Resource recovery equipment and methods for oil-containing diatomite

Abstract

This invention relates to the field of solid waste treatment technology, and provides a resource recovery device and method for oily diatomaceous earth. The resource recovery device for oily diatomaceous earth includes a feeding unit, a distillation and separation unit, and a recovery unit connected together. The feeding unit is used to transport the oily diatomaceous earth to the distillation and separation unit; the distillation and separation unit is used to distill and separate the oily diatomaceous earth and perform rectification and upgrading to obtain target rolling oil, diatomaceous earth slag, and waste; the recovery unit is used to recover the target rolling oil, diatomaceous earth slag, and waste separately. This invention can achieve effective separation and recycling of rolling oil and diatomaceous earth in oily diatomaceous earth, reducing resource waste and environmental pollution.

Description

Technical Field

[0001] This invention relates to the field of solid waste treatment technology, and in particular to a resource-based treatment device and method for oil-containing diatomaceous earth. Background Technology

[0002] Diatomaceous earth is typically light yellow or light gray in color and is commonly used industrially as a filter aid, filler, decolorizing agent, and catalyst carrier. Currently, diatomaceous earth filter aids are widely used in the brewing, chemical, and water treatment industries.

[0003] Because of its loose, porous structure, diatomaceous earth has good filtration properties and is often used as a filter for rolling oil in aluminum rolling. Rolling oil is mainly composed of base oil and additives. When using diatomaceous earth as a filter aid to filter rolling oil, some oil, aluminum shavings, dust, and oil residue remain in the diatomaceous earth, forming oily diatomaceous earth. Waste oily diatomaceous earth typically contains about 25%-30% rolling oil, posing a significant environmental pollution risk and is often managed as hazardous waste. Recycling the oil in oily diatomaceous earth and regenerating de-oiled diatomaceous earth are important aspects of solid waste resource utilization and the circular economy. It is worth noting that the production of diatomaceous earth filter aids generally uses high-quality diatomaceous earth with a high diatom content, and high-quality diatomaceous earth is relatively expensive. Acid washing is usually used to extract rolling oil from diatomaceous earth; however, acid washing has many drawbacks, such as product quality problems and significantly shortened equipment lifespan after the rolling mill uses acid-containing recycled oil; acid-containing waste diatomaceous earth can also cause secondary pollution. Therefore, it is essential to develop a device and method for recovering oil from oil-containing diatomaceous earth to achieve its resource utilization. Summary of the Invention

[0004] This invention provides a resource-based treatment device and method for oil-containing diatomaceous earth, which addresses the shortcomings of existing technologies, enables the effective separation and recycling of rolling oil and diatomaceous earth in oil-containing diatomaceous earth, reduces resource waste and environmental pollution.

[0005] This invention provides a resource recovery device for oil-containing diatomaceous earth, comprising:

[0006] The interconnected feeding unit, distillation and separation unit, and recovery unit, among which,

[0007] The feeding unit is used to transport oil-containing diatomaceous earth to the distillation and separation unit;

[0008] The distillation and separation unit is used to distill and refine the oil-containing diatomite to obtain the target rolling oil, diatomite residue and waste.

[0009] The recycling unit is used to recycle the target rolling oil, the diatomaceous earth slag, and the waste, respectively.

[0010] According to the present invention, a resource recovery device for oil-containing diatomite is provided, wherein the distillation separation unit comprises:

[0011] A heated still is connected to the feeding unit, which is used to transport the oil-containing diatomaceous earth into the heated still for distillation to obtain rolled oil vapor and the diatomaceous earth residue.

[0012] The first condenser, connected to the heating distillation apparatus, is used to perform a first condensation and separation of the rolling oil vapor to obtain a first liquid rolling oil and a first waste gas;

[0013] A distillation unit, connected to the first condenser, is used to distill the first liquid rolling oil to obtain gaseous rolling oil and waste residue.

[0014] The second condenser, connected to the distillation unit, is used to perform a second condensation and separation of the gaseous rolling oil to obtain a second liquid rolling oil and a second waste gas.

