CN211260853U - Online automatic broken bridge deashing system of exhaust-heat boiler flying dust collecting bucket - Google Patents
Online automatic broken bridge deashing system of exhaust-heat boiler flying dust collecting bucket Download PDFInfo
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- CN211260853U CN211260853U CN201922324822.6U CN201922324822U CN211260853U CN 211260853 U CN211260853 U CN 211260853U CN 201922324822 U CN201922324822 U CN 201922324822U CN 211260853 U CN211260853 U CN 211260853U
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Abstract
The utility model relates to an on-line automatic bridge-breaking ash-cleaning system of a fly ash collecting hopper of a waste heat boiler, which is characterized in that a first air cannon and a second air cannon are arranged at the front side of the bottom of the fly ash collecting hopper; the air cannon is connected with a manual ball valve; the bottom of the fly ash collecting hopper is provided with a temperature measuring element for monitoring the ash discharge temperature in real time; the air cannon is provided with an air cannon nozzle; the air cannon is connected with a pressure gauge and is provided with a pulse valve through a bolt; the air cannon is provided with an air cannon nozzle; the bottom of the fly ash collecting hopper is provided with a manual gate valve and an electric rotary discharger; the bottom of the fly ash collecting hopper is provided with two branches, wherein one branch is communicated with flue gas recirculation air; the other branch is communicated with primary air. The utility model discloses when the boiler operation, the lower grey condition of fighting is collected to the automatic judgement flying dust, carries out automatic broken bridge and handles, reduces operation personnel working strength to make and burn burning furnace steady operation, extension boiler operation cycle.
Description
Technical Field
The utility model belongs to the technical field of coal-fired power generation, domestic waste burns and specifically relates to burn broken bridge deashing system to domestic waste burns burning furnace.
Background
Along with the gradual improvement of the living standard, the improvement of a household garbage collecting and transporting system and the increasing of the quantity of household garbage, the garbage incineration power generation is comprehensively popularized nationwide in order to realize the reduction treatment of the household garbage. As the fly ash of a hearth, an evaporator, a superheater and an economizer forms high-temperature or low-temperature coking due to various reasons when the incinerator runs, and a fly ash coking block falls to the bottom of the fly ash collecting hopper, bridging is easily caused, ash discharging is not smooth, if the fly ash is not removed in time, the more the fly ash is gathered, the more the fly ash collecting hopper is full of ash, the normal combustion of the hearth and the normal heat exchange of the evaporator, the superheater and the economizer are influenced, and finally the boiler is forced to stop to clean ash. Therefore, the on-line bridge-breaking ash removal work of the fly ash collecting hopper of the incinerator becomes more and more important in the running process of the incinerator.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of above-mentioned prior art, provide an online automatic broken bridge deashing system of fill is collected to exhaust-heat boiler flying dust.
The utility model discloses a concrete technical scheme is:
an online automatic bridge-breaking ash removal system for a fly ash collecting hopper of a waste heat boiler is characterized in that a first air cannon 2 is arranged on the front side of the bottom of the fly ash collecting hopper 111, and the first air cannon 2 is connected with a first manual ball valve 1; a second air cannon 3 is arranged on the rear side of the bottom of the fly ash collecting hopper; the second air cannon 3 is connected with a second manual ball valve 4; the bottom of the fly ash collecting hopper 111 is provided with a temperature measuring element 5 for monitoring the ash discharge temperature in real time;
the first air cannon 2 is connected with a pressure gauge 221, and a pulse valve 23 is installed through a bolt 22; the first air cannon 2 is provided with a first air cannon nozzle 112;
correspondingly, the second air cannon 3 is connected with a pressure gauge and is provided with a pulse valve through a bolt; the second air cannon 3 is provided with a second air cannon nozzle;
the bottom of the fly ash collecting hopper 111 is provided with a manual gate valve 6 and an electric rotary discharger 7;
the bottom of the fly ash collecting hopper 111 is provided with two branches, wherein one branch is communicated with flue gas recirculation air, and the bottom of the fly ash collecting hopper 111 is sequentially connected with a first electromagnetic valve 8 and a third manual ball valve 9 through pipelines; the other branch is communicated with primary air, and the bottom of the fly ash collecting hopper 111 is sequentially connected with a second electromagnetic valve 10 and a fourth manual ball valve 11 through pipelines.
