CN212417537U - Burn burning furnace flue gas degree of depth denitration processing system - Google Patents
Burn burning furnace flue gas degree of depth denitration processing system Download PDFInfo
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- CN212417537U CN212417537U CN202021036957.9U CN202021036957U CN212417537U CN 212417537 U CN212417537 U CN 212417537U CN 202021036957 U CN202021036957 U CN 202021036957U CN 212417537 U CN212417537 U CN 212417537U
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Abstract
The utility model discloses an burn burning furnace flue gas degree of depth denitration processing system, it is including the storage unit that is used for preparing and storing the reductant, the conveying unit that is used for carrying the reductant, the injection unit that is used for spraying the reductant, set up on burning furnace and be used for detecting the sound wave temperature measuring device who burns burning furnace internal temperature, the storage unit passes through the conveying unit intercommunication with the injection unit, the storage unit includes solution preparation jar, solution preparation jar sets up a plurality ofly, and each solution preparation jar connects in parallel and sets up in the conveying unit, sound wave temperature measuring device sets up a plurality ofly along burning furnace, and each sound wave temperature measuring device corresponds respectively and burns a plurality of sound wave temperature measurement subregion of dividing in the furnace, spray the multilayer spray gun that the unit set up including corresponding a plurality of sound wave temperature measurement subregion, set up a plurality of spray. The utility model provides high system's security and stability have improved denitration efficiency, have reduced ammonia escape and have polluted, have good application prospect.
Description
Technical Field
The utility model relates to an burn burning furnace flue gas degree of depth denitration treatment system.
Background
The incinerator can generate a large amount of pollutants when incinerating substances such as household garbage, straws, industrial wastes and the like, the pollutants are mainly discharged along with flue gas, and the flue gas carries a large amount of pollutants (mainly containing acidic gas SO)2Nitrogen oxide NOxAnd dust, etc.) require a cleaning process. The invention is mainly directed to NOxAnd (4) controlling.
Incinerator flue gas NOxThe emission control means mainly comprises SCR and SNCR technologies, and SNCR is widely used as a common denitration mode due to the characteristics of low investment, low operation cost, moderate efficiency and the like.
The principle of the SNCR technology is that a denitration reducing agent is sprayed into a proper temperature field in an incinerator and stays for a certain time in the temperature range. Due to the fact that the working condition of the incinerator is unstable, the temperature distribution of smoke in the incinerator is uneven, the denitration effect of the SNCR system cannot reach the expected value, meanwhile, the sprayed reducing agent is not subjected to denitration reaction and is discharged into the atmosphere along with a chimney, and ammonia escape pollution is caused.
Accordingly, further improvements and improvements are needed in the art.
SUMMERY OF THE UTILITY MODEL
Aiming at various defects in the prior art, in order to solve the problems, the deep denitration treatment system for the flue gas of the incinerator is provided, so that the safety and the stability of the system are improved, the denitration efficiency is improved, the consumption of a reducing agent is reduced, the ammonia escape pollution is reduced, and the automation degree of the system is improved.
In order to achieve the purpose, the following technical scheme is provided:
the storage unit is communicated with the injection unit through the conveying unit, the storage unit comprises a plurality of solution preparation tanks, the solution preparation tanks are arranged in the conveying unit in parallel, the sound wave temperature measuring devices are arranged along the hearth of the incinerator and respectively correspond to a plurality of sound wave temperature measuring partitions divided in the hearth of the incinerator, the injection unit comprises a plurality of layers of spray guns corresponding to the sound wave temperature measuring partitions, and a plurality of spray guns are arranged in each layer of spray guns and are independently controlled.
Further, solution preparation jar is including level gauge, agitator, the heater that is used for monitoring solution preparation jar interior liquid level, be used for adding the loading hopper that waits to prepare the reductant, the liquid outlet that is used for pouring into the water filling port and the output preparation of demineralized water and accomplish the reductant, the level gauge sets up on solution preparation jar lateral wall, agitator and heater set up respectively in solution preparation jar, water filling port and loading hopper set up respectively in the top of solution preparation jar, the liquid outlet sets up in the bottom of solution preparation jar.
