CN211650278U - High-power surface burner for treating high-concentration organic waste gas - Google Patents
High-power surface burner for treating high-concentration organic waste gas Download PDFInfo
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- CN211650278U CN211650278U CN201921389471.0U CN201921389471U CN211650278U CN 211650278 U CN211650278 U CN 211650278U CN 201921389471 U CN201921389471 U CN 201921389471U CN 211650278 U CN211650278 U CN 211650278U
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Abstract
A high-power surface burner for treating high-concentration organic waste gas comprises a gridded surface burner combination, an organic waste gas valve bank, a combustion-supporting gas valve bank, an air distribution system, an igniter module, an exhaust module and a waste heat recovery module; the gridding surface combustor is combined with an integrated combustor spliced by a segmented metal fiber head and a correspondingly segmented premixing chamber; the organic waste gas valve bank, the combustion-supporting gas valve bank and the air distribution system are respectively connected with a gas mixing chamber of the surface burner, organic waste gas, combustion-supporting gas and air are mixed and then are conveyed to the surface burner for burning, and the igniter module is arranged in a certain area on the upper part of the surface burner; an exhaust module is arranged on the periphery of the gridding surface burner assembly, and a waste heat recovery module is arranged in the exhaust module, so that the organic waste gas is finally discharged up to the standard.
Description
Technical Field
The utility model relates to an organic waste gas administers technical field, especially a high power surface burner of high concentration organic waste gas treatment.
Background
In the production, storage and transportation, loading and unloading links of organic chemicals, organic components can volatilize and enter the atmosphere, and the organic components participate in atmospheric chemical reaction after entering the atmosphere, so that the frequent occurrence of haze is caused. Typical application scenarios are as follows: oil loading and unloading of wharfs, automobiles and trains; and storing the intermediate products and the finished products in the tank area in the production process. Typical components are as follows: crude oil, gasoline, diesel, aviation kerosene, triphenyl, and other volatile components.
The organic waste gas generated in the typical use environment has the characteristics of high concentration, large fluctuation and the like. For the waste gas with large variation, the oil gas recovery process such as adsorption (e.g. CN 102764562A), condensation (e.g. CN 101342427B) and membrane (e.g. CN 204502711U) is mainly used for recovery treatment before. The international mainstream emission standard is in the range of 10g/m3 to 30g/m3, and the oil gas recovery processes have good effects on concentration reduction and emission reduction of high-concentration waste gas. However, with the latest petrochemical standards, such as GB 31570-2015 (emission standard for pollutants for oil refining industry), GB 31571-2015 (emission standard for pollutants for petrochemical industry), and regional local standards, the original emission standards are difficult to apply, and the current mainstream emission standards are all lower than 120mg/m 3.
With the coming of new standards, the original oil gas recovery process (adsorption method, condensation method, membrane method and combined process) gradually shows disadvantages in the aspect of reaching the emission standard due to the limitation of the recovery process and the characteristics of the tail-end adsorbent of the recovery process, and especially for oil products with high content of C2/C3 light components like crude oil and light naphtha, the pure recovery combined process can not reach the latest emission requirement basically.
Based on the latest emission standards, new processes for high concentration oil and gas are gradually starting to be used, such as a combination technology based on condensation recovery and catalytic oxidation, a combination technology based on adsorption absorption and thermal oxidation, or other similar combination technologies combining recovery and incineration.
However, the processes all adopt common processesDue to the combination of the conventional oil gas recovery process (adsorption process, condensation process, membrane process and combined process) and the conventional incineration process (regenerative combustion technology and catalytic combustion technology), the concentration of the tail gas inlet is strictly limited by an incineration system, so that the popularization and application of the combustion technology in the high-concentration waste gas field disclosed by the patent have more limitations. Meanwhile, the existing burners for regenerative combustion and catalytic combustion adopt the problems that fuel gas and air enter a combustion chamber through a combustion head and then are mixed and combusted, the high-temperature retention time of the combustion chamber, the distribution of the flame temperature field is not uniform, the combustion air is not uniformly mixed and the like, so that NO in the flue gas is causedXAnd the discharge of VOCs exceeds standard and other problems occur occasionally.
At present, a novel metal fiber combustor adopts a premixing combustion mode, combustion components and air are fully mixed before combustion, and due to the wide micropore structural characteristics of a fiber layer, the novel metal fiber combustor has a good effect on the aspects of low-nitrogen combustion control and ultralow emission control; meanwhile, the flexible structure of the metal fiber enables the head of the burner to be made into any shape, such as plane, flat, cylinder, cone, concave, corrugated and the like.
