Device for producing steam by using reaction heat generated by alkane liquid dehydrogenation
By designing a reaction heat production steam device generated by the dehydrogenation of alkane liquid, the problem of unutilized hydrocarbon reaction heat energy in chemical enterprises is solved, the recovery and recycling of heat energy is realized, energy consumption and carbon emissions are reduced, and it is suitable for low-carbon environmental protection. Production.
Patent Information
- Application Number
- CN202420578476.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-03-25
AI Technical Summary
The heat energy generated by chemical companies in hydrocarbon reactions has not been effectively recycled, resulting in waste of energy and lack of effective energy recovery solutions.
A steam production device is designed using the reaction heat generated by the dehydrogenation of alkane liquid, including a gas-liquid separation tank, a heater, a cracker, a steam generator and a cooler. The thermal energy is generated through the dehydrogenation reaction of the alkane liquid and converted into steam. And reuse of the reaction material is achieved by recycling the reaction material.
It realizes the recycling of heat energy, saves energy consumption, reduces carbon emissions, is suitable for the concept of low-carbon and environmentally friendly production, and has significant economic and environmental value.
Smart Images
Figure CN222256471U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat energy recovery and utilization, in particular to a steam production device utilizing reaction heat generated by dehydrogenation of alkane liquid. Background Art
[0002] Carbon emission technologies are a series of technologies used to reduce carbon dioxide and other greenhouse gases produced by human activities. These technologies are designed to reduce carbon emissions to meet the challenges of climate change and global warming. In the actual production process of existing chemical companies, in order to reduce corporate carbon emissions and achieve green and environmentally friendly production concepts, the methods usually used include the use of clean energy, carbon capture and storage, and carbon compensation methods and technologies for processing. However, there is no effective way to implement energy recovery solutions for the actual production path of chemical companies.
[0003] In conventional chemical production processes, when hydrocarbons undergo reduction reactions, there are situations where the heat released is greater than the input power heat. However, there is no effective way to recycle the heat energy generated by the reaction, resulting in a waste of energy. Utility Model Content
[0004] The purpose of the utility model is to overcome the problem in the prior art that when hydrocarbons are reduced, some heat release is greater than the input power heat. There is no effective way to recycle the heat energy generated by the reaction, resulting in energy waste. A steam production device using the reaction heat generated by the dehydrogenation of alkane liquid is provided. The device can recycle the heat energy generated by the reduction reaction or other exothermic reactions, and then recycle the recovered reaction waste heat energy into other energy sources, thereby achieving energy saving, consumption reduction, and carbon emission reduction while obtaining additional chemical production by-products.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] The utility model discloses a steam production device utilizing reaction heat generated by dehydrogenation of alkane liquid, comprising a gas-liquid separation tank, a heater, a cracker, a steam generator, a cooler and a recooler, wherein the gas-liquid separation tank is filled with liquid alkane, the heater is connected to the gas-liquid separation tank, and a raw material metering pump is arranged between the gas-liquid separation tank and the heater, the heater is also connected to a heat exchanger, the raw material metering pump can heat, vaporize and overheat the liquid alkane in the gas-liquid separation tank through the heater at a set flow rate to generate a gasified gas flow, the cracker is connected to the heater, the gasified gas flow generated by the heater enters the cracker and is cracked, the cracker and the heat exchanger are connected to each other, and the gasified gas flow is heated, vaporized and overheated by the raw material metering pump. The steam generator is connected to the heat exchanger so that the cracked gas enters the heat exchanger from the cracker to generate heat energy. The steam generator is connected to the heat exchanger so that the heat energy generated by the heat exchanger enters the steam generator to convert water in the steam generator into steam. The heat exchanger is connected to a compressor and a water pump. The compressor is used to transport the reaction gas into the steam generator. The water pump is used to input water into the steam generator. The cooler is connected to the steam generator to cool the gas in the steam generator. The subcooler is connected to the gas-liquid separation tank to cool the gas in the gas-liquid separation tank. The subcooler is connected to a gas tank to store the gas cooled on the subcooler for further reaction.
