CN209909917U - Reverse blowing system of grate furnace - Google Patents
Reverse blowing system of grate furnace Download PDFInfo
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- CN209909917U CN209909917U CN201920444120.9U CN201920444120U CN209909917U CN 209909917 U CN209909917 U CN 209909917U CN 201920444120 U CN201920444120 U CN 201920444120U CN 209909917 U CN209909917 U CN 209909917U
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- grate furnace
- temperature measuring
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- grate
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Abstract
The utility model provides a grate furnace blowback system includes: each back-blowing device is provided with a first valve; and the controller is used for controlling the opening quantity of the first valves according to the operation condition of the grate furnace, opening the corresponding back-blowing device and performing back-blowing on the fuel in the grate furnace. The back flushing can be rapidly carried out on the fuel which is burnt out according to the actual operation condition of the grate furnace, so that the fuel is further combusted, and the efficient operation of the grate furnace is ensured.
Description
Technical Field
The utility model belongs to the field of incineration equipment, especially, relate to a grate furnace blowback system.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Grate furnaces, i.e. grate-type incinerators, are versatile in form, account for more than 80% of the total incineration market worldwide, and are also of great importance in the boiler market. The furnace type has the biggest advantages of mature technology, stable and reliable operation and wide adaptability, and most of solid combustible materials can be directly fed into the furnace for combustion without any pretreatment. The method is particularly applied to large-scale combustible centralized treatment, and can lead the combustible to be burnt to generate electricity (or supply heat).
The inventor finds that due to the limitation of the structure of the grate furnace, the feeding is not uniform, the air distribution is not uniform or the rotating speed of the grate segment is higher, which causes higher mechanical incomplete combustion heat loss and ash physical heat loss. Too slow a reaction rate to actual conditions or improper operation can cause a large amount of ash and unburned fuel to fall directly into the hopper. Therefore, the requirement of the efficient operation of the grate furnace on operators is very strict, and the operators of most of the existing power plants are difficult to meet the requirement.
SUMMERY OF THE UTILITY MODEL
According to one aspect of one or more embodiments of the present disclosure, a back-blowing system for a grate furnace is provided, which can rapidly back-blow unburnt fuel according to the actual operation condition of the grate furnace, so that the fuel is further combusted, and the efficient operation of the grate furnace is ensured.
The utility model discloses a grate furnace blowback system, includes:
each back-blowing device is provided with a first valve;
and the controller is used for controlling the opening quantity of the first valves according to the operation condition of the grate furnace, starting the corresponding back flushing device and back flushing unburnt fuel in the grate furnace.
In one or more embodiments, the grate furnace blowback system further comprises a plurality of temperature measuring devices, and the temperature measuring devices are arranged along the width direction of the boiler; each temperature measuring device corresponds to a back flushing device; the temperature measuring device is used for detecting a temperature signal of the current position and transmitting the temperature signal to the controller, and the controller is used for comparing the received temperature signal with a preset temperature threshold value to obtain the current operation condition of the grate furnace.
In one or more embodiments, the number of temperature measurement devices is equal to the number of stokehole feeds.
In one or more embodiments, the blow back device is connected to a compressed air tank.
In one or more embodiments, the temperature measurement device is an infrared thermometry sensor.
In one or more embodiments, the blowing device is further communicated with a fire grate flue gas pipeline, and the other end of the fire grate flue gas pipeline is communicated with a fire grate flue gas outlet.
In one or more embodiments, a second valve is arranged on the flue gas pipeline of the grate furnace, the second valve is connected with a controller, and the controller is used for controlling the distribution ratio of the flue gas of the grate furnace and the air inflow according to a preset corresponding proportion.
In one or more embodiments, the controller is further connected to a background server, and the background server is connected to the monitoring terminal.
The beneficial effects of this disclosure are:
(1) the utility model discloses a grate furnace blowback system utilizes the controller to receive temperature signal and predetermines the temperature threshold value and compares, and when temperature signal reached predetermineeing the temperature threshold value, the corresponding blowback device of control first valve opened for corresponding blowback device carries out the blowback to the fuel in the grate furnace, can reach like this according to the actual operation operating mode of grate furnace, carries out the blowback to the fuel that does not burn completely rapidly, makes the fuel further burning, guarantees the high-efficient operation of grate furnace.
(2) The back-blowing system of the grate furnace disclosed by the invention has practical significance for improving the thermal efficiency of the boiler, can reduce the content of slag combustible materials from 20% to 5%, can reduce the temperature of slag from 650 ℃ to 450 ℃, and can improve the thermal efficiency of the boiler by 3% -5%.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a schematic structural diagram of a back-blowing system of a grate furnace provided in an embodiment of the present disclosure.
Fig. 2 is a schematic connection diagram of a blowback device provided in the embodiment of the disclosure.
Wherein, 1, a compressed air tank; 2, a temperature measuring device; 3, a first valve; 4, a controller; and 5, a back blowing device.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Fig. 1 is a schematic structural diagram of a back-blowing system of a grate furnace according to an embodiment of the present disclosure.
The embodiment is arranged on the proper position of the rear arch of the grate furnace, and carries out back flushing on the unburned fuel in the burnout area of the grate furnace, so that the fuel is further combusted, and the high-efficiency operation of the grate furnace is ensured.
