A boiler flue gas treatment structure and double steam boiler

Abstract

The present invention discloses a boiler flue gas treatment structure and a double steam boiler, which relates to industrial boiler auxiliary equipment technology, including a flue gas intake pipe, a pH leveling device and a vortex tube, wherein an acid-base impurity removal device is arranged on the left side of the pH leveling device, the flue gas intake pipe is connected to the air inlet of the acid-base impurity removal device, the acid-base impurity removal device is connected to the pH leveling device through a first connecting pipe, the pH leveling device is connected to the vortex tube through a second connecting pipe, the vortex tube cold air port is connected to the acid-base impurity removal device through a cooling pipe, and also includes a second outer shell and a combustion pipe, a collection box is fixedly arranged at the rear side of the second outer shell, and water inlet pipes are fixedly arranged on the top of both sides of the second outer shell. The present invention removes impurities from the high-temperature boiler flue gas through the acid-base impurity removal device, and the vortex tube separates the neutral gas, one stream is a cold air flow and the other stream is a hot air flow, and the cold air flow is transported to the acid-base impurity removal device through the cooling pipe to cool the acid-base impurity removal device.

Description

Technical Field

[0001] The invention relates to the technical field of industrial boiler auxiliary equipment, in particular to a boiler flue gas treatment structure and a double steam boiler. Background Art

[0002] Boiler flue gas treatment refers to the technical process of effectively controlling and cleaning the pollutants in the flue gas generated after boiler combustion. The main pollutants include harmful substances such as sulfur dioxide, nitrogen oxides, and particulate matter. Through flue gas desulfurization, denitrification, dust removal, dehydration and other technical means, the emission concentration of these pollutants can be effectively reduced to meet environmental protection standards and protect the atmospheric environment. Flue gas treatment technology selects appropriate treatment methods according to different pollutant characteristics and emission limits, such as wet limestone desulfurization, SCR denitrification, electrostatic dust removal, etc., and often needs to be used in combination to achieve better cleaning effects. These technologies not only help reduce air pollution, but also improve energy utilization efficiency and the operating stability of boiler equipment. They are one of the important environmental protection measures in industrial production.

[0003] Currently, there are very few companies that utilize boiler flue gas. They only treat the boiler flue gas harmlessly, but the heat energy in the boiler flue gas cannot be fully utilized. Therefore, a treatment device for efficiently utilizing boiler flue gas is needed.

[0004] The invention with authorization announcement number CN109173458B discloses a flue gas treatment device for an industrial boiler. The invention removes dust from the flue gas through a dust treatment device. By utilizing the Seebeck effect theory, in a loop composed of two high-temperature metal plates and a low-temperature metal plate at the low-temperature end, the thermal energy of the high-temperature flue gas in the boiler is converted into electrical energy to power the local power units of the device, thereby achieving the purpose of energy saving, environmental protection and emission reduction.

[0005] The above-mentioned device can achieve the purpose of generating electricity by utilizing temperature difference, but the low temperature end of the device is cooled by a refrigerator, which requires additional energy for power supply, and the device is not provided with a component for cooling the impurity removal device. The impurity removal efficiency of the boiler flue gas with a higher temperature is low, and the boiler flue gas cannot be efficiently removed. Therefore, a device for efficient impurity removal and heat energy recycling of boiler flue gas is needed. Summary of the invention

[0006] The object of the present invention is to provide a boiler flue gas treatment structure and a double steam boiler to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A boiler flue gas treatment structure comprises a flue gas inlet pipe, a pH leveling device and a vortex tube, wherein an acid-base impurity removal device is arranged on the left side of the pH leveling device, the flue gas inlet pipe is connected to the air inlet of the acid-base impurity removal device, the acid-base impurity removal device is connected to the pH leveling device via a first connecting pipe, the pH leveling device is connected to the vortex tube via a second connecting pipe, the cold air port of the vortex tube is connected to the acid-base impurity removal device via a cooling pipe, the high-temperature boiler flue gas is impurity-removed via the acid-base impurity removal device, the pH leveling device adjusts the impurity-removed flue gas into neutral gas, the vortex tube separates the neutral gas into a cold air flow and a hot air flow, the cold air flow is transported to the acid-base impurity removal device via the cooling pipe, and the acid-base impurity removal device is cooled.

