Heat energy recovery system of oil puffing device

Abstract

The utility model discloses a heat energy recovery system of an oil bulking device, which comprises a bulking machine connected with a blank sheet material pipeline, and a discharge port of the bulking machine is sequentially connected with a bulking heat energy recovery box and a bulking cold drying box through a pipeline; and a discharge port of the puffing cold drying box is connected to the invasion scraper through a pipeline. A gas phase outlet of the bulking machine is connected with a hot side inlet of the heat energy recovery heat exchanger; a hot side outlet of the heat energy recovery heat exchanger is sequentially connected to the heat energy recovery fan and the energy-saving heat exchanger through pipelines; and a hot side outlet at one end of the energy-saving heat exchanger is connected with an emptying pipeline or a VOCS tail gas treatment system. The heat energy recovery system of the oil puffing device is used for separating a high-quality heat source from low-quality waste heat in the pretreatment / leaching process of oil and recycling the high-quality heat source, so that steam consumption can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of oil processing, specifically to a heat recovery system for an oil puffing device. Background Technology

[0002] In the oil production process, before oil extraction, oilseeds undergo a series of pretreatments, including cleaning, moisture adjustment, shelling, peeling, crushing, softening, rolling, expansion, cooling, and drying. The purpose of oilseed pretreatment is to remove impurities and process the oilseeds into materials with specific structural properties to meet the requirements of different oil extraction processes.

[0003] Oilseed puffing and cooling / drying of the puffed material are the final steps in oilseed pretreatment. Puffing involves extruding the oilseed under high temperature and pressure, disrupting its cell structure, creating a loose structure, and releasing the oil. This improves solvent permeability during subsequent leaching, accelerating the leaching process and increasing the yield of crude oil. Cooling / drying ensures suitable temperature and humidity for the leaching material. Typically, the initial moisture content of the puffed material is 11-13%, and the initial temperature is 110-120℃, while the suitable leaching moisture content is approximately 8-10%, and the temperature is 58-62℃.

[0004] Existing technologies for cooling and drying extruded materials generate a large amount of low-quality waste heat, which is often not fully recovered and utilized. This is because traditional oil extrusion devices typically use a single extrusion cooling box to dry and cool the extruded material, producing a large amount of low-temperature, low-humidity hot air. This hot air can only be used to heat the fresh air used in the extrusion cooling box, and the heat exchange efficiency is very low. The hot air after heat exchange is directly discharged into the atmosphere, thus wasting a significant amount of heat energy.

[0005] The aforementioned problems contradict the national energy conservation and emission reduction goals and have always been one of the most prominent issues in waste heat recovery and utilization in traditional pretreatment-leaching workshops. Utility Model Content

[0006] Therefore, the technical problem to be solved by this utility model is to provide a heat recovery system for an oil extrusion device that is low in cost and simple in structure, in order to address the shortcomings of the existing technology.

[0007] The technical solution of this utility model is a heat energy recovery system for an oil extrusion device. The recovery system includes: a raw material pipeline, an extruder connected to the raw material pipeline, and an extrusion heat energy recovery box and an extrusion cold drying box connected in sequence to the outlet of the extruder through a pipeline; the outlet of the extrusion cold drying box is connected to an intrusion scraper through a pipeline.

[0008] The gas phase outlet of the extruder is connected to the hot side inlet of the heat recovery heat exchanger; the hot side outlet of the heat recovery heat exchanger is connected in sequence to the heat recovery fan and the energy-saving heat exchanger through a pipeline, and one end of the hot side outlet of the energy-saving heat exchanger is connected to the venting pipeline or to the VOCs exhaust gas treatment system.

[0009] A heat recovery system for an oil puffing device, wherein the heat recovery fan is connected to one end of the hot-side inlet of an energy-saving heat exchanger.

[0010] A heat recovery system for an oil puffing device, wherein the cold-side inlet of the energy-saving heat exchanger is connected to a fresh air duct, and its cold-side outlet is connected to the gas phase inlet of the puffing cold drying box; the gas phase outlet of the puffing cold drying box is connected in sequence to a cyclone separator and a cold drying fan via a duct; the air outlet of the cold drying fan is vented through a duct or connected to a VOCs exhaust gas treatment system.

[0011] A heat recovery system for an oil extrusion device, wherein the feed inlet of the extruder is connected to a steam injection pipe.

