Intelligent caustic soda flake machine with heat energy recovery function
By using thermal oil as a heat exchange medium in the intelligent alkaline machine, the problem of thermal energy loss during cooling and solidification of molten alkali is solved, and the recovery and reuse of heat energy is realized, production costs are reduced and energy conservation and environmental protection is promoted.
Patent Information
- Application Number
- CN202510263433.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-04-25
AI Technical Summary
The existing intelligent alkaline machine has a large thermal energy loss during the cooling and solidification of molten alkali, which leads to an increase in production costs and is not conducive to environmental protection.
Thermal oil is used as the heat exchange medium, and the rotating drum and molten alkali are cooled through the thermal oil circulation pipeline to achieve the recovery and utilization of heat energy.
Through the use of thermally conductive oil, more heat energy can be absorbed, and the large-scale recycling and reuse of heat energy can be achieved, production costs can be reduced, and energy conservation and environmental protection can be promoted.
Smart Images
Figure CN119869343A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of flaking machines, and in particular to an intelligent caustic soda flake machine with a heat energy recovery function. Background Art
[0002] Intelligent caustic soda flake machine, also known as intelligent solid caustic soda forming machine or intelligent flake machine, is an intelligent mechanical equipment specially used to cool molten caustic soda and prepare it into caustic soda flakes. It is widely used in the chemical industry.
[0003] During the operation of the intelligent caustic soda flake machine, the high-temperature molten alkali after evaporation and concentration is sent to the alkali tank of the caustic soda flake machine for temporary storage. The lowest part of the drum of the caustic soda flake machine is immersed in the molten alkali. When the drum rotates, its surface will entrain and evenly adhere to a part of the molten alkali liquid to form a molten alkali layer. Then, as the drum rotates, the alkali liquid adhered to the drum is gradually cooled and solidified to form a thin layer of solid alkali film. A scraper device is provided on the outside of the drum. When the cooled solid alkali reaches the scraper device, the scraper device scrapes the solidified alkali film from the surface of the drum in the form of sheets, and finally forms the required caustic soda flake product.
[0004] In the above process, the temperature of the molten alkali after evaporation and concentration, that is, the molten alkali in the alkali tank, is as high as more than 400 degrees. After these high-temperature molten alkalis are cooled and solidified on the drum, the temperature of the solid alkali is only more than 60 degrees. Therefore, there is a huge loss of heat energy in this process. The direct loss of this part of heat energy not only greatly increases the production cost, but is also very unfavorable to environmental protection. Summary of the invention
[0005] The present invention aims to provide an intelligent caustic soda flake machine with a heat energy recovery function, so as to recover and utilize the heat energy during the operation of the caustic soda flake machine and solve the problem of large heat energy loss in the existing caustic soda flake machine.
[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an intelligent caustic soda flake machine with heat energy recovery function comprises a rotary drum, an oil storage tank is arranged outside the rotary drum, the oil storage tank is used to store heat transfer oil, and the heat transfer oil is used to cool the rotary drum; an oil supply pipeline is installed in the rotary drum, one end of the oil supply pipeline passes through the rotary drum and is connected to the oil storage tank, and the other end is located in the rotary drum and is connected to a nozzle; the rotary drum is also connected to a heat transfer oil circulation pipeline, the starting end of the heat transfer oil circulation pipeline is connected to the rotary drum, and the ending end is connected to the oil supply pipeline; a heat exchange unit is arranged on the heat transfer oil circulation pipeline.
[0007] The principle of this scheme is: in the production process of caustic soda flakes, the temperature of the molten alkali entering the alkali tank is as high as more than 400 degrees. In the process of cooling and solidifying the molten alkali in the drum, in order to ensure that the molten alkali can be fully cooled and solidified, and to prevent the drum from cracking and deforming due to the temperature difference, cooling water is usually used as a heat exchange medium in the drum to cool the inner surface of the drum. In the process of cooling, the heat energy released by the molten alkali is directly lost, which not only wastes production costs, but is also very unfavorable for energy conservation and environmental protection. However, no one in the field has conducted research on the recovery of the heat energy released by the caustic soda flake machine in the process of cooling and solidifying the molten alkali. This is mainly because the cooling water obtains less heat energy in the process of cooling the drum and the molten alkali, which makes the temperature of the cooling water after heat exchange low and has no value for recycling.