However, due to the problems of the metal fiber manufacturing process, when the specific heat value of combustion exceeds 4MWH, the burner is generally made into a cylindrical shape, the heat load of the burner is increased by the length of the cylindrical shape, and the design can realize stable combustion in the stable and low specific load field; however, in the field of high-concentration organic waste gas described in the patent, the waste gas heat value changes frequently, the waste gas air quantity operation range is large, and similar design can cause the combustor to be easily tempered or the service life of the combustor to be greatly reduced. Therefore this patent development a neotype high power surface combustion system who is applicable to high concentration organic waste gas handles to realize the emission up to standard of above-mentioned field's organic waste gas.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high power surface burner of high concentration organic waste gas treatment has characteristics that nimble throughput, nimble waste gas calorific value flux, area are little.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a high-power surface burner for treating high-concentration organic waste gas is characterized by being formed by connecting an organic waste gas valve bank, a combustion-supporting gas valve bank, an air distribution system, a gridding surface burner combination, an igniter module, an exhaust module and a waste heat recovery module, wherein the gridding surface burner combination is an integrated burner spliced by a split metal fiber head and a correspondingly split gas mixing chamber, the metal fiber head is fixed at the tail end of the gas mixing chamber in a metal framework mode, the other side of the gas mixing chamber is respectively connected with the organic waste gas valve bank, the combustion-supporting gas valve bank and an outlet of the air distribution system, gases from three sources are fully mixed in the gas mixing chamber and are fully combusted through the metal fiber head at the tail end of the mixing chamber, the igniter module is arranged in the combustion chamber and is close to a certain area on the upper part of a metal fiber combustion surface of the surface burner, the exhaust module is arranged outside the gridded surface burner, and the waste heat recovery module is arranged inside the exhaust module.
The gridding surface burner combination is based on a burner group formed by independent surface burners, and each surface burner can independently operate.
The number of the independent surface burners is two or more groups.
The independent surface burner is composed of a metal fiber head and a gas mixing chamber, the metal fiber head is fixed at the tail end of the gas mixing chamber in a metal framework mode, an organic waste gas inlet, a combustion-supporting gas inlet and an air gas inlet are formed in the other side of the gas mixing chamber, the three sources of gases are fully mixed in the gas mixing chamber, and the metal fiber head at the tail end of the mixing chamber is used for achieving full combustion.
The organic waste gas is a mixed gas of alkane compounds, nitrogen, air and other inert gases, wherein the concentration range of the alkane compounds is between 0% and the saturated concentration.
The combustion-supporting gas is combustible organic gas such as natural gas, propane gas, fuel gas and the like.
When the system operation load is lower than the design load, one or more groups of independent combustors can be selectively started to realize the flexible operation of the high-power combustor. When only part of the independent burners are opened, the burners which are not operated close the organic waste gas and combustion-supporting gas pipeline valves, and partially open the air inlet valve, and the lowest air speed is maintained, so that the occurrence of burner backfire is avoided. The lowest operation load of the fan needs to maintain the unit wind speed to be larger than a certain value, and generally, the minimum operation load of the fan needs to be larger than the maximum tempering speed of all combustion components.
The metal fiber heads of the independent surface burners are consistent in shape and can be spliced into a whole without a gap in the inner plane, such as a square, a rectangle, a sector, a circle and the like. Preferably a square or fan configuration is used. The spliced plane is square, rectangular or circular.
The high power surface combustion system according to this patent has a design operating load of more than 4MWH, preferably a design operating load of more than 8 MWH. When the operation load is lower than 4MWH, stable operation of the system can be realized by using a single surface combustor.
The high power surface combustion system as described in this patent has a design operating load of no greater than 100MWH, preferably no greater than 80 MWH.
In particular, the high power surface combustion system as described in this patent, when the plane of the metal fiber head after splicing is circular, the design operating load is not more than 60 MWH. When the plane of the metal fiber head after splicing is square, the design operating load is not more than 80 MWH. When the plane of the metal fiber head after splicing is rectangular, the design operating load is not more than 100 MWH.
When the design operating load is greater than 100MWH, multiple sets of high power surface combustion systems are employed to achieve stable operation of the system.