[0009] As a further solution of the present invention: a first venturi tube is fixedly provided on the flue gas inlet pipe, a second venturi tube is fixedly provided on the first connecting pipe, a third venturi tube is fixedly provided on the second connecting pipe, and a fifth venturi tube is fixedly provided on the cooling pipe.

[0010] As a further solution of the present invention: a blower is fixedly arranged on the rear side of the vortex tube, and the second connecting tube is connected to the blower through a blower pipe.

[0011] As a further solution of the present invention: the hot air outlet of the vortex tube is fixedly provided with a fourth venturi tube, the outlet of the fourth venturi tube is fixedly provided with a reflux heating tube, and the outlet of the reflux heating tube is fixedly provided with a second exhaust pipe.

[0012] As a further solution of the present invention: a power generation cold end is fixedly arranged in the cold air outlet of the vortex tube, a power generation hot end is fixedly arranged in the hot air outlet of the vortex tube, the power generation cold end is connected to the power generation hot end through a first power generation wire and the first power generation wire is located between the blower and the vortex tube, a battery is fixedly arranged on the front side of the vortex tube, the battery, the power generation cold end and the power generation hot end are connected through a second power generation wire, an inverter is fixedly arranged on the right side of the battery, and the blower is connected to the inverter through a power transmission wire, the material of the first power generation wire is preferably constantan, and the material of the second power generation wire is preferably copper.

[0013] As a further solution of the present invention: the acid-base impurity removal device includes a first outer shell, the internal space of the first outer shell is divided into a cooling space, an acidic impurity removal space and an alkaline impurity removal space by two first partitions, the acidic impurity removal space and the alkaline impurity removal space are connected by two symmetrically arranged ventilation pipes, the ventilation pipe extends below the liquid level and is provided with a plurality of air holes, an air guide pipe is provided in the acidic impurity removal space and one end of the air guide pipe is connected to the first venturi, the other end of the air guide pipe extends below the liquid level and is provided with a plurality of air holes, a first exhaust pipe is provided above the cooling space and passes through the side wall of the first outer shell, and two spray devices are symmetrically provided above the first outer shell.

[0014] As a further solution of the present invention: the spray device includes a water pump and a spray pipe, the water pump feed port is provided with a liquid extraction pipe, and the liquid extraction pipe passes through the top wall of the first outer shell and extends below the liquid level in the first outer shell, and the water pump discharge port is connected to the spray pipe through the liquid outlet pipe.

[0015] As a further solution of the present invention: the height of the feed port of the ventilation pipe is higher than the height of the spray pipe.

[0016] A double steam boiler comprises the boiler flue gas treatment structure as described above, and also comprises a second outer shell and a combustion pipe. The internal space of the second outer shell is divided into a combustion space, a first steam generating space and a second steam generating space by two second partitions. The combustion pipe is connected to the combustion space by a first heating pipe. A collecting box is fixedly arranged on the rear side of the second outer shell, and the collecting box is connected to the combustion space by a plurality of second heating pipes. Water inlet pipes are fixedly arranged on the top of both sides of the second outer shell, and a water inlet valve is arranged on the water inlet pipe. A drain pipe is relatively arranged on the bottom of the front end surface of the second outer shell, and a drain valve is arranged on the drain pipe. A steam pipe is arranged above the drain valve. The air inlet of the flue gas inlet pipe is connected to the collecting box, the reflux heating pipe is extended in the second steam generating space, and the second exhaust pipe passes through the top plate of the second outer shell and extends to the outside of the second outer shell.

[0017] As a further solution of the present invention: the reflux heating tube is vertically arranged in multiple layers.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The high-temperature and high-pressure boiler flue gas in the flue gas inlet pipe is converted into high-temperature and low-pressure boiler flue gas through the first Venturi tube, the flow rate of the boiler flue gas is reduced, and the efficiency of the acid-base impurity removal device for removing impurities from the boiler flue gas is improved. The second and third Venturi tubes accelerate the treatment of the boiler flue gas after impurities removal, which is convenient for the vortex tube to separate and treat the boiler flue gas after impurities removal, thereby improving the cooling and heating efficiency of the vortex tube;

[0020] 2. The blower provides wind power for the second connecting pipe, which accelerates and pressurizes the flue gas in the second connecting pipe, improves the cooling and heating efficiency of the vortex tube, and the reflux heating tube provides heat to other steam boilers;