Vibrating the fly ash at the bottom of the fly ash collecting hopper at regular time when the boiler operates; the temperature of ash discharged from the fly ash collecting hopper is monitored on line in real time through a temperature measuring thermal resistor arranged at the bottom of the fly ash collecting hopper, and whether the fly ash collecting hopper bridges and blocks ash or not is judged in time; the first air cannon nozzle and the second air cannon nozzle heat the fly ash by fluidizing and heating hot air when the fly ash bridges and hardens, so that the flowability of the fly ash is increased; all the nozzles are horizontally and obliquely installed downwards, so that the dust deposition of the nozzles in operation is effectively prevented.
The branch fluidization adds hot air: one path is primary air (190-220 ℃), and the other path is flue gas recirculation air (190-220 ℃); preferentially using flue gas recirculation air according to the operation condition of the boiler, namely, the bottom of the fly ash collecting hopper 111 is sequentially connected with a first electromagnetic valve 8 and a third manual ball valve 9 through pipelines; when the ash is accumulated, the fluidized air electromagnetic valve is automatically opened, the accumulated ash temperature is heated through primary air, and the flowability of the fly ash is increased, namely the bottom of the fly ash collecting hopper 111 is sequentially connected with the second electromagnetic valve 10 and the fourth manual ball valve 11 through pipelines.
The beneficial effects of the utility model are that, when the boiler operation, the lower grey condition of fighting is collected to the automatic judgement flying dust, carries out the automatic broken bridge and handles, reduces operation personnel working strength to make and burn burning furnace steady operation, extension boiler operation cycle. Specifically, the method comprises the following steps:
1. automatically judging whether the fly ash collecting hopper bridges and blocks ash;
2. the fly ash bridge is cracked automatically, so that smooth ash discharge of the fly ash collecting hopper of the incinerator is ensured, and the long-term stable operation of the waste heat boiler is ensured;
3. the pollution of the flying ash leakage and flying dust caused by manual ash removal to the environment is avoided;
4. as the fly ash collecting hopper of the waste heat boiler is lined with the high-temperature refractory pouring material, the conventional electric vibrator vibrates the outer wall of the fly ash collecting hopper to cause the damage of the refractory pouring material, and the air cannon is additionally arranged, so that the damage to the refractory pouring material is avoided, and the purpose of bridge breaking is achieved;
5. because of the high-temperature refractory pouring material of the fly ash collecting bucket inner liner of the waste heat boiler, the heating effect of the conventional electric heater on the fly ash is slow, and the fly ash is heated by primary air or flue gas in circulating air, so that the liquidity of the fly ash is accelerated, and the high-temperature refractory pouring material has high speed and economic practicability.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic view of an on-line automatic bridge-breaking ash-removing system of a fly ash collecting hopper.
FIG. 2 is a layout view of air cannons in a fly ash collection hopper.
FIG. 3 is a schematic view of an air cannon configuration.
FIG. 4 is a logic control diagram of an on-line automatic bridge-breaking ash-cleaning system of a fly ash collecting hopper.
In fig. 1: 1. a first manual ball valve; 2. a first air cannon; 3. a second air cannon; 4-a second manual ball valve 5 and a temperature measuring element; 6. a manual gate valve; 7. an electric rotary discharger; 8. a first solenoid valve; 9. a third manual ball valve; 10-a second solenoid valve; 11-fourth manual ball valve.
In fig. 2: 111. a fly ash collecting hopper; 112. a first air cannon nozzle: 3 a second air cannon;
in fig. 3: 21. a pressure gauge assembly; 22. a bolt; 23. a pulse valve; 2. a first air cannon; 5. and an air outlet.