The independent surface burners are respectively provided with independent gas mixing chambers to realize the mixing of waste gas, combustion-supporting gas and air; the organic waste gas valve group, the combustion-supporting gas valve group and the air distribution system are respectively connected with the gas mixing chamber.
The gas mixing chamber is composed of a one-stage mixer or a multi-stage mixer, and the effective mixing of the organic waste gas, the combustion-supporting gas and the air is realized in the gas mixing chamber. The blender adopts one or more combinations of drift diameter straight tube structure, venturi structure, diffuser structure to the optional vortex structure that increases in the mixing section realizes more even gas mixing.
Generally, the three gases of the present invention have the following relationship, and the air volume is larger than the organic waste gas volume and much larger than the combustion-supporting air volume. Correspondingly, the diameter of the air pipeline is larger than that of the organic waste gas pipeline and larger than that of the combustion-supporting gas pipeline.
Therefore, optionally, the three gases are mixed in step in the gas mixing chamber according to the proportional relationship. Namely, the organic waste gas and the combustion-supporting gas are premixed in a first-stage mixing section; the premixed gas mixture is further mixed with air in a secondary mixing section.
Typically, the mixing chamber aspect ratio is greater than 2: 1.
because the organic waste gas described in the patent has the characteristic of high calorific value, the combustion-supporting gas is unnecessary in the operation process. And the combustion-supporting gas supplements the combustion heat value according to the running condition of the combustion chamber.
The organic waste gas valve group and the combustion-supporting gas valve group are respectively arranged at the front ends of the gas mixing chambers of the independent surface combustors, and the flow control and parameter (including temperature, pressure, concentration and the like) monitoring of each gas path are realized.
The organic waste gas realizes flow control and parameter monitoring through an organic waste gas valve bank; the combustion-supporting gas realizes flow control and parameter monitoring through the combustion-supporting gas valve group.
The organic waste gas valve group is provided with an automatic control valve, a flow monitoring instrument, a pressure monitoring instrument, a concentration monitoring instrument, a temperature monitoring instrument, a flame arrester and other facilities. The organic waste gas valve group is directly connected with the gas mixing chamber through a pipeline.
The combustion-supporting gas valve group is provided with an automatic control valve, and can be selectively provided with a pressure monitoring instrument, a flow monitoring instrument, a temperature monitoring instrument, a flame arrester and other facilities. The combustion-supporting gas valve group is directly connected with the gas mixing chamber through a pipeline.
The air realizes flow control and parameter (temperature, flow, pressure and the like) monitoring through an air distribution system. The air quantity of each independent air mixing chamber is controlled by an independent air valve through an independent fan system or a unified fan system to each independent air mixing chamber.
Preferably, the air distribution system is operated by priority of other modules, and is closed finally when the system is stopped. Namely, before the combustion system is ignited, the air distribution system preferentially operates for a certain time, and after the combustion system is closed, the air distribution system continuously operates for a certain time so as to ensure the operation safety of the system.
The high-power combustor system automatically adjusts the on-off and the operation load of the independent combustor based on the total heat value HT of the organic waste gas.
The starting of the independent burner and the automatic adjustment of the system are realized based on the following two optional modes:
the design load of the individual burners is not greater than HD, and the number of the individual burners is N, wherein N > 1. (HD: MWH)
Design load of high power combustor: HT = N XHD. (HT: MWH)
(1) Estimation of the Total heating value HTa (HTa: MWH) of the organic waste gas
The design stage estimates the specific heating value Ha (Ha: MW/m3 organic waste gas) of the oil and gas:
wherein the oil gas contains n organic components, k is the kth component in the oil gas, Hak is the maximum possible heat value of the kth component in 1m3 oil gas, and C0 is the maximum possible concentration in 1m3 oil gas.
The flow rate F (F: m 3/h), concentration C (C: g/m 3) and other parameters of the organic waste gas are monitored.
Calculating the gross calorific value in oil gas: HTa = Ha XFX (C/C0).
In the operation process, the opening number of the independent burners is as follows: n = round (HTa/HD) + 1. N is not more than N.
During operation, the opening number of the independent burners is automatically adjusted according to the flow F of the organic waste gas.
In the operation process, the fluctuation of oil gas components causes the real combustion heat value HTa to deviate from the design value HT, which shows that the combustion temperature of the combustion chamber can not be maintained, and in order to ensure the stable operation of the system, the combustion-supporting gas is properly supplemented to the combustion system so as to maintain the stability of the combustion heat value and ensure the operation load of the system to be within the design range.