[0021] 3. The vortex tube provides a stable cold and heat source for the cold end and hot end of the power generation, which can stably provide power to the battery and thus efficiently utilize the boiler flue gas;

[0022] 4. The cold air flow is transported to the cooling space through the vortex tube. The cold air flow passes through the first baffle to cool down the liquid in the acidic impurity removal space and the alkaline impurity removal space (the high-temperature and high-pressure boiler flue gas will also release heat during impurity removal, and the high temperature is not conducive to the impurity removal reaction, so it needs to be cooled down), thereby improving the efficiency of boiler flue gas impurity removal;

[0023] 5. The boiler flue gas is treated with primary impurities through the air guide pipe and the air exchange pipe located below the liquid surface. The spray pipe converts the acid and alkali liquid into spray, so that it can be treated with the boiler flue gas after the primary impurities removal for secondary impurities removal, thereby improving the impurity removal efficiency of the boiler flue gas;

[0024] 6. The high-temperature and high-pressure boiler flue gas is fed to the first heating tube through the combustion tube. The first heating tube heats the water in the first steam generating space, and then feeds it to the combustion space for secondary combustion. The water in the first steam generating space and the second steam generating space is secondary heated through the second partition. The water in the first steam generating space is thirdly heated by a plurality of second heating tubes. The collecting box collects the flue gas from a plurality of second heating tubes to facilitate feeding to the flue gas inlet pipe. The reflux heating tube heats the water in the second steam generating space. The steam generated in the first steam generating space and the second steam generating space is fed to the outside through the steam pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of Example 1 of the present invention.

[0026] Figure 2 It is a schematic diagram of the top structure of embodiment 1 of the present invention.

[0027] Figure 3 This is a schematic diagram of the main structure of Example 1 of the present invention.

[0028] Figure 4 Embodiment 1 of the present invention Figure 2 Schematic diagram of the cross-sectional structure at BB in the middle.

[0029] Figure 5 Embodiment 1 of the present invention Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0030] Figure 6 It is a schematic diagram of the local three-dimensional structure of the acid-base impurity removal device in Example 1 of the present invention.

[0031] Figure 7 It is a schematic diagram of the local three-dimensional structure of the pH leveling device in Example 1 of the present invention.

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of Example 2 of the present invention.

[0033] Fig. 9It is a schematic diagram of the top view of the structure of embodiment 2 of the present invention.

[0034] Fig.10 It is a schematic diagram of a local three-dimensional structure of Example 2 of the present invention.

[0035] Fig.11 Embodiment 2 of the present invention Fig. 9 Schematic diagram of the cross-sectional structure at CC in the middle.

[0036] Notes on reference numerals: 1. flue gas inlet pipe; 2. acid-base impurity removal device; 21. first outer shell; 22. air guide pipe; 23. first partition; 24. ventilation pipe; 25. cooling space; 26. acid impurity removal space; 27. alkaline impurity removal space; 28. spray device; 281. liquid extraction pipe; 282. water pump; 283. liquid outlet pipe; 284. spray pipe; 3. first connecting pipe; 4. pH leveling device; 5. second connecting pipe; 6. blast pipe; 7. blower; 8. vortex tube; 81. first power generation conductor; 82. second power generation conductor; 83. power generation cold end; 84. power generation hot end; 9. cooling pipe; 10 , reflux heating tube; 11, battery; 12, inverter; 121, power transmission wire; 13, first exhaust pipe; 14, second exhaust pipe; 15, first venturi tube; 16, second venturi tube; 17, third venturi tube; 18, fourth venturi tube; 19, fifth venturi tube; 30, second outer shell; 31, drain pipe; 32, drain valve; 33, steam pipe; 34, water inlet pipe; 35, water inlet valve; 36, collecting box; 37, combustion tube; 38, first heating tube; 39, second heating tube; 40, combustion space; 41, first steam generating space; 42, second steam generating space; 43, second partition. DETAILED DESCRIPTION

[0037] The following embodiments will be described in detail with reference to the accompanying drawings. In the drawings or descriptions, similar or identical parts use the same reference numerals, and in actual applications, the shape, thickness or height of each component may be enlarged or reduced. The embodiments listed in the present invention are only used to illustrate the present invention and are not used to limit the scope of the present invention. Any obvious modifications or changes made to the present invention do not depart from the spirit and scope of the present invention.

