CN213276361U - Monitoring system for high-alkali coal for liquid slag discharging boiler - Google Patents
Monitoring system for high-alkali coal for liquid slag discharging boiler Download PDFInfo
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- CN213276361U CN213276361U CN202022743538.5U CN202022743538U CN213276361U CN 213276361 U CN213276361 U CN 213276361U CN 202022743538 U CN202022743538 U CN 202022743538U CN 213276361 U CN213276361 U CN 213276361U
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Abstract
The utility model belongs to the technical field of coal-fired power generation, and discloses a monitoring system for burning high-alkali coal of a liquid slag discharge boiler, which comprises a receiving and displaying unit, a first alkali metal concentration detector and a plurality of second alkali metal concentration detectors; the first alkali metal concentration detector is arranged on a radiation chamber of the liquid slag discharging boiler, and the plurality of second alkali metal concentration detectors are arranged on the combustion chamber along the flame stroke; the first alkali metal concentration detector and the plurality of second alkali metal concentration detectors are connected with the receiving display unit; the receiving and displaying unit is used for receiving and displaying the alkali metal concentration signals detected by the first alkali metal concentration detector and the plurality of second alkali metal concentration detectors. The concentration and the change condition of the alkali metal in the liquid slag discharging boiler can be conveniently known in real time, the problem that the concentration of the alkali metal in the liquid slag discharging boiler can not be effectively monitored is solved, and the alkali metal release process in the process of burning the high-alkali coal by the liquid slag discharging boiler can be monitored.
Description
Technical Field
The utility model belongs to the technical field of coal-fired power generation, a monitored control system that is used for liquid sediment boiler to burn high-alkali coal is related to.
Background
The content of alkali metal in the high-alkali coal is up to more than 4 percent, and the direct combustion can cause serious problems of a large amount of coking in the boiler, contamination of equipment such as a heating surface, a tail flue and the like, and the like which are harmful to the operation safety of the boiler. The conventional pulverized coal solid slag-discharging boiler is difficult to realize the aim of burning high-alkali coal, the liquid slag-discharging boiler has the advantage of liquid slag discharge, and can realize the collection of a large amount of alkali metal in liquid slag in the boiler, so that the concentration of the alkali metal in flue gas is controlled within the safe operation range of relevant equipment of the boiler.
The combustion and monitoring system of the prior liquid slag discharging boiler mainly aims at the low-alkali coal type of the design of the liquid slag discharging boiler for combustion, and under the condition of burning high-alkali coal, an effective monitoring means is lacked, the concentration and the change condition of alkali metal in the liquid slag discharging boiler cannot be effectively monitored, so that an effective optimization control strategy is difficult to make, and further, the problems that the safe, continuous and stable operation of the boiler is influenced by slag bonding, severe contamination of a heating surface and the like caused by the overhigh escape rate of the alkali metal in the high-alkali coal under the condition of burning the high-alkali coal are difficult to avoid.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome among the above-mentioned prior art, the shortcoming of the unable effectual control liquid row's of sediment boiler interior high alkali coal alkali metal's the concentration condition provides a monitored control system that is used for liquid row's sediment boiler to burn high alkali coal.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a monitoring system for high-alkali coal used for liquid slag discharging boiler combustion comprises a receiving display unit, a first alkali metal concentration detector and a plurality of second alkali metal concentration detectors; the first alkali metal concentration detector is arranged on a radiation chamber of the liquid slag discharging boiler, and the plurality of second alkali metal concentration detectors are arranged on the combustion chamber along the flame stroke; the first alkali metal concentration detector and the plurality of second alkali metal concentration detectors are connected with the receiving display unit; the receiving and displaying unit is used for receiving and displaying the alkali metal concentration signals detected by the first alkali metal concentration detector and the plurality of second alkali metal concentration detectors.
The utility model discloses further improvement lies in:
the receiving and displaying unit is a DCS control system.
