阅读说明：本技术 给煤机自动断煤处理装置 (Automatic coal-breaking processing device for coal feeder ) 是由 李春雷 刘国友 赵洪峰 焦仁杰 李永伟 程磊 胡火魁 崔金富 周瑞志 刘晴漪 孔 于 2021-06-01 设计创作，主要内容包括：本发明涉及给煤机自动断煤处理装置,当给煤机发生断煤时,系统能第一时间进行事故处理,保证在最佳处理时间处理完毕,确保机组安全温定运行,同时增加该系统以后,降低值班员监盘压力,减少值班员手动操作量,精简监盘人员,对于高效率进行运行工作大有裨益,通过在艾默生协调系统内加入给煤机断煤自动处理逻辑块实现给煤机断煤自动处理,同时在对应给煤机画面内增加给煤机断煤自动处理投入、退出方式,在正常运行状态选择给煤机断煤自动处理投入,在启停机等异常情况下选择退出方式,切除给煤机断煤自动处理逻辑,提高系统运行方式灵活性；本发明具有减少值班员手动操作量、降低值班员监盘压力、高效率维护机组稳定运行的优点。(The invention relates to an automatic coal-break processing device of a coal feeder, when the coal feeder breaks, a system can process accidents at the first time, the processing is finished at the best processing time, the safe and constant temperature operation of a unit is ensured, meanwhile, after the system is added, the monitoring disc pressure of a duty worker is reduced, the manual operation amount of the duty worker is reduced, the monitoring disc personnel are simplified, the operation work with high efficiency is greatly facilitated, the automatic coal-break processing of the coal feeder is realized by adding a coal-break automatic processing logic block of the coal feeder into an Emerson coordination system, meanwhile, the automatic coal-break processing input and exit modes of the coal feeder are added in a corresponding coal feeder picture, the automatic coal-break processing input of the coal feeder is selected in a normal operation state, the exit mode is selected under abnormal conditions such as starting and stopping, the automatic coal-break processing logic of the coal feeder is cut off, and the flexibility of the system operation mode is improved; the invention has the advantages of reducing the manual operation amount of the operator on duty, reducing the disc monitoring pressure of the operator on duty and maintaining the stable operation of the unit with high efficiency.)

1. Automatic disconnected coal processing apparatus of feeder, its characterized in that: it comprises the following steps:

step 1): and (3) condition judgment: when the difference between the coal feeding quantity instruction input of the coal feeder and the feedback input of the coal feeder is 10t/h, namely the deviation module judges that the coal feeding quantity instruction is 10t/h and above greater than the feedback, and the quality of the coal feeding quantity instruction input and the feedback input measuring point of the coal feeder is not bad, when the coal feeding quantity instruction input and the feedback input measuring point of the coal feeder meet the conditions at the same time, the time is delayed for 1s through a delay block, and then the coal is logically judged to be broken for the coal feeder after passing through an SR trigger, and then the coal is judged to be a coal breaking signal yes; if the condition is not met, judging that no coal break signal no exists;

step 2): when a coal breaking signal is sent, namely the condition is judged to be yes, the coal feeding quantity instruction of the coal feeder is automatically adjusted to be the minimum coal quantity instruction of 10t/h, and the actual speed after adjustment is 10 t/s; if the condition is judged to be no, the logic signal realizes the normal regulation of the coal quantity feedback and the coal quantity instruction through the PID controller, and gives a coal breakage-free signal;

step 3): when a coal cutting signal is sent, namely the condition is judged to be yes, the hot air adjusting door of the coal feeder is switched to be in a manual state, the hot air adjusting door of the coal feeder is gradually closed, zero opening is realized, and the closing speed is 30% opening/s; when the outlet temperature of the coal feeder corresponding to the coal mill is higher than 90 ℃, measuring point 2/3, namely closing the hot air shutoff damper; if the condition is judged to be no, the air volume instruction normally runs, and the hot air shutoff baffle door and the hot air adjusting door are both in a normally open state;

step 4): when a coal cutting signal is sent, namely the condition is judged to be yes, the cold air adjusting door of the coal feeder is switched to a manual state, and the cold air adjusting door is gradually opened to realize full opening; if the condition is judged to be no, the operation is normal;