[0015] Wherein, the second liquid rolling oil is the target rolling oil, and the waste includes the first waste gas, the second waste gas, and the waste residue.

[0016] According to the present invention, a resource recovery device for oil-containing diatomaceous earth is provided, wherein the heating distillation apparatus comprises:

[0017] The distillation chamber, connected to the feeding unit, is used to distill the oil-containing diatomaceous earth to obtain the rolling oil vapor and the diatomaceous earth residue.

[0018] A hot gas supply chamber is connected to the distillation chamber via a first hot gas supply pipe and is used to heat the distillation chamber.

[0019] A storage chamber, connected between the distillation chamber and the first condenser, is used to store the rolling oil vapor.

[0020] According to the present invention, a resource recovery device for oily diatomite is provided, wherein the distillation chamber is connected to the recovery unit via a slag discharge pipe, and the slag discharge pipe is used to transport the diatomite slag to the recovery unit;

[0021] The hot gas supply chamber is connected to the storage chamber via a second hot gas supply pipe, and the second hot gas supply pipe is connected to the slag discharge pipe. The second hot gas supply pipe is equipped with a nozzle, which is used to spray hot gas from the hot gas supply chamber onto the diatomaceous earth slag in the slag discharge pipe, so as to distill out the rolling oil carried by the diatomaceous earth slag and send it into the storage chamber.

[0022] According to the present invention, a resource recovery device for oily diatomaceous earth is provided, wherein the distillation chamber is provided with a slag discharge port connected to the slag discharge pipe, the slag discharge pipe is provided with a collection box, the collection box is located between the slag discharge port and the nozzle, and the collection box is provided with a slag inlet adjacent to the slag discharge port and a slag outlet adjacent to the nozzle, the slag inlet is provided with a first valve, and the slag outlet is provided with a second valve.

[0023] According to the present invention, a resource recovery device for oily diatomaceous earth is provided, wherein a filter screen is provided at the connection between the second hot gas supply pipe and the storage chamber.

[0024] According to the present invention, a resource recovery device for oil-containing diatomaceous earth is provided, wherein the distillation chamber comprises:

[0025] The distillation chamber has a hollow interlayer, and the hot gas supply chamber is connected to the hollow interlayer via the first hot gas supply pipe;

[0026] A mixer, including a spiral stirring blade disposed within the distillation chamber.

[0027] According to the present invention, a resource recovery device for oil-containing diatomite is provided, wherein the feeding unit comprises:

[0028] A vacuum feeder is connected to the distillation separation unit;

[0029] A vacuum pump is connected to the vacuum feeder.

[0030] According to the present invention, a resource recovery device for oil-containing diatomite is provided, wherein the recovery unit comprises:

[0031] A rolling oil collection device, connected to the distillation separation unit, is used to recover the target rolling oil;

[0032] A diatomite collection device, connected to the distillation and separation unit, is used to recover the diatomite residue;

[0033] A waste collection device, connected to the distillation and separation unit, is used to recycle the waste.

[0034] The present invention also provides a method for processing the above-mentioned resource recovery device for oil-containing diatomite, comprising:

[0035] The oil-containing diatomaceous earth is transported to the distillation and separation unit through the feeding unit;

[0036] The oil-containing diatomaceous earth is distilled and refined by the distillation separation unit to obtain the target rolling oil, diatomaceous earth residue and waste.

[0037] The target rolling oil, the diatomaceous earth slag, and the waste are recovered through the recycling unit.

[0038] This invention provides a resource recovery device and method for oil-containing diatomaceous earth. A feeding unit transports the oil-containing diatomaceous earth to a distillation and separation unit, where it undergoes distillation separation and rectification to obtain target rolling oil, diatomaceous earth slag, and waste. A recovery unit then recovers the target rolling oil, diatomaceous earth slag, and waste. This invention utilizes a "distillation separation + rectification and upgrading" technology to achieve the recovery and rectification of rolling oil. It also considers the promoting effect of reduced pressure on the low-temperature evaporation of rolling oil and the safe operation of the equipment. The rolling oil and diatomaceous earth slag are separated and recovered from the oil-containing diatomaceous earth, and the waste residue and exhaust gas generated during the entire process are properly treated. The collected rolling oil can be reused, and the diatomaceous earth slag can be used as a raw material in the building materials industry, reducing the amount of hazardous waste generated in the aluminum processing industry and achieving the goals of hazardous waste reduction and resource recovery. This invention is characterized by its simple structure, economy, and environmental friendliness. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0040] Figure 1 This is a structural block diagram of the resource utilization device for oil-containing diatomite provided by the present invention;