[0007] Preferably, the thermal oil system further comprises a thermal oil reflux tank and a thermal oil heater, wherein the thermal oil reflux tank is connected to the heater, the thermal oil heater is connected to the thermal oil reflux tank, and a thermal oil pump is arranged between the thermal oil reflux tank and the thermal oil heater, and the thermal oil heater is connected to the heat exchanger, so that the thermal oil can circulate between the heater, the heat exchanger, the thermal oil heater and the thermal oil reflux tank.
[0008] Preferably, connecting air pipes are installed on both sides of the gas tank for air intake and exhaust, a pressure relief valve and a slag discharge valve are installed on the top and bottom of the gas tank respectively, and a gas filtering mechanism is arranged inside the gas tank to assist in filtering the gas inside the gas tank. Such a structural arrangement enables the gas tank to filter the gas when storing the gas and circulating the gas supply, thereby ensuring the cleanliness of the gas, so that the entire device generates fewer impurities during the reaction.
[0009] Preferably, the gas filtering mechanism includes a filter plate, which is located between the two connecting air pipes and divides the interior of the gas tank into two upper and lower areas to facilitate gas filtration. Preferably, the filter plate can also be installed at an angle to increase gas filtration efficiency.
[0010] Preferably, a filter plate cleaning mechanism is provided inside the gas tank above the filter plate, which is used to regularly clean the filter plate to ensure that the filter plate will not be blocked, thereby ensuring the filtering effect of the gas.
[0011] Preferably, the filter plate cleaning mechanism includes a mounting shaft and an air distribution pipe, wherein the mounting shaft is rotatably mounted at the upper center of the filter plate, the air distribution pipe is fixedly mounted on the mounting shaft, and the air distribution pipe is mounted horizontally and perpendicular to the axial direction of the mounting shaft, a plurality of back-blowing air nozzles are equidistantly mounted below the air distribution pipe, an air supply pipe is connected above the air distribution pipe, the air supply pipe is connected to a compressor, a valve that can be opened and closed at a time is installed on the connecting pipeline, a motor is installed below the filter plate, and the output shaft of the motor is drivingly connected to the mounting shaft, such a structural arrangement enables the motor to drive the air distribution pipe to rotate through the mounting shaft when it is running, and the air supply pipe can provide high-pressure gas into the device, so as to achieve the effect of back-blowing and cleaning the filter plate through the back-blowing air nozzle.
[0012] Preferably, since the number of filter holes on the filter plate surface gradually increases from the inside to the outside, the diameter of the air holes of the back-blowing air nozzle gradually increases from the inside to the outside along the radius of the filter plate. Such a structure can make the cleaning wind force of the filter plate gradually increase from the center to the edge, thus ensuring that the back-blowing cleaning of the filter plate surface is more thorough.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] The device can heat and gasify alkane liquid to crack hydrocarbon gas and hydrogen atoms. It uses the characteristic that "atomic hydrogen can be reformed and combined into molecular hydrogen on the metal surface and release a large amount of heat" to collect the large amount of heat generated by the reaction, add water to convert it into steam energy, and then use H2S and catalyst to re-synthesize the remaining molecular hydrogen and hydrocarbons in the device to obtain alkane liquid, so that the reaction materials can be recycled.
[0015] The gas tank in the device is provided with a gas filtering mechanism inside the gas tank that can assist in filtering the gas inside the gas tank, so that the gas tank can filter the gas when storing the gas and circulating the gas supply, ensuring the cleanliness of the gas, so that the entire device generates less impurities during the reaction, and a filter plate cleaning mechanism is provided above the filter plate, which can regularly clean the filter plate to ensure that the filter plate will not be blocked, thereby ensuring the gas filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the overall structure of the gas tank in the utility model;
[0018] Figure 3 The internal structure of the gas tank in the utility model is shown in FIG. Figure 1 ;
[0019] Figure 4 The internal structure of the gas tank in the utility model is shown in FIG. Figure 2 .
