CN106843123A - The denitration automatic control system of heat accumulating gas boiler - Google Patents
The denitration automatic control system of heat accumulating gas boiler Download PDFInfo
- Publication number
- CN106843123A CN106843123A CN201611156535.3A CN201611156535A CN106843123A CN 106843123 A CN106843123 A CN 106843123A CN 201611156535 A CN201611156535 A CN 201611156535A CN 106843123 A CN106843123 A CN 106843123A
- Authority
- CN
- China
- Prior art keywords
- solution
- denitration
- pressure
- compressed air
- automatic control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1103—Special, intelligent I-O processor, also plc can only access via processor
Abstract
The invention discloses a kind of denitration automatic control system of heat accumulating gas boiler, heat accumulating gas boiler is provided with burner and denitration nozzle.Denitration automatic control system includes solution transport subsystem, compressed air transport subsystem and control subsystem, and solution transport subsystem includes Agitation Tank, NaOH solution tank NaOH, solution pressure storage tank, solution electromagnetic valve, solution transfer pump and solution pressure pump；Compressed air transport subsystem includes compressed air reservoir and compressed air electromagnetic valve；Control subsystem includes：Flue gas analyzer, temperature detection part, pressure detecting part, frequency converter and PLC system, frequency converter is connected to adjust the rotating speed of solution pressure pump by frequency conversion with solution pressure pump, PLC system is connected with frequency converter, PLC system controls the frequency of frequency converter after data analysis is carried out to the temperature value for receiving, pressure value and amount of nitrogen oxides value.Denitration automatic control system of the invention, the special construction for heat storage type combustion takes unique control, realizes automation denitration.
Description
Technical field
The present invention relates to the out of stock field of purification of flue gas, automatically controlled more particularly, to a kind of denitration of heat accumulating gas boiler
System.
Background technology
With the development of modern industrialization, air pollution also aggravates therewith, the waste gas of the burning generation of a large amount of fossil fuel
Cause inevitable environmental pollution.Especially nitrogen oxides as wherein primary product, can directly to human respiratory, in
Pivot nervous system, cardiovascular system etc. produce harm；Nitrogen oxides is combined with the water in air eventually change into nitric acid and nitre
Hydrochlorate, nitric acid is one of origin cause of formation of acid rain, and acid rain can decline the crops significantly underproduction, protein content and crop yield, acid
Rain can make forest and other plant leaf is withered and yellow, pest and disease damage is aggravated, final Large Scale Death；Nitrogen oxides exists with other pollutants
Under certain condition, photochemical pollution can be produced.In a word, nitrogen oxides pollution directly or indirectly endanger health,
The ecosystem and Architectural Equipment.
Regenerative combustion technology completes out kiln gas by being placed on the heat storage in burner and enters stove combustion air
Heat exchange, in stove both sides, every a pair of heat-accumulating burners are all a fired states to heat-accumulating burner mounted in pairs, another row
Cigarette state, heat is absorbed and is stored by heat storage when flue gas flows through regenerator, is substantially dropped from the temperature of the flue gas of afterbody discharge
It is low.Combustion air enters from regenerator afterbody, from head discharge.Heat storage heat release when air flows through regenerator, heat is by air
Absorption is heated to high temperature (only lower than high-temperature flue-gas 50 DEG C~100 DEG C) with by air, and the air after heating participates in burning.It is fixed
Shi Jinhang commutates, and the burner of original burning is discharged fume, and the burner combustion discharged fume originally, constantly go round and begin again.
Heat accumulating type high temperature air combustion technology has following features：The thermal efficiency of various industrial furnaces or boiler is improved, averagely
Energy-conservation more than 30% improves the effect of the stove thermal efficiency, energy-saving and emission-reduction to reach；Exhaust gas temperature is low, and waste heat recovery is not needed substantially
System；Improve the temperature homogeneity in various industrial furnaces or boiler furnace；By various low heat values or inferior fuel high quality, save
High-grade fuel；Reduce discharges of pernicious gas such as carbon dioxide and nitrogen oxides etc..
Heat accumulating type high temperature air combustion technology, is widely used at present various fuel oils, the combustion gas in steam and hot water power industry
In boiler, be also widely used in the various heating furnaces of metallurgical machinery sector, the various kilns of building material industry, chemical industry it is various
In the various industrial furnaces of tubular heater and other industries.
Many bodies of heater can be applied to denitration control technology to control the content of nitrogen oxides in smoke evacuation, but existing denitration control
Technology processed is not suitable with the denitrating system of regenerative gas stove, because that can cause denitration insufficient, or even runs counter to desire and causes two
Secondary pollution, threatens the personal safety of administrative staff.
The content of the invention
The application is intended at least solve one of technical problem present in prior art.Therefore, the present invention is intended to provide
The denitration automatic control system of a kind of heat accumulating gas boiler, to reduce the nitrogen oxides in effluent of heat accumulating gas boiler discharge
Content.