[0041] Figure 2 This is a schematic diagram of the structure of the resource recovery device for oil-containing diatomite provided by the present invention;

[0042] Figure 3 This is a schematic diagram of the structure of the heating still provided by the present invention;

[0043] Figure 4 This is a schematic flowchart of the resource utilization method for oil-containing diatomite provided by the present invention.

[0044] Figure label:

[0045] 100. Feeding unit;

[0046] 101. Vacuum feeder; 102. Vacuum pump;

[0047] 200. Distillation and separation unit;

[0048] 201. Heated distiller; 202. First condenser; 203. Distillation apparatus;

[0049] 204. Second condenser; 205. Distillation chamber; 206. Hot gas supply chamber;

[0050] 207. Storage room; 208. First hot gas supply pipeline; 209. Slag discharge pipeline;

[0051] 210. Second hot gas supply pipeline; 211. Nozzle; 212. Slag discharge port;

[0052] 213. Collection box; 214. First valve; 215. Second valve;

[0053] 216. Filter screen; 217. Distillation chamber; 218. Stirrer;

[0054] 219. Hollow sandwich structure; 220. Spiral mixing blades; 221. Fan;

[0055] 222. Heating unit; 223. Screw conveyor; 224. Slag discharge valve;

[0056] 300. Recycling unit;

[0057] 301. Rolling oil collection device; 302. Diatomaceous earth collection device;

[0058] 303. Waste gas collection device; 304. Waste residue bin;

[0059] 400. Electrical control unit. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0061] In the description of the embodiments of the present invention, it should be noted that the terms "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0062] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] The following is combined with Figures 1-4 The present invention describes an apparatus and method for the resource recovery of oil-containing diatomite.

[0065] According to an embodiment of the first aspect of the present invention, referring to Figure 1 As shown, the resource recovery device for oily diatomaceous earth provided by the present invention includes: a feeding unit 100, a distillation and separation unit 200, and a recovery unit 300 connected together. The feeding unit 100 is used to transport the oily diatomaceous earth to the distillation and separation unit 200; the distillation and separation unit 200 is used to distill and separate the oily diatomaceous earth and perform rectification and upgrading to obtain target rolling oil, diatomaceous earth slag, and waste; the recovery unit 300 is used to recover the target rolling oil, diatomaceous earth slag, and waste separately.

[0066] This invention aims to achieve effective separation of rolling oil and diatomaceous earth from oil-containing diatomaceous earth and to refine and improve the rolling oil through "distillation separation + rectification upgrading" technology, thereby reducing resource waste and environmental pollution. Specifically:

[0067] The feeding unit 100 is primarily responsible for transporting the oil-containing diatomaceous earth from the storage area to the next stage of the processing flow, namely the distillation and separation unit 200. It may include conveyor belts, conveyors, or other solid material transfer equipment to ensure continuous and stable feeding.

[0068] The distillation separation unit 200 is the core component of the entire unit, employing a "distillation separation + rectification upgrading" technology. The goal of this unit is to evaporate the rolling oil from the oil-containing diatomaceous earth and improve its quality to meet reuse requirements, while maintaining the basic integrity of the diatomaceous earth structure.

[0069] The separated materials enter the recycling unit 300, where the target rolling oil, diatomaceous earth slag, and other wastes are collected separately. The recycled rolling oil can be reused in the production process after treatment, the diatomaceous earth slag can be reused as a filter aid or used for other purposes depending on its properties, and the wastes can be disposed of in a harmless manner.

[0070] During operation, the oil-containing diatomaceous earth is first fed into the distillation and separation unit 200 through the feeding unit 100. In the distillation and separation unit 200, the oil-containing diatomaceous earth is heated to gradually evaporate the rolling oil in the mixture, while avoiding damage to the diatomaceous earth structure due to excessively high temperature.