[0020] Figure numerals: 1. thermal oil pump; 2. thermal oil reflux tank; 3. thermal oil heater; 4. raw material metering pump; 5. heater; 6. cracker; 7. heat exchanger; 8. steam generator; 9. compressor; 10. cooler; 11. recooler; 12. gas tank; 121. slag discharge valve; 122. pressure relief valve; 123. connecting air pipe; 13. gas-liquid separation tank; 14. water pump; 151. mounting shaft; 152. gas distribution pipe; 153. backblowing air nozzle; 154. filter plate; 155. motor; 156. air supply pipe. DETAILED DESCRIPTION
[0021] The following is combined with Figure 1-4 , further illustrating the specific implementation of the utility model of a steam production device using the reaction heat generated by the dehydrogenation of alkane liquid, which overcomes the problem in the prior art that when hydrocarbons are reduced, some situations in the heat released are greater than the input power heat. However, there is no effective way to recycle the heat energy generated by the reaction, resulting in the defect of wasting energy. The device can recycle the heat energy generated by the reduction reaction or other exothermic reactions, and then reuse the recovered reaction waste heat energy and convert it into other energy sources, thereby achieving energy saving and consumption reduction and reducing carbon emissions while obtaining additional chemical production by-products. The utility model of a steam production device using the reaction heat generated by the dehydrogenation of alkane liquid is not limited to the description of the following embodiments. Example
[0022] This embodiment provides a steam production device using the reaction heat generated by dehydrogenation of alkane liquid. Figure 1 As shown, before the device is started, liquid alkane C6H 12 , liquid alkane C6H 12 The volume capacity in the gas-liquid separation tank is 30%, H2S gas is injected into the gas tank 12, and the water pump 14 inputs water into the steam generator 8. The thermal oil reflux tank 2 and the thermal oil pump 1 are turned on to circulate the thermal oil to the reflux tank 2. The thermal oil heater 3 is turned on to heat the thermal oil until the thermal oil temperature rises to 320°C, and then the thermal oil heater 3 is turned off to keep the thermal oil pump 1 running, so that the thermal oil can continue to circulate in the device.
[0023] Open the raw material metering pump 4 to make the liquid alkane C6H 12The obtained C6H 12 The gasified gas flow enters the inlet of the cracker 6 from the outlet of the heater 5, C6H 12 It is cracked into C6H6 and 6H atomic hydrogen. The cracked gas continues to enter the inlet of the heat exchanger 7 from the outlet of the cracker 6. The C6H6 and 6H atomic hydrogen gases and the metal surface inside the heat exchanger, the atomic hydrogen combines into molecular hydrogen and releases a large amount of heat. Part of the heat is used to replenish the power heat when starting the machine through the heat transfer oil heat exchange effect, and the other part of the heat enters the inlet of the steam generator 8 from the outlet of the heat exchanger 7. The heat converts the water in the steam generator 8 into steam. In the steam generator, the C6H6 and 2H2 gas flows from the outlet of the heat exchanger 7 with the heat and reacts with the H2S gas delivered from the compressor 9 in the steam generator 8. Specifically, C6H6+ 3H2+ H2S is reduced to C6H 12 , H2S enters cooler 10 through the outlet of steam generator 8 and is cooled to become C6H 12 + H2S gas-liquid. H2S enters the gas tank 12 through the recooler 11 for storage and is used for further reaction.
[0024] Liquid alkane C6H 12 To complete the closed-loop cycle, only water needs to be added into the device to continuously produce steam with low energy consumption.