The denitration automatic control system of heat accumulating gas boiler of the invention, heat accumulating gas boiler is provided with multiple
The burner of alternate combustion, each burner one heat storage of correspondence, is additionally provided with correspondence the multiple in the heat accumulating gas boiler
Multiple denitration nozzles that burner is set；The denitration automatic control system includes：Solution transport subsystem, compressed air conveying
System and control subsystem, wherein, the solution transport subsystem includes：Agitation Tank, NaOH solution tank NaOH, solution pressure storage tank, multiple
Solution electromagnetic valve, solution transfer pump and solution pressure pump, the Agitation Tank are used to contain denitrfying agent, and the solution transfer pump is used for
Denitrfying agent in the Agitation Tank is delivered to the NaOH solution tank NaOH, the solution pressure pump is used for denitrfying agent in the NaOH solution tank NaOH is defeated
The solution pressure storage tank is delivered to, the multiple solution electromagnetic valve is connected with the multiple denitration nozzle respectively；The compression is empty
Gas transport subsystem includes：Compressed air reservoir and multiple compressed air electromagnetic valves, the compressed air reservoir is by described more
Individual compressed air electromagnetic valve is connected with the multiple denitration nozzle respectively, the compressed air electricity at each described denitration nozzle
Magnet valve and the solution electromagnetic valve synchro switch, the compressed air electromagnetic valve are pressed when being opened with the corresponding solution electromagnetic valve
Contracting air sprays to the burner hearth of the heat accumulating gas boiler after denitrfying agent is atomized；The control subsystem includes：Flue gas
Analyzer, temperature detection part, pressure detecting part, frequency converter and PLC system, the flue gas analyzer are used to analyze from described in multiple
The nitrogen oxides in effluent content of discharge in heat storage, the temperature detection part is used to detect in multiple heat storages and described
Temperature in burner hearth, the pressure detecting part is used to detect the pressure in the burner hearth, the flue gas analyzer, the temperature detection part
It is connected with the PLC system respectively with the pressure detecting part, the frequency converter is connected with by becoming with the solution pressure pump
The rotating speed of the whole solution pressure pump of frequency modulation, the PLC system is connected with the frequency converter, and the PLC system is to reception
After temperature value, pressure value and amount of nitrogen oxides value carry out data analysis, the frequency of the frequency converter is controlled.
The denitration automatic control system of heat accumulating gas boiler according to embodiments of the present invention, for the spy of heat storage type combustion
Different structure takes the control method of uniqueness, in the denitration automatic control system using PLC system as core come safeguards system
Normal operation, solution electromagnetic valve and frequency converter perform specific action as actuator；According to boiler temperature, regenerator temperature and cigarette
The usage amount of out of stock dose of gas amount of nitrogen oxides dynamic regulation, it is to avoid cause secondary pollution, possesses intelligence, stabilization, safety, height
The characteristics of imitating, control accurate, realizes the automatically working of denitration.
In certain embodiments, the control subsystem also includes：Relay, the relay and the solution transfer pump
It is connected to control the switch of the solution transfer pump, the PLC system is connected to control the relay with the relay
Operation；Flow transmitter, the flow transmitter is located between the solution pressure storage tank and the multiple solution electromagnetic valve, institute
Flow transmitter is stated to be electrically connected with the PLC system.
In certain embodiments, the solution transport subsystem also includes：Overflow valve, the import series connection of the overflow valve connects
It is connected between the solution pressure pump and the solution pressure storage tank, the outlet of the overflow valve is connected with the NaOH solution tank NaOH.
In certain embodiments, first pressure sensing is provided between the solution pressure pump and the import of the overflow valve
Device, the first pressure sensor is electrically connected with the PLC system.
In certain embodiments, the solution pressure storage tank is provided with second pressure sensor, the second pressure sensing
Device is electrically connected with the PLC system.
In certain embodiments, the NaOH solution tank NaOH is provided with solution level bound detection piece, and the solution level is upper and lower
Limit detection piece is electrically connected with PLC system, and the PLC system is delivered to the denitration in the NaOH solution tank NaOH by the Control
Agent flux.
In certain embodiments, the Agitation Tank is provided with liquid liquid level lower limit detection piece, and the denitration automatically controls and is
System also includes alarm, described to be electrically connected with the alarm with liquid liquid level lower limit detection piece.
In certain embodiments, the 3rd pressure is provided between the compressed air reservoir and the multiple compressed air electromagnetic valve
Force snesor, the 3rd pressure sensor is electrically connected with the PLC system.
In certain embodiments, it is provided with stop valve between the compressed air reservoir and the 3rd pressure sensor.
In certain embodiments, the pressure detecting part is the 4th pressure sensor, and the temperature detection part includes detection
Second thermocouple of temperature in first thermocouple and the detection burner hearth of each accumulation of heat body temperature.
Additional aspect of the invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by practice of the invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the structural representation of the denitration automatic control system of heat accumulating gas boiler according to embodiments of the present invention.
Fig. 2 be heat accumulating gas boiler according to embodiments of the present invention denitration automatic control system in the control of each system close
The structural representation of system.
