TW552373B - Superatmospheric combustor for combusting lean concentrations of a burnable gas - Google Patents

Abstract

A superatmospheric combustion apparatus and a method of operating such an apparatus include providing a superatmospheric combustion device having a lean gas chamber, a combustor, a heat recovery section, and an exhaust, feeding lean gas to the lean gas chamber, providing a heat sink/pressure equalization chamber and a preheated air chamber within the combustion device, feeding pressurized ambient air to the heat sink/pressure equalization chamber, feeding preheated air to the preheated air chamber, exchanging heat from the lean gas chamber, the preheated air chamber, and the combustor to the pressurized ambient air in the heat sink/pressure equalization chamber, feeding the lean gas from the lean gas chamber to the combustor, feeding the preheated air from the preheated air chamber to the combustor, and combusting the lean gas and the preheated air in the combustor at superatmospheric pressure.

Description

552373 A7

V. Description of the invention (Related application) This application claims the power of Chinese poetry Dingli z / ㈡ 甲 # and Wu Guo provisional patent application No. 60 / 221,137 on July 27, 2000. Scope of the invention The present invention relates to a method of burning superatmospheric pressure Method and device for diluting gas mixture with dilute gas mixture, and more particularly about a combustion arrangement, which has a thermal radon / pressure equalization chamber to protect the burner from back pressure generated during the combustion process. BACKGROUND OF THE INVENTION U.S. Patent No. 3,229,746 (the '746 patent, the entirety of which is incorporated herein by reference) discloses a heat recovery device and a method suitable for combusting a dilute mixed gas concentration combustible gas. Taking the example as an example, the The patent is for the combustion of lean gas. These non-limiting examples are catalytic cracking gas containing carbon monoxide concentration below 8%. The invention of this patent allows carbon monoxide to ignite stably at a temperature of 1200 ° F to 1500T. After the start, in the case of this number, this temperature can be maintained only by the combustion of carbon monoxide. In other cases, there is a small amount of auxiliary fuel demand to Ignite safely and / or maintain the desired heat recovery. Figure 1 of this application shows the heat recovery device of the '746 patent. In Figure 1, one of the frames designated as a whole by reference number 1 is defined horizontally on the reference surface One of the combustion zone 2 and a heat recovery zone 3. The gas is passed to the combustion zone 2 through the gas chamber 4 and the gas port 6. The air is introduced through the air chamber 7. The air enters the combustion chamber 2 through the air port 8. The auxiliary fuel is supplied The secondary air used for combustion passes through the duct 9 to the combustion chamber. The gas and air pass through the inclined duct 1 3 as shown in the figure (which will be -4- this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 552373