[0008] In this solution, heat transfer oil is innovatively used to replace traditional cooling water as a heat exchange medium, and is used for cooling the drum and molten alkali. Compared with traditional cooling water, heat transfer oil can withstand temperatures exceeding 300°C or even higher without decomposition or deterioration, so it can work stably in a high temperature environment, which is particularly suitable for processing temperatures of up to about 400°C transmitted from the surface of the alkali flake machine drum. The drum and molten alkali are cooled by heat transfer oil, so that the heat exchange medium can obtain more heat energy, thereby achieving a greater degree of heat energy recovery. After obtaining more heat energy, the heat exchange medium flows to the heat exchange unit and is used for heat exchange with other equipment or materials, thereby realizing the reuse of the recovered heat energy, so that the alkali flake machine has a heat energy recovery function.
[0009] In addition, when using traditional cooling water as a heat exchange medium, it easily evaporates into steam under high temperature conditions, resulting in system pressure fluctuations and energy loss. However, this situation will not occur when using the heat transfer oil in this solution as a heat exchange medium. Therefore, it can be transmitted more stably in the pipeline and can manage heat more effectively.
[0010] The advantages of this solution are:
[0011] 1. Using heat transfer oil as the heat exchange medium, compared with traditional cooling water, it can absorb more heat energy, thereby realizing the recovery and utilization of the heat energy lost by the caustic soda flake machine to a greater extent, which not only greatly saves production costs, but also promotes energy conservation and environmental protection;
[0012] 2. Using thermal oil as the heat exchange medium, compared with cooling water, the pressure of the pipeline system is more stable and can manage heat more effectively.
[0013] Preferably, as an improvement, the oil supply pipeline includes a high-temperature oil supply pipeline, the heat transfer oil circulation pipeline includes a high-temperature circulation pipeline, a high-temperature zone is provided on the drum, the high-temperature oil supply pipeline is arranged in the area corresponding to the high-temperature zone, the starting end of the high-temperature circulation pipeline is connected to the drum, and the ending end is connected to the high-temperature oil supply pipeline and is used to circulate the heat transfer oil in the high-temperature zone, the heat exchange unit includes a high-temperature heat exchange unit, and the high-temperature heat exchange unit is arranged on the high-temperature circulation pipeline.
[0014] Through the above scheme, when the drum carries the molten alkali out of the alkali tank, the molten alkali on the drum still has a relatively high temperature in the initial stage. As the drum continues to rotate, the temperature of the molten alkali continues to decrease and solidify. Therefore, the temperature of the drum surface and the molten alkali on the drum changes in stages. The high-temperature zone in this scheme corresponds to the area corresponding to the initial stage when the drum carries the molten alkali out of the alkali tank. Since the temperature of the drum and the molten alkali in this area is relatively high, it has more value for heat recovery and utilization. The high-temperature oil supply pipeline exchanges heat with the area corresponding to the high-temperature zone, and the heat transfer oil that obtains more heat flows to the high-temperature heat exchange unit through the high-temperature circulation pipeline, and is used for heat exchange of other substances in the high-temperature heat exchange unit, thereby realizing the recovery and reuse of heat energy in the high-temperature zone.
[0015] Preferably, as an improvement, a high-temperature oil pump is also provided on the high-temperature circulation pipeline, and the high-temperature oil pump is located between the caustic soda flake machine and the high-temperature heat exchange unit.
[0016] Through the above scheme, the high-temperature oil pump is used to pump the heat transfer oil to ensure the flow pressure of the heat transfer oil, so that the heat transfer oil can flow smoothly in the high-temperature circulation pipeline and enter the high-temperature heat exchange unit.
