Segmented combustion furnace device and ammonia-containing waste gas treatment system

Abstract

The utility model relates to the technical field of ammonia-containing waste gas treatment, in particular to a segmented combustion furnace device and an ammonia-containing waste gas treatment system, which comprise an incineration hearth, a denitration hearth and a quenching hearth, the incineration hearth and the denitration hearth are communicated, the quenching hearth is arranged between the incineration hearth and the denitration hearth, and the quenching hearth is communicated with a circulating flue gas inlet and a flow guide gas connector. A plurality of double-cavity sleeves are arranged in the quenching hearth, each double-cavity sleeve comprises an inner-layer flow channel and an outer-layer flow channel, the inner-layer flow channels are provided with spray pipes facing the incineration hearth in a communicated mode, the outer-layer flow channels are provided with nozzles facing the denitration hearth in a communicated mode, and through the spray pipes facing the incineration hearth and the nozzles facing the denitration hearth, the nozzles facing the denitration hearth are communicated with the inner-layer flow channels and the outer-layer flow channels. The temperature of the reaction gas can be quickly and uniformly reduced in the quenching hearth, and the reaction gas is quickly guided to the denitration hearth, so that the SNCR reaction rate and effect in the denitration hearth are improved, the removal rate of nitrogen oxides is effectively improved, and the pollution to the environment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to ammonia-containing waste gas treatment technical field, especially a kind of subsection combustion furnace device and ammonia-containing waste gas treatment system. BACKGROUND

[0002] SNCR technology (Selective Non-Catalytic Reduction) is a kind of denitration technology without catalyst, by using the reducing agent containing amino group in specific temperature range, nitrogen oxides (NOx) in flue gas is reduced to harmless nitrogen and water, SNCR process suitable temperature window is between 850 DEG C to 1100 DEG C, reaction temperature is too high or too low can affect the rate of denitration reaction, lead to nitrogen oxides removal rate reduction, cause the aggravation of environmental pollution.

[0003] In the prior art, when ammonia-containing waste gas is incinerated, the ammonia-containing waste gas is incinerated at a high temperature of 1300 DEG C or above in the first section of the combustion furnace hearth, and the high-temperature gas is directly introduced into the SNCR process gas for cooling and denitration reaction, resulting in uneven temperature control of the reaction gas, affecting the SNCR reaction rate, and the nitrogen oxides removal effect is poor. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of subsection combustion furnace device and ammonia-containing waste gas treatment system, introduce quenching hearth in combustion furnace device, so that the temperature of reaction gas can be evenly reduced in quenching hearth, improve SNCR reaction rate and effect.

[0005] To solve the above technical problems, the embodiment of the utility model provides a technical scheme as follows:

[0006] A subsection combustion furnace device, comprising a combustion furnace hearth and a denitration furnace hearth connected, and a quenching hearth arranged between the combustion furnace hearth and the denitration furnace hearth, the combustion furnace hearth is provided with an ammonia-containing waste gas inlet, a primary air inlet and a fuel inlet, the quenching hearth is provided with a circulating flue gas inlet and a guide gas interface, the denitration furnace hearth is provided with an amino reducing agent inlet, the quenching hearth is provided with a plurality of double-cavity sleeves, the double-cavity sleeve comprises an inner layer flow channel communicated with the circulating flue gas inlet and an outer layer flow channel communicated with the guide gas interface, the inner layer flow channel is provided with a nozzle towards the combustion furnace hearth, and the outer layer flow channel is provided with a spout towards the denitration furnace hearth.

[0007] Further, the double-cavity sleeve comprises an outer shell and an inner shell arranged in the cavity of the outer shell, the inner layer flow channel is a space defined by the inner shell, and the outer layer flow channel is a space defined by the outer shell and the inner shell.

[0008] Further, the guide gas interface comprises a gas inlet and a gas outlet, one end of the outer layer flow channel (1461) is communicated with the gas inlet, and the other end is communicated with the gas outlet.

[0009] Further, the nozzle is arranged through the inner shell and the outer shell, two ends of the inner layer flow channel are communicated with the circulating flue gas inlet, and flue gas in the inner layer flow channel can be sprayed towards the incineration hearth through the nozzle.

[0010] Further, the nozzle is arranged through the inner shell and the outer shell, two ends of the inner layer flow channel are communicated with the circulating flue gas inlet, and flue gas in the inner layer flow channel can be sprayed towards the incineration hearth through the nozzle.

[0011] Further, the inner layer flow channel is in a U shape as a whole, and the inner tube ports at two ends of the inner layer flow channel are arranged through the outer shell.