[0071] The target rolling oil, diatomaceous earth slag, and other waste separated during the distillation process are collected in recycling unit 300. The recycled rolling oil can be directly reused in the production process, reducing the production costs of aluminum processing companies; if the quality permits, the diatomaceous earth slag can be regenerated and reused as a filter aid or for other industrial uses, thereby maximizing resource utilization.

[0072] Therefore, the resource-based treatment device for oily diatomite provided in this embodiment of the invention effectively realizes the resource-based treatment of oily diatomite through precise physical separation methods, and has significant economic and environmental benefits.

[0073] According to one embodiment of the present invention, referring to Figure 2 As shown, the distillation separation unit 200 includes: a heated distiller 201, a first condenser 202, a distillation unit 203, and a second condenser 204. The heated distiller 201 is connected to the feeding unit 100, which transports oil-containing diatomaceous earth into the heated distiller 201 for distillation to obtain rolling oil vapor and diatomaceous earth residue. The first condenser 202 is connected to the heated distiller 201 and is used for the first condensation separation of the rolling oil vapor to obtain first liquid rolling oil and first waste gas. The distillation unit 203 is connected to the first condenser 202 and is used for the rectification of the first liquid rolling oil to obtain gaseous rolling oil and waste residue. The second condenser 204 is connected to the distillation unit 203 and is used for the second condensation separation of the gaseous rolling oil to obtain second liquid rolling oil and second waste gas. The second liquid rolling oil is the target rolling oil, and the waste includes the first waste gas, the second waste gas, and the waste residue.

[0074] In this embodiment of the invention, the heating distiller 201 is the starting point of the entire distillation process. The oil-containing diatomaceous earth is heated therein, causing the rolling oil mixed in the diatomaceous earth to evaporate into steam, while the solid substances such as diatomaceous earth are left behind as diatomaceous earth slag, which can be recycled through the recycling unit 300.

[0075] The rolling oil vapor from the heated distiller 201 enters the first condenser 202, where it undergoes initial condensation and separation to form first liquid rolling oil and first waste gas. The first waste gas contains trace amounts of uncondensed rolling oil gas and soot gas. This process initially purifies the recovered rolling oil.

[0076] The first liquid rolling oil then enters distillation unit 203, a crucial process for improving oil purity. By adjusting the distillation unit's operating parameters, oil viscosity is reduced, impurities are removed, and quality is improved, yielding gaseous rolling oil and waste residue containing dust and other impurities. The distillation process ensures the high quality of the final product.

[0077] The gaseous rolling oil exiting the distillation unit 203 is introduced into the second condenser 204 for a second condensation, transforming it into a second liquid rolling oil, which is the target product. This condensation process also generates a second waste gas, which contains trace amounts of uncondensed rolling oil gas and soot gas.

[0078] The waste generated throughout the process, including the primary waste gas, the secondary waste gas, and the waste residue, can be further treated. For example, the waste gas can be purified through adsorption, catalytic oxidation, or combustion to ensure that emission standards are met.

[0079] Therefore, the embodiments of the present invention, through distillation separation and rectification upgrading technologies, not only effectively recover high-quality rolling oil and diatomaceous earth, but also reduce the environmental impact through meticulous waste management strategies.

[0080] According to one embodiment of the present invention, referring to Figure 3 As shown, the heated distiller 201 includes a distillation chamber 205, a hot gas supply chamber 206, and a storage chamber 207. The distillation chamber 205 is connected to the feeding unit 100 and is used to distill oil-containing diatomaceous earth to obtain rolling oil vapor and diatomaceous earth slag. The hot gas supply chamber 206 is connected to the distillation chamber 205 via a first hot gas supply pipe 208 and is used to heat the distillation chamber 205. The storage chamber 207 is connected between the distillation chamber 205 and the first condenser 202 and is used to store the rolling oil vapor.

[0081] In this embodiment of the invention, the hot gas supply chamber 206 supplies hot gas to the distillation chamber 205 through the first hot gas supply pipe 208 to provide the necessary heat for heating the oil-containing diatomaceous earth and promoting the evaporation of the rolling oil.