[0012] A heat recovery system for an oil extrusion device, wherein the extrusion heat recovery box is connected to a fresh air supply pipe; and a supply air valve is provided on the fresh air supply pipe.

[0013] A heat recovery system for an oil extrusion device, wherein the interior of the extrusion heat recovery tank is equipped with a material distributor and a material gate. The material distributor is driven by a motor, and the material gate is driven by hydraulic pressure.

[0014] A heat recovery system for an oil extrusion apparatus, wherein the interior of the extrusion drying chamber is equipped with a material distributor and a discharge flap. The material distributor is driven by a motor, and the discharge flap is driven by hydraulic pressure.

[0015] A heat recovery system for an oil extrusion device, wherein the cold side of the heat recovery heat exchanger is connected to a hot water pipe. The hot water, after heating, is sent to a conditioning tower to heat and soften the oil or to other heat exchange equipment requiring hot water.

[0016] A heat recovery system for an oil extrusion device, wherein the other end of the energy-saving heat exchanger is connected to a condensate pipe on its hot side.

[0017] Furthermore, the bottom discharge port of the scythrone is connected to the intrusion scraper via a pipe.

[0018] The beneficial effects of the heat recovery system of the oil expansion device provided by this utility model:

[0019] (1) In this utility model system, the high-temperature puffed material passes through the puffing heat recovery box and the puffing cold drying box, where it undergoes mass and heat transfer with fresh air and hot air, respectively. Fresh air first enters the puffing heat recovery box, carrying away some of the heat and moisture from the high-temperature puffed material. Then, it enters the feed pipe of the puffing heat recovery box and forms convection with the high-temperature puffed material, further carrying away heat and moisture. Finally, it enters the top template of the puffing machine, where it flashes under high temperature and high pressure to form high-temperature and high-humidity high-quality hot air, which then serves as an important heat source for the oil pretreatment workshop. In contrast, in the traditional process, the high-temperature puffed material only passes through the puffing cold drying box, where a large amount of hot air carries away its heat and moisture, resulting in low-quality waste heat with much lower temperature and humidity compared to the hot air generated by this utility model. This waste heat cannot be fully recovered and utilized, leading to energy waste.

[0020] (2) The system of this utility model is equipped with a plate-type heat recovery heat exchanger, which is used for heat exchange between high-quality hot air and low-temperature hot water. The heated hot water can be used for heating the conditioning tower and softening oil or for other heat exchange equipment that requires hot water, thereby saving a lot of steam consumption.

[0021] (3) Compared with the prior art, the system of this utility model does not require a heat tracing coil for heat preservation. In this utility model, after the high-temperature expanded material passes through the expansion heat recovery box, some of the heat and moisture have been removed. When it passes through the expansion cold drying box, the hot air that exchanges mass and heat with it has a very low temperature and moisture content, making it difficult to condense. However, in the traditional process, the hot air from the expansion cold drying box contains a large amount of moisture. The water vapor condenses into small water droplets in the saccharin, which can easily cause the powder to clump and block the pipes, affecting the unloading of the saccharin. Therefore, a heat tracing coil must be installed on the saccharin.

[0022] This invention requires less new equipment, has a lower cost, and eliminates the need for the heat tracing coil in traditional processes. Therefore, both initial investment and subsequent operation and maintenance costs are lower. This invention separates a portion of the high-temperature, high-humidity, high-quality heat source from the large amount of low-quality waste heat generated in traditional processes, saving steam consumption and creating considerable and sustainable economic benefits. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a traditional oil extrusion device.

[0024] In the diagram, 1' is an extruder; 2' is an extrusion drying box; 3' is a cyclone separator; 4' is a refrigerated drying fan; and 5' is an energy-saving heat exchanger.

[0025] Figure 2 A schematic diagram of the heat recovery system of the oil extrusion device provided by this utility model.

[0026] Figure 3 This is a schematic diagram of the heat recovery heat exchanger of this utility model.

[0027] Figure 4 This is a schematic diagram of the energy-saving heat exchanger of this utility model.

[0028] In the diagram, 1 is the extruder; 2 is the extrusion heat recovery box; 3 is the extrusion cold drying box; 4 is the heat recovery heat exchanger; 5 is the heat recovery fan; 6 is the energy-saving heat exchanger; 7 is the cyclone separator; and 8 is the cold drying fan. Detailed Implementation

[0029] 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.