The liquid slag discharging boiler comprises a smoke and air combustion system, wherein the smoke and air combustion system comprises a hot air pipeline, a hot air box, a pulverized coal pipeline, a high-alkali coal burner, a burner hot air adjusting door, a grading air adjusting door and a depth grading air adjusting door; one end of the hot air pipeline is connected with the hot air box, the other end of the hot air pipeline is provided with a first branch, a second branch and a third branch, the high-alkali coal burner is connected with the combustion chamber and is provided with the first branch, the second branch is provided with a graded air nozzle connected with the combustion chamber, the third branch is provided with a deep graded air nozzle connected with the combustion chamber, and the coal dust pipeline is connected with the high-alkali coal burner; the high-alkali coal burner, the grading air nozzle and the deep grading air nozzle are arranged on the combustion chamber from top to bottom; the burner hot air adjusting door, the grading air adjusting door and the depth grading air adjusting door are respectively arranged on the first branch, the second branch and the third branch; and the number of the second alkali metal concentration detectors is three, and the second alkali metal concentration detectors are respectively positioned between the high-alkali coal burner and the grading air nozzle, between the grading air nozzle and the deep grading air nozzle and at the bottom of the combustion chamber.
The NOx concentration detector is arranged on the combustion chamber and is connected with the receiving and displaying unit; and the receiving and displaying unit is used for receiving and displaying the NOx concentration signal detected by the NOx concentration detector.
The first alkali metal concentration detector and the plurality of second alkali metal concentration detectors are respectively provided with an air cooling pipeline; all air cooling pipelines are connected with the air cooling fan.
And the air cooling pipeline is spirally wound on the first alkali metal concentration detector or the second alkali metal concentration detector.
The first alkali metal concentration detector and the plurality of second alkali metal concentration detectors are respectively provided with a water cooling pipeline; all the water cooling pipelines are connected with the water cooling pump.
And the water cooling pipeline is spirally wound on the first alkali metal concentration detector or the second alkali metal concentration detector.
The first alkali metal concentration detector and the plurality of second alkali metal concentration detectors are connected with the receiving display unit through hard wires.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a monitored control system for liquid sediment boiler burns and uses high alkali coal, through install alkali metal concentration detector additional in the region of liquid sediment boiler flame stroke, and receive the alkali metal concentration signal that first alkali metal concentration detector and a plurality of second alkali metal concentration detector detected and show through receiving the display element, be convenient for real-time and convenient learn alkali metal's in the liquid sediment boiler concentration and the situation of change in the liquid sediment boiler, solved the problem that can't effectual control alkali metal's in the liquid sediment boiler concentration, realize the monitoring to liquid sediment boiler burns and uses high alkali coal in-process alkali metal release process, through the dynamic monitoring to flue gas alkali metal concentration change process in the combustion process, and then can obtain the entrapment rate to alkali metal in the boiler liquid sediment through calculating, provide the basis for the control strategy of optimizing alkali metal entrapment control effect in the boiler combustion process, the problems that the traditional combustion optimization adjustment work of blended high-alkali coal is carried out passively by depending on the conditions of on-site high-alkali coal slagging and ash blocking, the large time delay, the serious delay of the adjustment work and the like are not beneficial to the safe and continuous combustion of the high-alkali coal are solved, the capture of alkali metal by the liquid slag boiler is improved under the condition that the blended high-alkali coal of the liquid slag boiler is ensured, the boiler is prevented from being blocked, and the heating surface is prevented from being seriously coked and contaminated, and the method has important significance for improving the performance index of the boiler under the condition of the high-alkali coal for combustion, which is safe, efficient and clean.
Furthermore, the NOx concentration detector is arranged, so that the NOx concentration in the combustion chamber can be accurately obtained.
Further, the device also comprises an air cooling fan or a water cooling pump, and the air cooling fan or the water cooling pump is used for carrying out air cooling or water cooling on the alkali metal concentration detector so that the alkali metal concentration detector can better work in the combustion chamber.
Drawings
FIG. 1 is a schematic view of the monitoring system for burning high-alkali coal used in a slag tapping boiler according to the present invention;
FIG. 2 is a logic diagram of the optimal control method for burning high-alkali coal in a slagging tap boiler according to the present invention.
