Heat energy recycling and recirculating system for synthesizing continuous neopentyl glycol
By designing a thermal energy recovery and recycling system for synthesizing continuous neopentyl glycol, the problem of lack of steam and water heat energy and water resources is solved, and the recycling of thermal energy and water resources is achieved, achieving the purpose of energy conservation, consumption reduction and environmental protection.
Patent Information
- Application Number
- CN202420997750.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-09
AI Technical Summary
In the production process of synthetic continuous neopentyl glycol, the heat energy and water resources of the lack of soda are wasted, and the existing waste heat recovery and heat exchangers cannot effectively solve the problem of water resources waste.
A thermal energy recovery and recycling system is designed, including a soda collection tank, a soda collection tank 1# and a soda storage tank 2#. When the soda liquid level reaches the upper limit, it will automatically flow into the storage tank for storage and pass through a reboiler and a crude water vapor tank. The recycling of heat energy and water resources is realized.
Through the implementation of this system, the thermal energy recycling of soda and water resources are realized, and the risk of high-scalding and dead bacterial seedlings with environmentally friendly sewage discharge temperature is reduced, achieving the purpose of energy conservation and consumption reduction.
Smart Images
Figure CN222460410U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heat energy recycling, and in particular relates to a heat energy recovery and recycling system for synthesizing continuous neopentyl glycol. Background Art
[0002] Neopentyl glycol (NPG) is a diol produced by the reaction of isobutyl alcohol and formaldehyde. It is an important raw material for the production of powder coatings, resins, plasticizers and lubricants. Currently, the industry generally uses disproportionation and condensation hydrogenation to produce neopentyl glycol.
[0003] At present, the inlet temperature of the spent steam water in the spent steam water collection tank for the continuous synthesis of neopentyl glycol reaches 100°C, the circulating water return temperature reaches 65°C, and the storage tank control temperature is 85°C. When the temperature is higher than 85°C, the automatic system will automatically add process water to achieve the purpose of cooling. When the liquid level is higher than 0.8m, the valve will automatically open to discharge the circulating water directly into the sewer. At present, the valve is about 2 / 3 open, and the produced water temperature is about 65°C, which will be directly discharged into the sewer, causing a great waste of heat energy and water resources.
[0004] CN217275732U discloses a waste heat recovery heat exchanger for neopentyl glycol production, which can heat exchange the heat in waste water and waste liquid with heat, thus realizing waste heat recovery. It is energy-saving and environmentally friendly, economical and applicable, and the structure of the heat exchanger is simple. Although the waste heat is recovered by the heat exchanger, the limitation is relatively small, and the water resources exchanged are still seriously wasted, which cannot be consistent with the current process design. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the above-mentioned defects in the prior art and provide a heat energy recovery and recycling system for continuously synthesizing neopentyl glycol, which can save energy and reduce consumption, and the water circulation is green and pollution-free.
[0006] The utility model discloses a heat energy recovery and recycling system for continuously synthesizing neopentyl glycol, comprising a spent steam and water collecting tank, a storage tank 1#, and a storage tank 2#, wherein the spent steam and water collecting tank is connected to the storage tank 1#, the spent steam and water collecting tank is connected to the storage tank 2#, the storage tank 1# and the storage tank 2# are connected to a crude water vapor tank, and the storage tank 1# and the storage tank 2# are connected to a reboiler.
[0007] Preferably, the spent steam water collection tank is provided with a water replenishment pipe, through which water can be replenished.
[0008] Preferably, the spent steam and water collecting tank is provided with an overflow pipe, which is arranged at the upper middle part or the top of the spent steam and water collecting tank and leads to the sewer.
[0009] Preferably, a valve is provided on the pipeline at the bottom outlet of the spent steam water collection tank.
[0010] Preferably, a feed pump is provided on the bottom outlet pipeline of the storage tank 1# and the storage tank 2#.
[0011] Preferably, the reboiler is arranged at the bottom of the recovery tower, and the circulating water outlet of the reboiler is connected to the spent steam water collection tank.
[0012] Preferably, a liquid level gauge is provided on the spent steam water collection tank. The central control personnel inform the on-site personnel to close the valve according to the liquid level gauge, and the pump stops automatically when the pipeline pressure increases. The pressure transmitter and the related pump of the utility model are interlocked, and the start and stop of the pump are controlled according to the change of pipeline pressure. When the on-site personnel open the water filling valve of the steam tank, the pipeline pressure decreases and the pump starts automatically. Since automatic control is a prior art, it will not be discussed here.
[0013] The utility model discloses a heat energy recovery and recycling system for continuous synthesis of neopentyl glycol. The storage tank 1# and the storage tank 2# are added after the spent steam water collection tank. When the liquid level of the continuous synthesis spent steam water collection tank reaches the upper limit, the valve is automatically opened, and the excess spent steam water flows into the storage tank 1# and the storage tank 2# for storage. The reboiler of the continuous synthesis of neopentyl glycol recovery tower is drained and then introduced into the spent steam water collection tank for reuse. When the crude water vapor tank needs to be added with water, the pump is turned on to pump water from the storage tank 1# and the storage tank 2# into the crude water vapor tank for reuse.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] The utility model discloses a heat energy recovery and recycling system for continuously synthesizing neopentyl glycol, in which the heat energy of exhaust steam is recycled, and circulating water is also recycled in the system, so as to achieve the purpose of energy saving and consumption reduction, and reduce the risk of killing bacteria seedlings due to high scalding temperature of environmentally friendly sewage discharge. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of a heat energy recovery and recycling system for continuously synthesizing neopentyl glycol according to the utility model.
