An activated carbon environmental protection desorption recycling treatment system and method using combustible ice as fuel

Abstract

The present invention discloses an environmentally friendly activated carbon desorption recycling treatment system using combustible ice as fuel, which includes an activated carbon desorption device, a steam boiler device and a heating furnace device. The activated carbon desorption device includes a temporary desorber and a permanent desorber. The steam boiler device includes a waste heat boiler. The heating furnace device includes a fuel tank, an ejector, an incinerator and an anoxic combustion reduction furnace. The fuel tank is sequentially connected to the ejector and the incinerator. The incinerator is connected to the waste heat boiler and the anoxic combustion reduction furnace. The steam outlet of the waste heat boiler is connected to the inlet of the temporary desorber. The outlet of the anoxic combustion reduction furnace is connected to the inlet of the permanent desorber. The outlets of the temporary desorber and the permanent desorber are respectively connected to the ejector. This solution also provides an environmentally friendly activated carbon desorption treatment method. This design uses two desorbers for activated carbon desorption treatment, and the VOC organic waste gas generated by the desorption treatment is sent back to the incinerator for treatment, realizing circular economy, energy conservation and emission reduction.

Description

Technical Field

[0001] The present invention relates to the technical field of organic waste gas treatment, and particularly to an activated carbon environmental protection desorption recycling treatment system and method using combustible ice as fuel. Background Art

[0002] Existing industrial organic waste gas contains various air pollutants, abbreviated as VOC S , if directly discharged into the atmosphere, it will cause serious pollution to the atmospheric environment and directly endanger human health. The purification method of industrial organic waste gas has become a common concern in society.

[0003] Currently, for the treatment of industrial organic waste gas, the activated carbon adsorption method is generally used for purification treatment. However, when the general activated carbon adsorption system adsorbs a certain amount, it will reach saturation and cannot effectively adsorb anymore, and the activated carbon needs to be desorbed. However, in the existing activated carbon desorption process, gas containing VOC S organic waste gas is also generated, and the environmental protection effect is not good. Summary of the Invention

[0004] To solve the problems raised in the above background art, this solution provides an activated carbon environmental protection desorption recycling treatment system and method using combustible ice as fuel. By optimizing the system, the waste gas generated during the activated carbon desorption process is recycled, achieving the purpose of environmental protection and energy conservation.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an activated carbon environmental protection desorption recycling treatment system using combustible ice as fuel, including an activated carbon desorption device, and a steam boiler device and a heating furnace device that respectively provide heat energy for the activated carbon desorption device for desorption. The activated carbon desorption device includes a temporary desorber and a permanent desorber. The steam boiler device includes a waste heat boiler. The heating furnace device includes a fuel tank, an ejector, an incinerator, and an anoxic combustion reduction furnace; the fuel tank is sequentially connected to the ejector and the incinerator. The incinerator is provided with a first outlet and a second outlet. The first outlet is connected to the waste heat boiler, and the second outlet is connected to the anoxic combustion reduction furnace. The steam outlet of the waste heat boiler is connected to the inlet of the temporary desorber, and the outlet of the anoxic combustion reduction furnace is connected to the inlet of the permanent desorber. The outlets of the temporary desorber and the permanent desorber are respectively connected to the ejector. This design uses the incinerator to respectively supply heat energy to the waste heat boiler and the anoxic combustion reduction furnace. The waste heat boiler and the anoxic combustion reduction furnace respectively perform low-temperature and high-temperature desorption treatments on the temporary desorber and the permanent desorber. On the one hand, it can meet the needs of different users. On the other hand, the waste gas generated during the treatment of the temporary desorber and the permanent desorber will be recovered into the ejector and recycled and heated in the incinerator, achieving the purpose of environmental protection, energy conservation, and emission reduction.

[0006] Further, the fuel tank is filled with solid combustible ice fuel. Natural Gas Hydrate / Gas Hydrate, namely combustible ice, is an ice-like crystalline substance formed by natural gas and water under high pressure and low temperature conditions. After combustible ice burns, only a small amount of carbon dioxide and water are generated, and the pollution is much less than that of coal, petroleum, etc. Moreover, its reserves are huge, and it is internationally recognized as a replacement energy source for petroleum and the like.