[0038] Example 1, please refer to Figures 1 to 7In an embodiment of the present invention, a boiler flue gas treatment structure includes a flue gas intake pipe 1, a pH leveling device 4 and a vortex tube 8, an acid-base impurity removal device 2 is arranged on the left side of the pH leveling device 4, the flue gas intake pipe 1 is connected to the air inlet of the acid-base impurity removal device 2, a first venturi tube 15 is fixedly arranged on the flue gas intake pipe 1, the acid-base impurity removal device 2 is connected to the pH leveling device 4 through a first connecting pipe 3, a second venturi tube 16 is fixedly arranged on the first connecting pipe 3, the pH leveling device 4 is connected to the vortex tube 8 through a second connecting pipe 5, a third venturi tube 17 is fixedly arranged on the second connecting pipe 5, the cold air outlet of the vortex tube 8 is connected to the acid-base impurity removal device 2 through a cooling pipe 9, a fifth venturi tube 19 is fixedly arranged on the cooling pipe 9, The alkali impurity removal device 2 removes impurities from the high-temperature boiler flue gas, the pH leveling device 4 adjusts the impurity-removed flue gas to a neutral gas, the vortex tube 8 separates the neutral gas into a cold gas flow and a hot gas flow, and the cold gas flow is transported to the acid-base impurity removal device 2 through the cooling pipe 9, and the acid-base impurity removal device 2 is cooled to efficiently remove impurities from the boiler flue gas. The high-temperature and high-pressure boiler flue gas in the flue gas inlet pipe 1 is converted into a high-temperature and low-pressure boiler flue gas through the first Venturi tube 15, and the flow rate of the boiler flue gas is reduced, thereby improving the impurity removal efficiency of the boiler flue gas by the acid-base impurity removal device 2. The second Venturi tube 16 and the third Venturi tube 17 accelerate the treatment of the impurity-removed boiler flue gas, which is convenient for the vortex tube 8 to separate the impurity-removed boiler flue gas and improve the cooling and heating efficiency of the vortex tube 8.

[0039] A blower 7 is fixedly arranged on the rear side of the vortex tube 8, and the second connecting pipe 5 is connected to the blower 7 through the blast pipe 6. A fourth venturi tube 18 is fixedly arranged at the hot air outlet of the vortex tube 8, and a reflux heating pipe 10 is fixedly arranged at the outlet of the fourth venturi tube 18. A second exhaust pipe 14 is fixedly arranged at the outlet of the reflux heating pipe 10. The blower 7 provides wind force for the second connecting pipe 5, which accelerates and pressurizes the flue gas in the second connecting pipe 5, thereby improving the cooling and heating efficiency of the vortex tube 8, and the reflux heating pipe 10 supplies heat to other steam boilers.

[0040] A power generation cold end 83 is fixedly arranged in the cold air outlet of the vortex tube 8, and a power generation hot end 84 is fixedly arranged in the hot air outlet of the vortex tube 8. The power generation cold end 83 is connected to the power generation hot end 84 through a first power generation wire 81, and the first power generation wire 81 is located between the blower 7 and the vortex tube 8. A battery 11 is fixedly arranged on the front side of the vortex tube 8, and the battery 11, the power generation cold end 83 and the power generation hot end 84 are connected through a second power generation wire 82. The material of the first power generation wire 81 is preferably constantan, and the material of the second power generation wire 82 is preferably copper (Compton effect is one of the thermoelectric effects. When two different materials form a temperature at the contact point, the temperature of the power generation cold end 83 is 0.15 W). When there is a difference, an electric potential difference will be generated between the materials, thereby causing the phenomenon of current flow. Specifically, if two materials with different conductive properties form a closed loop and different temperatures are formed at both ends, then due to the migration of electrons between the two materials, an electromotive force will be generated, causing the electrons to flow, that is, generating current). An inverter 12 is fixedly arranged on the right side of the battery 11, and the blower 7 is connected to the inverter 12 through the power transmission wire 121. The vortex tube 8 provides a stable cold and heat source for the power generation cold end 83 and the power generation hot end 84, which can stably provide power to the battery 11, thereby efficiently utilizing the boiler flue gas.