[0012] Further, the denitration hearth is provided with a secondary air inlet.

[0013] To solve the above technical problems, the utility model also provides a kind of technical scheme, as follows:

[0014] A kind of ammonia-containing waste gas treatment system, including the segmented combustion furnace device of any one described above, and with the flue gas duct of combustion furnace device communication arrangement, the flue gas duct is equipped with heat exchange device and induced draft fan, further include circulating gas supply device, the one end of the circulating supply device is communicated with flue gas duct, the other end is communicated with combustion furnace device by circulating flue gas inlet.

[0015] The utility model embodiment provides a kind of segmented combustion furnace device and ammonia-containing waste gas treatment system, by being arranged between incineration hearth and denitration hearth quenching hearth, multiple double-cavity sleeve pipes being arranged in quenching hearth, and nozzle being arranged towards incineration hearth and nozzle being arranged towards denitration hearth on double-cavity sleeve pipe, can effectively accelerate the convection of reaction gas, so that the reaction gas temperature of ammonia-containing waste gas after incineration treatment in incineration hearth can be rapidly and evenly reduced in quenching hearth, under the effect of convection, reaction gas can be rapidly guided to denitration hearth, improve the SNCR reaction rate and effect in denitration hearth, effectively improve the removal rate of nitrogen oxides, reduce the pollution to environment. BRIEF DESCRIPTION OF DRAWINGS

[0016] One or more embodiments are illustrated by way of example in the figures that form a part of this disclosure and which are illustrative of various embodiments and implementations that can be implemented in view of the teachings provided herein. In the drawings, like reference numerals refer to like elements throughout.

[0017] Figure 1 It is the structure schematic diagram of ammonia-containing waste gas treatment system in the utility model embodiment;

[0018] Figure 2 is a double cavity sleeve structure schematic diagram in a segmented combustion furnace device in the embodiment of the utility model;

[0019] Figure 3 is Figure 2 A-A sectional view in the embodiment of the utility model.

[0020] Mark explanation: 100, combustion furnace device;110, incineration hearth;120, quenching hearth;130, denitration hearth;140, double cavity sleeve;141, outer pipe entrance;142, inner pipe port;143, spray pipe;144, outer pipe exit;145, spout;146, outer shell;1461, outer layer flow channel;1471, inner layer flow channel;147, inner shell;101, ammonia-containing waste gas entrance;102, primary air entrance;103, fuel entrance;104, circulating flue gas entrance;105, secondary air entrance;106, amino reducing agent entrance;107, gas entrance;108, gas exit;200, heat exchange device;300, circulating gas supply device;400, induced draft fan;500, discharge device;600, exhaust flue. Specific embodiments

[0021] In order to make the purpose, technical scheme and advantage of the utility model more clear, the following will be combined with the drawings to the each embodiment of the utility model detailedly. However, the ordinary skilled in the art can understand that in each embodiment of the utility model, in order to make the reader better understanding of the present application and proposed many technical details. However, even without these technical details and based on the various changes and modifications of each embodiment, the technical scheme claimed by each claim of the present application can be realized.

[0022] As Figures 1-3 shown, one embodiment of the utility model relates to a kind of segmented combustion furnace device 100, including the incineration hearth 110 and denitration hearth 130 of intercommunication arrangement, and quenching hearth 120 between incineration hearth 110 and denitration hearth 130, the incineration hearth 110 is equipped with ammonia-containing waste gas entrance 101, primary air entrance 102 and fuel entrance 103, the quenching hearth 120 is equipped with circulating flue gas entrance 104 and flow guide gas interface of intercommunication, the flow guide gas interface includes gas entrance 107 and gas exit 108, the denitration hearth 130 is equipped with amino reducing agent entrance 106, the quenching hearth 120 inside is equipped with multiple double cavity sleeves 140, the double cavity sleeve 140 includes with circulating flue gas entrance 104 intercommunication's inner layer flow channel 1471 and with flow guide gas interface intercommunication's outer layer flow channel 1461.The inner layer flow channel 1471 is equipped with the spray pipe 143 towards incineration hearth 110 of intercommunication, and the outer layer flow channel 1461 is equipped with the spout 145 towards denitration hearth 130 of intercommunication.

[0023] By setting the quenching furnace 120 between the incineration furnace 110 and the denitration furnace 130, setting the plurality of double-cavity sleeves 140 in the quenching furnace 120, and setting the nozzles 143 on the double-cavity sleeves 140 towards the incineration furnace 110 and the outlets 145 towards the denitration furnace, the convection of the reaction gas can be effectively accelerated, so that the temperature of the reaction gas after the incineration treatment of the ammonia-containing waste gas in the incineration furnace 110 can be quickly and uniformly reduced in the quenching furnace 120, the SNCR reaction rate and effect in the denitration furnace 130 are improved, the removal rate of nitrogen oxides is effectively improved, and the pollution to the environment is reduced.