As shown in fig. 1, the back-blowing system of the grate furnace of the present embodiment includes:
a plurality of back flushing devices 5, wherein each back flushing device 5 is provided with a first valve 3;
and the controller 4 is used for controlling the opening quantity of the first valves according to the operation condition of the grate furnace, opening the corresponding back-blowing device and performing back-blowing on the fuel in the grate furnace.
In another embodiment, the grate furnace blowback system further includes:
a plurality of temperature measuring devices 2, wherein the temperature measuring devices 2 are arranged along the width direction of the boiler; each temperature measuring device 2 corresponds to a back-blowing device 5; the temperature measuring device 2 is used for detecting a temperature signal of a current position and transmitting the temperature signal to the controller 4, and the controller 4 is used for comparing the received temperature signal with a preset temperature threshold value to obtain a current operation condition of the grate furnace.
In particular, the blow-back device 5 is connected to the compressed air tank 1, as shown in fig. 2.
In a specific implementation, the temperature measuring device is an infrared temperature measuring sensor.
An infrared temperature measuring sensor is a device that measures temperature using infrared rays.
Infrared temperature sensors can be divided into two categories according to the measurement principle: photoelectric infrared temperature sensor and thermoelectric infrared temperature sensor.
It should be noted that the temperature measuring device may also be implemented by using other existing temperature measuring structures.
In a specific implementation, the temperature measuring devices are arranged at equal intervals in the width direction of the boiler.
Therefore, the temperature distribution condition of the boiler in the combustion process can be accurately detected, and a matched temperature threshold value is set for starting the back flushing device.
Specifically, the number of temperature measuring devices is equal to the number of stokehole feeds.
For example: when the number of stokehole feeds is three, three temperature measuring devices are uniformly arranged in the width direction of the boiler.
Specifically, the temperature measuring device is mounted in a position aligned with the centerline of the stokehole feed.
The temperature measuring device measures a maximum temperature of 800 ℃. When the temperature reaches a certain temperature threshold, the first valve is opened, wherein the temperature threshold is related to the size of the boiler and the type of fuel, such as: the temperature threshold was set at 500 ℃.
In a specific implementation, the back-blowing device comprises a back-blowing nozzle and a back-blowing pipeline, and the first valve is arranged on the back-blowing pipeline.
It should be noted that the structure of the back-blowing device can also be realized by other existing back-blowing device structures, and the overall effect of the back-blowing system of the whole grate furnace is not affected.
The grate furnace blowback system of this embodiment utilizes the controller to receive temperature signal and predetermines the temperature threshold value and compare, and when temperature signal reached predetermineeing the temperature threshold value, the corresponding blowback device of control first valve was opened for corresponding blowback device carries out the blowback to the fuel in the grate furnace, can reach like this according to the actual operating condition of grate furnace, carries out the blowback to the fuel that does not burn completely rapidly, makes the further burning of fuel, guarantees the high-efficient operation of grate furnace.
The back-blowing system of the grate furnace has practical significance for improving the thermal efficiency of the boiler, can reduce the content of slag combustible substances from 20% to 5%, can reduce the temperature of slag from 650 ℃ to 450 ℃, and can improve the thermal efficiency of the boiler by 3% -5%.
In another embodiment, the controller is further connected with a background server, and the background server is connected with the monitoring terminal.
In particular, the monitoring terminal may be a PC or a mobile terminal.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (8)
1. A grate furnace blowback system, characterized by, includes:
each back-blowing device is provided with a first valve;
and the controller is used for controlling the opening quantity of the first valves according to the operation condition of the grate furnace, starting the corresponding back flushing device and carrying out back flushing on the unburnt fuel in the grate furnace.
2. The system of claim 1, wherein the system is installed at a predetermined position of a rear arch of the grate furnace to blow back unburnt fuel in a burnout zone of the grate furnace.
3. The system of claim 1, further comprising a plurality of temperature measuring devices, wherein the temperature measuring devices are arranged along the width direction of the boiler; each temperature measuring device corresponds to a back flushing device; the temperature measuring device is used for detecting a temperature signal of the current position and transmitting the temperature signal to the controller, and the controller is used for comparing the received temperature signal with a preset temperature threshold value to obtain the current operation condition of the grate furnace.
4. The system of claim 3, wherein the temperature measuring devices are equally spaced across the width of the boiler.
5. The system of claim 3, wherein the number of temperature measuring devices is equal to the number of stokehole charges.
6. The system of claim 1, wherein the blow-back means is connected to a compressed air tank.
7. The system of claim 3, wherein the temperature measuring device is an infrared temperature sensor.
8. The fire grate blowback system of claim 1, wherein the controller is further coupled to a background server, the background server being coupled to the monitor terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920444120.9U CN209909917U (en) | 2019-04-02 | 2019-04-02 | Reverse blowing system of grate furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920444120.9U CN209909917U (en) | 2019-04-02 | 2019-04-02 | Reverse blowing system of grate furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209909917U true CN209909917U (en) | 2020-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920444120.9U Expired - Fee Related CN209909917U (en) | 2019-04-02 | 2019-04-02 | Reverse blowing system of grate furnace |
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| Country | Link |
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| CN (1) | CN209909917U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882850A (en) * | 2019-04-02 | 2019-06-14 | 山东琦泉能源科技有限公司 | A kind of grate furnace blowback system and its working method |
-
2019
- 2019-04-02 CN CN201920444120.9U patent/CN209909917U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882850A (en) * | 2019-04-02 | 2019-06-14 | 山东琦泉能源科技有限公司 | A kind of grate furnace blowback system and its working method |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200107 Termination date: 20210402 |