[0041] The acid-base impurity removal device 2 includes a first outer shell 21, the inner space of the first outer shell 21 is divided into a cooling space 25, an acid impurity removal space 26 and an alkaline impurity removal space 27 by two first partitions 23, the acid impurity removal space 26 and the alkaline impurity removal space 27 are connected by two symmetrically arranged ventilation pipes 24, the ventilation pipe 24 extends below the liquid level and is provided with a plurality of air holes, an air guide pipe 22 is provided in the acid impurity removal space 26, one end of the air guide pipe 22 is connected to the first venturi 15, and the other end of the air guide pipe 22 extends to the first venturi 15. The cooling space 25 is provided with a first exhaust pipe 13 which penetrates the side wall of the first outer shell 21 above the cooling space 25. Two spray devices 28 are symmetrically arranged above the first outer shell 21. The cold air flow is transported to the cooling space 25 through the vortex tube 8. The cold air flow passes through the first partition plate 23 to cool the liquid in the acidic impurity removal space 26 and the alkaline impurity removal space 27 (the high-temperature and high-pressure boiler flue gas will also release heat during impurity removal, and the high temperature is not conducive to the impurity removal reaction, so cooling treatment is required), thereby improving the efficiency of impurity removal of the boiler flue gas.

[0042] The spray device 28 includes a water pump 282 and a spray pipe 284. The feed port of the water pump 282 is provided with a liquid extraction pipe 281, and the liquid extraction pipe 281 passes through the top wall of the first outer shell 21 and extends below the liquid level in the first outer shell 21. The discharge port of the water pump 282 is connected to the spray pipe 284 through a liquid outlet pipe 283. The feed port of the ventilation pipe 24 is higher than the height of the spray pipe 284. The boiler flue gas is subjected to a primary impurity removal treatment through the air guide pipe 22 and the ventilation pipe 24 located below the liquid level. The spray pipe 284 converts the acid and alkali liquid into a spray, so that it undergoes a secondary impurity removal treatment with the boiler flue gas after the primary impurity removal, thereby improving the impurity removal efficiency of the boiler flue gas.

[0043] When the device is in use, the high-temperature and high-pressure boiler flue gas enters from the flue gas inlet pipe 1, and the first venturi tube 15 converts the high-temperature and high-pressure boiler flue gas into high-temperature and low-pressure flue gas, and feeds it to the acid impurity removal space 26 through the air guide pipe 22, and starts the water pump 282. The acid impurity removal liquid in the acid impurity removal space 26 performs the initial acid impurity removal on the high-temperature and low-pressure boiler flue gas, and the spray device 28 performs the secondary acid impurity removal on the boiler flue gas after the preliminary impurity removal, and then feeds it to the alkaline impurity removal space 27 through the ventilation pipe 24, and the alkaline impurity removal liquid in the alkaline impurity removal space 27 performs the initial alkaline impurity removal on the boiler flue gas. The spray device 28 performs secondary alkaline impurity removal on the boiler flue gas after the preliminary impurity removal, and then feeds it to the pH leveling device 4 through the first connecting pipe 3. The pH leveling device 4 performs leveling treatment on the pH of the boiler flue gas. The blower 7 is started, and the boiler flue gas and the outside air are fed to the vortex tube 8 through the second connecting pipe 5 and the blast pipe 6 (the gas temperature at the feed port of the vortex tube 8 must be controlled, and the gas with a higher temperature is not conducive to fully exerting the separation effect of the vortex tube 8). The boiler flue gas and the outside air are separated into hot air flow and cold air flow through the vortex tube 8. The hot air flows through the fourth The venturi tube 18 feeds the material to the reflux heating tube 10, and then discharges it from the second exhaust pipe 14. The cold air flows through the fifth venturi tube 19 and the cooling pipe 9 to feed the material to the cooling space 25. The cold air cools the liquid in the acid impurity removal space 26 and the alkaline impurity removal space 27, and then discharges it from the first exhaust pipe 13. At the same time, the cold air flow in the vortex tube 8 cools the power generation cold end 83, and the hot air flow in the vortex tube 8 heats the power generation hot end 84, so that a large temperature difference is generated between the power generation cold end 83 and the power generation hot end 84, and the Compton effect (Compton effect) is used. It is one of the thermoelectric effects. When a temperature difference is formed at the contact point of two different materials, an electric potential difference will be generated between the materials, thereby causing the flow of current. Specifically, if two materials with different conductivity form a closed loop and different temperatures are formed at both ends, an electromotive force will be generated due to the migration of electrons between the two materials, causing the flow of electrons, that is, generating current), and then charging the battery 11. After the battery 11 is fully charged, it supplies power to the blower 7 through the inverter 12, so as to achieve the purpose of efficient utilization of boiler flue gas.