(2) Temperature T of combustion chamber
Estimating a combustion temperature TD under a design load condition according to the organic waste gas components under the design condition;
estimating the combustion temperature TDMin of the single independent combustor under the standby condition of other combustors;
setting the upper limit of the temperature of the combustion chamber: ta1, wherein Ta1= TD + T01; t01 is a fixed value from 0 ℃ to 200 ℃.
Lower temperature limit setting of the combustion chamber: ta2, wherein Ta2= TDmin-T02; t02 is a fixed value from 0 ℃ to 200 ℃.
The operating condition of the system is automatically adjusted by monitoring the temperature T of the combustion chamber; in order to realize accurate monitoring of the temperature of the combustion chamber, temperature monitoring T1, T2 and T3 are preferably respectively arranged close to the side of each independent combustor.
When the system is operated at less than full load, Max { T1, T2, T3 … } > Ta1 is started, and the operation load of the system is increased.
When Min { T1, T2, T3 … } > Ta1 or the system runs at full load, the exhaust gas intake valves of the last group of independent combustors are adjusted and even closed, and the running load of the system is reduced.
When Max { T1, T2, T3 … } < Ta1, the air inlet valve of the last group of independent burners is adjusted, and the operation load of the system is reduced.
When Min { T1, T2, T3 … } < Ta2, the air inlet valves of the independent combustors are closed successively, the operation load of the system is reduced, and the temperature of the system can be maintained to be higher than the set lower limit of the temperature; and starting a combustion-supporting gas system of the running independent combustor to maintain the temperature of the corresponding combustion chamber to the design temperature TD.
When Max { T1, T2, T3 … } < Ta2, closing the air inlet valves of all the independent combustors, and opening the combustion-supporting air system until the temperature of the system can be maintained to be higher than the set lower temperature limit; or shut down the system.
The igniter module is a low-power combustor and is arranged in a certain area close to the upper part of the metal fiber combustion surface of the surface combustor in the combustion chamber, and the igniter module realizes the safe and stable starting of the high-power surface combustion system.
The igniter module is one of an injection type gas burner, a gas distribution type gas burner or other small low-power burners. Wherein the ignition mode is a high energy igniter, an inner flame transfer type igniter or other ignition forms.
The igniter module is in a pilot lamp running mode or an intermittent running mode.
The number of the igniter modules is 1 or N. N is the number of independent burners. When the number of igniters is 1, the igniters are arranged in the first ignition independent burner region. When the number of igniters is N, the igniter modules are arranged in each individual burner region.
The igniter module is started before the high-power surface combustion system is started, and after the igniter is monitored normally, the surface combustor sequentially starts the air distribution system, the combustion-supporting gas valve bank and the organic waste gas valve bank. And after the surface burner system operates normally, the igniter module is closed or normally opened.
The exhaust module is composed of a high-exhaust chimney, and the high-exhaust chimney is of a one-section or multi-section structure. The height of the chimney is limited by local regulations, and generally, the height of the chimney is not less than 15 meters.
The exhaust module is arranged at the top of the gridded surface burner and completely wraps the surface burner to form a combustion chamber, and high-temperature over-fire gas is arranged in the combustion chamber.
The exhaust module is externally made of a metal or non-metal structural material, and the lining is made of a high-temperature-resistant heat-insulating material, so that structural material damage or personal injury caused by contact of high-temperature burnout gas and the structural material is avoided.
The waste heat recovery module is arranged inside the exhaust module. The heat in the flue gas can be recycled by selecting coil pipe type, jacket type and tube array type heat exchange. The recovered heat energy is supplied to other units for use in the form of hot water, steam, hot oil and the like.
The utility model has the advantages of as follows: large operation load, flexible system operation, direct treatment of high-concentration organic waste gas and the like.
Drawings
Fig. 1-6 are schematic views of a typical high power surface combustion system.
FIG. 1 is a high power surface burner for high concentration organic waste gas treatment, wherein the number of independent burners is two.
FIG. 2 is a schematic structural diagram of a two-chamber type high power surface combustion system in which the individual burners are square.
FIG. 3 is a schematic view of a two-chamber high power surface combustion system in which the individual burners are semi-circular.
