A heat conducting oil waste heat recovery system

Abstract

The utility model relates to a steam production equipment field especially relates to a heat conducting oil waste heat recovery system, including: condensate tank, evaporative water supply tank and heat conducting oil steam generator, the outlet of condensate tank is connected with the second import of condensate tank and the import of evaporative water supply tank respectively, the outlet of evaporative water supply tank is connected with the first import of heat conducting oil steam generator, the second import of heat conducting oil steam generator is connected with heat conducting oil oil inlet system, the first outlet of heat conducting oil steam generator is connected with process steam equipment, and the second outlet of heat conducting oil steam generator is connected with heat conducting oil oil return system, the heat conducting oil waste heat recovery system of the utility model utilizes high temperature heat conducting oil to carry out heat exchange, fully utilizes the heat energy of heat conducting oil to produce steam, enriches the utilization mode of heat conducting oil heat energy, improves heat energy utilization efficiency, and the generated steam also creates economic value.

Description

Technical Field

[0001] This utility model relates to the field of steam production equipment, and in particular to a heat transfer oil waste heat recovery system. Background Technology

[0002] A waste heat recovery steam unit for thermal oil is an energy-saving device that utilizes the waste heat emitted from thermal oil systems in industrial production, converting low-grade heat energy into steam through heat exchange technology. Its core function is to recover previously wasted heat and produce reusable steam, thereby improving energy efficiency and reducing energy costs.

[0003] The following problems exist in the current use of heat transfer oil:

[0004] 1. Currently, there is no corresponding waste heat recovery process for heat transfer oil. After passing through the factory's own waste heat boiler, the temperature of the heat transfer oil may reach above 260℃ when it reaches the workshop. It is necessary to use the heat medium cooler ② on the workshop production line to cool it down, which occupies production resources and reduces production efficiency.

[0005] 2. When the temperature of the heat transfer oil is too high, manually controlling the switch valve ① to pass the heat transfer oil into the heat medium cooler ② on the idle production line to exchange heat and cool down using cooling water cannot effectively recover the heat energy of the heat transfer oil, resulting in energy waste and increased production and manufacturing costs.

[0006] 3. Currently, the residual temperature of steam condensate is ≥70℃, but it is only collected without corresponding waste heat recovery process, resulting in energy waste and increased production costs.

[0007] 4. Fluctuations in external steam can disrupt normal production plans, making it difficult to guarantee the stability of production conditions. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a waste heat recovery system for heat transfer oil.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A waste heat recovery system for heat transfer oil is provided, comprising: a condensate water tank, an evaporation makeup water tank, and a heat transfer oil steam generator;

[0011] The first inlet of the condensate tank is connected to a condensate supply system, and the outlet of the condensate tank is connected to both the second inlet of the condensate tank and the inlet of the evaporation makeup water tank. The outlet of the evaporation makeup water tank is connected to the first inlet of the thermal oil steam generator. The second inlet of the thermal oil steam generator is connected to a thermal oil inlet system. The first outlet of the thermal oil steam generator is connected to the process steam equipment, and the second outlet of the thermal oil steam generator is connected to a thermal oil return system.

[0012] All connections are pipe connections.

[0013] Preferably, a first pneumatic switch valve is provided between the condensate water supply system and the first inlet of the condensate water tank.

[0014] Preferably, a first water replenishment pump and a conductivity monitoring component are provided between the outlet of the condensate water tank and the second inlet of the condensate water tank and the inlet of the evaporation water replenishment tank.

[0015] More preferably, a second pneumatic switch valve is provided between the conductivity monitoring component and the second inlet of the condensate water tank, and a third pneumatic switch valve is provided between the conductivity monitoring component and the inlet of the evaporation makeup water tank.

[0016] Preferably, a second water supply pump is provided between the outlet of the evaporation water supply tank and the first inlet of the heat transfer oil steam generator.