[0017] Preferably, as an improvement, the high-temperature heat exchange unit is a steam boiler, and the high-temperature circulation pipeline introduces heat transfer oil from the steam boiler to heat the steam boiler and generate steam.
[0018] Through the above scheme, after the heat transfer oil absorbs the heat released by the drum and the molten alkali, it enters the steam boiler to heat the steam boiler, so that the steam boiler generates steam for use in the alkali making system, thereby reducing the energy consumption of the alkali making system and saving production costs.
[0019] Preferably, as an improvement, the oil supply pipeline also includes a low-temperature oil supply pipeline, the heat transfer oil circulation pipeline also includes a low-temperature circulation pipeline, a low-temperature zone is also provided on the drum, the low-temperature oil supply pipeline is arranged in the area corresponding to the low-temperature zone, the starting end of the low-temperature circulation pipeline is connected to the drum, and the ending end is connected to the low-temperature oil supply pipeline and is used to circulate the heat transfer oil in the low-temperature zone, the heat exchange unit also includes a low-temperature heat exchange unit, and the low-temperature heat exchange unit is arranged on the low-temperature circulation pipeline.
[0020] Through the above scheme, when the drum carries the molten alkali out of the alkali tank, the molten alkali on the drum still has a relatively high temperature in the initial stage. As the drum continues to rotate, the temperature of the molten alkali continues to decrease and finally solidifies. Therefore, the temperature of the drum surface and the molten alkali on the drum changes in stages. The low temperature zone in this scheme corresponds to the area corresponding to the later stage when the drum carries the molten alkali out of the alkali tank, that is, the area of the drum close to the scraper. Although the temperature of this area is lower than that of the high temperature zone, it still has a temperature of more than 150 degrees and still has a certain value for heat recovery. The low temperature oil supply pipeline exchanges heat with the area corresponding to the low temperature zone. The heat transfer oil after obtaining heat flows to the low temperature heat exchange unit through the low temperature circulation pipeline, and is used for heat exchange of other substances in the low temperature heat exchange unit, thereby realizing the recovery and utilization of heat energy in the low temperature zone. By using two recovery paths for the high temperature zone and the low temperature zone to recover heat at the same time, the recovery and treatment of the heat energy of the alkali flake machine is more targeted, the recovery and treatment effect of the heat energy is better, the recovery degree is greater, and the production cost is further saved.
[0021] Preferably, as an improvement, a low-temperature oil pump is also provided on the low-temperature circulation pipeline, and the low-temperature oil pump is located between the caustic soda flake machine and the low-temperature heat exchange unit.
[0022] Through the above scheme, the low-temperature oil pump is used to pump the heat transfer oil to ensure the pressure of the heat transfer oil, so that the heat transfer oil can flow smoothly in the low-temperature circulation pipeline and enter the low-temperature heat exchange unit.
[0023] Preferably, as an improvement, the low-temperature heat exchange unit is a circulating water cooler, and the heat transfer oil introduced into the circulating water cooler through the low-temperature circulation pipeline is used for heat exchange of circulating water in the circulating water cooler.
[0024] Through the above scheme, after the heat transfer oil absorbs the heat released by the low temperature zone of the drum, it enters the circulating water cooler and is used to exchange heat with the circulating water, so that the circulating water can be circulated at a predetermined temperature, thereby reducing the energy consumption of the alkali making system and saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention.
[0026] Figure 2 It is a longitudinal cross-sectional view of the rotary drum in Example 1 of the present invention.
[0027] Figure 3 This is a schematic diagram of the structure of Example 2 of the present invention. DETAILED DESCRIPTION
[0028] The following is further described in detail through specific implementations, but the implementation of the present invention is not limited thereto. Unless otherwise specified, the technical means used in the following implementations are conventional means well known to those skilled in the art; the experimental methods used are all conventional methods; the materials, reagents, etc. used can all be obtained from commercial channels.