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0031] Figure 2 The specific connection method of the heat energy recovery system of the oil puffing device of this utility model is as follows:

[0032] The raw material pipeline is connected to the feed port of the extruder 1; the discharge port of the extruder 1 is connected to the inlet of the extrusion heat recovery box 2 through a thicker pipeline; the discharge port of the extrusion heat recovery box 2 is connected to the inlet of the extrusion cold drying box 3; the discharge port of the extrusion cold drying box 3 is connected to the intrusion scraper through a pipeline.

[0033] This heat recovery device is used in the oil pretreatment and leaching workshop. The intrusion scraper is a conveying device that transports the pretreated oil from the pretreatment workshop to the leaching workshop.

[0034] The gas phase outlet of the extruder 1 is connected to the hot side inlet of the heat recovery heat exchanger 4; the hot side outlet of the heat recovery heat exchanger 4 is connected to the air inlet of the heat recovery fan 5; the air outlet of the heat recovery fan 5 is connected to one end of the hot side inlet of the energy-saving heat exchanger 6 through a pipeline, and one end of the hot side outlet of the energy-saving heat exchanger 6 is vented through a pipeline or connected to the VOCs exhaust gas treatment system (the same end of the hot side outlet of the energy-saving heat exchanger 6 is vented through a pipeline or connected to the VOCs exhaust gas treatment system).

[0035] An air duct is connected to the cold-side inlet of the energy-saving heat exchanger 6, and the cold-side outlet of the energy-saving heat exchanger 6 is connected to the gas phase inlet of the expanded refrigerated drying box 3 via a duct. The gas phase outlet of the expanded refrigerated drying box 3 is connected to the inlet of the scythron 7 via a duct. The outlet of the scythron 7 is connected to the air inlet of the refrigerated drying fan 8. The air outlet of the refrigerated drying fan 8 is vented through a duct or connected to the VOCs exhaust gas treatment system.

[0036] The extruder 1 is equipped with a steam injection pipe with a steam pressure of 5 to 8 bar.

[0037] The puffing heat energy recovery box 2 is connected to a fresh air supply pipe, and a supply air valve is installed on the pipe.

[0038] The interior of the puffing heat recovery box 2 is equipped with a material distributor driven by a motor and a material gate driven by hydraulic pressure.

[0039] The interior of the puffing and drying box 3 is equipped with a material distributor driven by a motor and a discharge flap driven by hydraulic pressure.

[0040] The cold-side inlet of the heat recovery heat exchanger 4 is connected to a low-temperature hot water pipe from the conditioning tower, and the cold-side outlet of the heat recovery heat exchanger 4 is connected to a high-temperature hot water pipe leading to the conditioning tower. Other heat exchange equipment requiring hot water can also be connected to the cold side of the heat recovery heat exchanger 4. For example... Figure 3 As shown, the heat recovery heat exchanger 4 has hot side inlet and outlet on the left and right sides respectively; the arrows below indicate cold side inlet and outlet. Cold water with a lower temperature enters, is heated, and then goes to the section that needs hot water.

[0041] The other end of the energy-saving heat exchanger 6 has a hot-side inlet connected to a high-temperature condensate pipe from the workshop, and a hot-side outlet connected to a low-temperature condensate pipe leading to a cooling tower. For example... Figure 4 As shown, the energy-saving heat exchanger 6 has two hot sides, each with an inlet and outlet (the four pipes at the top and bottom are the two hot sides), and one cold side with a set of inlets and outlets. Air enters from the right cold side and exits from the left cold side, entering the expansion refrigerated drying chamber.

[0042] The bottom discharge port of the Shakron 7 is connected to the intrusion scraper via a pipe.

[0043] The process flow of the heat recovery system of the oil extrusion device of this utility model is as follows:

[0044] The raw material is forcibly and evenly fed into the extruder by a screw conveyor. Under the injection of direct steam at 5-8 bar, the material undergoes thorough mixing, heating, pressurization, bonding, and gelatinization, forming a high-temperature extruded material with a porous structure, a temperature of 100℃-105℃, and a moisture content of 11.5%-12.5%. The high-temperature extruded material first enters the extrusion heat recovery box, where it is evenly distributed onto the material gate by a material distributor and undergoes mass and heat transfer with fresh air entering through the make-up air pipe, resulting in a decrease in temperature and moisture content. The extruded material then enters the extrusion cold drying box, where it is again evenly distributed onto the flaps by a material distributor and cooled and dried by hot air to a temperature of 50℃-60℃ and a moisture content of 9%-10%, before being extracted by the leaching scraper.