[0017] Preferably, a first pneumatic regulating valve is provided between the heat transfer oil inlet system and the second inlet of the heat transfer oil steam generator.

[0018] Preferably, a second pneumatic regulating valve is provided between the first outlet of the heat transfer oil steam generator and the process steam equipment.

[0019] Preferably, the inlet of the process steam equipment is also connected to a thermal power plant steam transmission system, and a third pneumatic regulating valve is provided between the thermal power plant steam transmission system and the inlet of the process steam equipment.

[0020] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0021] This utility model's waste heat recovery system for thermal oil solves the problem of overheating of thermal oil in the workshop, releasing workshop capacity and improving production efficiency. The heat source utilizes high-temperature thermal oil for heat exchange, fully utilizing the thermal energy of the oil to generate steam, enriching the utilization methods of thermal oil heat energy, improving thermal energy utilization efficiency, and simultaneously creating economic value from the generated steam. Using steam condensate as the medium for steam generation fully utilizes the latent heat of the steam condensate, improving the problem of only collecting steam condensate without corresponding waste heat recovery processes, thus improving thermal energy utilization capacity and reducing production costs. Under certain conditions, the generated steam can meet the gas needs of the production line, breaking the workshop's reliance on steam from a thermal power plant, opening up new steam sources, providing steam security, and improving production stability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of existing technology;

[0023] Figure 2 This is a schematic diagram of the basic structure of the heat transfer oil waste heat recovery system in one embodiment of the present invention;

[0024] The reference numerals in the figure include:

[0025] 1. Switch valve; 2. Heat medium cooler; 3. First pneumatic switch valve; 4. Condensate tank; 5. First water supply pump; 6. Conductivity monitoring component; 7. Second pneumatic switch valve; 8. Third pneumatic switch valve; 9. Evaporation water supply tank; 10. Second water supply pump; 11. Heat transfer oil steam generator; 12. First pneumatic regulating valve; 13. Second pneumatic regulating valve; 14. Third pneumatic regulating valve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0029] Example

[0030] This embodiment provides a heat transfer oil waste heat recovery system, including: a condensate water tank 4, an evaporation makeup water tank 9, and a heat transfer oil steam generator 11;

[0031] The first inlet pipe of the condensate water tank 4 is connected to a condensate water supply system, and a first pneumatic switch valve 3 is provided between the condensate water supply system and the first inlet of the condensate water tank 4. The outlet of the condensate water tank 4 is connected to the second inlet of the condensate water tank 4 and the inlet pipe of the evaporation makeup water tank 9. A first makeup water pump 5 and a conductivity monitoring component 6 are provided between the outlet of the condensate water tank 4 and the second inlet of the condensate water tank 4 and the inlet of the evaporation makeup water tank 9. A second pneumatic switch valve 7 is provided between the conductivity monitoring component 6 and the second inlet of the condensate water tank 4, and a third pneumatic switch valve 8 is provided between the conductivity monitoring component 6 and the inlet of the evaporation makeup water tank 9. The outlet of the evaporation makeup water tank 9 is connected to the first inlet pipe of the heat transfer oil steam generator 11. A second water supply pump 10 is provided between the outlet of the evaporation water tank 9 and the first inlet of the thermal oil steam generator 11; the second inlet pipeline of the thermal oil steam generator 11 is connected to a thermal oil inlet system, and a first pneumatic regulating valve 12 is provided between the thermal oil inlet system and the second inlet of the thermal oil steam generator 11; the first outlet of the thermal oil steam generator 11 is connected to a process steam equipment pipeline, and the second outlet pipeline of the thermal oil steam generator 11 is connected to a thermal oil return system; a second pneumatic regulating valve 13 is provided between the first outlet of the thermal oil steam generator 11 and the process steam equipment; the inlet of the process steam equipment is also connected to a thermal power plant steam transmission system, and a third pneumatic regulating valve 14 is provided between the thermal power plant steam transmission system and the inlet of the process steam equipment.