[0082] Storage chamber 207 is located between distillation chamber 205 and the first condenser 202, and its function is to temporarily store the rolling oil vapor released from distillation chamber 205. Storage chamber 207 allows for flexible control of the timing of condensation operations according to production scheduling, which is beneficial to the overall coordination and efficiency optimization of the production line. Furthermore, the existence of storage chamber 207 can also serve as a buffer, regulating the capacity matching between the upstream distillation process and the downstream condensation process, providing buffer space for dealing with emergencies (such as temporary energy supply instability or equipment maintenance), and enhancing the reliability of the entire unit.

[0083] According to one embodiment of the present invention, referring to Figure 3 As shown, the distillation chamber 205 is connected to the recovery unit 300 via a slag discharge pipe 209, which is used to transport the diatomaceous earth slag to the recovery unit 300. The hot gas supply chamber 206 is connected to the storage chamber 207 via a second hot gas supply pipe 210, which is also connected to the slag discharge pipe 209. A nozzle 211 is provided in the second hot gas supply pipe 210, which is used to spray hot gas from the hot gas supply chamber 206 onto the diatomaceous earth slag in the slag discharge pipe 209, thereby distilling out the rolling oil carried by the diatomaceous earth slag and sending it into the storage chamber 207. It is understood that the rolling oil carried by the diatomaceous earth slag includes a small amount of unevaporated liquid rolling oil and a small amount of rolling oil vapor adsorbed on the surface of the diatomaceous earth slag.

[0084] This embodiment, through ingenious structural design, achieves efficient recovery of trace amounts of rolling oil carried by diatomaceous earth slag, further improving resource recycling rate. This is the key point of the invention. Specifically:

[0085] Because a small amount of unevaporated liquid rolling oil and distilled rolling oil vapor are adsorbed on the surface of the diatomaceous earth slag when it is discharged, the hot air generated by the hot air supply chamber 206 can be sprayed at high speed through the nozzle 211, and then collide head-on with the diatomaceous earth slag containing rolling oil in the slag discharge pipe 209. Under the impact of high speed and high temperature, the rolling oil adsorbed on the surface of the diatomaceous earth slag is fully evaporated, and the evaporated rolling oil vapor is sent into the storage chamber 207, thereby improving the rolling oil recovery efficiency.

[0086] Understandably, in this way, the rolling oil that might otherwise have been discharged with the diatomaceous earth slag is re-evaporated and recycled to storage chamber 207, where it is then cooled and recycled as liquid oil by the subsequent first condenser 202. This additional recycling step significantly improves the rolling oil recycling efficiency.

[0087] Therefore, the embodiments of the present invention optimize the oil and gas recovery process by incorporating hot gas injection into the slag discharge process.

[0088] According to one embodiment of the present invention, referring to Figure 3 As shown, the distillation chamber 205 is provided with a slag discharge port 212 connected to the slag discharge pipe 209. The slag discharge pipe 209 is provided with a collection box 213, which is located between the slag discharge port 212 and the nozzle 211. The collection box 213 is provided with a slag inlet adjacent to the slag discharge port 212 and a slag outlet adjacent to the nozzle 211. The slag inlet is provided with a first valve 214 and the slag outlet is provided with a second valve 215.

[0089] In this embodiment of the invention, the collection box 213 is set as an intermediate buffer zone, located between the slag discharge port 212 and the nozzle 211 in the slag discharge pipe 209, and its function is to temporarily collect the diatomaceous earth slag discharged from the distillation chamber 205. The purpose of this design is to achieve precise control of the slag discharge process.

[0090] The first valve 214 is located at the slag inlet of the collection box 213, controlling the process of oily diatomaceous earth slag entering the collection box 213 from the distillation chamber 205. By opening the first valve 214 at the appropriate time, it can be ensured that the diatomaceous earth slag enters the collection box 213 at the appropriate time, so as not to enter too early or too late, which would affect the subsequent processing efficiency and resource recovery.