[0045] Fresh air entering the extrusion heat recovery box carries away some of the heat and moisture from the high-temperature extruded material, forming hot air. This hot air then convections with the high-temperature extruded material entering the heat recovery box in the discharge pipe of the coarser extruder, further absorbing heat and moisture from the material. As the temperature and moisture content rise, the hot air then enters the top mold of the extruder, where it flashes under high temperature and pressure to form high-temperature, high-humidity, high-quality hot air. This high-quality hot air enters the heat recovery heat exchanger to exchange heat with low-temperature hot water. The heated low-temperature hot water can then be used for heating in the conditioning tower and softening oil, or sent to other heat exchange equipment requiring hot water. The hot air is then cooled to 55℃~65℃ and transported by the heat recovery fan to the energy-saving heat exchanger to heat fresh air. At this point, the temperature of the hot air is further reduced to 45℃~55℃ before being vented through pipes or connected to the VOCs exhaust gas treatment system.

[0046] Fresh air entering the energy-saving heat exchanger is heated by hot air and then further heated by high-temperature condensate, raising its temperature to 55℃~70℃ before entering the expansion and drying chamber from the bottom to dry and cool the expanded material. The resulting low-temperature hot air has a temperature of only 40℃~50℃ and a low moisture content, making it unusable for recycling. The low-temperature hot air is discharged from the top of the expansion and drying chamber to the scyphozotron, and then vented through pipes by a refrigerated drying fan or connected to a VOCs exhaust gas treatment system. The powder in the low-temperature hot air exits from the bottom of the scyphozotron to the leaching scraper for oil extraction.

[0047] The number of devices and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications and variations of this utility model will be obvious to those skilled in the art.

[0048] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A heat recovery system for an oil extrusion device, characterized in that: The recycling system includes: a raw material pipeline, an extruder (1) connected to the raw material pipeline, and an extrusion heat recovery box (2) and an extrusion cold drying box (3) connected in sequence to the outlet of the extruder (1) through a pipeline; the outlet of the extrusion cold drying box (3) is connected to an intrusion scraper through a pipeline. The gas phase outlet of the extruder (1) is connected to the hot side inlet of the heat recovery heat exchanger (4); the hot side outlet of the heat recovery heat exchanger (4) is connected in sequence to the heat recovery fan (5) and the energy-saving heat exchanger (6) through a pipeline, and one end of the hot side outlet of the energy-saving heat exchanger (6) is connected to the exhaust pipeline or to the VOCs exhaust gas treatment system.

2. The heat recovery system of the oil extrusion device according to claim 1, characterized in that: The heat recovery fan (5) is connected to the hot side inlet of one end of the energy-saving heat exchanger (6).

3. The heat recovery system of the oil extrusion device according to claim 1, characterized in that: The cold-side inlet of the energy-saving heat exchanger (6) is connected to a fresh air duct, and its cold-side outlet is connected to the gas phase inlet of the expanded cold drying box (3); the gas phase outlet of the expanded cold drying box (3) is connected in sequence to a scissor (7) and a cold drying fan (8) through a pipe; the air outlet of the cold drying fan (8) is vented through a pipe or connected to the VOCs exhaust gas treatment system.

4. The heat recovery system of the oil extrusion device according to claim 1, characterized in that: The feed inlet of the extruder (1) is connected to a steam injection pipe.

5. The heat recovery system of the oil extrusion device according to claim 1, characterized in that: The puffing heat energy recovery box (2) is connected to a fresh air supply pipe; the fresh air supply pipe is equipped with a supply air valve.

6. The heat recovery system of the oil extrusion device according to claim 1, characterized in that: The puffing heat recovery box (2) is equipped with a material distributor and a material gate inside.

7. The heat recovery system of the oil extrusion device according to claim 1, characterized in that: The interior of the puffing cold drying box (3) is equipped with a material distributor and a discharge flap.

8. The heat recovery system of the oil extrusion device according to claim 1, characterized in that: The cold side of the heat recovery heat exchanger (4) is connected to a hot water pipe.

9. The heat recovery system of the oil extrusion device according to claim 1, characterized in that: The other end of the energy-saving heat exchanger (6) is connected to a condensate pipe on the hot side.

10. The heat recovery system of the oil extrusion device according to claim 3, characterized in that: The bottom discharge port of the saxophone (7) is connected to the intrusion scraper via a pipe.

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