Fig. 4 is a high power surface burner for high concentration organic waste gas treatment, wherein the number of independent burners is four.
FIG. 5 is a schematic structural diagram of a four-chamber type high power surface combustion system, wherein the individual burners are square.
FIG. 6 is a schematic view of a four-chamber high power surface combustion system, wherein the individual burners are fan-shaped.
Fig. 7 and 8 are schematic views of a non-gridding surface burner, wherein the surface burner is a disk.
The reference numbers in figures 1 to 8 represent, respectively:
111/211/311/411 is combustion-supporting gas inlet, 112/212/312/412 is combustion-supporting gas pressure regulating valve, 113/213/313/413 is combustion-supporting gas control valve;
121/221/321/421 is organic waste gas inlet, 122/222/322/422 is organic waste gas regulating valve;
131 is an air inlet, 132 is an air filter, 133 is an air blower, 134/234/334/434 is an air regulating valve;
141/241 is an ignition gas inlet, 142/242 is an ignition gas pressure regulating valve, 143/243 is an ignition gas regulating valve, and 144/244 is an igniter;
151/251/351/451 is a gas mixing chamber, 152/252/352/452 is a turbulence structure in the gas mixing chamber; 153/253/353/453 is the connecting pipe of gas mixing chamber and burner;
161/261/361/461 is a gridded independent burner, 162/262/362/462 is a metal fiber head of the independent burner, 163/263/363/463 is a heat insulating material of the independent burner, and 164 is a burner base;
171 is a high-smoke chimney, 172 is a lining refractory material;
181 is a waste heat recovery medium inlet, and 182 is a waste heat recovery medium outlet;
191 is an automated control system.
The meter, P for pressure monitoring, T for temperature monitoring, F for flow monitoring, C for concentration monitoring, O2 for oxygen content monitoring.
The present invention will be further described with reference to the accompanying drawings, which are not intended as a limiting description of the present invention.
Detailed Description
Detailed description of the preferred embodiment 1
Fig. 1 is a schematic diagram of a high-power surface burner for treating high-concentration organic waste gas, wherein the number of the independent burners is two. Wherein the gridded individual burner structure is shown in figure 2.
The organic waste gas 121, 221 comes from the high concentration organic waste gas volatilized by breathing in the oil tank area, realizes the control of the flow of the organic waste gas through the waste gas control valves 122, 222, and realizes the real-time monitoring of various states of the waste gas through temperature monitoring T, pressure monitoring P and flow monitoring F.
The combustion-supporting gas 111, 211 is natural gas, the control of gas pressure is realized through the reducing valve 112, 212, the adjustment of natural gas flow is realized through the combustion-supporting gas control valve 113, 213, and the real-time monitoring of various states of the natural gas is realized through the pressure monitoring P and the flow monitoring F.
Organic waste gas, combustion-supporting gas and air are fully mixed in gas mixing chambers 151 and 251, wherein the gas mixing chambers are straight pipes, fixed helical blades 152 and 252 are arranged in the gas mixing chambers to enhance gas flow mixing, and the mixed gas is conveyed to a surface combustor through connecting pipes 153 and 253 to destroy organic components in tail gas.
In the present embodiment, the ignition system is provided only in the upper region of the first independent burner. The ignition system is arranged in the upper region of the metal fibers of the first individual burner. The ignition gas 141 is natural gas, the pressure of the ignition gas is controlled through the pressure reducing valve 142, the on-off control of the ignition gas is realized through the ignition gas control valve 143, the ignition and monitoring of the ignition gas are realized through the high-energy ignition device 144, and the real-time monitoring of the state of the ignition gas is realized through the pressure monitoring P.
The mixed gas enters the gridded independent surface burners 161 and 261 to realize the final destruction of the tail gas. An integral burner base 164 is connected to the premix chamber conduits 153, 253, respectively, and has individual burner metal fiber headers 162, 262 mounted on the upper portion of the burner base, respectively, and insulation 163, 263 disposed outside the burner header area to prevent the burner heat from adversely affecting the environment.
The tail gas after combustion is discharged up to the standard through an integrated high-exhaust chimney 171 fixed on the upper part of the gridding independent combustor, wherein the chimney is lined with a heat insulation material 172.
A coil pipe type waste heat recovery device is arranged in the high-exhaust chimney, and the heating medium is heat medium oil. The cold medium oil 181 realizes the heat recovery control through the control valve group, and the heat medium oil 182 is delivered to the heat consumer unit.