[0091] The second valve 215 is located at the slag outlet of the collection box 213. Its main function is to regulate the flow rate of diatomaceous earth slag to the nozzle 211. By precisely controlling the opening of the second valve 215, the uniform and orderly flow of diatomaceous earth slag can be achieved, which is crucial for ensuring the effectiveness of hot gas injection by the nozzle 211 and maximizing the recovery of residual rolling oil.

[0092] When slag discharge is required, the second valve 215 is adjusted to allow the diatomaceous earth slag in the collection box 213 to flow towards the nozzle 211 at a uniform speed and flow rate. This process, combined with the hot air injection from the nozzle 211, enables more thorough and efficient evaporation of the rolling oil remaining on the surface of the diatomaceous earth slag. The uniform slag discharge flow rate helps the hot air to fully contact the diatomaceous earth slag, improving heat exchange efficiency and thus enhancing the thoroughness of resource recovery.

[0093] The embodiments of the present invention, through the ingenious combination of the collection box 213 and the valve, not only optimize the controllability and efficiency of the slag discharge process, but also significantly increase the total amount of resources recovered, and reduce resource waste caused by improper operation or unreasonable process design.

[0094] According to one embodiment of the present invention, referring to Figure 3 As shown, a filter screen 216 is provided at the connection between the second hot gas supply pipe 210 and the storage chamber 207.

[0095] In this embodiment of the invention, the filter screen 216 plays a crucial separation role. It prevents diatomaceous earth slag particles ejected with hot gas from entering the storage chamber 207, ensuring that only pure rolling oil vapor is sent into the storage chamber 207 for condensation and recovery. This measure effectively avoids interference from solid impurities in the subsequent condensation and recovery process, improving the purity and quality of the recovered product.

[0096] According to one embodiment of the present invention, referring to Figure 3 As shown, the distillation chamber 205 includes a distillation cavity 217 and a stirrer 218. The distillation cavity 217 has a hollow jacket 219. The hot gas supply chamber 206 is connected to the hollow jacket 219 via a first hot gas supply pipe 208. The stirrer 218 includes a spiral stirring blade 220, which is disposed inside the distillation cavity 217.

[0097] In this embodiment of the invention, the hot gas in the hot gas supply chamber 206 enters the hollow interlayer 219 of the distillation chamber 217 through the first hot gas supply pipe 208. This indirect heating method prevents air from entering the distillation chamber 217, avoiding the possibility of explosion and greatly improving the safety of the production process. Furthermore, it avoids localized overheating that may be caused by direct heating, thereby reducing the risk of oil cracking and carbonization at high temperatures. Through heat transfer via the inner wall, the heat distribution is more uniform, allowing the oil-containing diatomaceous earth inside the chamber to be heated evenly, thus improving heat utilization efficiency.

[0098] The spiral stirring blades 220 of the mixer 218 are designed inside the distillation chamber 217. The speed can be adjusted as needed to ensure that the oil-containing diatomaceous earth is fully mixed in the chamber, so that each part of the material can be heated evenly, which accelerates the heat transfer process and thus improves the distillation efficiency.

[0099] In addition to mixing materials, the spiral structure of the spiral stirring blade 220 can also push the material towards the slag discharge port 212 during the stirring process, which helps to remove the deoiled diatomaceous earth slag in time, maintain the freshness of the material in the distillation chamber 217 and the ability to operate continuously, reduce the need for clogging and downtime cleaning, and improve the stability and efficiency of continuous operation.

[0100] According to one embodiment of the present invention, the distillation chamber 217 can be made of heat-insulating material, thereby improving the heating distillation efficiency.

[0101] According to one embodiment of the present invention, referring to Figure 3 As shown, the hot gas supply chamber 206 is equipped with a fan 221 and a heater 222. The fan 221 and the heater 222 work together to generate hot gas, which is introduced into the hot gas supply chamber 206. The hot gas can then be introduced into the hollow interlayer 219 of the distillation chamber 205 through the first hot gas supply pipe 208 to heat the oil-containing diatomaceous earth.