The conveying unit comprises a conveying pipeline, a first switch valve, a solution conveying pump, a second switch valve, a first regulating valve, a first flowmeter, a third switch valve arranged in front of each layer of spray guns, a fourth switch valve and a second regulating valve which are arranged in each layer of spray guns and used for controlling a single spray gun, and a second flowmeter, wherein the first switch valve, the solution conveying pump, the second switch valve, the first regulating valve, the first flowmeter, the third switch valve, the fourth switch valve, the second regulating valve and the second flowmeter are sequentially arranged along the conveying pipeline, the conveying unit further comprises a pressure stabilizing valve used for ensuring the pressure stability of the solution pipeline, one end of the pressure stabilizing valve is communicated with the solution storage tank through the conveying pipeline, and the other end of the pressure stabilizing valve is communicated with the conveying pipeline between the solution conveying pump and the second switch valve.
Further, the first switch valve corresponds the solution preparation jar and sets up a plurality ofly, all sets up first switch valve between the liquid outlet of each solution preparation jar and the pipeline.
Further, the solution delivery pumps are arranged in two, and the two solution delivery pumps are arranged in the delivery pipeline in parallel.
Furthermore, the sound wave temperature measuring device consists of a sound wave emitter and a sound wave receiver, and the sound wave emitter and the sound wave receiver are symmetrically arranged on the side wall of the hearth of the incinerator.
Preferably, the spray gun is an automatic telescopic spray gun.
Further, the incinerator flue gas deep denitration treatment system also comprises a central control unit, and the central control unit is respectively in signal connection with the heater, the first switch valve, the solution delivery pump, the second switch valve, the first regulating valve, the first flow meter, the third switch valve, the fourth switch valve, the second regulating valve, the second flow meter and the sound wave temperature measuring device through lines.
Advantageous effects
The utility model provides an burn burning furnace flue gas degree of depth denitration treatment system has following beneficial effect:
(1) the preparation process of the reducing agent is optimized, and the safety and the stability of the system are improved;
(2) the temperature measurement mode of the denitration system is optimized, the denitration efficiency is improved, the consumption of the reducing agent is reduced, and the ammonia escape pollution can be reduced.
(3) The structure and the working mode of the spray gun are optimized, the automation degree of the system is improved, and the damage of the spray gun under the high-temperature condition for a long time is avoided.
Drawings
FIG. 1 is a schematic structural view of a system for deep denitration treatment of flue gas from an incinerator in embodiment 1 of the present invention;
fig. 2 is a plan view of the acoustic temperature measuring device according to embodiment 1 of the present invention.
In the figure: 100-solution preparation tank, 110-liquid level meter, 120-heater, 130-stirrer, 140-loading hopper, 210-conveying pipeline, 211-first switch valve, 212-second switch valve, 213-third switch valve, 214-fourth switch valve, 220-solution conveying pump, 231-first regulating valve, 232-second regulating valve, 241-first flow meter, 242-second flow meter, 250-pressure maintaining valve, 300-spray gun, 400-sound wave temperature measuring device and 500-boiler section.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following description, together with the drawings of the present invention, clearly and completely describes the technical solution of the present invention, and based on the embodiments in the present application, other similar embodiments obtained by those skilled in the art without creative efforts shall all belong to the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustration and not for limitation of the present invention.
Detailed description of the preferred embodiment 1
An incinerator flue gas deep denitration treatment system is shown in fig. 1 and comprises a storage unit for preparing and storing a reducing agent, a conveying unit for conveying the reducing agent, a spraying unit for spraying the reducing agent, and an acoustic wave temperature measuring device 400 arranged on an incinerator and used for detecting the temperature in a hearth of the incinerator. The storage unit is communicated with the spraying unit through the conveying unit.
Specifically, the storage unit includes a plurality of solution preparation tanks 100, and the solution preparation tanks 100 are provided in plurality, and the solution preparation tanks 100 are provided in the transport unit in parallel. The plurality of solution preparation tanks 100 are mutually standby, and the reducing agent prepared in the solution preparation tank 100 is directly stored in the solution preparation tank 100, so that the uncertainty that the preparation is lack of standby by adopting a single solution preparation tank 100 and a single solution storage tank in the prior art is avoided.
Preferably, the solution preparation tanks 100 are provided in two sets, and are switched to use.