[0029] The figure marks in the drawings of the specification include: drum 1, alkali tank 2, scraper 3, high-temperature oil supply pipeline 4, nozzle 5, high-temperature circulation pipeline 6, starting end 7, ending end 8, high-temperature zone 9, high-temperature heat exchange unit 10, high-temperature oil pump 11, low-temperature zone 12, low-temperature circulation pipeline 13, low-temperature heat exchange unit 14, and low-temperature oil pump 15.
[0030] Example 1
[0031] The intelligent caustic soda flake machine with heat recovery function in this embodiment is as follows: Figure 1 and Figure 2 As shown in common, it includes a drum 1, an alkali tank 2 is provided under the drum 1, a scraper 3 is provided on the left side of the drum 1, and an oil storage tank is provided outside the drum 1. The oil storage tank is used to store heat transfer oil, and the heat transfer oil is used to cool the drum 1; an oil supply pipeline is installed in the drum 1, one end of the oil supply pipeline passes through the drum 1 and is connected to the oil storage tank, and a nozzle 5 is connected to the end of the oil supply pipeline located in the drum 1; the drum 1 is also connected to a heat transfer oil circulation pipeline, the starting end 7 of the heat transfer oil circulation pipeline is connected to the drum 1, and the ending end 8 is connected to the oil supply pipeline; a heat exchange unit is provided on the heat transfer oil circulation pipeline.
[0032] The oil supply pipeline in this embodiment includes a high-temperature oil supply pipeline 4, the heat transfer oil circulation pipeline includes a high-temperature circulation pipeline 6, and a high-temperature zone 9 is provided on the drum 1. When the drum 1 in this embodiment is working, Figure 1 The high temperature zone 9 rotates counterclockwise as shown by the arrow, and is located on the side of the drum 1 away from the scraper 3. The high temperature oil supply pipeline 4 is arranged in the area corresponding to the high temperature zone 9. The starting end 7 of the high temperature circulation pipeline 6 is connected to the drum 1, and the ending end 8 is connected to the high temperature oil supply pipeline 4 and is used to circulate the heat transfer oil in the high temperature zone 9. The heat exchange unit includes a high temperature heat exchange unit 10, and the high temperature heat exchange unit 10 is arranged on the high temperature circulation pipeline 6. The high temperature heat exchange unit 10 in this embodiment is a steam boiler, and in actual application it can also be other equipment that requires heat exchange. The high temperature circulation pipeline 6 introduces heat transfer oil from the steam boiler to heat the steam boiler and generate steam.
[0033] A high-temperature oil pump 11 is also provided on the high-temperature circulation pipeline 6 , and the high-temperature oil pump 11 is located between the drum 1 and the high-temperature heat exchange unit 10 .
[0034] In the specific implementation of this embodiment, the drum 1 of the caustic soda flake machine works and moves along Figure 1The drum 1 rotates counterclockwise as shown, so that the molten alkali in the alkali tank 2 is entrained and coated on the surface of the drum 1, and then the drum 1 rotates counterclockwise. During the rotation of the drum 1, the high-temperature oil supply pipeline 4 and the high-temperature circulation pipeline 6 are fixed, that is, the drum 1 can rotate relative to the high-temperature oil supply pipeline 4 and the high-temperature circulation pipeline 6, and the high-temperature oil supply pipeline 4 and the high-temperature circulation pipeline 6 do not rotate with the rotation of the drum 1. In order to avoid the high-temperature oil supply pipeline 4 and the high-temperature circulation pipeline 6 from hindering the rotation of the drum 1, in actual application, it can be Figure 2 As shown, the high-temperature oil supply pipeline 4 and the high-temperature circulation pipeline 6 penetrate into or out of the drum 1 through the rotation center of the drum 1. This is a design or choice that can be made within the capabilities of those skilled in the art and will not be elaborated here.