The gridded surface burner combination, the organic waste gas valve bank, the combustion-supporting gas valve bank, the air distribution system, the igniter module, the exhaust module and the waste heat recovery module realize automatic control through the editable logic control system 191, and the whole operation system realizes unattended operation.
Wherein the combustion surface of the independent combustor shown in FIG. 2 is square, and the design load of the independent combustor is 5 MWh; the high-power combustor combined into an integral structure is of a rectangular structure, and the maximum design load of the integral high-power surface combustion system is 10 MWh.
As shown in fig. 2, 161 and 261 are independent surface burners, and a metal fiber layer 162/262 is covered on the surface of a square metal structure frame, and the metal structure frame is installed on the combustion head base 164 of the high-power surface combustion system through a certain connection form.
The organic waste gas treatment system of embodiment 1, exhaust emission satisfies the latest national emission standard, and the heat recovery effect is high.
Detailed description of the preferred embodiment 2
Fig. 1 shows a schematic diagram of a high power surface combustion system suitable for exhaust gas treatment, in which the number of independent burners is two. The system configuration and operation flow of example 2 are the same as those of example 1, except that there are differences in the structure of the individual burners, and the gridded individual burner structure in example 2 is shown in fig. 3.
The independent combustion chamber shown in fig. 3 is composed of an integrated burner base 164 and gridded semicircular independent burners 161 and 261, and the combustion surfaces 162 and 262 are semicircular disk-shaped. The integrated high-power burner after combination is disc-shaped.
The design load of the independent combustor is 7.5MWh, and the maximum design load of the integrated high-power surface combustion system is 15 MWh.
The organic waste gas treatment system of example 2, exhaust emission met the latest national emission standards, and the heat recovery load was higher.
Detailed description of preferred embodiments 3
Fig. 4 is a schematic diagram of a high-power surface burner for treating high-concentration organic waste gas, wherein the number of the independent burners is four. Wherein the gridded individual burner structure is shown in figure 5.
The organic waste gas 121, 221, 321, 421 comes from high-concentration organic waste gas generated by loading at an oil product terminal, the flow of the organic waste gas is controlled by the waste gas control valves 122, 222, 322, 422, and each state of the waste gas is monitored in real time by temperature monitoring T, pressure monitoring P, flow monitoring F, concentration monitoring C and oxygen content monitoring O2.
The combustion-supporting gas 111, 211, 311 and 411 is liquefied petroleum gas, the control of gas pressure is realized through the reducing valves 112 and 212, the adjustment of natural gas flow is realized through the combustion-supporting gas control valves 113, 213, 313 and 413, and the real-time monitoring of various states of the natural gas is realized through the pressure monitoring P and the flow monitoring F.
The organic waste gas, the combustion-supporting gas and the air are fully mixed in the gas mixing chambers 151, 251, 351 and 451, wherein the gas mixing chambers are of Venturi tube structures, 152, 252, 352 and 452 are of Venturi tube structures to enhance gas flow mixing, and the mixed gas is conveyed to the surface burner through the connecting pipes 153, 253, 353 and 453 to destroy organic components in the tail gas.
In the present embodiment, ignition systems are disposed in the upper regions of the first independent burner 161 and the third independent burner 361, respectively. The ignition system is arranged in the upper region of the metal fibers of the first and the third independent burners. The ignition gas 141, 341 is natural gas, the pressure of the ignition gas is controlled by the pressure reducing valve 142, 342, the on-off control of the ignition gas is realized by the ignition gas control valve 143, 343, the ignition and monitoring of the ignition gas are realized by the high- energy ignition device 144, 344, and the real-time monitoring of the state of the ignition gas is realized by the pressure monitoring P.
The mixed gas enters the gridded independent surface burners 161, 261, 361 and 461 to realize the final destruction of the tail gas. An integral burner base 164 is connected to the premix chamber conduits 153, 253, 353, 453, respectively, and the upper portion of the burner base is fitted with individual burner metal fiber headers 162, 262, 362, 462, respectively, and insulation 163, 263, 363, 463 is provided outside the burner header area to avoid adverse environmental effects from the burner heat.
The tail gas after combustion is discharged up to the standard through an integrated high-exhaust chimney 171 fixed on the upper part of the gridding independent combustor, wherein the chimney is lined with a heat insulation material 172.