Specifically, as shown in fig. 2, a plurality of sound wave temperature measuring devices 400 are arranged along the incinerator hearth, and each sound wave temperature measuring device 400 corresponds to a plurality of sound wave temperature measuring partitions partitioned in the incinerator hearth. The sound wave temperature measuring device 400 is composed of a sound wave transmitter and a sound wave receiver, which are symmetrically arranged on the side wall of the incinerator hearth. By adopting the sound wave temperature measurement technology, the temperature of the section 500 of the whole boiler can be obtained in real time, the heat of the boiler is gradually absorbed and utilized by the waste heat boiler along with the rising of the flue gas, and the temperature of the flue gas is reduced, so that the three-dimensional temperature field of the waste heat boiler is simulated.
Specifically, the injection unit comprises a plurality of layers of spray guns 300 which are arranged corresponding to the plurality of sound wave temperature measurement zones, a plurality of spray guns 300 are arranged in each layer of spray gun 300, and each spray gun 300 is independently controlled, so that the automation level is improved. The number and the number of the layers of the spray guns 300 can be adjusted according to the actual conditions of the items such as the size of a boiler, the type of an incinerator and the like.
Specifically, solution preparation jar 100 is including level gauge 110, agitator 130, the heater 120 that is used for monitoring liquid level in solution preparation jar 100, be used for adding the loading hopper 140 of waiting to prepare the reductant, be used for pouring into the water filling port of demineralized water and the liquid outlet of output preparation completion reductant, level gauge 110 sets up on solution preparation jar 100 lateral wall, agitator 130 and heater 120 set up respectively in solution preparation jar 100, water filling port and loading hopper set up respectively in the top of solution preparation jar 100, the liquid outlet sets up in the bottom of solution preparation jar 100.
Specifically, the delivery unit includes a delivery pipe 210, a first switching valve 211, a solution delivery pump 220, a second switching valve 212, a first regulating valve 231, a first flow meter 241, a third switching valve 213 disposed in front of each layer of spray guns 300, a fourth switching valve 214 and a second regulating valve 232 disposed in each layer of spray guns 300 for controlling the individual spray guns 300, a second flow meter 242, the first switch valve 211, the solution delivery pump 220, the second switch valve 212, the first regulating valve 231, the first flow meter 241, the third switch valve 213, the fourth switch valve 214, the second regulating valve 232 and the second flow meter 242 are sequentially arranged along the delivery pipeline 210, the delivery unit further comprises a pressure maintaining valve 250 for ensuring the pressure stability of the solution pipeline, one end of a pressure stabilizing valve 250 is communicated with the solution storage tank through a conveying pipeline 210, and the other end is communicated with the conveying pipeline 210 between the solution conveying pump 220 and a second switch valve 212.
The utility model discloses well surge damping valve 250 can adopt other pressure stabilizing device to replace, the utility model discloses a surge damping valve 250 only is the setting of this scheme preferred.
Specifically, the first switch valve 211 is provided in plurality corresponding to the solution preparation tanks 100, and the first switch valve 211 is provided between the liquid outlet of each solution preparation tank 100 and the delivery pipe 210.
Specifically, two solution delivery pumps 220 are provided, and the two solution delivery pumps 220 are arranged in the delivery pipeline 210 in parallel.
Specifically, the incinerator flue gas deep denitration treatment system further comprises a central control unit, and the central control unit is in signal connection with the heater 120, the first switch valve 211, the solution delivery pump 220, the second switch valve 212, the first regulating valve 231, the first flow meter 241, the third switch valve 213, the fourth switch valve 214, the second regulating valve 232, the second flow meter 242 and the sound wave temperature measuring device 400 through lines.
Preferably, the spray gun 300 is a self-retracting spray gun 300. Each spray gun 300 can be controlled individually, increasing the level of automation of the system.
Preferably, the automatic retractable spray gun 300 is provided in three layers.
Specifically, the incinerator flue gas deep denitration treatment system controls the action of each spray gun 300 according to the temperature data provided by the three-dimensional temperature field, only the proper spray gun 300 needs to be selected in the proper temperature area to work, the working spray gun 300 is ensured to be in the optimal working condition, and the injected reducing agent and NO in the flue gas can be mixedxThe reaction is carried out, the denitration efficiency is improved, and the material consumption and ammonia escape are reduced. In the prior art, the SNCR spray guns 300 work or quit simultaneously in the whole layer, and because the working conditions of each spray gun 300 are different, part of the urea solution sprayed by the spray guns 300 cannot be matched with NO in the smokexThe reaction occurs, so that the overall denitration efficiency of the SNCR system is lowThe escape rate of ammonia is high, and environmental pollution is caused.