[0024] In one embodiment, a segmented combustion furnace device 100 is involved, which includes an incineration furnace 110 and a denitration furnace 130 connected in communication, and a quenching furnace 120 arranged between the incineration furnace 110 and the denitration furnace 130, wherein the quenching furnace 120 is internally provided with a plurality of double-cavity sleeves 140, the double-cavity sleeve 140 includes an outer shell 146 and an inner shell 147 arranged in the cavity of the outer shell 146, the inner layer flow channel 1471 is a space defined by the inner shell 147, and the outer layer flow channel 1461 is a space defined by the outer shell 146 and the inner shell 147; the quenching furnace 120 is connected in communication with a circulating flue gas inlet 104 and a flow guide gas interface, the flow guide gas interface includes a gas inlet 107 and a gas outlet 108, one end of the outer layer flow channel 1461 is provided with an outer pipe inlet 141 connected in communication with the gas inlet 107, and the other end is provided with an outer pipe outlet 144 connected in communication with the gas outlet 108, so that air can be introduced into the outer layer flow channel 1461 through the flow guide gas interface; the two ends of the inner layer flow channel 1471 are connected in communication with the circulating flue gas inlet 104. In one exemplary example, the nozzle 143 connected in communication with the inner layer flow channel 1471 penetrates the inner shell 147 and the outer shell 146, and the flue gas in the inner layer flow channel 1471 can be injected towards the incineration furnace 110 through the nozzle 143; the outlet 145 connected in communication with the outer layer flow channel 1461 penetrates the outer shell 146, and the air in the outer layer flow channel 1461 can be injected towards the denitration furnace 130 through the outlet 145.

[0025] Through the arrangement of the double-cavity sleeve 140, the inner layer flow channel 1461 is in communication with the circulating flue gas inlet 104, and the flue gas in the inner layer flow channel 1471 is sprayed toward the incineration hearth 110 through the spray pipe 143 to cool the reaction gas, and the outer layer flow channel 1461 sprays air toward the denitration hearth through the spray port to introduce air into the denitration hearth 130 to participate in the denitration reaction. In an exemplary example, the inner layer flow channel 1471 is in the shape of a whole U, and the inner tube port 142 at both ends of the inner layer flow channel 1471 is penetrated in the outer shell 146. Through the arrangement of the opening direction of the spray port 145 being opposite to the opening direction of the spray pipe 143, the cooling of the reaction gas can be effectively realized, and the gas guiding toward the denitration hearth 130 can be realized through the gas convection. The suitable temperature required for the denitration reaction is provided for the denitration hearth 130, and the reaction rate and efficiency of the denitration hearth 130 are improved. Preferably, the denitration hearth 130 is further provided with a secondary air inlet 105, and through the arrangement of the secondary air inlet 105, the denitration reaction conditions in the denitration hearth 130 can be further fine controlled, the SNCR reaction rate and effect are improved, the removal rate of nitrogen oxides is improved, and the pollution to the environment is reduced.

[0026] As Figure 1As shown, one embodiment of the utility model relates to a kind of ammonia-containing waste gas treatment systems, a kind of ammonia-containing waste gas treatment systems, including the combustion furnace device 100 described above, and with the combustion furnace device 100 intercommunication arrangement flue 600, the flue 600 on it is equipped with heat exchange device 200 and induced draft fan 400, still include circulating gas supply device 300, the one end of the circulating supply device is communicated with flue 600, and the other end is communicated with furnace device 100 by circulating flue gas inlet 104.The heat exchange device 200 is preferably waste heat boiler, ammonia-containing waste gas is formed after incineration treatment of combustion furnace device 100, the heat of the flue gas is exchanged after the flue gas is discharged through flue 600, part of flue gas is discharged by induced draft fan 400 to discharge device 500 after cooling, part of flue gas is guided by induced draft fan 400 to circulating gas supply device 300, and is guided to quenching hearth 120 by circulating supply device, preferably, the circulating supply device guides flue gas to quenching hearth 120 by circulating flue gas inlet 104, and cools quenching hearth 120.In ammonia-containing waste gas incineration process, to ensure that ammonia in ammonia-containing waste gas can be fully combusted and decomposed in combustion furnace device 100, reduce ammonia escape, the temperature in incineration hearth 110 needs to be above 1300 DEG C, to ensure subsequent SNCR reaction rate and effect, reaction gas temperature needs to be cooled, by the setting of quenching hearth 120, reaction gas can be rapidly and uniformly cooled, to provide suitable reaction conditions for SNCR, improve SNCR reaction rate and effect, and effectively inhibit the secondary generation of nitrogen oxides by cooling, increase the control accuracy of SNCR reaction, increase the removal rate of nitrogen oxides, and reduce environmental pollution.