[0025] According to experimental calculations, by using C6H 12 After heating to above 350℃ and inputting 8731KJ of power heat energy, C6H 12 Decomposed into C6H6 + 3H2, the total heat release energy is greater than 58206KJ. The heat release energy of the entire reaction process is much greater than the input energy, and the input power heat is only 15% of the heat release. Therefore, after the cycle reaction, C6H 12 No external power or heat is required, and steam can be produced by inputting water. The power consumption for producing 1.0 ton of steam according to the method provided by the present invention is only 36 kWh, which has obvious energy-saving and emission-reduction effects, is particularly suitable for the current low-carbon and environmentally friendly production concept, and has good economic and environmental value.
[0026] The reaction scheme of this embodiment is as follows:
[0027]
[0028] The alkane liquid has 5 to 12 carbon atoms, more preferably 6 to 8 carbon atoms, and most preferably C6H 12The heating temperature of the alkane liquid is 350°C, the volume ratio of the alkane liquid to H2S is 1:(1-2), the catalyst is a benzene hydrogenation catalyst, the volume space velocity during the catalytic reaction is 500-1000 h-1, and the volume ratio of water to the alkane liquid is 1:(1-5). Example
[0029] This embodiment provides a steam production device using the reaction heat generated by dehydrogenation of alkane liquid. Figure 2-4 As shown, connecting air pipes 123 are installed on both sides of the gas tank 12 for air intake and exhaust, and a pressure relief valve 122 and a slag discharge valve 121 are installed on the top and bottom of the gas tank 12 respectively. A gas filtering mechanism that can assist in filtering the gas inside the gas tank 12 is arranged inside the gas tank 12. Such a structural arrangement enables the gas tank 12 to filter the gas when storing the gas and circulating the gas supply, thereby ensuring the cleanliness of the gas, so that the entire device generates less impurities during the reaction.
[0030] The gas filtering mechanism includes a filter plate 154, which is located between the two connecting air pipes 123 and divides the interior of the gas tank 12 into two upper and lower areas to facilitate gas filtering. Preferably, the filter plate 154 can also be installed at an angle to increase gas filtering efficiency.
[0031] A filter plate cleaning mechanism is provided inside the gas tank 12 above the filter plate 154, which is used to regularly clean the filter plate 154 to ensure that the filter plate 154 will not be blocked, thereby ensuring the filtering effect of the gas.
[0032] The filter plate cleaning mechanism includes a mounting shaft 151 and an air distribution pipe 152, wherein the mounting shaft 151 is rotatably mounted at the upper center of the filter plate 154, the air distribution pipe 152 is fixedly mounted on the mounting shaft 151, and the air distribution pipe 152 is mounted horizontally and perpendicular to the axial direction of the mounting shaft 151, a number of back-blowing air nozzles 153 are equidistantly mounted below the air distribution pipe 152, an air supply pipe 156 is connected above the air distribution pipe 152, the air supply pipe 156 is connected to the compressor 9, a valve that can be timed to open and close is installed on the connecting pipeline, a motor 155 is installed below the filter plate 154, and the output shaft of the motor 155 is drivingly connected to the mounting shaft 151.
[0033] As the number of filter holes on the surface of the filter plate 154 gradually increases from the inside to the outside, the diameter of the air holes of the back-blowing air nozzle 153 gradually increases from the inside to the outside along the radius of the filter plate 154. Such a structure can gradually increase the cleaning wind force of the filter plate 154 from the center to the edge, thereby ensuring that the back-blowing cleaning of the surface of the filter plate 154 is more thorough.
[0034] By adopting the above technical solution:
[0035] When the motor 155 is running, it can drive the gas distribution pipe 152 to rotate through the installation shaft 151, and the gas supply pipe 156 can provide high-pressure gas into the device to achieve the effect of back-blowing and cleaning the filter plate 154 through the back-blowing air nozzle 153.