The gas mixture is guided from the gas chamber 4 to one of the gas port 6 and the short air pipe 14). The phase vortexes indicated by arrow directions 丨 and 12 caused by the false element are mixed intermittently. It is provided with an auxiliary burner 16 for initially heating the gas in the combustion zone 2 to a suitable kindling temperature. The refractory material 17 grips the combustion zone 2 to re-radiate heat to the gas therein. With the arrangement shown in Figure 1, a lean gas such as a carbon oxide with a concentration of less than 8% (such as a catalytic cracking gas) is burned. Of course, higher concentrations can burn more easily. One of the outstanding features of the design shown in Figure 1 is that it is measured from the combustion products that it = less than 1% excess oxygen. / 、 And the temperature in the combustion chamber 2 can be easily maintained in the range of 120,000 to 150,000 τ so that the carbon oxide can be burned normally after ignition without the need for auxiliary fuel. The combustion of carbon monoxide in the combustion zone 2 releases heat. Essentially, there is an exothermic system operating in the combustion chamber 2. In a non-essential sense, the combustion zone 2 has been designed so that there is virtually no heat input or heat removal from its surroundings to the combustion zone 2. In particular, the absence of cooling elements (eg :: pipe change) is related to combustion zone 2. &Amp; One end wall 18 is defined by a partition 19. The air port 8 and the gas port 6 pass through the partition plate 19 to define a group of substantially concentric oblique angles in the end wall 18. Figure 丨 shows an exposed 2 brick wall 21 as a channelized element, which passes the combustion gas through a narrow channel u to increase the degree of mixing. The heat recovery zone 3 is defined by the frame i downstream of the combustion zone 2. An appropriate heat recovery device (for example, a steam pipe, a heat radiator, a superheated liquid stream, etc.) must be placed in the heat recovery area 3. ° Frame 1 defines the combustion zone 2-enclosure with end walls and side walls extending at the ends. All the walls are arranged to fire the second light through the refractory material -5- 552373 V. Description of the invention (3) Shot to the combustion zone. The high-temperature gas is transmitted at one end of the frame i, with the gas port 6 and the air bee; phase :, zone and 3 :: 气-之-small enough to come from the enclosure :::: at the highest possible level . ^ No radiant heat is maintained. In addition, as shown in FIG. 1, the heat recovery zone 3 is not exposed to the combustion zone 2 at all. This is the difference between Xi's preparation. The latter is in the form of -heat. Into a water pipe and at:;: = light heat of the burning gas. This internal heat: increases and makes the fire stability and carbon monoxide gas conversion reliable. Low 0 The device shown in Figure 1 usually operates at high temperatures. For example, a typical lean gas is fed to the unit at a temperature of 600 F to 1100 F or higher. Because after combustion, the burned gas leaving the combustion zone must be at 12 Torr. F to just. f or higher temperature range. Figures 2 and 3 The conventional device with insufficient jaw fully avoids overheating of its shell plates. These shell plates pass through a pressurized environment (,, and "cold") air flow to an air chamber. The gas chamber is insulated, and this pressurized ambient air flow is created and contained by the child compartment 1: In this arrangement, the pressurized ambient air is used to burn the lean gas and an auxiliary fuel flow in the device. Source of oxidant Figure 2 shows a conventional combustion element 200, which includes a lean air chamber 212, a burner 230, a heat recovery zone 24o, and an exhaust member 25o. The ambient air is increased by an air pump 220 And feed it to the burner 23 through a supply line 221. The lean gas 210 is fed to the lean gas chamber 212 through a supply line 2 丨 1. _____ -6-

This paper size applies to China National Standard (CNS) A4 specifications (2i (p ^^ iT 552373 A7