[0007] Further, it also includes a cooling device. The cooling device includes a water tank, a water pump, a water jacket, and a heat exchanger that are connected in sequence for circulation. The fuel tank is immersed in the water jacket. The working principle of this designed cooling device is as follows: The water pump pumps the water in the water tank to the water jacket. The water jacket absorbs the cold energy released by the gasification of the combustible ice in the fuel tank. The cold water generated by the water jacket enters the heat exchanger, where the hot air generated in the plant can be cooled. The cold air generated by the cooling can be used in the air-conditioned room. The water discharged from the heat exchanger is recycled to the water tank to achieve the purpose of recycling, energy conservation, and environmental protection. Among them, the water pump is provided with a first water outlet and a second water outlet. The first water outlet is connected to the water jacket, and the second water outlet is connected to the waste heat boiler. The water pump can also actively supply water to the waste heat boiler. A liquid level control valve can be set at the water inlet of the waste heat boiler (or a control valve can be set at the second water outlet) to automatically control the water supply of the water pump.

[0008] Further, the steam boiler device also includes a chimney, and the chimney is connected to the flue gas outlet of the waste heat boiler.

[0009] Further, the heating furnace device also includes a blower, and the blower is connected to the incinerator to supply fresh air for combustion support.

[0010] Further, a first control valve is provided on the pipeline of the first outlet of the incinerator, and a second control valve is provided on the pipeline of the second outlet of the incinerator. Among them, the ejector is provided with a first gas port and a second gas port. The first gas port is connected to the incinerator, the second gas port is connected to the anoxic combustion reduction furnace, and a third control valve is provided at the second gas port.

[0011] The present invention also provides an environment-friendly activated carbon desorption treatment method. Based on the above-mentioned activated carbon environment-friendly desorption recycling treatment system using combustible ice as fuel, the fuel tank and the ejector supply gas to the incinerator and the anoxic combustion reduction furnace. The incinerator outputs medium-temperature flue gas with an oxygen content of 8% - 13% (preferably 10%) and a temperature of 600°C - 850°C (preferably around 800°C) to the waste heat boiler and the anoxic combustion reduction furnace respectively. The waste heat boiler provides steam at 150°C - 170°C (preferably around 160°C) for desorption treatment to the temporary desorber, and the anoxic combustion reduction furnace provides high-temperature flue gas at 900°C - 1100°C (around 1000°C) for desorption treatment to the permanent desorber. The low-temperature desorption gas and the high-temperature desorption gas generated by the temporary desorber and the permanent desorber respectively flow back to the ejector for recycling. Among them, the high-temperature flue gas is a mixture of CO2 + CO + N2, the low-temperature desorption gas is a mixture of H2O + VOC S mixture, and the high-temperature desorption gas is CO2 + CO + N2 + VOC S , this method reduces the pollution of VOC S organic waste gas to the environment through the reflux secondary combustion treatment of the low-temperature desorption gas and the high-temperature desorption gas, and is energy-saving and environment-friendly with good desorption effect.

[0012] The beneficial effects of the present invention are as follows: The structure of this solution is scientific and reasonable, and the desorption effect is good. Combustible ice is used to provide clean gas for the incinerator and the anoxic combustion reduction furnace. The waste heat boiler and the anoxic combustion reduction furnace respectively perform desorption treatments on the temporary desorber and the permanent desorber to meet the needs of different users; the VOC s organic waste gas generated during the desorption treatment of the temporary desorber and the permanent desorber is sent back to the incinerator and the anoxic combustion by the ejector for treatment, realizing circular economy, energy conservation and emission reduction. To improve the continuous combustion of combustible ice, this design also introduces a cooling circulation system. The water jacket provides the heat for gasification to the combustible ice tank, and the cold water generated by the water jacket can provide cold air for the workshop through the heat exchanger, improving the working environment quality of the workshop. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a principle block diagram of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that these specific embodiments are only representative specific embodiments of the present invention. The specific methods, devices, conditions, materials, etc. exemplified therein are not intended to limit the present invention or the corresponding specific embodiments. Specifically, the temperature descriptions of steam, air, flue gas, etc. in this embodiment are the optimal examples and do not limit their specific working temperatures. For this reason, the devices in the drawings are only used to express their relative positions and are not drawn according to their actual proportions. First, it is stated. Among them, the arrows in the drawings indicate the flow direction of the fluid.