Detailed Description
As shown in fig. 1 and fig. 2, in an online automatic bridge-breaking ash removal system for a fly ash collecting hopper of a waste heat boiler, a first air cannon 2 is installed at the front side of the bottom of the fly ash collecting hopper 111, and the first air cannon 2 is connected with a first manual ball valve 1; a second air cannon 3 is arranged on the rear side of the bottom of the fly ash collecting hopper; the second air cannon 3 is connected with a second manual ball valve 4; the bottom of the fly ash collecting hopper 111 is provided with a temperature measuring element 5 for monitoring the ash discharge temperature in real time;
as shown in fig. 3, the first air cannon 2 is connected with a pressure gauge 221, and a pulse valve 23 is installed on the first air cannon through a bolt 22; the first air cannon 2 is provided with a first air cannon nozzle 112;
correspondingly, the second air cannon 3 is connected with a pressure gauge and is provided with a pulse valve through a bolt; the second air cannon 3 is provided with a second air cannon nozzle;
the bottom of the fly ash collecting hopper 111 is provided with a manual gate valve 6 and an electric rotary discharger 7;
the bottom of the fly ash collecting hopper 111 is provided with two branches, wherein one branch is communicated with flue gas recirculation air, and the bottom of the fly ash collecting hopper 111 is sequentially connected with a first electromagnetic valve 8 and a third manual ball valve 9 through pipelines; the other branch is communicated with primary air, and the bottom of the fly ash collecting hopper 111 is sequentially connected with a second electromagnetic valve 10 and a fourth manual ball valve 11 through pipelines.
Vibrating the fly ash at the bottom of the fly ash collecting hopper at regular time when the boiler operates; the temperature of ash discharged from the fly ash collecting hopper is monitored on line in real time through a temperature measuring thermal resistor arranged at the bottom of the fly ash collecting hopper, and whether the fly ash collecting hopper bridges and blocks ash or not is judged in time; the first air cannon nozzle and the second air cannon nozzle heat the fly ash by fluidizing and heating hot air when the fly ash bridges and hardens, so that the flowability of the fly ash is increased; all the nozzles are horizontally and obliquely installed downwards, so that the dust deposition of the nozzles in operation is effectively prevented.
The branch fluidization adds hot air: one path is primary air (190-220 ℃), and the other path is flue gas recirculation air (190-220 ℃); preferentially using flue gas recirculation air according to the operation condition of the boiler, namely, the bottom of the fly ash collecting hopper 111 is sequentially connected with a first electromagnetic valve 8 and a third manual ball valve 9 through pipelines; when the ash is accumulated, the fluidized air electromagnetic valve is automatically opened, the accumulated ash temperature is heated through primary air, and the flowability of the fly ash is increased, namely the bottom of the fly ash collecting hopper 111 is sequentially connected with the second electromagnetic valve 10 and the fourth manual ball valve 11 through pipelines.
The utility model discloses broken bridge deashing system of flying dust divide into manual mode and automatic mode, and when 7 moves of boiler normal operating and electronic gyration tripper, first manual ball valve 1, the manual ball valve 4 of second, the manual ball valve 9 of third, the manual ball valve 11 of fourth are opened entirely, and when automatic mode was thrown into, as shown in the logical schematic diagram of fig. 4:
1. an operator sets an upper limit value and a lower limit value of a normal temperature according to the temperature of the fly ash during normal operation, when the temperature measured by a temperature measuring element 5 at the bottom of a fly ash collecting hopper is higher than the lower limit temperature, a normal ash cleaning mode is entered (the time interval between rapping is tentatively set for 10 minutes and a cycle can be modified according to actual conditions), an outlet pulse valve of a first air cannon 2 is opened for rapping for 3 seconds, an outlet pulse valve of a second air cannon 3 is opened for rapping for 3 seconds after 5 seconds, a cycle is completed, and the next rapping period is carried out after the time reaches 10 minutes;
2. when the temperature measured by the temperature measuring element 5 at the bottom of the fly ash collecting hopper is lower than the lower limit of the normal temperature, the fly ash collecting hopper automatically enters a bridge-breaking ash-cleaning mode:
2.1, automatically opening a fluidizing air electromagnetic valve (namely a first flue gas recirculation air electromagnetic valve 8 or a second primary air electromagnetic valve 10, and automatically selecting a corresponding electromagnetic valve for automatic input before an operator puts in a system), continuously heating the fly ash by hot air at 190-220 ℃, increasing the flowability of the fly ash, and effectively preventing the fly ash from hardening to bridge;
2.2, the rapping frequency is accelerated, the rapping interval time is automatically shortened to 5 minutes (the time can be set according to the actual situation), the outlet pulse valve of the first air cannon 2 is opened for rapping, the outlet pulse valve of the second air cannon 3 is opened for rapping for 3 seconds after 5 seconds, a cycle is completed, and the next rapping period is carried out after the time reaches 5 minutes;
2.3 when the temperature measured by the temperature measuring element 5 at the bottom of the fly ash collecting hopper reaches the normal operating temperature, the valve is closed to fluidize the air electromagnetic valve, the bridge-breaking ash removal mode is exited, and the normal ash removal mode is automatically entered.