Reference：
Heat accumulating gas boiler 100, heat storage 2, the first heat storage 21, the second heat storage 22, the 3rd heat storage the 23, the 4th
Heat storage 24, denitration nozzle 3, the first denitration nozzle 31, the second denitration nozzle 32, the 3rd denitration nozzle 33, the first denitration nozzle
34、
Denitration automatic control system 200,
It is solution transport subsystem 210, Agitation Tank 211, solution transfer pump 212, NaOH solution tank NaOH 213, solution pressure pump 214, molten
Hydraulic coupling storage tank 215, solution electromagnetic valve 216, the first solution stop valve 2161, the second solution stop valve 2162, the 3rd solution are cut
Disconnected valve 2163, the 4th solution stop valve 2164, overflow valve 217,
Compressed air transport subsystem 220, compressed air reservoir 221, compressed air electromagnetic valve 222, the cut-out of the first air
Valve 2221, the second air cutoff valve 2222, the 3rd air cutoff valve 2223, the 4th air cutoff valve 2224, stop valve 223,
Control subsystem 230, flow transmitter 231, flue gas analyzer 232, the inspection of temperature detection part 233, regenerator temperature
Survey part 2331, the first regenerator temperature detection piece 23311, the second regenerator temperature detection piece 23312, the inspection of the 3rd regenerator temperature
Survey part 23313, the 4th regenerator temperature detection piece 23314, in-furnace temperature detection piece 2332, pressure detecting part 234, frequency converter
235th, relay 236, PLC system 237,
First pressure sensor 241, second pressure sensor 242, solution level bound detection piece 243, solution level
The upper limit 2431, solution level lower limit 2432, with liquid liquid level lower limit detection piece 244, the 3rd pressure sensor 245,
Industrial PC 300,
Chimney 400,
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
It is exemplary to scheme the embodiment of description, it is intended to for explaining the present invention, and be not considered as limiting the invention.
The denitration automatic control system of heat accumulating gas boiler according to embodiments of the present invention is described below with reference to Fig. 1-Fig. 2
200。
Heat accumulating gas boiler 100 is provided with the burner of multiple alternate combustions, each burner one heat storage 2 of correspondence, stores
Multiple denitration nozzles 3 that correspondence multiple burner is set are additionally provided with hot type gas fired-boiler 100.Part burner is lighted in multiple burners
After burning, the corresponding denitration nozzle 3 of burner of burning is opened, not corresponding denitration nozzle 3 is closed, the denitration nozzle 3 of opening to
Flue gas injection denitration agent solution in burner hearth, to absorb the nitrogen oxides in flue gas, reduction boiler 100 is finally in the flue gas of discharge
The content of nitrogen oxides.Explanation is needed exist for, a burner can correspond to one or more denitration nozzle 3, a denitration
Nozzle 3 can also correspond to one or more burner, be not specifically limited here.
The denitration automatic control system 200 of heat accumulating gas boiler according to embodiments of the present invention, as shown in figure 1, including：
Solution transport subsystem 210, compressed air transport subsystem 220 and control subsystem 230.This hierarchical approaches, are to convey
Two strip transmission lines of denitration agent solution and conveying compressed air respectively as a subsystem, then by the detection of each part,
Analysis, control section are individually classified as a control subsystem 230.
Wherein, solution transport subsystem 210 includes：Agitation Tank 211, NaOH solution tank NaOH 213, solution pressure storage tank 215, Duo Gerong
Liquid electromagnetic valve 216, solution transfer pump 212 and solution pressure pump 214, Agitation Tank 211 are used to contain denitrfying agent, solution transfer pump
212 are used to for denitrfying agent in Agitation Tank 211 to be delivered to NaOH solution tank NaOH 213, and solution pressure pump 214 is used for denitration in NaOH solution tank NaOH 213
Agent is delivered to solution pressure storage tank 215, and multiple solution electromagnetic valves 216 are connected with multiple denitration nozzles 3 respectively.
Millworker can be directly poured into Agitation Tank 211 denitration agent solution, the conveying of denitrfying agent afterwards, traffic management and control,
Injection will be completed by solution transport subsystem 210.Denitrfying agent by solution transfer pump 212 in Agitation Tank 211 by pumping into NaOH solution tank NaOH
In 213, terminal of the NaOH solution tank NaOH 213 equivalent to denitrfying agent.Denitrfying agent is delivered to by solution pressure pump 214 in NaOH solution tank NaOH 213
In solution pressure storage tank 215 so that liquid reaches certain hydraulic pressure in solution pressure storage tank 215.Solution pressure storage tank 215 connects afterwards
Multiple denitration nozzles 3 are connect, the injection of denitrfying agent is controlled at each denitration nozzle 3 by a solution electromagnetic valve 216.Due to solution
Solution has in certain hydraulic pressure, therefore solution pressure storage tank 215 solution can automatic stream multiple solution electromagnetism in pressure vessel 215
Valve 216, after solution electromagnetic valve 216 is opened, denitrfying agent it is sprayable go out.
Compressed air transport subsystem 220 includes：Compressed air reservoir 221 and multiple compressed air electromagnetic valves 222, compression
Air reservoir 221 passes through multiple compressed air electromagnetic valves 222 and is connected with multiple denitration nozzles 3 respectively.Due to compressed air reservoir
After 221 compressed air air pressure are larger, therefore compressed air electromagnetic valve 222 is opened, pressure air can automatically from denitration nozzle 3
Eject.Compressed air is passed through at denitration nozzle 3, is that the denitration agent solution of ejection is carried out into mist using the high pressure of compressed air
Change, therefore compressed air electromagnetic valve 222 at each denitration nozzle 3 needs synchro switch with solution electromagnetic valve 216, so, pressure
After be atomized for denitrfying agent by compressed air when contracting air solenoid valve 222 is opened with corresponding solution electromagnetic valve 216, spray to heat accumulating type
In the burner hearth of gas fired-boiler 100.