step 5): when a coal breaking signal is sent out, the bias of the loading force of the coal feeder corresponding to the coal mill is automatically adjusted to be-1.2 Mpa;

step 6): when a coal breakage signal is sent out, the unloading force bias of the coal feeder corresponding to the coal mill is automatically adjusted to be 1.2 Mpa;

step 7): when a coal breakage signal is sent out and the vibration value of the coal mill corresponding to the coal feeder is more than or equal to 3.5, automatically lifting the grinding roller; if the condition is judged to be no, normally lowering the grinding roller;

step 8): when the coal feeding amount of the coal feeder is fed back and stabilized at 10t/h, delaying for 3s, automatically lowering the grinding roller, lowering the grinding roller in place, automatically adjusting the bias of the loading force of the coal feeder to be-0.7 Mpa, and the bias of the unloading force of the coal feeder to be 0.7 Mpa;

step 9): after the coal breakage signal disappears and the temperature of the outlet of the upper coal mill is lower than 78 ℃, opening a hot air baffle door of the coal mill, and gradually opening a hot air adjusting door after the hot air baffle door is fully opened;

step 10): after the coal-cut signal disappears, the cold air adjusting door is closed to 30 percent and then put into an automatic state, and the temperature is set to 80 ℃;

step 11): and the coal feeding amount instruction of the coal feeder is automatically added to 20t/h, the increasing speed of the coal feeding amount instruction is 1t/5s, and then the coal feeder is put into an automatic state.

2. The automatic coal breakage processing device of the coal feeder as claimed in claim 1, wherein: and 2) when the coal signal is interrupted, judging the condition and simultaneously giving out a signal, and reducing the air inlet amount of the hearth through an air amount instruction.

3. The automatic coal breakage processing device of the coal feeder as claimed in claim 1, wherein: in the step 4), the opening speed of the cold air adjusting door of the coal feeder is 40% opening/s, the outlet temperature of the coal mill reaches 70 ℃ or below, and the opening is kept unchanged.

4. The automatic coal breakage processing device of the coal feeder as claimed in claim 1, wherein: and in the step 3), when the coal breaking signal disappears, the hot air shutoff baffle door is automatically opened.

5. The automatic coal breakage processing device of the coal feeder as claimed in claim 1, wherein: and 9) the opening speed of the hot air adjusting door in the step 9) is 10% opening/s, the opening is kept unchanged after the primary air flow at the inlet is 42t/h, and the hot air adjusting door is put into an automatic state.

Technical Field

The invention relates to the technical field of coal breakage processing of thermal power generating units, in particular to an automatic coal breakage processing device of a coal feeder.

Background

The thermal power generating set utilizes coal as energy to generate power, power generation enterprises are provided with a fuel coal supply system and a fuel coal supply system, most of coal burnt by the thermal power generating set has higher calorific value, coal quality is good, coal price is high, power generation cost is correspondingly higher, power generation cost of the traditional Chinese clean energy power generation is gradually increased, power generation cost is low and pollution is avoided, thermal power generation space is seriously compressed, annual utilization hours of the thermal power generating set are reduced year by year, profit capacity of the thermal power generation industry is remarkably reduced due to superposition of various factors, and part of power generation enterprises are in a successive loss state. The inferior coal is wet, and is easy to harden in the raw coal bin before entering a belt of the coal feeder, so that frequent coal breakage of the coal feeder is caused, partial fuel is lost in a boiler hearth, so that severe accidents such as unstable combustion or fire extinguishment are caused, the pressure of a monitoring disc of an operator on duty is huge, more personnel are required to participate in accident handling, and the personnel for monitoring the disc of a unit are increased; therefore, it is very necessary to provide an automatic coal-cutting processing device of a coal feeder, which reduces the manual operation amount of a duty worker, reduces the monitoring pressure of the duty worker and efficiently maintains the stable operation of a unit.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an automatic coal-break processing device of a coal feeder, which reduces the manual operation amount of an operator on duty, reduces the monitoring pressure of the operator on duty and efficiently maintains the stable operation of a unit.

