Energy-saving layer heat energy transformation device of evapo-separated machine

Abstract

The utility model relates to the technical field of heat energy recycling, and discloses a heat energy transformation device for an energy-saving layer of an evapo-separated machine. The technical problems that in the prior art, heat energy recovery efficiency is limited, energy consumption is high, and adaptability is poor are solved. The device comprises a stripping tower pre-condenser, and a water outlet of the stripping tower pre-condenser is connected with a ninth layer of jacket of the DT through a pretreatment water return pipeline so as to absorb heat of materials to heat a tempering tower; a carbon steel pipeline is arranged at the position, close to the ninth-layer jacket of the DT, of the pretreatment water return pipeline, an inlet of the carbon steel pipeline is connected with a DT-9 drainage pipeline, the outlet end of the carbon steel pipeline is connected with a DT-9 steam pipeline, two switching valves are arranged at the end of the carbon steel pipeline so as to achieve switching use of water and steam in the pipeline, and a bypass valve is arranged on the pretreatment water return pipeline so as to adjust the flow in the pipeline. According to the utility model, the recovery rate and the utilization efficiency of heat energy are improved, the energy consumption and the maintenance cost of the system are reduced, and remarkable economic benefits and environmental protection benefits are achieved.

Description

Technical Field

[0001] This utility model relates to the field of heat energy recovery and utilization technology, and in particular to a heat energy modification device for the energy-saving layer of an evaporator. Background Technology

[0002] Evaporators are pieces of equipment used in industrial production processes, primarily for heating, drying, or evaporating materials. In today's increasingly energy-constrained world, energy-saving retrofitting of existing equipment to improve energy efficiency and reduce energy consumption and emissions has become a key focus for many companies. For evaporators, installing energy-saving thermal retrofit devices can effectively improve their energy efficiency.

[0003] Chinese patent document 201720301972.3 discloses a heat energy utilization system for the drying layer of a steam dewatering machine, belonging to the field of soybean processing technology. This utility model aims to solve the problem of serious heat energy waste and low heat energy recovery and utilization rate in existing steam dewatering machines. The steam dewatering machine is equipped with a first drying layer, a second drying layer, and a cooling layer from top to bottom. A reducer and a motor are connected to the bottom of the steam dewatering machine. The exhaust ports of the first drying layer, the second drying layer, and the cooling layer are respectively connected to a first cyclone dust collector, a second cyclone dust collector, and a third cyclone dust collector via gas pipelines. The waste heat discharge port of the first cyclone dust collector is connected to the waste heat inlet of a waste heat trap via a waste heat gas pipeline. The waste heat outlet of the waste heat trap is connected to an induced draft fan. The waste heat trap is equipped with a fresh air inlet, which is connected to a fan via a fresh air pipeline.

[0004] However, the above-mentioned solutions have at least the following technical problems during implementation: limited heat recovery efficiency, resulting in some recoverable heat energy not being effectively utilized; high energy consumption, increased steam consumption, affecting energy-saving effects; and poor adaptability, making it difficult to adapt to different types of production needs when processing different materials. Therefore, there is an urgent need to propose a heat energy retrofit device for the energy-saving layer of the desiccant. Summary of the Invention

[0005] In view of the above technical problems, this disclosure provides a thermal energy retrofit device for the energy-saving layer of a steam degasser, which solves the technical problems of limited heat recovery efficiency in the prior art, resulting in some recoverable heat energy not being effectively utilized, high energy consumption, increased additional steam consumption, affecting energy-saving effect, poor adaptability, and difficulty in adapting to different types of production needs when processing different materials.