Figure 3 shows more details of a combustion element 300. The combustion element 300 includes a lean chamber 312 and a burner 33. The lean gas from the lean gas chamber 312 enters the burner 33 through the second gas port 317. The pressurized ambient air 32o enters the burner 330 through an air port 327. The combustion element 300 is insulated by a refractory lining 300m. The combustion products leave the burner 330 and are sent to a heat recovery section 34o, usually through a heat exchanger (not shown). Those skilled in the art will understand that it may be possible to provide an appropriate number of auxiliary burners 16 (shown in FIG. 1) as a starting mechanism to initially set the burners within 23 (Figure 2) or 330 (Figure 3). The gas is heated to a desired ignition temperature or, as a component, provides a degree of heat input to a desired amount of heat recovery. As mentioned earlier, these devices are most commonly used in processes where lean gas is delivered to the device at a pressure above atmospheric pressure (e.g., 0.1 psig to 5.0 psig or higher), and the burned, After heat recovery (in some cases, the exhaust gas cleaning system is passed) to the atmosphere. However, this will cause burn-in: back pressure. As indicated in Figure 2, air is supplied to the unit by a pump to meet the pressure requirements. Of course, the device is designed to accommodate and withstand these internal pressures. The advantage of the configuration of this device is the economic effect of the pressure containment structure described above, which is due to the integration of the gas chamber and the air chamber in the overall pressure vessel. Because of &, there is only a nominal pressure difference between the compartments. However, it was found that there was a problem in the conventional arrangement shown in FIG. In this embodiment, the ambient air is a refractory lining 2 used to cool the burner 33o: therefore, the lean gas 1:32 and the burner 330 are in contact with the ambient air 32o. Some applications require that the ambient air 320 be preheated before burning. When there is such a request -7-552373 A7 B7 V. Description of the invention (5), the temperature of the ambient air 320 will no longer be sufficient to cool the refractory lining 301. As a result, there are problems with the cooling compartments, resulting in expansion and structural instability of these compartments. Indeed, it was discovered that for process and energy saving reasons, the air supply should be preheated to about 200 ° F to 600 ° F or higher. It was found in these cases that the air chamber capacity as previously defined will no longer provide sufficient cooling to avoid technical problems. Therefore, there is a need to propose an ultra-atmospheric pressure combustion element having an internal thermal upsetting / pressure equalizing chamber. SUMMARY OF THE INVENTION An object of the present invention is to provide a structural advantage of using preheated combustion air while maintaining a minimum pressure difference between each gas chamber and air chamber. Another object of the present invention is to provide an ultra-atmospheric pressure combustion element having an internal hot meal / pressure equalization chamber. Another object of the present invention is to provide such a combustion element for use with preheated combustion air. In one aspect, the present invention proposes a method for operating an ultra-atmospheric combustion element. The method includes providing an ultra-atmospheric combustion element including a lean gas chamber, a burner, a heat recovery section, and an exhaust member, feeding the lean gas to the lean gas chamber, and providing a thermal radon / uniform gas in the combustion element. A pressure chamber and a preheated air chamber, feeding pressurized ambient air to the hot-air / pressure equalizing chamber, feeding preheated air to the preheating air chamber, and drawing from the lean air chamber, preheated air chamber, and The heat exchange of the burner gives the pressurized ambient air in the hot-gas / pressure equalizing chamber, feeds lean air from the lean air chamber to the burner, and feeds preheated air from the preheated air chamber to the burner. , And the lean gas and the preheated air are burned in the burner under superatmospheric conditions. On another point of view, the present invention proposes a super-atmospheric combustion device. The paper size is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) 552373 A7 B7. 5. Description of the invention (6) The atmospheric pressure combustion element has a lean gas chamber, a burner, a heat recovery section, and an exhaust member. A lean gas feed member is used to feed the lean gas to the lean gas chamber, a hot radon / pressure equalizing chamber, and a A preheated air chamber is within the combustion element. A pressurized ambient air feed element is used to feed the pressurized ambient air to the hot slag / pressure equalization chamber. A preheated air feed element is used to feed the preheated air. To the preheated air chamber, a lean air port is used to feed lean gas from the lean air chamber to the burner #, and a preheated air port is used to feed preheated air from the preheated air chamber to the burner. The hot radon / pressure equalization chamber exchanges heat from the lean air chamber, the preheated air chamber, and the burner to the pressurized ambient air in the hot radon / pressure equalization chamber, and the lean and preheated air is in the The burner is simmered under superatmospheric pressure. In the present invention, the pre-heated air chamber may be nested in the hot up / pressure equalization chamber. The present invention comprises pressurizing the ambient air to a pressure of from about 0.1 psig to about 1 0.0 psig, and more preferably from about 0.1 psig to about 5.0 psig. The present invention also includes preheating the preheated air to a temperature of about 200 ° F to about 100 ° F, more preferably a temperature of about 200 ° F to about 600 ° F. The present invention may also include increasing the temperature of the pressurized ambient air leaving the hot radon / pressure equalizing chamber to a temperature not exceeding about 500 ° F, and more preferably a temperature not exceeding about 300 ° F. The invention may also include a heat exchanger in the heat recovery section of the combustion element for pre-heating the preheated air, in this case, a pressurized environmental exchanger. On the other hand, a pre-heated air must be pre-heated using a heat source outside the combustion element. In this case, the pressurized ambient air from the hot radon / pressure equalizing chamber must be discharged and fed to the external heat source. . The above, and other features, objectives, and advantages of the present invention have been read in the following. -9- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) ^^ 2373 A7