The purpose of the invention is realized as follows: the automatic coal-cutting processing device of the coal feeder comprises the following steps:

step 1): and (3) condition judgment: when the difference between the coal feeding quantity instruction input of the coal feeder and the feedback input of the coal feeder is 10t/h, namely the deviation module judges that the coal feeding quantity instruction is 10t/h and above greater than the feedback, and the quality of the coal feeding quantity instruction input and the feedback input measuring point of the coal feeder is not bad, when the coal feeding quantity instruction input and the feedback input measuring point of the coal feeder meet the conditions at the same time, the time is delayed for 1s through a delay block, and then the coal is logically judged to be broken for the coal feeder after passing through an SR trigger, and then the coal is judged to be a coal breaking signal yes; if the condition is not met, judging that no coal break signal no exists;

step 2): when a coal breaking signal is sent, namely the condition is judged to be yes, the coal feeding quantity instruction of the coal feeder is automatically adjusted to be the minimum coal quantity instruction of 10t/h, and the actual speed after adjustment is 10 t/s; if the condition is judged to be no, the logic signal realizes the normal regulation of the coal quantity feedback and the coal quantity instruction through the PID controller, and gives a coal breakage-free signal;

step 3): when a coal cutting signal is sent, namely the condition is judged to be yes, the hot air adjusting door of the coal feeder is switched to be in a manual state, the hot air adjusting door of the coal feeder is gradually closed, zero opening is realized, and the closing speed is 30% opening/s; when the outlet temperature of the coal feeder corresponding to the coal mill is higher than 90 ℃, measuring point 2/3, namely closing the hot air shutoff damper; if the condition is judged to be no, the air volume instruction normally runs, and the hot air shutoff baffle door and the hot air adjusting door are both in a normally open state;

step 4): when a coal cutting signal is sent, namely the condition is judged to be yes, the cold air adjusting door of the coal feeder is switched to a manual state, and the cold air adjusting door is gradually opened to realize full opening; if the condition is judged to be no, the operation is normal;

step 5): when a coal breaking signal is sent out, the bias of the loading force of the coal feeder corresponding to the coal mill is automatically adjusted to be-1.2 Mpa;

step 6): when a coal breakage signal is sent out, the unloading force bias of the coal feeder corresponding to the coal mill is automatically adjusted to be 1.2 Mpa;

step 7): when a coal breakage signal is sent out and the vibration value of the coal mill corresponding to the coal feeder is more than or equal to 3.5, automatically lifting the grinding roller; if the condition is judged to be no, normally lowering the grinding roller;

step 8): when the coal feeding amount of the coal feeder is fed back by 10t/h and the time is delayed by 3s, automatically lowering the grinding roller, lowering the grinding roller in place, automatically adjusting the bias of the loading force of the coal feeder to be-0.7 Mpa and the bias of the unloading force of the coal feeder to be 0.7 Mpa;

step 9): after the coal breakage signal disappears and the temperature of the outlet of the upper coal mill is lower than 78 ℃, opening a hot air baffle door of the coal mill, and gradually opening a hot air adjusting door after the hot air baffle door is fully opened;

step 10): after the coal-cut signal disappears, the cold air adjusting door is closed to 30 percent and then put into an automatic state, and the temperature is set to 80 ℃;

step 11): and the coal feeding amount instruction of the coal feeder is automatically added to 20t/h, the increasing speed of the coal feeding amount instruction is 1t/5s, and then the coal feeder is put into an automatic state.

And 2) when the coal signal is interrupted, judging the condition and simultaneously giving out a signal, and reducing the air intake of the hearth through an air volume instruction.

In the step 4), the opening speed of the cold air adjusting door of the coal feeder is 40% opening/s, the outlet temperature of the coal mill reaches 70 ℃ or below, and the opening is kept unchanged.

And 3) when the coal breaking signal disappears, automatically opening the hot air shutoff damper.

And 9) the opening speed of the hot air adjusting door is 10% opening/s, the opening is kept unchanged after the primary air flow at the inlet is 42t/h, and the hot air adjusting door is put into an automatic state.