[0044] Example 2, please refer to Figures 8 to 11 , a double steam boiler, comprising a second outer shell 30 and a combustion pipe 37, the inner space of the second outer shell 30 is divided into a combustion space 40, a first steam generating space 41 and a second steam generating space 42 by two second partitions 43, the combustion pipe 37 is connected to the combustion space 40 by a first heating pipe 38, a manifold 36 is fixedly arranged on the rear side of the second outer shell 30, the air inlet of the flue gas inlet pipe 1 is connected to the manifold 36, and the manifold 36 is connected to the combustion space 40 by a plurality of second heating pipes 39, water inlet pipes 34 are fixedly arranged on the top of both sides of the second outer shell 30, a water inlet valve 35 is arranged on the water inlet pipe 34, a drain pipe 31 is arranged on the bottom of the front end surface of the second outer shell 30, a drain valve 32 is arranged on the drain pipe 31, and a steam pipe 33 is arranged above the drain valve 32; it also includes the boiler flue gas treatment structure of embodiment 1, the reflux heating pipe 10 is extended and arranged in the second steam generating space 42, the reflux heating pipe 10 is vertically arranged in multiple layers, and a second exhaust pipe 14 is fixedly arranged at the air outlet of the reflux heating pipe 10, and the second exhaust pipe 14 passes through the top plate of the second outer shell 30 and extends to the outside of the second outer shell 30, and the high-temperature and high-pressure boiler flue gas is fed to the first heating pipe 38 through the combustion pipe 37. The first heating pipe 38 heats the water in the first steam generating space 41, and then feeds it to the combustion space 40 for secondary combustion, and the water in the first steam generating space 41 and the second steam generating space 42 is secondary heated through the second partition plate 43. A plurality of second heating pipes 39 heat the water in the first steam generating space 41 for the third time, and the collecting box 36 collects the flue gas of a plurality of second heating pipes 39 for easy feeding to the flue gas inlet pipe 1, and the reflux heating pipe 10 heats the water in the second steam generating space 42, and the steam generated in the first steam generating space 41 and the second steam generating space 42 is fed to the outside through the steam pipe 33.

[0045] During specific use, the boiler flue gas and heat are fed into the first heating tube 38 through the combustion tube 37, the first heating tube 38 performs the initial heating of the water in the first steam generating space 41, and then the boiler flue gas is secondary burned in the combustion space 40, and the water in the first steam generating space 41 and the second steam generating space 42 is secondary heated through the second partition 43, and then the boiler flue gas after the secondary combustion is thirdly heated by a plurality of second heating tubes 39 for the water in the first steam generating space 41, the collecting box 36 collects the flue gas of the plurality of second heating tubes 39, and then after being processed by the boiler flue gas treatment structure, the heat is transferred to the second steam generating space 42 through the reflux heating tube 10 to heat the water, thereby making full use of the heat of the boiler flue gas, and steam can be produced simultaneously by two boilers.

[0046] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A boiler flue gas treatment structure, comprising a flue gas inlet pipe (1), a pH leveling device (4) and a vortex tube (8), characterized in that: An acid-base impurity removal device (2) is arranged on the left side of the pH leveling device (4); the flue gas inlet pipe (1) is connected to the air inlet of the acid-base impurity removal device (2); the acid-base impurity removal device (2) is connected to the pH leveling device (4) via a first connecting pipe (3); the pH leveling device (4) is connected to the vortex tube (8) via a second connecting pipe (5); the cold air outlet of the vortex tube (8) is connected to the acid-base impurity removal device (2) via a cooling pipe (9); the high-temperature boiler flue gas is impurity-removed by the acid-base impurity removal device (2); the pH leveling device (4) adjusts the impurity-removed flue gas into neutral gas; the vortex tube (8) separates the neutral gas into a cold air flow and a hot air flow; the cold air flow is transported to the acid-base impurity removal device (2) via the cooling pipe (9); the acid-base impurity removal device (2) is cooled; A blower (7) is fixedly arranged on the rear side of the vortex tube (8), and the second connecting tube (5) is connected to the blower (7) via a blower tube (6); A power generation cold end (83) is fixedly arranged in the cold air outlet of the vortex tube (8), and a power generation hot end (84) is fixedly arranged in the hot air outlet of the vortex tube (8). The power generation cold end (83) and the power generation hot end (84) are connected via a first power generation conductor (81), and the first power generation conductor (81) is located between the blower (7) and the vortex tube (8). A storage battery (11) is fixedly arranged on the front side of the vortex tube (8), and the storage battery (11), the power generation cold end (83) and the power generation hot end (84) are connected via a second power generation conductor (82). An inverter (12) is fixedly arranged on the right side of the storage battery (11), and the blower (7) and the inverter (12) are connected via a power transmission conductor (121). The material of the first power generation conductor (81) is preferably constantan, and the material of the second power generation conductor (82) is preferably copper.

