature measurement meter 10 is arranged at the top of the coal conveying channel 8 and close to the boiler 11; the boiler 11 is respectively connected with the front flue gas pipe 4 and the coal conveying channel 8.
Further, the coal conveying channel 8 comprises a heat insulation shell 12 and a conveying device 13, the heat insulation shell 12 is an outer layer of the coal conveying channel 8, the conveying device 13 is arranged in the heat insulation shell 12, the conveying device 13 conveys coal, and the heat insulation shell 12 conducts heat insulation.
Furthermore, the rear air supply pipe 3 passes through the heat preservation shell 12 of the coal conveying channel 8 and is inserted into the coal conveying channel 8, and in the coal conveying channel 8, the outlet of the rear air supply pipe 3 faces the coal conveying direction.
The utility model discloses a scene concrete implementation function step as follows:
step (I): air heating, wherein high-temperature flue gas generated by combustion of a boiler 11 is conveyed to a heat exchanger 1 through a front flue gas pipe 4, fresh air is conveyed to the heat exchanger 1 through a front air supply pipe 2 by a fan 6, heat of the high-temperature flue gas is transferred to low-temperature air through the heat exchanger 1, the temperature of the low-temperature air is raised, and the air is heated;
step (II): coal is preheated, after the heat exchanger 1 heats air, the flue gas is discharged through a rear flue gas pipe 5, the air is transmitted to a coal conveying channel 8 through a rear air supply pipe 3, and heat is transferred to the coal through convection in the process of conveying the coal to a boiler 11, so that the coal is preheated;
step (three): preheating regulation and control, monitoring the temperature in the coal conveying channel 8 through readings of a first temperature measuring meter 9 and a second temperature measuring meter 10, controlling the temperature within a safety range of 110-140 ℃, adjusting and increasing the air volume through a fan 6 and a flow valve 7 when the temperatures displayed by the first temperature measuring meter 9 and the second temperature measuring meter 10 are higher than each other, so that the temperature in the coal conveying channel 8 is reduced within the safety range, and adjusting and reducing the air volume through the fan 6 and the flow valve 7 when the temperatures displayed by the first temperature measuring meter 9 and the second temperature measuring meter 10 are lower than each other, so that the temperature in the coal conveying channel 8 is increased within the safety range.
Claims (3)
1. A boiler combustion preheating device is characterized in that: the method comprises the following steps: the device comprises a heat exchanger, a front air supply pipe, a rear air supply pipe, a front flue gas pipe, a rear flue gas pipe, a fan, a flow valve, a coal conveying channel, 2 temperature measuring meters and a boiler, wherein the heat exchanger is a main heat exchange preheating part of the device and is respectively connected with the front flue gas pipe, the rear flue gas pipe, the front air supply pipe and the rear air supply pipe; two ends of the front air supply pipe are respectively connected with the air supply fan and the heat exchanger, and the front air supply pipe is provided with a flow valve; the rear air supply pipe is respectively connected with the heat exchanger and the coal conveying channel, and a temperature measuring meter is arranged on the rear air supply pipe; two ends of the front flue gas pipe are respectively connected with the boiler and the heat exchanger; one end of the rear flue gas pipe is connected with the heat exchanger, and the other end of the rear flue gas pipe is an exhaust end; the air supply fan is connected with the front air supply pipe and is a variable frequency fan; the flow valve is installed on the front air supply pipe; the coal conveying channel is a coal supply device of the boiler, the coal conveying channel is connected with the boiler, meanwhile, a temperature measuring meter is also arranged on the coal conveying channel, and the top of the front end of the coal conveying channel is connected with a rear air supply pipe; the two temperature measuring meters are respectively arranged on the rear air supply pipe and the coal conveying channel, and the specific installation positions are respectively that one temperature measuring meter is arranged on the rear air supply pipe close to the coal conveying channel, and the other temperature measuring meter is arranged on the top of the coal conveying channel and close to the boiler; the boiler is respectively connected with the front flue gas pipe and the coal conveying channel.
2. The boiler combustion preheating device according to claim 1, characterized in that: the coal conveying channel comprises a heat insulation shell and a conveying device, the heat insulation shell is an outer layer of the coal conveying channel, and the conveying device is arranged in the heat insulation shell.
3. The boiler combustion preheating device according to claim 1, characterized in that: and the rear air supply pipe penetrates through the heat-insulating shell of the coal conveying channel and is inserted into the coal conveying channel, and the outlet of the rear air supply pipe faces the coal conveying direction in the coal conveying channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921838372.6U CN210861061U (en) | 2019-10-30 | 2019-10-30 | Boiler combustion preheating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921838372.6U CN210861061U (en) | 2019-10-30 | 2019-10-30 | Boiler combustion preheating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210861061U true CN210861061U (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921838372.6U Active CN210861061U (en) | 2019-10-30 | 2019-10-30 | Boiler combustion preheating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210861061U (en) |
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2019
- 2019-10-30 CN CN201921838372.6U patent/CN210861061U/en active Active
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