The invention has the beneficial effects that: the invention mainly aims at the problem that the coal is frequently broken when the low-grade coal is burnt in the thermal power plant at the present stage, and the operator needs to pay attention to the coal pulverizing system all the time, so that the accident treatment can be carried out at the first time of coal breakage, the safe and stable operation of the unit can be ensured, but the pressure of the monitoring disc of the operator on duty is large and the operator is easy to fatigue for a long time, meanwhile, the coal is easy to be found out in time delay and is mistakenly disconnected in accident treatment due to the unconsciousness in the night shift stage, the coal-supply machine coal-break automatic system of the invention has adverse effect on the stable operation of the machine set, after adopting the coal-supply machine coal-break automatic processing system, when the coal feeder is out of service, the system can process accidents in the first time, ensure that the processing is finished in the best processing time, ensure the safe and constant temperature operation of the unit, meanwhile, after the system is added, the pressure of a duty worker monitoring disc is reduced, the manual operation amount of the duty worker is reduced, disc monitoring personnel are simplified, and the system is beneficial to high-efficiency operation work. The coal-supply machine coal-break automatic processing logic block is added into the Emerson coordination system to realize the automatic processing of the coal-supply machine coal-break, meanwhile, the automatic processing input and exit modes of the coal-supply machine coal-break are added into the corresponding coal-supply machine picture, the automatic processing input of the coal-supply machine coal-break is selected in the normal operation state, the exit mode is selected under the abnormal conditions of starting and stopping and the like, the automatic processing logic of the coal-supply machine coal-break is cut off, the flexibility of the system operation mode is improved, and the invention is ensured to be flexibly applicable to the operation unit; the invention has the advantages of reducing the manual operation amount of the operator on duty, reducing the disc monitoring pressure of the operator on duty and efficiently maintaining the stable operation of the unit.

Drawings

FIG. 1 is a logic diagram of coal failure condition determination according to the present invention.

FIG. 2 is a schematic diagram of the coal feeder command logic after a coal outage in accordance with the present invention.

FIG. 3 is a logic diagram for hot air damper adjustment after a coal outage in accordance with the present invention.

FIG. 4 is a logic diagram of the hot air shut-off damper adjustment after coal shut-off according to the present invention.

FIG. 5 is a logic diagram of the cold air regulating gate adjustment after coal shut-off according to the present invention.

FIG. 6 is a logic diagram for setting the bias of the loading force of the coal pulverizer for a coal feeder after a coal outage in accordance with the present invention.

FIG. 7 is a logic diagram for setting the coal pulverizer unloading force offset for a coal feeder after a coal outage in accordance with the present invention.

FIG. 8 is a logic diagram for regulating the operation of a grinding roller of a coal pulverizer in accordance with the present invention after a coal break.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example 1

The automatic coal-cutting processing device of the coal feeder comprises the following steps:

step 1): and (3) condition judgment: as shown in fig. 1, when the difference between the coal feeding amount instruction input of the coal feeder and the feedback input of the coal feeder is 10t/h, namely, the deviation module judges that the coal feeding amount instruction is greater than the feedback by 10t/h or more, the quality of the coal feeding amount instruction input and the feedback input measuring point of the coal feeder is not bad, when the coal feeding amount instruction input and the feedback input measuring point of the coal feeder meet the conditions at the same time, the time is delayed for 1s through a delay block, and then the coal is logically judged to be coal-off of the coal feeder through an SR trigger, and then the coal-off signal yes is judged; if the condition is not met, judging that no coal break signal no exists;

step 2): as shown in fig. 2, when the coal cut-off signal is sent, that is, the condition is determined to be yes, the coal feeding amount instruction of the coal feeder is automatically adjusted to be the minimum coal amount instruction of 10t/h, and the actual speed after adjustment is 10 t/s; if the condition is judged to be no, the logic signal realizes the normal regulation of the coal quantity feedback and the coal quantity instruction through the PID controller, and gives a coal breakage-free signal;

step 3): as shown in fig. 3, when a coal cut-off signal is sent, that is, the condition is determined to be yes, the coal feeder hot air regulating door is switched to a manual state, the coal feeder hot air regulating door is gradually closed, zero opening is realized, and the closing speed is 30% opening/s; when the outlet temperature of the coal feeder corresponding to the coal mill is higher than 90 ℃, the hot air shutoff damper is closed at a measuring point 2/3, as shown in fig. 4; if the condition is judged to be no, the air volume instruction normally runs, and the hot air shutoff baffle door and the hot air adjusting door are both in a normally opened state, as shown in fig. 4;

step 4): as shown in fig. 5, when a coal cut-off signal is sent, namely the condition is judged to be yes, the cold air adjusting door of the coal feeder is switched to a manual state, and the cold air adjusting door is gradually opened to realize full opening; if the condition is judged to be no, the operation is normal;