2. The boiler flue gas treatment structure according to claim 1, characterized in that: A first Venturi tube (15) is fixedly arranged on the flue gas inlet pipe (1), a second Venturi tube (16) is fixedly arranged on the first connecting pipe (3), a third Venturi tube (17) is fixedly arranged on the second connecting pipe (5), and a fifth Venturi tube (19) is fixedly arranged on the cooling pipe (9).

3. The boiler flue gas treatment structure according to claim 2, characterized in that: The hot air outlet of the vortex tube (8) is fixedly provided with a fourth venturi tube (18), the discharge outlet of the fourth venturi tube (18) is fixedly provided with a reflux heating tube (10), and the discharge outlet of the reflux heating tube (10) is fixedly provided with a second exhaust pipe (14).

4. The boiler flue gas treatment structure according to claim 3, characterized in that: The acid-base impurity removal device (2) comprises a first outer shell (21), the inner space of the first outer shell (21) is divided into a cooling space (25), an acid impurity removal space (26) and an alkaline impurity removal space (27) by two first partitions (23), the acid impurity removal space (26) and the alkaline impurity removal space (27) are connected by two symmetrically arranged ventilation pipes (24), the ventilation pipe (24) extends below the liquid surface and is provided with a plurality of air holes, an air guide pipe (22) is provided in the acid impurity removal space (26), one end of the air guide pipe (22) is connected to a first venturi (15), the other end of the air guide pipe (22) extends below the liquid surface and is provided with a plurality of air holes, a first exhaust pipe (13) is provided above the cooling space (25) and passes through the side wall of the first outer shell (21), and two spray devices (28) are symmetrically provided above the first outer shell (21).

5. The boiler flue gas treatment structure according to claim 4, characterized in that: The spray device (28) comprises a water pump (282) and a spray pipe (284); the feed port of the water pump (282) is provided with a liquid extraction pipe (281), and the liquid extraction pipe (281) passes through the top wall of the first outer shell (21) and extends below the liquid level in the first outer shell (21); the discharge port of the water pump (282) is connected to the spray pipe (284) via a liquid discharge pipe (283).

6. The boiler flue gas treatment structure according to claim 5, characterized in that: The height of the feed opening of the ventilation pipe (24) is higher than the height of the spray pipe (284).

7. A double steam boiler, comprising the boiler flue gas treatment structure according to any one of claims 3 to 6, characterized in that: The invention also comprises a second outer shell (30) and a combustion tube (37); the internal space of the second outer shell (30) is divided into a combustion space (40), a first steam generating space (41) and a second steam generating space (42) by two second partitions (43); the combustion tube (37) is connected to the combustion space (40) by a first heating tube (38); a collecting box (36) is fixedly provided on the rear side of the second outer shell (30); the collecting box (36) is connected to the combustion space (40) by a plurality of second heating tubes (39); and two second outer shells (30) are fixedly provided on the top of both sides. A water inlet pipe (34), the water inlet pipe (34) being provided with a water inlet valve (35); a drainage pipe (31) being provided at the bottom of the front end surface of the second outer shell (30); a drainage valve (32) being provided on the drainage pipe (31); and a steam pipe (33) being provided above the drainage valve (32); an air inlet of the flue gas inlet pipe (1) being connected to a collecting box (36); the reflux heating pipe (10) being extended into the second steam generating space (42); and the second exhaust pipe (14) passing through the top plate of the second outer shell (30) and extending to the outside of the second outer shell (30).

8. The double steam boiler according to claim 7, characterized in that: The reflux heating tube (10) is vertically arranged in multiple layers.

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