The detailed description of the present invention, as shown in the drawings, and the scope of the attached patent application will be made clear by illustration. Brief Description of the Drawings Figure 1 is a cross-sectional elevation view of a conventional heat recovery garment used for combusting the lean gas mixture concentration from M, ", and milk ω < Simplified diagram. The figure is a detailed sectional diagram of an atmospheric combustion element. Figure 4 is a simplified diagram of the ultra-atmospheric combustion element of the present invention. Figure 5 is a detailed sectional diagram of the ultra-atmospheric combustion element of the present invention. Figure 6 is Another embodiment of the present invention is a simplified diagram of the super-atmospheric combustion element. Figure 7 is another embodiment of the invention. Fig. 9 is another diagram of a conventional arrangement in which two combustion elements are operated in parallel. Fig. 10 is a schematic diagram of an ultra-atmospheric combustion element of the present invention according to another embodiment. Fig. 11 is an embodiment of the present invention. A simplified diagram of an atmospheric pressure combustion element. Fig. 12 is a simplified diagram of an ultra-atmospheric pressure combustion element of the present invention according to another embodiment. The same reference numerals are used for the same or matching elements in all the figures. According to the present A simplified diagram of the superatmospheric combustion element 400 of the first embodiment. The combustion element 400 includes a lean chamber 4 12, a burner 430, a heat recovery section 440, a heat exchanger 460 and an exhaust member 450. .The lean gas 410 is fed to the lean gas chamber 412 through a supply line 411. An air pump 420 supplies pressurized feed air to a heat pump / pressure equalization chamber 425 through a supply line 421. Air pump ______- 10- this paper Standards are applicable to Chinese National Standard (CNS) A4 specifications (210 × 297 mm) 552373 A7 B7 V. Description of the invention (8 Chiyou '% ambient air, and the ambient air is at ambient temperature and pressure. 42G air will increase the pressure of ambient air It is about 0 ·] psig to about 1 G.0 psig, and f is preferably about 0. 1 psig to about 5.0 psig. This pressurized air is discharged through a hot radon / equal pressure ", 5, and moved through an official line 455 For example, the purpose of the supply of pressurized air is that the dragon system keeps the metal in the combustion zone 43 cool by providing sufficient thermal insulation effect and flow rate. A relatively small amount of heat is flowing into the hot 壑 / pressure equalizing chamber 425. There is very little difference in the charge air / dish. In fact, we would prefer The temperature of the air in the open / equalizing chamber 425 is not more than 50000, more preferably not more than 300 F. In this way, it is found that the structure of the device is still intact. At this time, at & line 455 The internal warm air is supplied to the heat exchanger 46 and leaves there as the preheated air 465 of the pre-burner 430. The temperature of the preheated air in the line 465 is about 200T to about 1000T, and more preferably about 200. Down to about 600 ° C. The parameters related to the pressurization of the ambient 2 gas, the temperature of the air leaving the hot radon / pressure equalization chamber, and the temperature of the preheated 2 gas for combustion are all implemented in this specification. The examples are consistent. Figure 5 shows tf—an additional detail of the combustion element 500 of the present invention. The combustion element 500 includes a lean gas 1: 5 12 and a burner 530. The gas from the lean chamber 512 is supplied to the burner 530 through a gas port 5 1 7. The pressurized ambient air 52 is supplied under pressure to a heat / pressure equalization chamber 525, and as described above, the pressurized air 521 absorbs some heat from the lean air chamber 512 and the burner 530. The pressurized air exits the hot mash / pressure equalization chamber 525 through an outlet 555 and is sent to a heat exchanger (not shown in the figure). The preheated air from the heat exchanger is supplied to a preheated radon A 5 2 6 through a line 565, and the preheated air is supplied from here to an air port 5 2 7 to | (CNS) A4 size (21GX 297 male

Burner 530. The radon air chamber 526 is insulated to conserve thermal energy and minimize pressure differences. The pre-heating air chamber 526 establishes an intermediate heating air chamber, which is located in the hot-air / equalizing chamber 525 and is cooled by the latter. In each of the embodiments shown in FIGS. 4 to 12, those skilled in the art will understand that although not shown in the figure, an appropriate number of auxiliary burners 16 (shown in FIG. 1) may be provided as a moving mechanism to The gas is initially heated to a desired ignition temperature and / or combustion is maintained when there is an operational variation in the composition or thermal stage of the fuel mixture. In the embodiments shown in Figs. 4 and 5, the heat of the pre-heated air comes from burning 7L pieces 400/500 itself. Fig. 6 shows another embodiment of the present invention, in which the heat of the preheated air is derived from an auxiliary heat source. FIG. 6 shows a combustion element according to another embodiment of the present invention. The combustion element 600 includes a lean chamber 612, a burner 630, a heat recovery section 640, and an exhaust member 650. The lean gas 610 is fed to the lean gas chamber 612 through a line 611. The radon radon is pressurized by an air pump 62 and fed to a hot radon / pressure equalization chamber 625 through a supply line 621. The high-temperature air is discharged from here through a line 674 and heated by a heat source 675 to become preheated air in a line 676 for combustion in the burner 630. The heat source 675 may be any suitable heat source, such as steam or electricity from an external source, thereby saving energy and causing more heat recovery. FIG. 7 shows a combustion element 700 according to another embodiment of the present invention. The combustion element 700 includes a lean chamber 712, a burner 730, a heat recovery section 740, and an exhaust member 750. Lean gas 71〇 is fed to lean gas through a supply line 71〗 ▲ 7 1 2. There are two independent air supply lines in this embodiment. Environmental space