Compare in prior art conventional point temperature measurement technique, the utility model discloses a more accurate sound wave temperature measurement technique not only can acquire the temperature data of whole boiler cross-section 500 in real time, but also can simulate from this and obtain the temperature field of whole boiler, has avoided prior art mid point temperature measurement technique to exist great error defect owing to can only acquire the temperature data of temperature measurement point.
During specific use, conventional SNCR technique adopts urea or aqueous ammonia as the reductant, and the embodiment uses urea as the example, and is right the utility model discloses a use carries out specific explanation, as follows:
an appropriate amount of demineralized water is added to the solution preparation tank 100 containing the urea solution, when the level of the demineralized water detected by the level meter 110 on the upper portion of the sidewall of the solution preparation tank 100 reaches a design value, the addition of the demineralized water is stopped, and then the heater 120 is turned on to heat the demineralized water to 40-50 ℃. The stirrer 130 is started, urea particles are added into the solution preparation tank 100 through the hopper 140, the urea particles are fully stirred by the stirrer 130 and are completely dissolved in the desalted water to prepare a urea solution, the concentration of the prepared urea solution is about 5% -40%, and urea solutions with different concentrations can be prepared according to project conditions.
The urea solution from the solution preparation tank 100 is pressurized by a solution delivery pump 220 provided on a delivery pipe 210, and then delivered to the injection area of the boiler through a second on-off valve 212, a first regulating valve 231, a first flow meter 241, a third on-off valve 213, a fourth on-off valve 214, a second flow meter 242, and a spray gun 300. And a pressure stabilizing valve 250 is arranged at the outlet of the solution delivery pump 220 to ensure the pressure of the delivery pipeline to be stable. First control valve 231 is controlled by first flow meter 241 and NO provided at the outlet of exhaust-heat boiler or at the position of chimneyXAnd the data fed back by the concentration meter is used for regulating the flow of the urea solution and controlling the total amount of the urea solution sprayed into the boiler. The second switch valve 212 is arranged on each layer of spray gun 300, so that the spray gun is convenient to use during maintenance. A number of layers of acoustic temperature measuring devices 400 are arranged on a proper boiler section 500, the measured temperature field data are processed by a central control unit and form instructions to be sent to each spray gun 300, and the instructions are sent to the front of each spray gun 300The fourth switch valve 214 is arranged, the fourth switch valve 214 is linked with the spray gun 300, when the spray gun 300 extends into the boiler according to instructions, the fourth switch valve 214 is opened, and the urea solution is sprayed into the boiler through the spray gun 300. When the spray gun 300 is withdrawn from the boiler according to the instruction, the fourth switching valve 214 is closed a few seconds in advance, and the urea solution is not sprayed into the boiler any more. In order to ensure that the flow rate of the reducing agent fed into each spray gun 300 is similar, a second regulating valve 232 and a second flow meter 242 are arranged in front of each spray gun 300. The spraying area is provided with two layers of spray guns 300 or three layers of spray guns 300, and one layer of spray gun 300 is selected according to temperature data fed back by a temperature measuring device such as a platinum thermal resistor and the like arranged on the wall of the boiler and is inserted into the boiler to work. The other layer of the lance 300 is pulled out.
In the traditional technology, as the urea solution is subjected to longer processes of preparation, transportation, storage and the like, once any equipment fails in the process, the whole system cannot provide the reducing agent, and the safety and the stability of the whole system are influenced. Therefore, the utility model discloses the system adopts two solution preparation jars 100 and pipeline parallelly connected. The two solution preparation tanks 100 are alternately used by the first switching valve 211 to supply the urea solution to the SNCR system.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, i.e. the present invention is intended to cover all equivalent variations and modifications within the scope of the present invention.
Claims (8)
1. The deep denitration treatment system for the incinerator flue gas is characterized by comprising a storage unit, a conveying unit, a spraying unit and a sound wave temperature measuring device, wherein the storage unit is used for preparing and storing a reducing agent, the conveying unit is used for conveying the reducing agent, the spraying unit is used for spraying the reducing agent, the sound wave temperature measuring device is arranged on the incinerator and used for detecting the temperature in a hearth of the incinerator, the storage unit is communicated with the spraying unit through the conveying unit, the solution preparation tanks are arranged in plurality, the solution preparation tanks are arranged in the conveying unit in parallel, the sound wave temperature measuring device is arranged in plurality along the hearth of the incinerator, the sound wave temperature measuring devices respectively correspond to a plurality of sound wave temperature measuring partitions divided in the hearth of the incinerator, the spraying unit comprises a plurality of layers of spray guns corresponding to the plurality of sound wave temperature measuring partitions, and a plurality of.