Control subsystem 230 includes：Flue gas analyzer 232, temperature detection part 233, pressure detecting part 234, frequency converter 235
With PLC system 237, flue gas analyzer 232 is used to analyze the nitrogen oxides in effluent content of the discharge from multiple heat storages 2, warm
Degree detection piece 233 is used to detect in multiple heat storages 2 and temperature in burner hearth that pressure detecting part 234 to be used to detect pressure in the burner hearth,
Flue gas analyzer 232, temperature detection part 233 and pressure detecting part 234 are connected with PLC system 237 respectively, frequency converter 235 with it is molten
Hydraulic coupling pump 214 is connected to be adjusted the rotating speed of solution pressure pump 214 by frequency conversion, and PLC system 237 is connected with frequency converter 235,
PLC system 237 controls frequency converter 235 after data analysis is carried out to the temperature value for receiving, pressure value and amount of nitrogen oxides value
Frequency.
It is understood that the nitrogen oxides in effluent content of the discharge of boiler 100 whether directly reflect denitrfying agent abundant
Nitrogen oxides is absorbed, temperature can reflect the accumulation of heat situation of boiler 100 and combustion case in heat storage 2, and pressure can be anti-in boiler 100
The safety issue of the burning of boiler 100 is reflected, therefore according to the emitted dose of these three parameter regulation denitrfying agents, not only can be beneficial to reduction
The content of nitrogen oxides in smoke evacuation, moreover it is possible to avoid the denitrfying agent for spraying into from having a negative impact the fuel combustion of boiler 100, in addition
Also ensure that air pressure is maintained in normal pressure limit in boiler 100.For example, when amount of nitrogen oxides in the smoke evacuation of boiler 100
When higher, the straying quatity of denitrfying agent can be increased；Otherwise then reduce the straying quatity of denitrfying agent.For example, pressure is higher in boiler 100
When, it is desirable to reduce emitted dose, reduce furnace pressure；Otherwise then need to increase emitted dose.Certainly, under the influence of multiple parameters, how
The straying quatity of denitrfying agent is adjusted, will be calculated according to the PLC algorithms under practical situations, be not especially limited here.
PLC system 237 changes solution in real time by the parameter of the collection in worksite such as amount of nitrogen oxides, boiler temperature, furnace pressure
The pressure of pressure vessel 215 changes the straying quatity of denitrfying agent, so as to realize automatically controlling for denitrating system.
The denitration automatic control system 200 of heat accumulating gas boiler according to embodiments of the present invention, for heat storage type combustion
Special construction take uniqueness control method, in the denitration automatic control system 200 using PLC system 237 as core
Carry out safeguards system normally to run, solution electromagnetic valve 216 and frequency converter 235 perform specific action as actuator；According to Boiler Furnace
The usage amount of temperature, regenerator temperature and out of stock dose of flue gas nitrogen oxide content dynamic regulation, it is to avoid cause secondary pollution, possess intelligence
Can, stabilization, it is safe efficient, control it is accurate the characteristics of, realize the automatically working of denitration.
In addition, staff can carry out monitor in real time to the various parameters in denitrification process, this programme is highly integrated, fits
For regenerative gas system, also there is splendid reference function for polytype industrial fuel gas heating furnace.
In some embodiments of the invention, as shown in figure 1, control subsystem 230 also includes：Relay 236, relay
236 are connected with solution transfer pump 212 to control the switch of solution transfer pump 212, and PLC system 237 is connected to control with relay 236
The operation of relay processed 236.So, liquid can be by the control automatic transport of control subsystem 230 to solution in Agitation Tank 211
In tank 213.Certainly, the switch of solution transfer pump 212 can be by other modes control, such as time opening etc..
In certain embodiments, as shown in figure 1, control subsystem 230 also includes：Flow transmitter 231, flow transmitter
231 are located between solution pressure storage tank 215 and multiple solution electromagnetic valves 216, and flow transmitter 231 is electrically connected with PLC system 237
Connect, the flow of the denitrfying agent of the multiple solution electromagnetic valves 216 of the detectable flow direction of flow transmitter 231.Here by flow transmitter
231 detection data, can be easy to the aggregated flows parameter of PLC system 237, further the conveying of accurate adjustment solution pressure pump 214
Amount.
Specifically, in solution transport subsystem 210, each solution electromagnetic valve 216 is solution stop valve.
In certain embodiments, as shown in figure 1, solution transport subsystem 210 also includes：Overflow valve 217, overflow valve 217
Import be connected in series between solution pressure pump 214 and solution pressure storage tank 215, the outlet of overflow valve 217 and NaOH solution tank NaOH 213
It is connected.So, can reach pressure stabilization function so that solution flowing stabilization between solution pressure pump 214 and solution pressure storage tank 215.