3. When the electric rotary discharger 7 is tripped, the manual mode is forcibly entered.
Specific examples are as follows: taking a certain project in Zhejiang as an example, the project is debugged, and the debugging result meets the design requirement that before the bridge-breaking ash removal system is additionally arranged, all fly ash collecting hoppers of the waste heat boiler do not regularly have the phenomenon of bridging and ash blocking, when the ash accumulation is serious, the boiler is stopped for ash removal, the secondary pollution of the fly ash on site caused by manual ash removal work is serious, the problem of bridge ash blocking of the fly ash collecting hopper frame is effectively solved through system transformation, and the operation period of the boiler is obviously prolonged.
Claims (2)
1. An online automatic bridge-breaking ash removal system of a fly ash collecting hopper of a waste heat boiler is characterized in that a first air cannon is mounted on the front side of the bottom of the fly ash collecting hopper and connected with a first manual ball valve; a second air cannon is arranged on the rear side of the bottom of the fly ash collecting hopper; the second air cannon is connected with a second manual ball valve; the bottom of the fly ash collecting hopper is provided with a temperature measuring element for monitoring the ash discharge temperature in real time;
the first air cannon is connected with a pressure gauge and is provided with a pulse valve through a bolt; the first air cannon is provided with a first air cannon nozzle;
the second air cannon is connected with a pressure gauge and is provided with a pulse valve through a bolt; the second air cannon is provided with a second air cannon nozzle;
the bottom of the fly ash collecting hopper is provided with a manual gate valve and an electric rotary discharger;
the bottom of the fly ash collecting hopper is provided with two branches, wherein one branch is communicated with flue gas recirculation air, and the bottom of the fly ash collecting hopper is sequentially connected with a first electromagnetic valve and a third manual ball valve through pipelines; the other branch is communicated with primary air, and the bottom of the fly ash collecting hopper is sequentially connected with a second electromagnetic valve and a fourth manual ball valve through pipelines.
2. The on-line automatic bridge-breaking ash removal system for the waste heat boiler fly ash collecting hopper according to claim 1, wherein the first air cannon nozzle and the second air cannon nozzle are horizontally and obliquely installed downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922324822.6U CN211260853U (en) | 2019-12-23 | 2019-12-23 | Online automatic broken bridge deashing system of exhaust-heat boiler flying dust collecting bucket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922324822.6U CN211260853U (en) | 2019-12-23 | 2019-12-23 | Online automatic broken bridge deashing system of exhaust-heat boiler flying dust collecting bucket |
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| CN211260853U true CN211260853U (en) | 2020-08-14 |
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| CN201922324822.6U Active CN211260853U (en) | 2019-12-23 | 2019-12-23 | Online automatic broken bridge deashing system of exhaust-heat boiler flying dust collecting bucket |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113819473A (en) * | 2021-09-18 | 2021-12-21 | 广东绿壳新能源有限公司 | Ash blockage preventing device for ash bucket under convection tube bundle of boiler |
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2019
- 2019-12-23 CN CN201922324822.6U patent/CN211260853U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113819473A (en) * | 2021-09-18 | 2021-12-21 | 广东绿壳新能源有限公司 | Ash blockage preventing device for ash bucket under convection tube bundle of boiler |
| CN113819473B (en) * | 2021-09-18 | 2024-01-26 | 广东绿壳新能源有限公司 | Anti-ash blocking device for ash hopper under convection tube bundle of boiler |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Long Jisheng Inventor after: Feng Chengxu Inventor after: Zhu Xiaoping Inventor after: Zhong Jiliang Inventor after: Zhang Huiyan Inventor after: Wang Gaoshang Inventor after: Wang Tao Inventor after: He Shudong Inventor after: Yang Wenyan Inventor after: Xie Jiangtao Inventor before: Long Jisheng Inventor before: Feng Chengxu Inventor before: Zhu Xiaoping Inventor before: Zhong Jiliang Inventor before: Zhang Huiyan Inventor before: Wang Gaoshang Inventor before: Wang Tao Inventor before: He Shudong Inventor before: Yang Wenyan Inventor before: Xie Jiangtao |
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| CB03 | Change of inventor or designer information |