Wherein: 1-a combustion chamber; 2-catching a slag screen; 3-a radiation chamber; 4-a hot air box; 5-pulverized coal pipeline; 6-high alkali coal burner; 7-alkali metal concentration detector in fire zone; 8-grading air nozzles; 9-a main combustion zone alkali metal concentration detector; 10-a deep grading air nozzle; 11-furnace bottom alkali metal concentration detector; 12-a radiation chamber alkali metal concentration detector; 13-a burner hot air regulating gate; 14-staged air regulating door; 15-a deep classification wind adjusting door; 16-DCS control system.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, in an embodiment of the present invention, a monitoring system for burning high alkali coal in a liquid slag discharging boiler is provided, which installs an alkali metal concentration detector through a key region in a flame travel direction, and introduces a corresponding signal into a receiving and displaying unit to display, thereby solving the concentration condition of alkali metal in the liquid slag discharging boiler, and realizing the monitoring of alkali metal release process in the process of burning high alkali coal in the liquid slag discharging boiler.
In this embodiment, a double U-shaped slagging boiler is taken as an example for illustration, but not limited thereto, most slagging boilers can be adopted, and the specific installation position and number of the alkali metal concentration detectors can be increased or decreased according to the structural characteristics of the boiler equipment.
Specifically, two U type slag tapping boilers include radiation chamber 3 and the boiler combustion chamber subassembly that radiation chamber 3 both sides symmetry set up, and boiler combustion chamber subassembly includes combustion chamber 1 and catches sediment screen 2, and combustion chamber 1 is connected with the entry of radiation chamber 3, catches sediment screen 2 and sets up between combustion chamber 1 and radiation chamber 3.
The monitoring system for the high-alkali coal for the liquid slag discharging boiler comprises a DCS control system 16, a monitoring system connected with a combustion chamber 1 of the liquid slag discharging boiler and a smoke and air combustion system.
In the present embodiment, two sets of monitoring systems are provided, based on two combustion chambers 1.
The monitoring system comprises a first alkali metal concentration detector and a plurality of second alkali metal concentration detectors, wherein the first alkali metal concentration detector is arranged on a radiation chamber 3 of the slag tapping boiler, and the plurality of second alkali metal concentration detectors are arranged on a combustion chamber 1 along the flame stroke; the first alkali metal concentration detector and the plurality of second alkali metal concentration detectors are connected with the receiving display unit.
Based on the double-U-shaped liquid slag discharging boiler, the design of a smoke-air combustion system of the double-U-shaped liquid slag discharging boiler is mainly divided into two parts, namely a primary air-powder part and a hot air part, wherein primary air-powder airflow enters an inlet of a high-alkali coal burner 6 through an outlet of a coal-powder pipeline 5 and then is sent into a combustion chamber 1 for combustion through an outlet of the high-alkali coal burner 6; the hot air part is divided into three branches, the first branch is connected with the inlet of a hot air adjusting door 13 of the burner, the outlet of the hot air adjusting door 13 of the burner is connected with the inlet of the high alkali coal burner 6, and the high alkali coal is sent into the combustion chamber 1 through the outlet of the high alkali coal burner 6; the second branch is connected with the inlet of the grading air adjusting door 14, the outlet of the grading air adjusting door 14 is connected with the inlet of the grading air nozzle 8, and the grading air is sent into the combustion chamber 1 through the outlet of the grading air nozzle 8; the third branch is connected with the inlet of the depth grading air adjusting door 15, the outlet of the depth grading air adjusting door 15 is connected with the inlet of the depth grading air nozzle 9, and the air is sent into the combustion chamber 1 through the outlet of the depth grading air nozzle 9.
The adjustable high-alkali coal burner 6, the classifying air nozzle 8 and the deep classifying air nozzle 10 for controlling low NOx combustion are arranged, so that slagging and contamination in the furnace can be inhibited under the condition that the high-alkali coal is combusted in the liquid slag discharging boiler, and the capture rate of the liquid slag of a combustion system to alkali metal is improved.