In certain embodiments, as shown in figure 1, being provided with the first pressure between the import of solution pressure pump 214 and overflow valve 217
Force snesor 241, first pressure sensor 241 is electrically connected with PLC system 237.So, can real-time detection solution pressure pump 214
The solution hydraulic pressure of solution pressure storage tank 215 is pumped into, is easy to PLC system 237 to improve control accuracy.
In certain embodiments, as shown in figure 1, solution pressure storage tank 215 is provided with second pressure sensor 242, second
Pressure sensor 242 is electrically connected with PLC system 237.So, can solution pressure in real-time detection solution pressure storage tank 215, be easy to
PLC system 237 improves control accuracy.
In certain embodiments, NaOH solution tank NaOH 213 is provided with solution level bound detection piece 243, solution level bound
Detection piece 243 is electrically connected with PLC system 237, and PLC system 237 controls to be delivered to de- in NaOH solution tank NaOH 213 by relay 236
Nitre agent flux.
Specifically, solution level bound detection piece 243 includes：The solution level upper limit 2431 and solution level lower limit
2432, when solution level is higher than higher limit in the solution level upper limit 2431 detects NaOH solution tank NaOH 213, controlled by PLC system 237
Solution transfer pump processed 212 stops conveying；When solution level lower limit 2432 detects that solution level is less than lower limit in NaOH solution tank NaOH 213
When, control solution transfer pump 212 to start operating by PLC system 237.So, amount of solution in NaOH solution tank NaOH 213 can be avoided less and
Cause the situation of cutout, also avoid amount of solution in NaOH solution tank NaOH 213 from excessively causing the problem of hypertonia.
In certain embodiments, Agitation Tank 211 is provided with liquid liquid level lower limit detection piece 244, denitration automatic control system
200 also include alarm, are electrically connected with alarm with liquid liquid level lower limit detection piece 244.Can so remind millworker timely
Make-up solution.
In the compressed air transport subsystem 220 of the embodiment of the present invention, each compressed air electromagnetic valve 222 is air
Stop valve.
In certain embodiments, as shown in figure 1, being set between compressed air reservoir 221 and multiple compressed air electromagnetic valves 222
Have the 3rd pressure sensor 245, the 3rd pressure sensor 245 is electrically connected with PLC system 237, so can when detect that compression is empty in fact
The air pressure of the discharge of gas storage tank 221, is beneficial to regulation compressed air straying quatity.
In certain embodiments, cut as shown in figure 1, being provided between the pressure sensor 245 of compressed air reservoir 221 and the 3rd
Disconnected valve 223.The setting of stop valve 223 herein, can close compressed air reservoir 221, it is ensured that system when boiler 100 shuts down
Safety in operation.
In an embodiment of the present invention, pressure detecting part 234 is the 4th pressure sensor, and temperature detection part 233 includes using
In detect each heat storage 2 in temperature regenerator temperature detection piece 2331 and for detect temperature in burner hearth in-furnace temperature examine
Survey part 2332.
Alternatively, regenerator temperature detection piece 2331 and in-furnace temperature detection piece 2332 are thermocouple.
In embodiments of the present invention, as shown in figure 1, each heat storage 2 is connected with chimney 400, the flue gas of discharge is from cigarette
Arranged at chimney 400 to air, flue gas analyzer 232 is connected on pipeline of the row of boiler 100 to chimney 400.
In the specific embodiment of Fig. 1, heat accumulating gas boiler 100 includes four burners, is correspondingly provided with four heat storages
2, this four heat storages 2 are respectively the first heat storage 21, the second heat storage 22, the 3rd heat storage 23 and the 4th heat storage 24.Pot
Four denitration nozzles 3 are additionally provided with stove, this four denitration nozzles 3 are respectively the first denitration nozzle 31, the second denitration nozzle 32, the
Three denitration nozzles 33 and the first denitration nozzle 34.
In temperature detection part 233, the regenerator temperature detection piece 2331 of four heat storages 2 of correspondence is respectively：First accumulation of heat
Temperature detection piece 23311, the second regenerator temperature detection piece 23312, the 3rd regenerator temperature detection piece 23313 and the 4th store
Hot temperature detection piece 23314.This four regenerator temperature detection pieces 2331 and in-furnace temperature detection piece 2332 are thermoelectricity
It is even.
At four denitration nozzles 3, four solution electromagnetic valves 216 are corresponded to respectively, this four solution electromagnetic valves 216 are respectively
First solution stop valve 2161, the second solution stop valve 2162, the 3rd solution stop valve 2163 and the 4th solution stop valve 2164；
Four compressed air electromagnetic valves 222 are corresponded to respectively, and this four compressed air electromagnetic valves 222 are respectively the first air cutoff valve
2221st, the second air cutoff valve 2222, the 3rd air cutoff valve 2223 and the 4th air cutoff valve 2224.
In embodiments of the present invention, it is also possible to which the denitration automatic control system 200 of heat accumulating gas boiler is used into key-course
The relation hierarchy of level.