Hold

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552373

The gas is pressurized by an air pump 720 and is supplied to the hot radon / pressure equalization chamber 725 through a supply line 721. The hot air is discharged through a line 777. A pressure controller 778 is provided to control the pressure in the heat up / pressure equalization chamber 725. In this embodiment, the south temperature air is finally discharged into the atmosphere through a line 779. At the same time, an air pump 770 supplies a boosted environment 2 gas to an auxiliary heat source 775 through a line 772. The preheated air in line 776 is then supplied to the burner 73. Figure 8 shows a conventional arrangement in which two combustion elements 800 and 801 operate in parallel. The combustion element 800 includes a lean air chamber 812, a burner 830, a heat recovery section 840, and an exhaust member 850. The lean gas 810 is supplied to the lean gas chamber 8 12 through a supply line 811. The combustion element 80i includes a burner 832 and an exhaust member 852. The fuel 814 is supplied to a burner 832 of the combustion element 801 through a line 815. The ambient moxa is supplied from an air pump 820 to the combustion elements 8A and both. The air pump 820 supplies pressurized air through a line 821, which is branched into supply lines 822 and 823. The supply line 822 supplies combustion air to the burner 830 of the combustion element 800, and the supply line 823 supplies combustion air to the burner 832 of the combustion element. Fig. 9 shows another conventional arrangement, in which the combustion element 900 and the parallel operation are operated. In this embodiment, the combustion element 901 has a heat recovery arrangement to preheat air for itself. The combustion 7L member 900 includes a lean air chamber 912, a burner 930, a heat recovery section 940, and an exhaust member 950. The lean gas 9 10 is fed to the shell gas 912 through a supply line 911. The combustion element 90 includes a burner 932, a heat exchanger 962, and an exhaust member 952. The fuel 914 is fed to the burner 932 through a supply line 9 15. Pressurized ambient air passes from an air pump 920 through a supply line k-scale trees ® α_2ι _ ^^ 552373 A7 _____B7 V. Description of the invention (11) 921 Supply 'The supply line branches into supply lines 922 and 923. The supply line 922 supplies combustion air to the burner 930, and the supply line 923 supplies 2 gas to the heat exchanger 962. Heat exchange is performed in the heat exchanger 962 to provide the preheated air 965 required for the combustion of the burner 932. Fig. 10 shows another embodiment of the present invention applied to two combustion elements 1000 and 1001. The combustion element 1000 includes a lean air chamber 1012, a burner 1030, a heat recovery section 1040, a heat exchanger 1060, and an exhaust member 1050. The lean gas 1010 is supplied to a lean gas chamber 1012 through a supply line 1011. The combustion element 1001 includes a burner 1032 and an exhaust member 1052. The fuel 1014 is supplied to a combustion element 100o through a supply line 10115 for combustion in the burner 1032. A 2 air pump 1020 supplies the pressurized environment it gas through a supply line 1021, which branches into supply lines 1022 and 1023. The supply line 1 0 2 3 supplies the ambient 2 gas to the burner 1 0 3 2. The supply line 102 supplies air to a heat reforming / equalizing chamber 1025. The slightly heated air leaves the hot 壑 / pressure equalization chamber 1025 through a line 1055 and is sent to a heat exchanger 1060. The preheated air leaves the heat exchanger 1060 in a line 1065 and is supplied to the burner 1030. Figure 11 shows an arrangement in which two combustion elements 丨 丨 〇〇 and 丨 丨 丨 operate in parallel. The combustion element 1100 includes a lean air chamber 1112, a burner n30, a heat recovery section 1140, a heat exchanger 116o, and an exhaust member U50. The lean gas 1 1 10 is supplied to the lean gas chamber 丨 丨 丨 2 through a supply line 1 1 11. The combustion element U01 includes a burner 1 132 and an exhaust member 1 152. The fuel 1 Π4 is supplied to the burner 11 3 2 through a line 111 5. An air pump 1 120 supplies pressurized ambient air through a line 1 121 to a heat pump / pressure equalization chamber 1 125. The slightly heated air passes through a pipeline 丨 5 5 leaves the heat -14- This paper size applies to China @ 家 standard (CNS) A4 specifications (⑽x 297 public love) " ---- 552373 A7 __B7 V. Description of the invention ( 12) 壑 / equalizing chamber 1 125 and sent to heat exchanger 1 160. Heat exchanger 1 160 supplies preheated air in lines 1 165 and 1 166. The preheated air in line 1 165 is sent to burner 1 1 3 0. The preheated air in line 1 1 66 is sent to the burner} 32. Fig. 12 shows another embodiment of the invention applied to two combustion elements 200 and 1201 operating in parallel. The combustion element 1200 includes a lean chamber 1 2 1 2. A burner 1230, a heat recovery section 1240, and an exhaust member 1250. The combustion element 1201 includes a burner 1232, a heat exchanger 262, and an exhaust member 1252. The fuel used in the combustion element 1 2 0 1 is supplied to the burner 1232 through a supply line I 2 1 5. The lean gas 1210 used in the combustion of the combustion element 1200 is fed to the gas gas 1212 through a line 1211. An air pump 1220 feeds pressurized ambient air through a supply line 1221 into a hot-gas / pressure equalizing chamber 1225. The slightly heated air from the hot radon / pressure equalization chamber 1225 is sent through a line 1255 to one of the heat X converters 1262 of the combustion element ι20. The preheated air in line 1280 leaves the heat exchanger 1 262. This preheated air is fed to the burner 123 of the combustion element 1200 through a supply line 丨 2 8 and to the burner 232 of the combustion element 1201 through a supply line 1282. In addition to those already mentioned in this specification, the components drawn in the form of outlines or blocks in the drawings are well known to everyone and their internal structure and operation mode are for the implementation or application of the present invention or the present invention. The description of the best mode of invention is irrelevant. Although the preferred embodiments of the present invention have been described above, it should be understood that the present invention is not limited to the above embodiments. On the contrary, the invention is intended to cover each and every method which is within the spirit and scope of the appended claims