Based on a double-U-shaped liquid slag discharging boiler, four regions of the double-U-shaped liquid slag discharging boiler are provided with alkali metal concentration detectors, an alkali metal concentration monitoring system with a stroke along a flame stroke is obtained, based on the characteristics of the flame stroke of the double-U-shaped flame liquid slag discharging boiler, the first alkali metal concentration detector is a radiation chamber alkali metal concentration detector 12, the second alkali metal concentration detector is three, namely an ignition region alkali metal concentration detector 7, a main combustion region alkali metal concentration detector 9 and a furnace bottom alkali metal concentration detector 11, which are respectively positioned between a high alkali coal burner 6 and a grading air nozzle 8, between the grading air nozzle 8 and a deep grading air nozzle 10 and at the bottom of a combustion chamber 1. Wherein, the alkali metal concentration detector 7 in the ignition area mainly monitors the alkali metal concentration at the outlet of the high alkali coal burner 6; the main combustion zone alkali metal concentration detector 9 is mainly used for detecting the alkali metal concentration of an outlet area of the graded air nozzle 8; the furnace bottom alkali metal concentration detector 11 is mainly used for monitoring the concentration of alkali metal at the downstream of the deep classification air nozzle 10, namely at the upstream of the slag catching screen 2; the radiation chamber alkali metal concentration detector 12 is mainly used for capturing the alkali metal concentration of the area of the slag screen 2 outlet radiation chamber 3; the smoke metal concentration signals of the alkali metal concentration detector 7 in the fire area, the alkali metal concentration detector 9 in the main combustion area, the alkali metal concentration detector 11 in the furnace bottom and the alkali metal concentration detector 12 in the radiation chamber are transmitted to the receiving display unit through data lines.
The measurement principles of the alkali metal concentration detector 7 in the ignition area, the alkali metal concentration detector 9 in the main combustion area, the alkali metal concentration detector 11 in the furnace bottom and the alkali metal concentration detector 12 in the radiation chamber can adopt the principles and types of optics and the like for online monitoring the alkali metal concentration in the flue gas, such as: an alkali metal vapor atomic density measuring device in a glass alkali metal gas chamber disclosed in patent CN 111929199A.
The receiving and displaying unit is used for receiving and displaying the alkali metal concentration signals detected by the first alkali metal concentration detector and the plurality of second alkali metal concentration detectors.
Preferably, the receiving and displaying unit can adopt the DCS control system 16 that is currently set in the power plant, and has the functions of receiving and displaying data.
Specifically, real-time data obtained by monitoring by the alkali metal concentration detector 7 in the ignition area, the alkali metal concentration detector 9 in the main combustion area, the alkali metal concentration detector 11 at the furnace bottom and the alkali metal concentration detector 12 in the radiation chamber are comprehensively processed by the DCS control system 16, and then the alkali metal concentration and the change characteristics of the alkali metal concentration in the key area in the flame stroke direction are obtained in the DCS control system 16, so that the alkali metal concentration is monitored. Meanwhile, based on the monitoring signal, optimized adjustment strategy information for the adjustable high-alkali coal burner 6, the burner hot air adjusting door 13, the classifying air adjusting door 14 and the deep classifying air adjusting door 15 can be obtained, corresponding control signals are given for adjustment, the alkali metal trapping rate of a combustion system is improved, slag blockage of a hearth and serious contamination of a heating surface are prevented, and accordingly optimized control of high-alkali coal for combustion of the liquid slag removal boiler is achieved. When the optimization adjustment strategy information is made, the existing conventional combustion related parameters such as a combustion intensity signal, a temperature signal, an NOx concentration signal and the like obtained by a furnace combustion monitoring system can be combined, and related feedback parameters such as a furnace contamination soot blowing frequency, state feedback and a liquid slag continuous slag discharging state are combined, so that the result is more accurate.
To sum up, the monitoring system for burning high alkali coal of the liquid slag discharging boiler of the utility model, through installing the alkali metal concentration detector in the area of the flame stroke of the liquid slag discharging boiler, and receiving and displaying the alkali metal concentration signal detected by the first alkali metal concentration detector and the second alkali metal concentration detectors through the receiving and displaying unit, the concentration and the variation condition of the alkali metal in the liquid slag discharging boiler can be conveniently known in real time, the problem that the concentration condition of the alkali metal in the liquid slag discharging boiler can not be effectively monitored is solved, the monitoring of the alkali metal releasing process in the process of burning high alkali coal of the liquid slag discharging boiler is realized, the trapping rate of the alkali metal in the liquid slag discharging of the boiler can be analyzed through the dynamic monitoring of the smoke alkali metal concentration variation process in the burning process, the basis is provided for optimizing the control strategy of the alkali metal trapping control effect in the burning process of the boiler, the problems that the traditional combustion optimization adjustment work of blended high-alkali coal is carried out passively by depending on the conditions of on-site high-alkali coal slagging and ash blocking, the time delay is large, the regulation work lag is serious and the like, which are not beneficial to the safe and continuous combustion of the high-alkali coal are solved, under the condition that the blended high-alkali coal of the liquid slag boiler is ensured, the capture of alkali metal by the liquid slag boiler is promoted, the boiler is prevented from being blocked and seriously coked and contaminated on the heating surface, and the method has important significance for promoting the safe, efficient and clean utilization performance index of the boiler under the condition of the high-alkali coal for combustion.