As in one embodiment as shown in figure 2,200 points of denitration automatic control system is three parts：
First, master system is made up of Industrial PC 300, including：The input equipments such as display, main frame and keyboard；
2nd, PLC system 237, including：Power module, CPU module, data signal input module, data signal output mould
Block, analog signalses input module, analog signalses output module etc.；
3rd, field instrument and executing agency, including：Solution pressure detection piece, flow transmitter 231, flue gas analyzer
232nd, the solution level bound detection piece 243, boiler with liquid liquid level lower limit detection piece 244, NaOH solution tank NaOH 213 of Agitation Tank 211
Temperature detection part 233, the furnace pressure detection piece 234 of boiler 100, the first regenerator temperature detection piece 23311, in 100 burner hearths
Two regenerator temperature detection pieces 23312, the 3rd regenerator temperature detection piece 23313, the 4th regenerator temperature detection piece 23314,
First solution stop valve 2161, the second solution stop valve 2162, the 3rd solution stop valve 2163, the 4th solution stop valve 2164,
First air cutoff valve 2221, the second air cutoff valve 2222, the 3rd air cutoff valve 2223, the 4th air cutoff valve 2224,
Frequency converter 235, solution pressure pump 214, relay 236 and solution transfer pump 212.
Field instrument and executing agency's installation site are according to as shown in figure 1, all field instruments and executing agency are all connected with
PLC system 237, PLC system 237 connects Industrial PC 300 by data communication line, and the operation of system is independent of Industrial PC 300.Compile
The monitoring programme of the control program of PLC system processed 237 and host computer Industrial PC 300, the program of PLC system 237 reads field instrument
Return value, the operation of the live executing agency of control, solution pressure pump 214 is controlled by frequency converter 235, by relay 236
Control solution transfer pump 212., used as watch-dog, detection and record related data and alarm are in case inquiry for Industrial PC 300.
During system operation, the denitrfying agent that concentration will have been configured first adds Agitation Tank 211, and PLC system 237 passes through relay
Be transported to solution in Agitation Tank 211 in NaOH solution tank NaOH 213 by 236 control solution transfer pumps 212, and NaOH solution tank NaOH is worked as during normal operation
When liquid level of solution is less than lower limit in 213, solution transfer pump 212 is automatically turned on and conveys solution to NaOH solution tank NaOH 213, when NaOH solution tank NaOH 213
When interior liquid level is higher than the upper limit, solution transfer pump 212 stops, and solution is less than lower limit alarm prompting filling solution in Agitation Tank 211.
Denitration agent solution is injected in solution pressure storage tank 215 by solution pressure pump 214, and solution passes through solution pressure storage tank
Excessively stream transmitter 231 is connected with solution electromagnetic valve 216 after 215.When denitration is needed, corresponding solution electromagnetic valve 216 and pressure
Contracting air solenoid valve 222 is opened, and compressed air will be sprayed onto in high-temperature flue gas after denitrfying agent solution atomization, realizes the mesh of denitrating flue gas
's.
Constantly commutation is needed due to heat storage type combustion to reach the purpose of efficient burning, out of stock nozzle needs and boiler combustion
System carries out chain, the both sides of heat accumulating type boiler 100 such as is respectively defined as into A sides and B sides, then when A sides burner works
A sides denitration nozzle 3 is opened, B sides denitration nozzle 3 is opened when B sides burner works.Reversal valve when being commutated due to boiler 100
Switch has certain time delay, so to consider the problem of time delay when denitration nozzle 3 is opened.
Flue gas nitrogen oxide content is gathered by flue gas analyzer 232, and the fire box temperature of boiler 100 is adopted by hearth thermocouple
Collection, the temperature of heat storage 2 is transferred to PLC system 237 respectively by the thermocouple on heat storage 2.Calculated by internal processes, will counted
Calculate result and send frequency converter 235, the frequency of frequency converter 235 to as the input quantity communication of the frequency converter 235 of solution pressure pump 214
The rotating speed of compression pump is influenceed, and the rotating speed of compression pump can directly change the pressure size of solution pressure storage tank 215, and then change spray
The amount of the denitrfying agent being mapped in burner hearth, realizes the input quantity of precise control denitrfying agent, that is, the purpose for reaching denitration is not resulted in again
Produce because the use of excessive denitrfying agent causes secondary pollution.The frequency of frequency converter 235 is with nitrogen oxides in flue gas analyzer 232
The change of content and dynamic change, the temperature of thermocouple measurement heat storage 2 in heat storage 2, it is ensured that the thermal efficiency of whole boiler 100
Will not reduce.
When the liquid level lower limit of NaOH solution tank NaOH 213 is triggered, it is molten by the automatic of relay 236 that PLC system 237 sends instruction
Liquid delivery pump 212, denitration agent solution is filled from Agitation Tank 211 to NaOH solution tank NaOH 213, and the liquid level of NaOH solution tank NaOH 213 is reached when liquid level rises
During the upper limit, PLC system 237 sends instruction and is automatically stopped solution transfer pump 212.When the liquid level lower limit of Agitation Tank 211 is triggered,
PLC system 237 sends instruction and is automatically stopped solution transfer pump 212, while sound and light alarm prompting operating personnel's configuration filling denitration
Agent solution.