[0035] In the initial stage of the rotation of the drum 1, the drum 1 rotates to the high temperature zone 9 where the temperature of the local area and the molten alkali are relatively high. At this time, the heat transfer oil in the oil storage tank enters the drum 1 corresponding to the high temperature zone 9 via the high temperature oil supply pipeline 4, and the nozzle 5 sprays the heat transfer oil onto the inner wall of the drum 1, thereby cooling the drum 1 and the molten alkali on the outer surface of the drum 1, and the heat transfer oil absorbs the heat released by the drum 1 and the molten alkali. The heat transfer oil flowing into the drum 1 is pumped into the high temperature circulation pipeline 6 by the high temperature oil pump 11, and flows along the high temperature circulation pipeline 6 to the high temperature heat exchange unit 10. The high temperature heat exchange unit 10 in this embodiment is a steam boiler. After the heat transfer oil enters the steam boiler, it is used to heat the steam boiler and generate steam. The generated steam can be used for the alkali making system or factory work and life. The heat of the heat transfer oil is fully utilized in the steam boiler, so that the heat transfer oil can be cooled. Then the heat transfer oil flows out of the steam boiler and flows back to the high-temperature oil supply pipeline 4 along the high-temperature circulation pipeline 6 to be used again to cool the drum 1 and the molten alkali.
[0036] Example 2
[0037] This embodiment is based on embodiment 1. Figure 3As shown, the oil supply pipeline also includes a low-temperature oil supply pipeline, and the structure of the low-temperature oil supply pipeline is the same as that of the high-temperature oil supply pipeline 4. The heat transfer oil circulation pipeline also includes a low-temperature circulation pipeline 13. A low-temperature zone 12 is also provided on the drum 1. The low-temperature zone 12 in this embodiment is located on the side of the drum 1 close to the scraper 3. After the drum 1 entrains the molten alkali from the alkali tank 2, it rotates counterclockwise, so that the molten alkali first passes through the high-temperature zone 9 and then passes through the low-temperature zone 12 before reaching the scraper 3. The low-temperature oil supply pipeline is arranged in the area corresponding to the low-temperature zone 12. The starting end of the low-temperature circulation pipeline 13 is connected to the drum 1, and the terminal end is connected to the low-temperature oil supply pipeline and is used to circulate the heat transfer oil in the low-temperature zone 12. The heat exchange unit also includes a low-temperature heat exchange unit 14, which is arranged on the low-temperature circulation pipeline 13. The low-temperature heat exchange unit 14 in this embodiment is a circulating water cooler. The heat transfer oil introduced into the circulating water cooler by the low-temperature circulation pipeline 13 is used for heat exchange of circulating water in the circulating water cooler.
[0038] A low-temperature oil pump 15 is also provided on the low-temperature circulation pipeline 13 , and the low-temperature oil pump 15 is located between the drum 1 and the low-temperature heat exchange unit 14 .
[0039] The implementation process of this embodiment is substantially the same as the implementation process and principle of Embodiment 1. As the drum 1 rotates continuously, the molten alkali on the outer surface of the drum 1 gradually cools and solidifies, and the temperature also continues to decrease. When the molten alkali enters the low temperature zone 12 through the high temperature zone 9, the temperature of the molten alkali is lower than that of the high temperature zone 9. The heat transfer oil in the oil storage tank enters the drum 1 corresponding to the low temperature zone 12 through the low temperature oil supply pipeline, and the heat transfer oil is sprayed to the inner surface of the drum 1 through the nozzle 5, thereby the molten alkali on the surface of the drum 1 and the drum 1 is heated. The molten alkali is cooled down, and the heat transfer oil absorbs the heat released by the alkali flake machine and is sent into the low-temperature circulation pipeline 13 by the low-temperature oil pump 15, and flows along the low-temperature circulation pipeline 13 to the low-temperature heat exchange unit 14. The low-temperature heat exchange unit 14 in this embodiment is a circulating water cooler. The heat transfer oil enters the circulating water cooler to exchange heat with the circulating water, so that the circulating water is heated up for use by the alkali making system, and the heat transfer oil is cooled after heat exchange and flows back from the low-temperature circulation pipeline 13 to the low-temperature oil supply pipeline for cooling the alkali flake machine.