[0015] As Figure 1 shown, an activated carbon environmental protection desorption circulation treatment system using combustible ice as fuel includes an activated carbon desorption device, a steam boiler device and a heating furnace device that respectively provide heat energy for the activated carbon desorption device to desorb VOC s gas. Among them, the activated carbon desorption device is composed of a temporary desorption device and a permanent desorption device. The steam boiler device includes a waste heat boiler and a chimney, and the chimney is connected to the flue gas outlet of the waste heat boiler. The heating furnace device includes a blower, a fuel tank, an ejector, an incinerator and an anoxic combustion reduction furnace; the incinerator is provided with a first outlet and a second outlet. The first outlet is connected to the waste heat boiler, and the second outlet is connected to the anoxic combustion reduction furnace. One end of the ejector is connected to the fuel tank, and the other end is provided with a first gas port and a second gas port. The first gas port is connected to the incinerator, and the second gas port is connected to the anoxic combustion reduction furnace. The fuel tank provides fuel for the incinerator and the anoxic combustion reduction furnace through the ejector. The blower is connected to the incinerator to supply fresh combustion-supporting air to the incinerator. The steam outlet of the waste heat boiler is connected to the inlet of the temporary desorption device, and the outlet of the anoxic combustion reduction furnace is connected to the inlet of the permanent desorption device. The outlets of the temporary desorption device and the permanent desorption device are respectively connected to the ejector to form a circulation loop. In this design, the incinerator respectively gives heat energy to the waste heat boiler and the anoxic combustion reduction furnace. The waste heat boiler and the anoxic combustion reduction furnace respectively perform medium-low temperature and high temperature desorption treatments on the temporary desorption device and the permanent desorption device. The activated carbon can be first treated in the temporary desorption device and then transferred to the permanent desorption device for treatment. On the one hand, the desorption effect and working efficiency are improved. On the other hand, the waste gas generated during the treatment of the temporary desorption device and the permanent desorption device will be recovered into the ejector and burned in the incinerator to achieve the purposes of environmental protection, energy conservation and emission reduction.

[0016] Furthermore, the fuel tank is filled with solid combustible ice. Natural Gas Hydrate / Gas Hydrate, that is, combustible ice, is an ice-like crystalline substance formed by natural gas and water under high pressure and low temperature conditions. After combustible ice burns, only a small amount of carbon dioxide and water are generated, and the pollution is much smaller than that of coal, oil, etc. Moreover, its reserves are huge, and it is internationally recognized as a replacement energy source for oil, etc.

[0017] Furthermore, it further includes a cooling device. The cooling device includes a water tank, a water pump, a water jacket, and a heat exchanger that are connected in a circulating sequence. The fuel tank is immersed in the water jacket. The working principle of the designed cooling device is as follows: The water pump pumps the water in the water tank to the water jacket. The water jacket provides heat energy for the gasification and release of the gas in the fuel tank. The cold water generated by the water jacket enters the heat exchanger, where the hot air generated in the plant can be cooled. The cold air generated by the cooling can be used in the air-conditioned room. The water discharged from the heat exchanger is recycled to the water tank, achieving the purpose of recycling, energy conservation, and environmental protection. Among them, the water pump is provided with a first water outlet and a second water outlet. The first water outlet is connected to the water jacket, and the second water outlet is connected to the waste heat boiler. The water pump can also actively supply water to the waste heat boiler. A liquid level control valve can be arranged at the water inlet of the waste heat boiler (or a control valve can be arranged at the second water outlet) to automatically control the water supply of the water pump.

[0018] Furthermore, a first control valve is arranged on the pipeline at the first outlet of the incinerator, a second control valve is arranged on the pipeline at the second outlet of the incinerator, and a third control valve is arranged on the pipeline at the second gas port; the first control valve and the second control valve can regulate the amount of medium-temperature flue gas output by the incinerator, and the third control valve is used to control the fuel supply amount of the anoxic combustion reduction furnace.