[0006] According to one aspect of this disclosure, an energy-saving thermal energy modification device for a stripper is provided, comprising a stripping tower pre-condenser. The inlet end of the stripping tower pre-condenser is connected to the upper layer of a conditioning tower via a pipeline pump, and the outlet end of the stripping tower is connected to the lower layer of the conditioning tower via a condensate tank and a condensate pump in sequence along its flow direction. The absorbed heat is used to heat the material inside the conditioning tower. The outlet of the stripping tower pre-condenser is connected to the DT ninth layer jacket via a pretreatment return water pipeline. A carbon steel pipeline is installed on the pretreatment return water pipeline near the DT ninth layer jacket. The inlet of the carbon steel pipeline is connected to the pretreatment return water pipeline, and the outlet end is connected to the DT ninth layer jacket via a DT-9 condensate pipeline. The pretreatment return water pipeline is connected to the DT ninth layer jacket via a DT-9 steam pipeline. The DT-9 steam pipeline is connected to the stripper to recover and utilize the heat energy of the material inside the DT-9 layer. A switching valve is installed at the end of the carbon steel pipeline to realize the switching use of water and steam in the pipeline. A bypass valve is installed on the pretreatment return water pipeline to regulate the flow rate in the pipeline.

[0007] In some embodiments of this disclosure, the switching valve includes a DN40PN16 flanged ball valve.

[0008] In some embodiments of this disclosure, the bypass valve includes a DN100PN16 flanged ball valve.

[0009] In some embodiments of this disclosure, pressure gauges and temperature gauges are installed on the pretreated return water pipeline.

[0010] In some embodiments of this disclosure, pressure gauges and temperature gauges are installed on the carbon steel pipe.

[0011] In some embodiments of this disclosure, the carbon steel pipe is a 62-meter DN40PN16 seamless carbon steel pipe.

[0012] The beneficial effects of this invention are as follows: The condensate from the pre-condenser absorbs the heat energy of the materials inside the DT-9 layer, which is then used to heat the conditioning tower in subsequent processes, thereby improving the heat recovery rate. Using the recovered high-temperature water to replace part of the external heat source reduces energy consumption. Through the pre-treated return water pipeline, the condensate can more effectively absorb the heat from the materials, improving heat transfer efficiency. The seamless carbon steel pipe has excellent high-temperature and high-pressure resistance, making it suitable for use in high-temperature and high-pressure environments, ensuring the safety and reliability of the system. It reduces the risk of leakage and improves the system's sealing performance. Switching valves are installed at both ends of the carbon steel pipe, allowing switching between water and steam as needed, increasing the system's flexibility. The bypass valve can regulate the flow rate in the pipeline, ensuring stable operation of the system under different operating conditions and preventing excessive pressure in the pipeline, protecting the system from damage. Reasonable flow rate adjustment can optimize the heat transfer process and improve the overall efficiency of the system. Pressure gauges and thermometers can monitor the pressure and temperature in the pipeline in real time, ensuring the normal operation of the system. Real-time data allows for timely detection of system anomalies, enabling proactive measures to prevent malfunctions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the thermal energy modification device for the energy-saving layer of an evaporator.

[0014] Figure 2 This is a schematic diagram showing the connection relationship between the conditioning tower and the stripping tower pre-condenser;

[0015] The components in the diagram are as follows: 1. Stripping tower pre-condenser; 2. Pretreatment return water pipeline; 3. DT ninth layer jacket; 4. Conditioning tower; 5. Carbon steel pipeline; 6. DT-9 condensate pipeline; 7. DT-9 steam pipeline; 8. Switching valve; 9. Bypass valve; 10. Steam indirect steam from the stripper; 11. Pipeline pump; 12. Upper layer of conditioning tower; 13. Condensate tank; 14. Condensate pump; 15. Lower layer of conditioning tower. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Example 1

[0017] This example discloses a thermal energy retrofit device for the energy-saving layer of an evaporator. (See also...) Figures 1 to 2The system includes a stripping tower pre-condenser 1, whose outlet is connected to the DT ninth layer jacket 3 via a pretreatment return water pipe 2 to absorb heat from the material and heat the conditioning tower 4; a carbon steel pipe 5 is installed on the pretreatment return water pipe 2 near the DT ninth layer jacket 3, the inlet of the carbon steel pipe 5 is connected to the DT-9 condensate pipe 6, and the outlet is connected to the DT-9 steam pipe 7; two switching valves 8 are installed at the end of the carbon steel pipe 5 to switch between water and steam in the pipe; a bypass valve 9 is installed on the pretreatment return water pipe 2 to regulate the flow rate in the pipe.