Preferably, the monitoring system for the high-alkali coal for the slagging tap boiler further comprises an NOx concentration detector, wherein the NOx concentration detector is arranged on the combustion chamber 1 and is connected with the receiving and displaying unit; the receiving and displaying unit is used for receiving and displaying the NOx concentration signal detected by the NOx concentration detector, and monitoring the NOx generation amount in the process of burning the high-alkali coal.
Preferably, the monitoring system for the high-alkali coal for the liquid residue removal boiler further comprises an air cooling fan, wherein air cooling pipelines are arranged on the first alkali metal concentration detector and the second alkali metal concentration detectors; all air cooling pipelines are connected with the air cooling fan to carry out air cooling on the alkali metal concentration detector, so that the alkali metal concentration detector can work in the combustion chamber 1 better. Wherein, the air cooling pipeline can be arranged on the first alkali metal concentration detector or the second alkali metal concentration detector in a spiral winding mode.
Preferably, the monitoring system for the high-alkali coal for the liquid slag removal boiler further comprises a water cooling pump, wherein water cooling pipelines are arranged on the first alkali metal concentration detector and the second alkali metal concentration detectors; all water-cooling pipelines are connected with a water-cooling pump to carry out water-cooling on the alkali metal concentration detector, so that the alkali metal concentration detector can better work in the combustion chamber 1. The water cooling pipeline can be arranged on the first alkali metal concentration detector or the second alkali metal concentration detector in a spiral winding mode.
Preferably, the first alkali metal concentration detector and the plurality of second alkali metal concentration detectors are connected with the receiving display unit through hard wires, so that the connection is stable, and the accuracy of data transmission is ensured.
Referring to fig. 2, based on the utility model discloses monitored control system, can also realize being used for the optimization control of liquid row sediment boiler to burn high alkali coal, this optimization control's method includes following step, and wherein receive the display element and adopt DCS control system 16 to realize.
S1: the alkali metal concentration signals on the flame path in the combustion chamber 1 and in the radiation chamber 3 are obtained by the monitoring system and sent to the DCS control system 16. S2: and acquiring a combustion intensity signal, a temperature signal, an NOx concentration signal, a slag tapping signal and a contamination soot blowing signal in the combustion chamber 1 and sending the signals to a DCS (distributed control system) 16. S3: the DCS control system 16 generates control signals of the burner hot air adjusting door 13, the classifying air adjusting door 14, the deep classifying air adjusting door 15 and the high alkali coal burner 6 according to the alkali metal concentration signal and by combining a combustion intensity signal, a temperature signal, an NOx concentration signal, a slag tapping signal of liquid slag and a contamination soot blowing signal in the combustion chamber 1. S4: and controlling a hot air adjusting door 13, a grading air adjusting door 14, a depth grading air adjusting door 15 and the high-alkali coal burner 6 according to the control signals.