[0017] In the figure: 1. Spent steam water collection tank; 2. Storage tank 1#; 3. Storage tank 2#; 4. Recovery tower; 5. Water supply pipe; 6. Valve; 7. Overflow pipe; 8. Reboiler; 9. Crude steam tank; 10. Feed pump; 11. Liquid level meter. DETAILED DESCRIPTION
[0018] The utility model is further described below in conjunction with specific embodiments.
[0019] like Figure 1As shown, the heat energy recovery and recycling system for synthesizing continuous neopentyl glycol includes a spent steam and water collecting tank 1, a storage tank 1#2, and a storage tank 2#3. The spent steam and water collecting tank 1 is connected to the storage tank 1#2, the spent steam and water collecting tank 1 is connected to the storage tank 2#3, the storage tank 1#2 and the storage tank 2#3 are connected to a crude water vapor tank 9, and the storage tank 1#2 and the storage tank 2#3 are connected to a reboiler 8.
[0020] The spent steam water collecting tank 1 is provided with a water replenishing pipe 5, through which water can be replenished.
[0021] The spent steam and water collecting tank 1 is provided with an overflow pipe 7. The overflow pipe is arranged at the middle and upper part or the top of the spent steam and water collecting tank 1 and leads to the sewer.
[0022] A valve 6 is provided on the pipeline at the bottom outlet of the spent steam water collecting tank 1 .
[0023] A feed pump 10 is provided on the bottom outlet pipeline of the storage tank 1#2 and the storage tank 2#3.
[0024] The reboiler 8 is arranged at the bottom of the recovery tower 4. The circulating water outlet of the reboiler 8 is connected to the spent steam water collection tank 1.
[0025] The spent steam water collection tank 1 is provided with a liquid level gauge 11. The central control personnel inform the on-site personnel to close the valve according to the liquid level gauge 11, and the pump stops automatically when the pipeline pressure increases. The pressure transmitter and the related pump of the utility model are interlocked, and the start and stop of the pump are controlled according to the change of pipeline pressure. When the on-site personnel open the water filling valve of the steam tank, the pipeline pressure decreases, and the pump starts automatically. Since the automatic control is a prior art, it will not be discussed here.
[0026] The heat energy recovery and recycling system for continuous synthesis of neopentyl glycol of the utility model adds storage tanks 1#2 and 2#3 after the spent steam and water collection tank 1. When the liquid level of the continuous synthesis spent steam and water collection tank reaches the upper limit, the valve is automatically opened, and the excess spent steam and water flows into storage tanks 1#2 and 2#3 for storage; the reboiler 8 of the continuous synthesis of neopentyl glycol recovery tower is introduced into the spent steam and water collection tank 1 for reuse after the pipeline is modified. When the crude water vapor tank 9 needs to be added with water, the pumping pump 10 is turned on to pump water from the storage tanks 1#2 and 2#3 into the crude water vapor tank 9 for reuse.
[0027] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and any equivalent changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention shall fall within the scope of the patent coverage of the present invention.
Claims
1. A heat recovery and recycling system for continuous synthesis of neopentyl glycol, characterized in that: The invention comprises a spent steam water collecting tank (1), a storage tank 1# (2), and a storage tank 2# (3); the spent steam water collecting tank (1) is connected to the storage tank 1# (2); the spent steam water collecting tank (1) is connected to the storage tank 2# (3); the storage tank 1# (2) and the storage tank 2# (3) are connected to a crude steam tank (9); and the storage tank 1# (2) and the storage tank 2# (3) are connected to a reboiler (8).
2. The heat energy recovery and recycling system for continuous synthesis of neopentyl glycol according to claim 1, characterized in that: The spent steam water collection tank (1) is provided with a water supply pipe (5).
3. The heat energy recovery and recycling system for continuous synthesis of neopentyl glycol according to claim 1, characterized in that: The spent steam water collection tank (1) is provided with an overflow pipe (7).
4. The heat energy recovery and recycling system for continuous synthesis of neopentyl glycol according to claim 1, characterized in that: A valve (6) is provided on the pipeline at the bottom outlet of the spent steam water collection tank (1).
5. The heat energy recovery and recycling system for continuous synthesis of neopentyl glycol according to claim 1, characterized in that: A feed pump (10) is provided on the bottom outlet pipeline of the storage tank 1# (2) and the storage tank 2# (3).
6. The heat energy recovery and recycling system for continuous synthesis of neopentyl glycol according to claim 1, characterized in that: The reboiler (8) is arranged at the bottom of the recovery tower (4).
7. The heat energy recovery and recycling system for continuous synthesis of neopentyl glycol according to claim 1, characterized in that: The spent steam water collecting tank (1) is provided with a liquid level meter (11).