[0018] The system includes a stripping tower pre-condenser 1. The tube side inlet of the stripping tower pre-condenser is connected to the upper layer 12 of the conditioning tower via a pipeline pump 11, and the tube side outlet is connected to the lower layer 15 of the conditioning tower via a condensate tank 13 and a condensate pump 14 in sequence, to absorb heat from the gas and heat the conditioning tower. The tube side outlet of the stripping tower pre-condenser is connected to the DT ninth layer jacket 3 via a pretreatment return water pipeline 2. A carbon steel pipeline 5 is installed on the pretreatment return water pipeline 2 near the DT ninth layer jacket 3. The inlet of the carbon steel pipeline 5 is connected to the pretreatment return water pipeline 2, and the outlet is connected to the DT ninth layer jacket 3 via a DT-9 condensate pipeline 6. The pretreatment return water pipeline 2 is connected to the DT ninth layer jacket 3 via a DT-9 steam pipeline 7. The DT-9 steam pipeline 7 is connected to the steam indirect steam 10 of the desiccant to recover the heat energy of the material inside the DT-9 layer. A switching valve 8 is installed at the end of the carbon steel pipeline 5 to switch between water and steam in the pipeline. A bypass valve 9 is installed on the pretreatment return water pipeline 2 to regulate the flow rate in the pipeline.

[0019] Switching valve 8 includes a DN40PN16 flanged ball valve.

[0020] Bypass valve 9 includes a DN100PN16 flanged ball valve.

[0021] A pressure gauge and a temperature gauge are installed on the pre-treated return water pipe 2.

[0022] Pressure gauges and temperature gauges are installed on carbon steel pipe 5.

[0023] Carbon steel pipe 5 is a 62-meter DN40PN16 seamless carbon steel pipe.

[0024] During operation, the stripping tower pre-condenser 1 is used to initially recover the high-temperature mixed gas generated during stripping. The condensate, after being cooled by the pre-condenser, still maintains a high temperature. The high-temperature condensate flows out from the outlet of the stripping tower pre-condenser 1 and enters the pretreatment return water pipeline 2. The pretreatment return water pipeline 2 transports the high-temperature condensate to the DT ninth-layer jacket 3. Pressure gauges and thermometers on the pretreatment return water pipeline 2 monitor the pressure and temperature within the pipeline in real time to ensure normal system operation. The DT ninth-layer jacket 3 performs heat exchange; after entering the jacket, the high-temperature condensate absorbs heat from the material, which is used to heat the conditioning tower 4, increasing the temperature of the conditioning tower and thus improving production efficiency. Heat in the DT-9 layer material is recovered through carbon steel pipeline 5. Pressure gauges and thermometers on the carbon steel pipeline 5 monitor the parameters within the pipeline in real time to ensure safe system operation. Switching valve 8 switches the pipeline between water and steam. When high-temperature water is needed, switching valve 8 switches the pipeline to the water path; when steam is needed, switching valve 8 switches the pipeline to the steam path. To meet different operating conditions, the flow of water into the ninth jacket 3 of the DT system is controlled by adjusting the bypass valve 9, ensuring stable operation of the system under various conditions. The bypass valve 9 also prevents excessive pressure in the pipeline, protecting the system from damage.

[0025] Implementation details: A portion of the water effluent from the stripping tower pre-condenser is connected to the ninth jacket of the DT tower, where it absorbs heat from the material and is then used for heating in the conditioning tower.

[0026] Implementation plan: A DN40 carbon steel pipe (entering from the DT-9 drain pipe and exiting from the DT-9 steam pipe) will be branched off from the pre-condenser to the pre-treatment return water pipe at the closest point to DT. Two DN40 flanged ball valves will be added to ensure that water and steam can be switched. At the same time, a DN100 flanged ball valve will be added to the original return water pipe as a bypass valve to regulate the water flow to DT. A set of pressure gauges and thermometers will be added to the inlet and outlet water pipes.

[0027] Necessity: The heat absorbed from the DT-9 material is used for heating the conditioning tower. It is estimated that the heat absorbed is equivalent to 1.2 kg of soybeans per ton. This is an energy-saving renovation and is very necessary.

[0028] Feasibility: There is room for modification on site. The expected goal can be achieved by adding one DN100 flanged ball valve and two DN40 flanged ball valves and related pipelines. Therefore, it is feasible.