[0032] The working principle is as follows: Opening the first pneumatic switch valve 3 allows condensate from the condensate system to flow into the condensate tank 4. The first makeup water pump 5 extracts the condensate from the condensate tank 4, and the conductivity monitoring component 6 analyzes the water quality. If the water quality is substandard, the second pneumatic switch valve 7 is opened, allowing the condensate to return to the condensate tank 4. The first makeup water pump 5 is then shut off, and the condensate in the condensate tank 4 is treated. If the water quality is acceptable, the third pneumatic switch valve 8 is opened, allowing the condensate to enter the evaporation makeup water tank 9. The second makeup water pump 10 then pumps the condensate into the shell side of the heat transfer oil steam generator 11. The first pneumatic regulating valve 12 is then opened to... The heat transfer oil in the hot oil system is fed into the tube side of the heat transfer oil steam generator 11. The heat transfer oil heats the condensate to generate steam. The steam pressure is controlled. When the generated steam pressure is higher than that of the power plant steam, the second pneumatic regulating valve 13 is opened. Since the generated steam pressure is higher than that of the power plant steam, and the downstream process steam-using equipment will generate a pressure difference, the generated steam can be successfully connected to the grid and transported to the downstream steam-using equipment together with the power plant steam. When the downstream process steam-using equipment is not in use or the steam consumption is low, the third pneumatic regulating valve 14 can be closed to cut off the external power plant steam, and the steam generated by the heat transfer oil steam generator 11 can be supplied independently.

[0033] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste heat recovery system for heat transfer oil, characterized in that, include: Condensate tank (4), evaporation makeup water tank (9), and heat transfer oil steam generator (11); The first inlet of the condensate water tank (4) is connected to a condensate water supply system, and the outlet of the condensate water tank (4) is connected to the second inlet of the condensate water tank (4) and the inlet of the evaporation makeup water tank (9); the outlet of the evaporation makeup water tank (9) is connected to the first inlet of the thermal oil steam generator (11); the second inlet of the thermal oil steam generator (11) is connected to a thermal oil inlet system; the first outlet of the thermal oil steam generator (11) is connected to a process steam equipment, and the second outlet of the thermal oil steam generator (11) is connected to a thermal oil return system. All connections are pipe connections.

2. The heat transfer oil waste heat recovery system according to claim 1, characterized in that, A first pneumatic switch valve (3) is provided between the condensate water supply system and the first inlet of the condensate water tank (4).

3. The heat transfer oil waste heat recovery system according to claim 1, characterized in that, A first water supply pump (5) and a conductivity monitoring component (6) are provided between the outlet of the condensate water tank (4), the second inlet of the condensate water tank (4), and the inlet of the evaporation water supply tank (9).

4. The heat transfer oil waste heat recovery system according to claim 3, characterized in that, A second pneumatic switch valve (7) is provided between the conductivity monitoring component (6) and the second inlet of the condensate tank (4), and a third pneumatic switch valve (8) is provided between the conductivity monitoring component (6) and the inlet of the evaporation water supply tank (9).

5. The heat transfer oil waste heat recovery system according to claim 1, characterized in that, A second water supply pump (10) is provided between the outlet of the evaporation water supply tank (9) and the first inlet of the heat transfer oil steam generator (11).

6. The heat transfer oil waste heat recovery system according to claim 1, characterized in that, A first pneumatic regulating valve (12) is provided between the heat transfer oil inlet system and the second inlet of the heat transfer oil steam generator (11).

7. The heat transfer oil waste heat recovery system according to claim 1, characterized in that, A second pneumatic regulating valve (13) is provided between the first outlet of the heat transfer oil steam generator (11) and the process steam equipment.

8. The heat transfer oil waste heat recovery system according to claim 1, characterized in that, The inlet of the process steam equipment is also connected to a thermal power plant steam transmission system, and a third pneumatic regulating valve (14) is provided between the thermal power plant steam transmission system and the inlet of the process steam equipment.

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