The optimized control method for the high-alkali coal used for the liquid slag boiler is characterized in that a monitoring system is used for acquiring alkali metal concentration signals in a flame stroke and a radiation chamber 3 in a combustion chamber 1 in real time and sending the signals to a DCS control system 16, meanwhile, a combustion intensity signal, a temperature signal, an NOx concentration signal, a liquid slag discharging signal and a contamination soot blowing signal which are monitored by the existing monitoring system in the combustion chamber 1 are acquired and sent to the DCS control system 16, and the signal processing function of the existing DCS control system 16 or the historical experience of technical personnel are utilized; the DCS control system 16 provides an active control strategy for optimizing and adjusting systems such as a high-alkali coal burner and a staged air for key equipment for controlling alkali metal combustion at the first time according to the monitoring signals, generates control signals of a burner hot air adjusting door 13, a staged air adjusting door 14, a deep staged air adjusting door 15 and the high-alkali coal burner 6, improves the capture rate of alkali metal, prevents furnace slag blockage and serious contamination of a heating surface, reduces the NOx generation amount of the high-alkali coal for the liquid slag-off boiler combustion, realizes the optimization and control of the high-alkali coal for the liquid slag-off boiler combustion, effectively solves the problems that the traditional high-alkali coal for combustion passively depends on the conditions of on-site high-alkali coal slag bonding and ash blockage to perform the combustion optimization and adjustment work of blended high-alkali coal, and has the problems of large delay, serious regulation and control work lag and the like which are not beneficial to the safe and continuous combustion of the high-alkali coal.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (9)
1. A monitoring system for high-alkali coal used for liquid slag-off boiler combustion is characterized by comprising a receiving and displaying unit, a first alkali metal concentration detector and a plurality of second alkali metal concentration detectors;
the first alkali metal concentration detector is arranged on a radiation chamber (3) of the slag tapping boiler, and the plurality of second alkali metal concentration detectors are arranged on the combustion chamber (1) along the flame stroke; the first alkali metal concentration detector and the plurality of second alkali metal concentration detectors are connected with the receiving display unit;
the receiving and displaying unit is used for receiving and displaying the alkali metal concentration signals detected by the first alkali metal concentration detector and the plurality of second alkali metal concentration detectors.
2. The monitoring system for high-alkali coal for slagging liquidized boiler combustion according to claim 1, wherein the receiving and displaying unit is a DCS control system (16).
3. The monitoring system for the high alkali coal fired by the slagging tap boiler according to claim 1, wherein the slagging tap boiler comprises a smoke and air combustion system, the smoke and air combustion system comprises a hot air pipeline, a hot air box (4), a pulverized coal pipeline (5), a high alkali coal burner (6), a burner hot air adjusting door (13), a grading air adjusting door (14) and a depth grading air adjusting door (15); one end of the hot air pipeline is connected with the hot air box (4), the other end of the hot air pipeline is provided with a first branch, a second branch and a third branch, the high-alkali coal burner (6) is connected with the combustion chamber (1) and is provided with the first branch, the second branch is provided with a grading air nozzle (8) connected with the combustion chamber (1), the third branch is provided with a deep grading air nozzle (10) connected with the combustion chamber (1), and the coal powder pipeline (5) is connected with the high-alkali coal burner (6); the high-alkali coal burner (6), the grading air nozzle (8) and the deep grading air nozzle (10) are arranged on the combustion chamber (1) from top to bottom; the burner hot air adjusting door (13), the grading air adjusting door (14) and the depth grading air adjusting door (15) are respectively arranged on the first branch, the second branch and the third branch; and the number of the second alkali metal concentration detectors is three, and the three second alkali metal concentration detectors are respectively positioned between the high-alkali coal burner (6) and the grading air nozzle (8), between the grading air nozzle (8) and the deep grading air nozzle (10) and at the bottom of the combustion chamber (1).
4. The monitoring system for the high-alkali coal fired by the slagging tap boiler according to claim 1, further comprising a NOx concentration detector disposed on the combustion chamber (1) and connected to the receiving and displaying unit; and the receiving and displaying unit is used for receiving and displaying the NOx concentration signal detected by the NOx concentration detector.
5. The monitoring system for the high-alkali coal fired by the slagging tap boiler according to claim 1, further comprising an air cooling fan, wherein the first alkali metal concentration detector and the plurality of second alkali metal concentration detectors are respectively provided with an air cooling pipeline; all air cooling pipelines are connected with the air cooling fan.
6. The monitoring system for high-alkali coal for slagging liquidized boiler according to claim 5, wherein the air-cooling pipeline is spirally wound around the first alkali metal concentration detector or the second alkali metal concentration detector.
7. The monitoring system for the high-alkali coal fired by the slagging tap boiler according to claim 1, further comprising a water cooling pump, wherein the first alkali metal concentration detector and the plurality of second alkali metal concentration detectors are respectively provided with a water cooling pipeline; all the water cooling pipelines are connected with the water cooling pump.
8. The monitoring system for high-alkali coal for slagging tap boiler according to claim 7, wherein the water-cooled pipeline is spirally wound on the first alkali metal concentration detector or the second alkali metal concentration detector.
9. The monitoring system for high-alkali coal for slagging tap boiler according to claim 1, wherein the first alkali metal concentration detector and the second alkali metal concentration detectors are connected with the receiving and displaying unit by hard wiring.
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