The gridding surface burner combination, the organic waste gas valve bank, the combustion-supporting gas valve bank, the air distribution system, the igniter module, the exhaust module and the waste heat recovery module realize automatic control through the editable logic control system 191, and the whole system realizes unattended operation.
Wherein the combustion surface of the independent combustor shown in fig. 5 is square, and the design load of the independent combustor is 10 MWh; the high-power combustor combined into an integral structure is of a square structure, and the maximum design load of the integral high-power surface combustion system is 40 MWh.
As shown in fig. 5, 161, 261, 361, 461 are independent surface burners, and a metal fiber layer 162/262 is covered on the surface of a square metal structure frame, and the metal structure frame is mounted on a high power burner base 164 through a certain connection form.
The organic waste gas treatment system described in embodiment 3 has high treatment capacity, flexible treatment load operation, and tail gas emission meeting the latest national emission standard.
Detailed description of preferred embodiments 4
Fig. 4 is a schematic diagram of a high power surface combustion system suitable for exhaust gas treatment, in which the number of independent burners is four. The system configuration and operation flow of example 4 are the same as those of example 3, except that there are differences in the structure of the individual burners, and the meshed individual burner structure in example 4 is shown in fig. 6.
The independent combustion chamber shown in fig. 6 is composed of an integrated burner base 164 and grid fan-shaped independent burners 161, 261, 361, 461, and the combustion surface is a fan-shaped plane. The integrated high-power burner after combination is disc-shaped.
The independent burner is formed by covering a metal fiber layer 162/262 on the surface of a fan-shaped metal structural frame, and the metal structural frame is arranged on a high-power burner base 164 through a certain connection form.
The design load of the independent combustor is 7MWh, and the maximum design load of the integrated high-power surface combustion system is 28 MWh.
The organic waste gas treatment system described in example 4 has high treatment capacity, flexible treatment load operation, and tail gas emission meeting the latest national emission standards.
Comparative example 1
Fig. 7 is a schematic diagram of a high power surface combustion system for organic waste gas treatment, wherein the structure of the burner head is shown in fig. 8.
The organic waste gas 121 is a high-concentration organic waste gas, the flow rate of the organic waste gas is controlled by the waste gas control valve 122, and various states of the waste gas are monitored in real time by temperature monitoring T, pressure monitoring P and flow monitoring F.
The combustion-supporting gas 111 is natural gas, the control of gas pressure is realized through the pressure reducing valve 112, the adjustment of natural gas flow is realized through the combustion-supporting gas control valve 113, and the real-time monitoring of various states of the natural gas is realized through pressure monitoring P and flow monitoring F.
The organic waste gas, the combustion-supporting gas and the air are fully mixed in the gas mixing chamber 151, wherein the gas mixing chamber is a straight-through-diameter pipe for mixing, and the mixed gas is conveyed to the surface burner through the connecting pipe 153 to destroy organic components in the tail gas.
The upper region of the burner is provided with an ignition system. The ignition system is arranged in the upper region of the burner metal fibers. The ignition gas 141 is natural gas, the pressure of the ignition gas is controlled through the pressure reducing valve 142, the on-off control of the ignition gas is realized through the ignition gas control valve 143, the ignition and monitoring of the ignition gas are realized through the high-energy ignition device 144, and the real-time monitoring of the state of the ignition gas is realized through the pressure monitoring P.
The mixed gas enters a gridded independent surface burner 161 to realize the final destruction of the tail gas. A burner base 164 is connected to the premix chamber conduit 153, and a separate burner metal fiber head 162 is mounted on top of the burner base, and insulation 163 is provided outside the burner head area to avoid adverse environmental effects from the burner heat.
The gridding surface burner combination, the organic waste gas valve bank, the combustion-supporting gas valve bank, the air distribution system, the igniter module and the exhaust module realize automatic control through the editable logic control system 191, and the whole operation system realizes unattended operation.
The combustion surface of the individual combustion chamber shown in fig. 2 is disk-shaped, and the design load of the combustor is 5 MWh.
As shown in fig. 8, the burner 161 is a cylindrical metal frame covered with a metal fiber layer 162, and the metal frame is mounted on a surface burner head base 164 through a certain connection form.
The organic waste gas treatment system described in comparative example 1 has a limited treatment capacity, and the exhaust emission meets the latest national emission standards.
The parts not related to in the utility model are all the same with the prior art or can be realized by adopting the prior art.