552373 A7B7 Fifth invention description (13-style modification and equivalent arrangement. The scope of the following patent application items is interpreted in the broadest sense so as to cover all such modifications and equivalent structures and functions. Industrial Applicability The superatmospheric pressure disclosed in this specification The combustion device and its operation method can be applied to the combustion of a lean mixture of combustible gas. The device includes an ultra-atmospheric pressure combustion element, a lean gas chamber, a burner, a heat recovery section, and an exhaust member, a lean gas. A feed element is used to feed the lean gas to the lean gas chamber, a hot simmer / pressure equalization chamber and a preheated air chamber are within the combustion element, and a pressurized ambient air feed element is used to feed the pressurized ambient air To the hot radon / pressure equalization chamber, a preheated air feed member is used to feed preheated air to the preheated air chamber, and a lean air port is used to feed lean gas from the lean air chamber to the burner. And a pre-heating air port for feeding pre-heated air from the pre-heating air chamber to the burner. The hot 壑 / pressure equalizing chamber enables heat from the lean air chamber, pre-heating air chamber, and burner In exchange for the increase in Ambient air and lean gas to preheat the combustion air superatmospheric conditions within the combustor. This paper -16- applies China National Standard Scale (CNS) A4 size (210 X 297 mm)

Claims (1)

552373 The Intellectual Property Bureau of the Ministry of Economic Affairs's Consumer Cooperative printed six A8 B8 C8 D8 and applied for patent scope 1. A method of operating an ultra-atmospheric combustion element, the method includes: providing an ultra-atmospheric combustion element, which includes a lean gas chamber, a A burner, a heat recovery section, and an exhaust member; sending the lean gas rhyme to the lean gas chamber;衾 The combustion element is provided with a hot air / pressure equalizing chamber and a preheating air chamber; feed the pressurized ambient air to the hot air / pressure equalizing chamber; feed the preheated air to the preheating air chamber;壑 / Equalizing chamber exchanges heat from the lean air chamber, preheated air chamber, and burner to the pressurized ambient air; feeds lean air from the lean air chamber to the burner; and preheats the air from the preheat The air chamber is fed to the combustion chamber; and the lean and preheated air is burned in the burner under superatmospheric conditions. 2. The method according to item 1 of the patent application scope, wherein the preheated air chamber is nested in the hot-gas / pressure equalizing chamber. 3. The method of claim 1 further includes pressurizing the ambient air to a pressure of about 0.1 psig to about 10.0 psig. 4. The method of claim 3, wherein the ambient air is pressurized to a pressure of about 0.1 p s i g to about 5.0 p s i g. 5. The method according to item 1 of the patent application scope, which further comprises preheating the preheated air to a temperature of about 200T to about 1000T. 6. The method of claim 5 in which the pre-heated air is pre-heated to a temperature of about 200 ° F to about 600 ° F. 7. The method according to item 1 of the scope of patent application, wherein the heat exchange step includes making -17- the paper size applicable to the Chinese National Standard (CNtS) a4 specification (210 X 297 mm -------- I— —0K -------- 1 Ding --------- (Please read the precautions on the back before filling out this page) 552373 A8 B8 C8 D8 The scope of patent application leaves the hot 壑 / pressure equalization room The temperature of the pressurized ambient air is raised to a temperature not exceeding 500T printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 8. If the method of the scope of patent application item 1, the heat exchange step includes leaving the heat The temperature of the pressurized ambient air in the pressure chamber is increased to a temperature not exceeding 300 T. 9. If the method of the scope of patent application No. 1 further includes using a heat exchanger in the heat recovery section of the combustion element to preheat and preheat 10. The method according to item 9 of the scope of patent application, which further includes