step 5): as shown in FIG. 6, when the coal cut-off signal is sent, the bias of the loading force of the coal feeder corresponding to the coal pulverizer is automatically adjusted to-1.2 MPa;

step 6): as shown in fig. 7, when the coal cut-off signal is sent, the unloading force bias of the coal feeder corresponding to the coal mill is automatically adjusted to 1.2 Mpa;

step 7): as shown in fig. 8, when a coal cut-off signal is sent and the vibration value of the coal mill corresponding to the coal feeder is larger than or equal to 3.5, the grinding roller is automatically lifted; if the condition is judged to be no, normally lowering the grinding roller;

step 8): when the coal feeding amount of the coal feeder is fed back and stabilized at 10t/h, delaying for 3s, automatically lowering the grinding roller, lowering the grinding roller in place, automatically adjusting the bias of the loading force of the coal feeder to be-0.7 Mpa, and the bias of the unloading force of the coal feeder to be 0.7 Mpa;

step 9): after the coal breakage signal disappears and the temperature of the outlet of the upper coal mill is lower than 78 ℃, opening a hot air baffle door of the coal mill, and gradually opening a hot air adjusting door after the hot air baffle door is fully opened;

step 10): after the coal-cut signal disappears, the cold air adjusting door is closed to 30 percent and then put into an automatic state, and the temperature is set to 80 ℃;

step 11): and the coal feeding amount instruction of the coal feeder is automatically added to 20t/h, the increasing speed of the coal feeding amount instruction is 1t/5s, and then the coal feeder is put into an automatic state.

The invention mainly aims at the problem that the coal is frequently broken when the low-grade coal is burnt in the thermal power plant at the present stage, and the operator needs to pay attention to the coal pulverizing system all the time, so that the accident treatment can be carried out at the first time of coal breakage, the safe and stable operation of the unit can be ensured, but the pressure of the monitoring disc of the operator on duty is large and the operator is easy to fatigue for a long time, meanwhile, the coal is easy to be found out in time delay and is mistakenly disconnected in accident treatment due to the unconsciousness in the night shift stage, the coal-supply machine coal-break automatic system of the invention has adverse effect on the stable operation of the machine set, after adopting the coal-supply machine coal-break automatic processing system, when the coal feeder is out of service, the system can process accidents in the first time, ensure that the processing is finished in the best processing time, ensure the safe and constant temperature operation of the unit, meanwhile, after the system is added, the pressure of a duty worker monitoring disc is reduced, the manual operation amount of the duty worker is reduced, disc monitoring personnel are simplified, and the system is beneficial to high-efficiency operation work. The coal-supply machine coal-break automatic processing logic block is added into the Emerson coordination system to realize the automatic processing of the coal-supply machine coal-break, meanwhile, the automatic processing input and exit modes of the coal-supply machine coal-break are added into the corresponding coal-supply machine picture, the automatic processing input of the coal-supply machine coal-break is selected in the normal operation state, the exit mode is selected under the abnormal conditions of starting and stopping and the like, the automatic processing logic of the coal-supply machine coal-break is cut off, the flexibility of the system operation mode is improved, and the invention is ensured to be flexibly applicable to the operation unit; the invention has the advantages of reducing the manual operation amount of the operator on duty, reducing the disc monitoring pressure of the operator on duty and efficiently maintaining the stable operation of the unit.

Example 2

As shown in fig. 1-8, in the automatic coal-break processing device for the coal feeder, when the difference between the coal-feeding quantity instruction input of the coal feeder and the feedback input of the coal feeder is 10t/h, namely, the deviation module judges that the coal-feeding quantity instruction is greater than the feedback by 10t/h or more, and the quality of the coal-feeding quantity instruction input of the coal feeder and the quality of the feedback input measuring point are not bad, when the coal-feeding quantity instruction input and the feedback input measuring point meet the conditions at the same time, the time is delayed by 1s through a delay block, and then the coal-break signal yes is judged if the coal-breaking happens to the coal feeder after the logic judgment is made through an SR trigger; and if the condition is not met, judging that no coal break signal is generated.