2. The incinerator flue gas deep denitration treatment system according to claim 1, wherein the solution preparation tank comprises a liquid level meter for monitoring the liquid level in the solution preparation tank, a stirrer, a heater, a hopper for adding the reducing agent to be prepared, a water injection port for injecting demineralized water, and a liquid outlet for outputting the prepared reducing agent, the liquid level meter is arranged on the side wall of the solution preparation tank, the stirrer and the heater are respectively arranged in the solution preparation tank, the water injection port and the hopper are respectively arranged at the top of the solution preparation tank, and the liquid outlet is arranged at the bottom of the solution preparation tank.
3. The incinerator flue gas deep denitration treatment system as claimed in claim 2, the conveying unit comprises a conveying pipeline, a first switch valve, a solution conveying pump, a second switch valve, a first regulating valve, a first flowmeter, a third switch valve arranged in front of each layer of spray guns, a fourth switch valve and a second regulating valve which are arranged in each layer of spray guns and used for controlling a single spray gun, and a second flowmeter, the first switch valve, the solution delivery pump, the second switch valve, the first regulating valve, the first flowmeter, the third switch valve, the fourth switch valve, the second regulating valve and the second flowmeter are sequentially arranged along the delivery pipeline, the delivery unit also comprises a pressure stabilizing valve used for ensuring the pressure stability of the solution pipeline, one end of the pressure stabilizing valve is communicated with the solution storage tank through a conveying pipeline, and the other end of the pressure stabilizing valve is communicated with the conveying pipeline between the solution conveying pump and the second switch valve.
4. The incinerator flue gas deep denitration treatment system of claim 3, wherein the first switch valve is provided in plurality corresponding to the solution preparation tanks, and the first switch valve is provided between the liquid outlet of each solution preparation tank and the transfer line.
5. The incinerator flue gas deep denitration treatment system of claim 3, wherein the solution delivery pumps are provided in two, and the two solution delivery pumps are arranged in parallel in the delivery pipe.
6. The incinerator flue gas deep denitration treatment system of claim 1, wherein the sound wave temperature measuring device is composed of a sound wave transmitter and a sound wave receiver, and the sound wave transmitter and the sound wave receiver are symmetrically arranged on the side wall of the incinerator hearth.
7. The incinerator flue gas deep denitration treatment system of claim 1, wherein said lance is an automatic telescopic lance.
8. The incinerator flue gas deep denitration treatment system of claim 3, further comprising a central control unit, wherein the central control unit is in signal connection with the heater, the first switch valve, the solution delivery pump, the second switch valve, the first regulating valve, the first flow meter, the third switch valve, the fourth switch valve, the second regulating valve, the second flow meter and the sound wave temperature measuring device through lines.
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| CN202021036957.9U CN212417537U (en) | 2020-06-08 | 2020-06-08 | Burn burning furnace flue gas degree of depth denitration processing system |
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| CN202021036957.9U CN212417537U (en) | 2020-06-08 | 2020-06-08 | Burn burning furnace flue gas degree of depth denitration processing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634111A (en) * | 2021-06-23 | 2021-11-12 | 杭州新世纪能源环保工程股份有限公司 | Efficient denitration injection apparatus in waste incineration exhaust-heat boiler stove |
| CN114849455A (en) * | 2022-04-24 | 2022-08-05 | 苏州谦恒巨环保科技有限公司 | SNCR denitration treatment boiler furnace temperature measurement control reducing agent injection system |
-
2020
- 2020-06-08 CN CN202021036957.9U patent/CN212417537U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634111A (en) * | 2021-06-23 | 2021-11-12 | 杭州新世纪能源环保工程股份有限公司 | Efficient denitration injection apparatus in waste incineration exhaust-heat boiler stove |
| CN114849455A (en) * | 2022-04-24 | 2022-08-05 | 苏州谦恒巨环保科技有限公司 | SNCR denitration treatment boiler furnace temperature measurement control reducing agent injection system |
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