Other numerical value by host computer monitor in real time, can ensure the stable operation of equipment.The pressure of solution pressure storage tank 215
Power, the flow of denitration solution, furnace temperature, furnace pressure, regenerator temperature, the content of the nitrogen oxides of flue gas analyzer 232, compressed air
Pressure, the on off state of each electromagnetic pneumatic valve, and the running status of whole system can be by Computer display
Device shows.
Whole system is desirably integrated into boiler 100 control system of itself, it is also possible to run as an autonomous system,
It is convenient, flexible, it is convenient to carry out.
In the description of the invention, it is to be understood that term " " center ", " on ", D score, " vertical ", " level ",
The orientation or position relationship of the instruction such as " top ", " bottom ", " interior ", " outward " are, based on orientation shown in the drawings or position relationship, to be only
Described with simplified for the ease of the description present invention, must be with specific side rather than the device or element for indicating or imply meaning
Position, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In the description of the invention, unless otherwise indicated, " multiple " is meant that two
Individual or two or more.
In the description of the invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ",
" fixation " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be machinery
Connection, or electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two elements
Internal connection or two interaction relationships of element.For the ordinary skill in the art, can be with concrete condition
Understand above-mentioned term concrete meaning in the present invention.
In the description of this specification, the description of reference term " embodiment ", " example " etc. mean to combine the embodiment or
Specific features, structure, material or the feature that example is described are contained at least one embodiment of the invention or example.At this
In specification, the schematic representation to above-mentioned term is not necessarily referring to identical embodiment or example.And, description it is specific
Feature, structure, material or feature can in an appropriate manner be combined in one or more any embodiments or example.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
Can these embodiments be carried out with various changes, modification, replacement and modification in the case of departing from principle of the invention and objective, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
1. the denitration automatic control system of a kind of heat accumulating gas boiler, it is characterised in that heat accumulating gas boiler is provided with many
The burner of individual alternate combustion, each burner one heat storage of correspondence, is additionally provided with correspondence described many in the heat accumulating gas boiler
Multiple denitration nozzles that individual burner is set；
The denitration automatic control system includes：Solution transport subsystem, compressed air transport subsystem and control subsystem, its
In,
The solution transport subsystem includes：Agitation Tank, NaOH solution tank NaOH, solution pressure storage tank, multiple solution electromagnetic valves, solution conveying
Pump and solution pressure pump, the Agitation Tank are used to contain denitrfying agent, and the solution transfer pump is used for denitration in the Agitation Tank
Agent is delivered to the NaOH solution tank NaOH, and the solution pressure pump is used to for denitrfying agent in the NaOH solution tank NaOH to be delivered to the solution pressure storage
Tank, the solution pressure storage tank is connected with the multiple solution electromagnetic valve, the multiple solution electromagnetic valve respectively with it is the multiple
Denitration nozzle is connected；
The compressed air transport subsystem includes：Compressed air reservoir and multiple compressed air electromagnetic valves, the compressed air
Storage tank is connected with the multiple denitration nozzle respectively by the multiple compressed air electromagnetic valve, at each described denitration nozzle
The compressed air electromagnetic valve and the solution electromagnetic valve synchro switch, the compressed air electromagnetic valve and the corresponding solution
Compressed air is sprayed to the burner hearth of the heat accumulating gas boiler after denitrfying agent is atomized when magnetic valve is opened；
The control subsystem includes：Flue gas analyzer, temperature detection part, pressure detecting part, frequency converter and PLC system, it is described
Flue gas analyzer is used to analyze the nitrogen oxides in effluent content discharged from multiple heat storages, and the temperature detection part is used
In detecting in multiple heat storages and temperature in the burner hearth, the pressure detecting part is used to detect the pressure in the burner hearth,
The flue gas analyzer, the temperature detection part and the pressure detecting part are connected with the PLC system respectively, the frequency converter
It is connected to adjust the rotating speed of the solution pressure pump, the PLC system and the frequency conversion by frequency conversion with the solution pressure pump
Device is connected, and the PLC system is controlled after data analysis is carried out to the temperature value for receiving, pressure value and amount of nitrogen oxides value
The frequency of the frequency converter.
2. the denitration automatic control system of heat accumulating gas boiler according to claim 1, it is characterised in that the control
Subsystem also includes：Relay, the relay is connected with the solution transfer pump to control the switch of the solution transfer pump,
The PLC system is connected to control the operation of the relay with the relay；
Flow transmitter, the flow transmitter is located between the solution pressure storage tank and the multiple solution electromagnetic valve, institute
Flow transmitter is stated to be electrically connected with the PLC system.
3. the denitration automatic control system of heat accumulating gas boiler according to claim 1, it is characterised in that the solution
Transport subsystem also includes：Overflow valve, the import of the overflow valve is connected in series in the solution pressure pump and the solution pressure
Between power storage tank, the outlet of the overflow valve is connected with the NaOH solution tank NaOH.
4. the denitration automatic control system of heat accumulating gas boiler according to claim 3, it is characterised in that the solution
First pressure sensor, the first pressure sensor and the PLC systems are provided between the import of compression pump and the overflow valve
System electrical connection.
5. the denitration automatic control system of heat accumulating gas boiler according to claim 1, it is characterised in that the solution
Pressure vessel is provided with second pressure sensor, and the second pressure sensor is electrically connected with the PLC system.