[0040] It should be noted that the high temperature zone 9 and the low temperature zone 12 in the above embodiment do not refer to a fixed position or area on the drum 1, but are named according to the position or area corresponding to the relative change of the temperature of the molten alkali during the rotation process. Figure 1 or Figure 3 As shown, when the drum 1 rotates, the temperature of the molten alkali in the front stage is higher, and the corresponding area is the high temperature zone 9, and the temperature in the rear stage is lower, and the corresponding area is the low temperature zone 12. Finally, the molten alkali reaches the scraper 3.
[0041] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. Intelligent caustic soda flake machine with heat recovery function, including a rotary drum, characterized in that: An oil storage tank is arranged outside the drum, which is used to store heat transfer oil, and the heat transfer oil is used to cool the drum; an oil supply pipeline is installed inside the drum, one end of which passes through the drum and is connected to the oil storage tank, and the other end is located inside the drum and is connected to a nozzle; the drum is also connected to a heat transfer oil circulation pipeline, the starting end of which is connected to the drum, and the ending end is connected to the oil supply pipeline; a heat exchange unit is arranged on the heat transfer oil circulation pipeline.
2. The intelligent caustic soda flake machine with heat recovery function according to claim 1 is characterized in that: The oil supply pipeline includes a high-temperature oil supply pipeline, and the heat transfer oil circulation pipeline includes a high-temperature circulation pipeline. A high-temperature zone is provided on the drum, and the high-temperature oil supply pipeline is arranged in the area corresponding to the high-temperature zone. The starting end of the high-temperature circulation pipeline is connected to the drum, and the ending end is connected to the high-temperature oil supply pipeline and is used to circulate the heat transfer oil in the high-temperature zone. The heat exchange unit includes a high-temperature heat exchange unit, and the high-temperature heat exchange unit is arranged on the high-temperature circulation pipeline.
3. The intelligent caustic soda flake machine with heat recovery function according to claim 2 is characterized in that: A high-temperature oil pump is also provided on the high-temperature circulation pipeline, and the high-temperature oil pump is located between the drum and the high-temperature heat exchange unit.
4. The intelligent caustic soda flake machine with heat recovery function according to claim 3 is characterized in that: The high-temperature heat exchange unit is a steam boiler, and the high-temperature circulation pipeline introduces heat transfer oil from the steam boiler to heat the steam boiler and generate steam.
5. The intelligent caustic soda flake machine with heat recovery function according to any one of claims 2 to 4, characterized in that: The oil supply pipeline also includes a low-temperature oil supply pipeline, and the heat transfer oil circulation pipeline also includes a low-temperature circulation pipeline. A low-temperature zone is also provided on the drum. The low-temperature oil supply pipeline is arranged in the area corresponding to the low-temperature zone. The starting end of the low-temperature circulation pipeline is connected to the drum, and the ending end is connected to the low-temperature oil supply pipeline and is used to circulate the heat transfer oil in the low-temperature zone. The heat exchange unit also includes a low-temperature heat exchange unit, and the low-temperature heat exchange unit is arranged on the low-temperature circulation pipeline.
6. The intelligent caustic soda flake machine with heat recovery function according to claim 5 is characterized in that: A low-temperature oil pump is also provided on the low-temperature circulation pipeline, and the low-temperature oil pump is located between the drum and the low-temperature heat exchange unit.
7. The intelligent caustic soda flake machine with heat recovery function according to claim 6 is characterized in that: The low-temperature heat exchange unit is a circulating water cooler, and the heat transfer oil introduced into the circulating water cooler through the low-temperature circulation pipeline is used for heat exchange of circulating water in the circulating water cooler.