Claims (9)
1. A high-power surface burner for treating high-concentration organic waste gas is characterized by being formed by connecting an organic waste gas valve bank, a combustion-supporting gas valve bank, an air distribution system, a gridding surface burner combination, an igniter module, an exhaust module and a waste heat recovery module, wherein the gridding surface burner combination is an integrated burner spliced by a split metal fiber head and a correspondingly split gas mixing chamber, the metal fiber head is fixed at the tail end of the gas mixing chamber in a metal framework mode, the other side of the gas mixing chamber is respectively connected with the organic waste gas valve bank, the combustion-supporting gas valve bank and an outlet of the air distribution system, gases from three sources are fully mixed in the gas mixing chamber and are fully combusted through the metal fiber head at the tail end of the mixing chamber, the igniter module is arranged in the combustion chamber and is close to a certain area on the upper part of a metal fiber combustion surface of the surface burner, the exhaust module is arranged outside the gridded surface burner, and the waste heat recovery module is arranged inside the exhaust module.
2. The high power surface burner for high concentration organic waste gas treatment according to claim 1, wherein the combination of the gridded surface burners is based on a burner group formed by independent surface burners, each surface burner can be independently operated, and the number of the independent surface burners is two or more groups.
3. The high power surface burner for high concentration organic waste gas treatment of claim 2, wherein the metal fiber heads of the individual surface burners are uniform in shape and can be spliced into a single plane without any gap inside.
4. The high power surface burner for high concentration organic waste gas treatment according to claim 1, wherein the gas mixing chamber is composed of a one-stage mixer or a multi-stage mixer, and the effective mixing of the organic waste gas, the combustion-supporting gas and the air is realized in the gas mixing chamber; the mixer adopts one or more combinations of a drift diameter straight pipe structure, a Venturi structure and a diffusion pipe structure.
5. The high power surface burner for high concentration organic waste gas treatment of claim 1, wherein the high power burner has a design operational load of greater than 4MWH and not greater than 100 MWH; when the design operating load is greater than 100MWH, multiple sets of high power surface combustion systems are employed to achieve stable operation of the system.
6. The high power surface burner for high concentration organic waste gas treatment according to claim 1, wherein the system operation automatically adjusts the on/off and operation load of the individual burner based on the gross calorific value HT of the organic waste gas; the starting of the independent burner and the automatic adjustment of the system are realized based on the following two optional modes: (1) estimating the total heat value HTa (HTa: MWH) of the organic waste gas; (2) the temperature T of the combustion chamber.
7. The high-power surface burner for high-concentration organic waste gas treatment as claimed in claim 1, wherein the organic waste gas valve group and the combustion-supporting gas valve group are respectively arranged at the front end of the gas mixing chamber of each independent surface burner, and the monitoring of the temperature, pressure, concentration and flow parameters of each gas path is realized; the air realizes the monitoring of temperature, pressure, concentration and flow parameters through an air distribution system, passes through an independent air fan system or a unified air fan system to each independent air mixing chamber, and controls the air volume of each independent air mixing chamber through an independent air valve.
8. The high power surface burner for high concentration organic waste gas treatment of claim 1, wherein the igniter module is an injection gas burner, a gas distribution gas burner; the ignition mode is a high-energy igniter and an internal flame-transfer type igniter; the igniter module is in a pilot lamp running mode or an intermittent running mode; the number of the igniter modules is 1 or N; the igniter is arranged in the first ignition individual burner region or in each individual burner region.
9. The high-power surface burner for treating high-concentration organic waste gas according to claim 1, wherein the exhaust module is composed of a high-exhaust chimney, the high-exhaust chimney is of a one-section or multi-section structure, is arranged at the top of the gridded surface burner, and completely wraps the surface burner to form a combustion chamber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921389471.0U CN211650278U (en) | 2019-08-26 | 2019-08-26 | High-power surface burner for treating high-concentration organic waste gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921389471.0U CN211650278U (en) | 2019-08-26 | 2019-08-26 | High-power surface burner for treating high-concentration organic waste gas |
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| CN211650278U true CN211650278U (en) | 2020-10-09 |
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| CN201921389471.0U Active CN211650278U (en) | 2019-08-26 | 2019-08-26 | High-power surface burner for treating high-concentration organic waste gas |
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| Country | Link |
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| CN (1) | CN211650278U (en) |
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2019
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