6. the denitration automatic control system of heat accumulating gas boiler according to claim 2, it is characterised in that the solution
Tank is provided with solution level bound detection piece, and the solution level bound detection piece is electrically connected with PLC system, the PLC
System is delivered to the denitration agent flux in the NaOH solution tank NaOH by the Control.
7. the denitration automatic control system of heat accumulating gas boiler according to claim 1, it is characterised in that described with liquid
Tank is provided with liquid liquid level lower limit detection piece, and the denitration automatic control system also includes alarm, described with liquid liquid level lower limit
Detection piece is electrically connected with the alarm.
8. the denitration automatic control system of heat accumulating gas boiler according to claim 1, it is characterised in that the compression
The 3rd pressure sensor, the 3rd pressure sensor and institute are provided between air reservoir and the multiple compressed air electromagnetic valve
State PLC system electrical connection.
9. the denitration automatic control system of heat accumulating gas boiler according to claim 8, it is characterised in that the compression
Stop valve is provided between air reservoir and the 3rd pressure sensor.
10. the denitration automatic control system of the heat accumulating gas boiler according to any one of claim 1-9, its feature exists
In the pressure detecting part is the 4th pressure sensor, and the temperature detection part includes detecting each described accumulation of heat body temperature
The first thermocouple and the detection burner hearth in temperature the second thermocouple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611156535.3A CN106843123A (en) | 2016-12-14 | 2016-12-14 | The denitration automatic control system of heat accumulating gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611156535.3A CN106843123A (en) | 2016-12-14 | 2016-12-14 | The denitration automatic control system of heat accumulating gas boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106843123A true CN106843123A (en) | 2017-06-13 |
Family
ID=59140129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611156535.3A Pending CN106843123A (en) | 2016-12-14 | 2016-12-14 | The denitration automatic control system of heat accumulating gas boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106843123A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732928A (en) * | 2018-09-19 | 2018-11-02 | 南京蔚岚环境技术研究院有限公司 | Hydrocone type industrial source denitration control system and control method |
| CN109200779A (en) * | 2017-07-04 | 2019-01-15 | 北京英斯派克科技有限公司 | A kind of device and method for the combustion zone denitration of carbon electrode open roasting furnace |
-
2016
- 2016-12-14 CN CN201611156535.3A patent/CN106843123A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109200779A (en) * | 2017-07-04 | 2019-01-15 | 北京英斯派克科技有限公司 | A kind of device and method for the combustion zone denitration of carbon electrode open roasting furnace |
| CN108732928A (en) * | 2018-09-19 | 2018-11-02 | 南京蔚岚环境技术研究院有限公司 | Hydrocone type industrial source denitration control system and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NO316929B1 (en) | Washing of flue gas and waste heat recovery system | |
| CN103759277A (en) | Intelligent soot blowing closed-loop control method, device and system for coal-fired power station boiler | |
| CN105920997B (en) | A kind of coal-burning boiler denitrating system that burnout degree is coupled with SNCR and method | |
| CN103017177A (en) | Incineration disposal method for high-salinity wastewater | |
| CN206322002U (en) | The denitration automatic control system of heat accumulating gas boiler | |
| CN106843123A (en) | The denitration automatic control system of heat accumulating gas boiler | |
| CN207132319U (en) | A kind of gas-steam boiler | |
| CN104930526B (en) | A kind of curtain air system for shock-wave ash blowing | |
| CN202070175U (en) | Steam heating liquid ammonia evaporator used for smoke gas denitration | |
| von der Heide | Advanced SNCR technology for power plants | |
| CN207716647U (en) | Energy-saving, environmental protection boiler | |
| CN205361068U (en) | SNCR of rubbish power plant - low temperature SCR allies oneself with flue gas processing system of usefulness | |
| CN105233669B (en) | A kind of denitrating flue gas SCR system | |
| CN208542022U (en) | Incineration flue gas non-catalytic reduction denitrating system based on high concentration reducing agent | |
| CN110787609A (en) | Flue gas denitration device for tank furnace and denitration method thereof | |
| CN206621993U (en) | A kind of SCR denitration smoke temperature adjusting system | |
| CN206008448U (en) | A kind of denitration spray gun special with automatic extending-contracting apparatus | |
| CN204358691U (en) | Waste heat boiler | |
| CN109489353A (en) | Industrial baking oven exhaust heat recovery apparatus | |
| CN207654936U (en) | A kind of SNCR denitration system | |
| CN206439850U (en) | A kind of fountain flue gas waste heat recovery and cleaning system | |
| CN208519748U (en) | A kind of biomass combustion heating cycle system | |
| CN207591579U (en) | A kind of desulphurization system | |
| CN205783024U (en) | Flue gas recirculation energy-saving and emission-reduction intelligent apparatus | |
| CN206018596U (en) | A kind of novel environment friendly denitrogenates boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 102200 Beijing city Changping District Machi Town cow Road No. 18 Applicant after: Shenwu science and technology group Limited by Share Ltd Address before: 102200 Beijing city Changping District Machi Town cow Road No. 18 Applicant before: Beijing Shenwu Environment Energy Technology Group Co., Ltd. |