When a coal breaking signal is sent, namely the condition is judged to be yes, the coal feeding quantity instruction of the coal feeder is automatically adjusted to be the minimum coal quantity instruction of 10t/h, and the actual speed after adjustment is 10 t/s; if the condition is judged to be no, the logic signal realizes the normal regulation of the coal quantity feedback and the coal quantity instruction through the PID controller, and a coal-break-free signal is given.

When a coal cutting signal is sent, namely the condition is judged to be yes, the hot air adjusting door of the coal feeder is switched to be in a manual state, the hot air adjusting door of the coal feeder is gradually closed, zero opening is realized, and the closing speed is 30% opening/s; when the outlet temperature of the coal feeder corresponding to the coal mill is higher than 90 ℃, measuring point 2/3, namely closing the hot air shutoff damper; and if the condition is judged to be no, the air quantity instruction normally runs, and the hot air shutoff baffle door and the hot air adjusting door are both in a normally opened state.

When a coal cutting signal is sent, namely the condition is judged to be yes, the cold air adjusting door of the coal feeder is switched to a manual state, and the cold air adjusting door is gradually opened to realize full opening; and if the condition is judged to be no, the operation is normally carried out.

When a coal breaking signal is sent out, the bias of the loading force of the coal feeder corresponding to the coal mill is automatically adjusted to be-1.2 Mpa.

When a coal breaking signal is sent out, the unloading force bias of the coal feeder corresponding to the coal mill is automatically adjusted to be 1.2 Mpa.

When a coal breakage signal is sent out and the vibration value of the coal mill corresponding to the coal feeder is more than or equal to 3.5, automatically lifting the grinding roller; and if the condition is judged to be no, normally lowering the grinding roller.

When the coal feeding amount of the coal feeder is fed back by 10t/h and the time is delayed by 3s, the grinding roller is automatically lowered, the grinding roller is lowered in place, the bias of the loading force of the coal feeder is automatically adjusted to be-0.7 Mpa, and the bias of the unloading force of the coal feeder is adjusted to be 0.7 Mpa.

After the coal breakage signal disappears and the temperature of the outlet of the upper coal mill is lower than 78 ℃, opening a hot air baffle door of the coal mill, and gradually opening a hot air adjusting door after the hot air baffle door is fully opened; after the coal-cut signal disappears, the cold air adjusting door is closed to 30 percent and then put into an automatic state, and the temperature is set to 80 ℃; and the coal feeding amount instruction of the coal feeder is automatically added to 20t/h, the increasing speed of the coal feeding amount instruction is 1t/5s, and then the coal feeder is put into an automatic state.

The invention mainly aims at the problem that the coal is frequently broken when the low-grade coal is burnt in the thermal power plant at the present stage, and the operator needs to pay attention to the coal pulverizing system all the time, so that the accident treatment can be carried out at the first time of coal breakage, the safe and stable operation of the unit can be ensured, but the pressure of the monitoring disc of the operator on duty is large and the operator is easy to fatigue for a long time, meanwhile, the coal is easy to be found out in time delay and is mistakenly disconnected in accident treatment due to the unconsciousness in the night shift stage, the coal-supply machine coal-break automatic system of the invention has adverse effect on the stable operation of the machine set, after adopting the coal-supply machine coal-break automatic processing system, when the coal feeder is out of service, the system can process accidents in the first time, ensure that the processing is finished in the best processing time, ensure the safe and constant temperature operation of the unit, meanwhile, after the system is added, the pressure of a duty worker monitoring disc is reduced, the manual operation amount of the duty worker is reduced, disc monitoring personnel are simplified, and the system is beneficial to high-efficiency operation work. The coal-supply machine coal-break automatic processing logic block is added into the Emerson coordination system to realize the automatic processing of the coal-supply machine coal-break, meanwhile, the automatic processing input and exit modes of the coal-supply machine coal-break are added into the corresponding coal-supply machine picture, the automatic processing input of the coal-supply machine coal-break is selected in the normal operation state, the exit mode is selected under the abnormal conditions of starting and stopping and the like, the automatic processing logic of the coal-supply machine coal-break is cut off, the flexibility of the system operation mode is improved, and the invention is ensured to be flexibly applicable to the operation unit.

The invention relates to automatic coal-break treatment of a coal feeder, which replaces the manual operation of operators when the traditional coal feeder breaks coal, improves the automatic operation degree of a unit.