[0019] The present invention also provides an environment-friendly activated carbon desorption treatment method. Based on the above-mentioned activated carbon environmental protection desorption circulation treatment system using combustible ice as fuel, the fuel tank and the ejector provide gas for the incinerator and the anoxic combustion reduction furnace. The incinerator respectively outputs medium-temperature flue gas with an oxygen content of 8% - 13% (preferably 10%) and a temperature of 600°C - 850°C (preferably about 800°C) to the waste heat boiler and the anoxic combustion reduction furnace. The waste heat boiler provides steam at 150°C - 170°C (preferably about 160°C) for the temporary desorption device for desorption treatment. The anoxic combustion reduction furnace provides high-temperature flue gas at 900°C - 1100°C (about 1000°C) for the permanent desorption device for desorption treatment. The low-temperature desorption gas and the high-temperature desorption gas generated by the temporary desorption device and the permanent desorption device respectively flow back to the ejector for recycling. Among them, the high-temperature flue gas is a mixture of CO2 + CO + N2, the low-temperature desorption gas is a mixture of H2O + VOC S mixture, and the high-temperature desorption gas is a mixture of CO2 + CO + N2 + VOC S , this method reduces the pollution of VOC S organic waste gas to the environment through the recovery and secondary combustion treatment of the low-temperature desorption gas and the high-temperature desorption gas, and is energy-saving, environmentally friendly, and has a good desorption effect.

[0020] The above are only the preferred embodiments of the present invention, and the scope of implementation of the present invention cannot be limited thereby. That is, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the invention description still fall within the scope covered by the patent of the present invention.

Claims

1. An activated carbon environmental protection desorption cycle treatment system using combustible ice as fuel, characterized in that, It includes an activated carbon desorption device, a steam boiler device, a heating furnace device and a cooling device. The activated carbon desorption device includes a temporary desorber and a permanent desorber. The steam boiler device includes a waste heat boiler. The heating furnace device includes a fuel tank, an ejector, an incinerator and an anoxic combustion reduction furnace. The fuel tank is sequentially connected to the ejector and the incinerator. The incinerator is provided with a first outlet and a second outlet. The first outlet is connected to the waste heat boiler, and the second outlet is connected to the anoxic combustion reduction furnace. The steam outlet of the waste heat boiler is connected to the inlet of the temporary desorber. The outlet of the anoxic combustion reduction furnace is connected to the inlet of the permanent desorber. The outlets of the temporary desorber and the permanent desorber are respectively connected to the ejector. The cooling device includes a water tank, a water pump, a water jacket and a heat exchanger that are connected in a cycle. The fuel tank is immersed in the water jacket. The ejector is provided with a first gas port and a second gas port. The first gas port is connected to the incinerator, and the second gas port is connected to the anoxic combustion reduction furnace. A third control valve is provided at the second gas port. The fuel tank is filled with solid combustible ice fuel.

2. The activated carbon environmental protection desorption recycling treatment system using combustible ice as fuel according to claim 1, wherein, The water pump is provided with a first water outlet and a second water outlet. The first water outlet is connected to the water jacket, and the second water outlet is connected to the waste heat boiler.

3. The activated carbon environmental protection desorption recycling treatment system using combustible ice as fuel according to claim 1 is characterized in that, The steam boiler device further includes a chimney, and the chimney is connected to the flue gas outlet of the waste heat boiler.

4. An activated carbon environmental protection desorption recycling treatment system using combustible ice as fuel according to claim 1, characterized in that, The heating furnace device further includes a blower, and the blower is connected to the incinerator.

5. An activated carbon environmental protection desorption recycling treatment system using combustible ice as fuel according to claim 1 or 4, characterized in that, A first control valve is provided on the pipeline of the first outlet of the incinerator, and a second control valve is provided on the pipeline of the second outlet of the incinerator.

6. An environment-friendly activated carbon desorption treatment method, characterized in that, Based on any one of claims 1-5, for an activated carbon environmental protection desorption cycle treatment system using combustible ice as fuel, the incinerator outputs medium-temperature flue gas at 600°C to 850°C to the waste heat boiler and the anoxic combustion reduction furnace respectively. The waste heat boiler provides steam at 150°C to 170°C for the temporary desorber for desorption treatment. The anoxic combustion reduction furnace provides high-temperature flue gas at 900°C to 1100°C for the permanent desorber for desorption treatment. The low-temperature desorption gas and high-temperature desorption gas generated by the temporary desorber and the permanent desorber respectively flow back to the ejector for recycling.

7. An environment-friendly activated carbon desorption treatment method according to claim 6, characterized in that, The oxygen content of the medium-temperature flue gas is 8% - 13%, and the temperature of the medium-temperature flue gas is 800 °C; the high-temperature flue gas is a mixture of CO2 + CO + N2, and the temperature of the high-temperature flue gas is 1000 °C; the low-temperature desorbed gas is a mixture of H2O + VOC S mixture, and the high-temperature desorbed gas is CO2 + CO + N2 + VOC S , and the temperature of the steam is 160 °C.

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