[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A steam production device using the reaction heat generated by dehydrogenation of alkane liquid, characterized in that: include: A gas-liquid separation tank (13) containing liquid alkane; a heater (5) connected to the gas-liquid separation tank (13), and a raw material metering pump (4) is provided between the gas-liquid separation tank (13) and the heater (5); the heater (5) is also connected to a heat exchanger (7); the raw material metering pump (4) is capable of heating, vaporizing, and superheating the liquid alkane in the gas-liquid separation tank (13) through the heater (5) at a set flow rate to generate a gasified gas flow; A cracker (6) connected to the heater (5) so that the gasified gas flow generated by the heater (5) enters the cracker (6) to be cracked. The cracker (6) is connected to the heat exchanger (7) so that the cracked gas enters the heat exchanger (7) from the cracker (6) to generate heat energy. a steam generator (8) connected to the heat exchanger (7) so that heat energy generated by the heat exchanger (7) enters the steam generator (8) and water in the steam generator (8) is converted into steam; the heat exchanger (7) is connected to a compressor (9) and a water pump (14); the compressor (9) is used to transport reaction gas into the steam generator (8); and the water pump (14) is used to input water into the steam generator (8); a cooler (10), connected to the steam generator (8) and used to cool the gas in the steam generator (8); A subcooler (11) is connected to the gas-liquid separation tank (13) and is used to cool the gas in the gas-liquid separation tank (13). The subcooler (11) is connected to a gas tank (12) and is used to store the gas cooled in the subcooler (11) for further reaction.
2. The steam production device using the reaction heat generated by dehydrogenation of alkane liquid according to claim 1, characterized in that: Also includes: A heat transfer oil reflux tank (2), which is connected to the heater (5); A thermal oil heater (3) is connected to the thermal oil reflux tank (2), and a thermal oil pump (1) is provided between the thermal oil reflux tank (2) and the thermal oil heater (3). The thermal oil heater (3) is connected to the heat exchanger (7), so that the thermal oil can circulate between the heater (5), the heat exchanger (7), the thermal oil heater (3) and the thermal oil reflux tank (2).
3. The steam production device using the reaction heat generated by dehydrogenation of alkane liquid according to claim 1, characterized in that: Connecting gas pipes (123) are installed on both sides of the gas tank (12) for gas intake and gas exhaust, a pressure relief valve (122) and a slag discharge valve (121) are installed on the top and bottom of the gas tank (12), respectively, and a gas filtering mechanism capable of assisting in filtering the gas inside the gas tank (12) is arranged inside the gas tank (12).
4. The steam production device using the reaction heat generated by dehydrogenation of alkane liquid according to claim 3, characterized in that: The gas filtering mechanism comprises a filter plate (154), wherein the filter plate (154) is located between the two connecting gas pipes (123) and divides the interior of the gas tank (12) into two upper and lower areas.
5. The steam production device using the reaction heat generated by dehydrogenation of alkane liquid according to claim 4, characterized in that: A filter plate cleaning mechanism is provided inside the gas tank (12) above the filter plate (154), and is used to regularly clean the filter plate (154).
6. The steam production device using the reaction heat generated by dehydrogenation of alkane liquid according to claim 5, characterized in that: The filter plate cleaning mechanism comprises: A mounting shaft (151) rotatably mounted at the upper center of the filter plate (154); An air distribution pipe (152) fixedly mounted on the mounting shaft (151), and the air distribution pipe (152) is mounted horizontally and perpendicularly to the axial direction of the mounting shaft (151); A plurality of back-blowing air nozzles (153) are equidistantly installed below the air distribution pipe (152), an air supply pipe (156) is connected above the air distribution pipe (152), a motor (155) is installed below the filter plate (154), and an output shaft of the motor (155) is drivingly connected to the mounting shaft (151).
7. The steam production device using the reaction heat generated by dehydrogenation of alkane liquid according to claim 6, characterized in that: The diameter of the air holes of the back-blowing air nozzle (153) gradually increases from the inside to the outside along the radius direction of the filter plate (154).