discharging pressurized ambient air from the heat # / average exhibition room and drilling the exhausted air to the heat exchanger CU. The method of item 'It further includes using a heat source to prevent The pre-heated air is heated first. The method of item " of the scope of the patent application, which further includes from the heat / pressure equalization to the discharge of the pressurized ambient air and feeding the discharged air to the external heat source 0 13 · — An ultra-atmospheric combustion device includes: an ultra-atmospheric combustion element including a lean-gas chamber heat recovery section and an exhaust member; a lean-gas feed member for feeding lean gas to the lean-gas chamber In order to check the r / pressure equalization chamber and a pre-empty air chamber. _ • ", two holes, one of them is a pressurized ambient air feed element in the combustion element of the child, and the center is used to the heat 1 / mean I chamber. ; ", Using the last known day of the day to send air to the environment-pre-heated air feed parts, which is used to feed pre-heated air to the burner to the pre-18-this paper size suitable for financial affairs ⑽χ 297? F ( (Please read the notes on the back before filling out this page) Printed clothing hot air chamber for employees' cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs; ~ lean gas port, which uses the lean gas chamber to feed lean gas to the burner; and a preheating 2 gas port, which uses the preheated air The chamber feeds preheated air to the burner; wherein the hot radon / pressure equalization chamber exchanges heat from the lean air chamber, the preheated air chamber and the burner to the pressurized ambient air in the hot radon / pressure equalization chamber, And lean air and preheated air are burned in the burner under superatmospheric conditions. 4. The device according to item i 3 of the scope of patent application, wherein the preheated air chamber is nested in the thermal conditioning / pressure equalization chamber. 15. The device according to item 13 of the patent application scope, further comprising an air pump for pressurizing the environment 2 gas to a pressure of about 0.1 lpSig to about 100 pSig. 16. The device as claimed in claim 15 wherein the ambient air is pressurized to a pressure of about 0.1 psig to about 5.0 psig. 17. The device according to item 13 of the patent application scope, further comprising a preheater for preheating the preheated air to a temperature of about 200 ° F to about 1000T. 18. The device of claim 17 in which the pre-heated air is pre-heated to a temperature of about 200T to about 600T. 19. The device as claimed in item 13 of the patent application, wherein the thermal pressure / pressure equalization increases the temperature of the pressurized ambient air leaving the thermal pressure / pressure equalization chamber to a temperature not exceeding about 500 ° F. 20. The device according to item 3 of the scope of patent application, wherein the hot mash / pressure equalization chamber raises the temperature of the pressurized ambient air leaving the hot ray / pressure equalization chamber to a temperature exceeding 300 ° F. --------------------- Order --------- line (Please read the precautions on the back before filling this page) -19- 552373 A8 B8 C8 D8 6. Application for Patent Scope 21. The device according to item 13 of the patent application scope further includes a heat exchanger for preheating the preheated air in the heat recovery section of the combustion element. 22. The device according to item 21 of the scope of patent application, further comprising a bleeder for discharging pressurized ambient air from the hot mash / pressure equalizing chamber and a feed member for feeding the discharged air to the heat exchanger. 23. The device according to item 13 of the patent application scope, further comprising a heat source outside the combustion element for pre-heating the preheated air. 24. The device according to item 23 of the patent application scope, further comprising a bleeder for discharging pressurized ambient air from the thermal I / pressure equalizing chamber and a feed member for feeding the discharged air to the heat exchanger. (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -20- The paper wattage is applicable to China National Standard (CNS) A4 (210 X 297