[0027] The utility model embodiment provides a kind of segmented combustion furnace device and ammonia-containing waste gas treatment system, by being provided with quenching hearth between incineration hearth and denitration hearth, multiple double-cavity sleeves are arranged in quenching hearth, and the spray pipe towards incineration hearth and the spout towards denitration hearth are arranged on double-cavity sleeve, can effectively accelerate the convection of reaction gas, so that the temperature of reaction gas after incineration treatment of ammonia-containing waste gas in incineration hearth can be rapidly and uniformly reduced in quenching hearth, under the effect of convection, reaction gas can be rapidly guided to denitration hearth, improve SNCR reaction rate and effect in denitration hearth, effectively improve the removal rate of nitrogen oxides, reduce environmental pollution.

[0028] Those skilled in the art can understand that the above embodiments are specific embodiments for implementing the utility model, and in actual application, various changes can be made in form and details without departing from the spirit and scope of the utility model.

Claims

1. A staged combustion furnace apparatus, characterized by, The application relates to a sectional combustion furnace device, which comprises a communicationally arranged incineration furnace (110) and a denitration furnace (130), and a quenching furnace (120) arranged between the incineration furnace (110) and the denitration furnace (130), wherein the incineration furnace (110) is provided with an ammonia-containing waste gas inlet (101), a primary air inlet (102) and a fuel inlet (103), the quenching furnace (120) is communicationally provided with a circulating flue gas inlet (104) and a guide gas interface, the denitration furnace (130) is provided with an amino reducing agent inlet (106), the quenching furnace (120) is internally provided with a plurality of double-cavity sleeves (140), the double-cavity sleeve (140) comprises an inner layer flow channel (1471) in communication with the circulating flue gas inlet (104) and an outer layer flow channel (1461) in communication with the guide gas interface, the inner layer flow channel (1471) is communicationally provided with a nozzle (143) towards the incineration furnace (110), and the outer layer flow channel (1461) is communicationally provided with a spout (145) towards the denitration furnace (130).

2. A furnace apparatus of the segmented combustion type according to claim 1, characterized in that, The double-cavity sleeve (140) comprises an outer shell (146) and an inner shell (147) arranged in the cavity of the outer shell (146), the inner layer flow channel (1471) is a space defined by the inner shell (147), and the outer layer flow channel (1461) is a space defined by the outer shell (146) and the inner shell (147).

3. A furnace apparatus according to claim 2, wherein The guide gas interface comprises a gas inlet (107) and a gas outlet (108), one end of the outer layer flow channel (1461) is in communication with the gas inlet (107), and the other end is in communication with the gas outlet (108).

4. A furnace apparatus according to claim 3, wherein The spout (145) penetrates through the outer shell (146), and the gas in the outer layer flow channel (1461) can be sprayed towards the denitration furnace (130) through the spout (145).

5. A furnace apparatus according to claim 4, wherein The nozzle (143) penetrates through the inner shell (147) and the outer shell (146), both ends of the inner layer flow channel (1471) are in communication with the circulating flue gas inlet (104), and the flue gas in the inner layer flow channel (1471) can be sprayed towards the incineration furnace (110) through the nozzle (143).

6. A furnace apparatus of the segmented combustion type according to claim 5, characterized in that, The inner layer flow channel (1471) is in a whole U shape, and inner tube ports (142) at both ends of the inner layer flow channel (1471) penetrate through the outer shell (146).

7. A furnace arrangement according to any one of claims 1-6, c h a r a c t e r i s e d i n that The denitration furnace (130) is provided with a secondary air inlet (105).

8. An ammonia-containing exhaust gas treatment system, characterized by, The application further relates to a sectional combustion furnace device, which comprises a sectional combustion furnace device as claimed in any one of claims 1-7, and an exhaust gas pipeline (600) in communication with the combustion furnace device (100), wherein the exhaust gas pipeline (600) is provided with a heat exchange device (200) and an induced draft fan (400), and further comprises a circulating gas supply device (300), one end of the circulating gas supply device is in communication with the exhaust gas pipeline (600), and the other end is in communication with the combustion furnace device (100) through the circulating flue gas inlet (104).

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