[0029] Main materials used: 62 meters of DN40PN16 carbon steel seamless pipe, 6 stamped elbows, 2 flanged ball valves, 8 flanges, 1 DN100PN16 flanged ball valve, 2 flanges, 2 sets of 16 kg pressure gauges and gauge bases, 2 sets of 150 degree temperature gauges and gauge bases, 4 DN15 needle valves, and 32 sets of M16 bolts.

[0030] Estimated cost: approximately RMB 19,000, including labor and insulation.

[0031] Risks during implementation: No dissolution operations are performed in the leaching workshop; handle with care to prevent sparks; pipeline installation requires working at heights; take precautions to prevent falls and injuries; when connecting hot water pipelines, ensure the medium is drained to prevent scalding.

[0032] Post-operation risk: If the moisture content of the soybean meal is high and difficult to reduce, it is necessary to switch to steam heating in a timely manner.

[0033] Expected results: It is estimated that the heat absorbed is equivalent to 1.2 kg of soybeans per ton. Based on an annual soybean processing capacity of 750,000 tons, and conservatively calculated at 60%, the annual amount is equivalent to RMB 125,800.

[0034] Investment payback period: 1.9 / 12.58 = 0.15 years.

[0035] Data statistics:

[0036]

[0037]

[0038] The modification actually added a water bypass, but did not absorb the heat from the steam.

[0039] Because the existing steam pipes in the workshop are easy to connect (the pipe diameter is suitable and the distance is short), we connected them to the steam pipes (DT, 9th floor).

[0040] The original design of the DT-9 steam pipeline was to heat the materials inside the equipment and remove moisture. However, the materials being processed now have low moisture content and do not require dehydration, so this layer is essentially useless. But the material temperature is high, and water can absorb heat and make full use of it.

[0041] Because water enters at a lower elevation and exits at a higher elevation, it can fully exchange heat with the material (indirect contact) and absorb the material's temperature. First connect the DT-9 condensate drain pipe, then connect the DT-9 steam pipe.

[0042] Although some preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0043] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A thermal energy retrofit device for an energy-saving layer of an evaporator, characterized in that: The system includes a stripping tower pre-condenser. The inlet end of the stripping tower pre-condenser is connected to the upper layer of the conditioning tower via a pipeline pump, and the outlet end is connected to the lower layer of the conditioning tower via a condensate tank and a condensate pump along its flow direction. This absorbs heat from the material to heat the conditioning tower. The outlet of the stripping tower pre-condenser is connected to the DT ninth-layer jacket via a pretreatment return water pipeline. A carbon steel pipeline is installed on the pretreatment return water pipeline near the DT ninth-layer jacket. The inlet of the carbon steel pipeline is connected to the pretreatment return water pipeline, and the outlet end is connected to the DT ninth-layer jacket via a DT-9 condensate pipeline. The pretreatment return water pipeline is connected to the DT ninth-layer jacket via a DT-9 steam pipeline to recover and utilize the heat from the material. The DT-9 steam pipeline is connected to a descaling machine. A switching valve is installed at the end of the carbon steel pipeline to switch between water and steam within the pipeline. A bypass valve is installed on the pretreatment return water pipeline to regulate the flow rate within the pipeline.

2. The thermal energy retrofit device for the energy-saving layer of the desiccant as described in claim 1, characterized in that: The switching valve includes a DN40PN16 flanged ball valve.

3. The thermal energy retrofit device for the energy-saving layer of the evaporator as described in claim 1, characterized in that: The bypass valve includes a DN100PN16 flanged ball valve.

4. The thermal energy retrofit device for the energy-saving layer of the desiccant as described in claim 1, characterized in that: Pressure gauges and temperature gauges are installed on the pretreated return water pipeline.

5. The thermal energy retrofit device for the energy-saving layer of the evaporator as described in claim 1, characterized in that: Pressure gauges and temperature gauges are installed on the carbon steel pipe.

6. The thermal energy retrofit device for the energy-saving layer of the desiccant as described in claim 1, characterized in that: The carbon steel pipe is a 62-meter DN40PN16 seamless carbon steel pipe.

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