[0102] According to one embodiment of the present invention, referring to Figure 3 As shown, a screw conveyor 223 is provided in the slag discharge pipe 209. The screw conveyor 223 is located between the nozzle 211 and the recovery unit 300. The slag discharge pipe 209 is also provided with a slag discharge valve 224, which is located between the nozzle 211 and the screw conveyor 223.

[0103] When the slag discharge valve 224 is opened, the diatomaceous earth slag purified by the nozzle 211 in the slag discharge pipe 209 is sent to the recycling unit 300 for recycling via the screw conveyor 223. The entire process is sealed and the slag discharge is clean and thorough with no dust.

[0104] According to one embodiment of the present invention, referring to Figure 2 and Figure 3 As shown, the feeding unit 100 includes a vacuum feeder 101 and a vacuum pump 102. The vacuum feeder 101 is connected to the distillation chamber 205 of the distillation separation unit 200; the vacuum pump 102 is connected to the vacuum feeder 101.

[0105] Specifically, operating in a vacuum environment can significantly reduce the oxygen concentration, thereby virtually eliminating the oxidation reaction and explosion risks that may occur during oil heating. This provides extremely high safety assurance for handling flammable and explosive substances (such as rolling oil in oil-containing diatomaceous earth) and is a key measure to prevent production accidents.

[0106] Furthermore, under vacuum conditions, the boiling point of liquids decreases, which means that rolling oil can be evaporated at lower temperatures. This is especially important for heat-sensitive substances, as it can reduce thermal decomposition and polymerization reactions, and maintain the purity and recovery efficiency of the product.

[0107] Therefore, this invention takes into account the promoting effect of reduced pressure (i.e., vacuum) conditions on the low-temperature evaporation of rolling oil and the safe operation of the equipment.

[0108] In addition, two vacuum pumps 102 can be set up, one for backup and one for use. The two vacuum pumps 102 can be switched to ensure that the equipment always operates under the set vacuum state to ensure equipment safety.

[0109] Understandably, the waste gas generated during the distillation process also includes trace amounts of oil and gas carried out by the vacuum feeder 101 and vacuum pump 102 during operation, and the collected trace amounts of oil and gas will be treated periodically.

[0110] According to one embodiment of the present invention, referring to Figure 2 and Figure 3As shown, the recovery unit 300 includes: a rolling oil collection device 301, a diatomaceous earth collection device 302, and a waste collection device. The rolling oil collection device 301 is connected to the second condenser 204 of the distillation separation unit 200 and is used to recover the target rolling oil. The diatomaceous earth collection device 302 is connected to the slag discharge pipe 209 of the distillation separation unit 200 and is used to recover the diatomaceous earth slag. The waste collection device includes a waste gas collection device 303 and a waste residue bin 304. The waste gas collection device 303 is connected to the first condenser 202 and the second condenser 204 of the distillation separation unit 200 and is used to recover the first waste gas and the second waste gas. The waste residue bin 304 is connected to the distillation unit 203 of the distillation separation unit 200 and is used to recover the waste residue.

[0111] According to one embodiment of the present invention, referring to Figure 1 As shown, the resource utilization device for oily diatomite of the present invention further includes an electrical control unit 400, which is electrically connected to the feeding unit 100, the distillation and separation unit 200 and the recovery unit 300, and is used to control the entire processing process of the device.

[0112] The following description continues of the resource recovery method for oil-containing diatomite provided by the present invention. The resource recovery method for oil-containing diatomite described below can be referred to in correspondence with the resource recovery device for oil-containing diatomite described above.

[0113] According to an embodiment of the second aspect of the present invention, referring to Figure 4 As shown, the present invention also provides a method for processing the resource-based diatomite containing oil according to the above embodiments, comprising the following steps:

[0114] S401. The oil-containing diatomaceous earth is conveyed to the distillation and separation unit 200 through the feeding unit 100.

[0115] Specifically, during the resource utilization treatment of oily diatomaceous earth, a certain amount of oily diatomaceous earth is added into the vacuum feeder 101, and at the same time, the vacuum pump 102 is turned on to supply a vacuum atmosphere (vacuum degree of 2000-4000Pa). Then, it is further transported into the distillation chamber 205. At the same time, the stirrer 218 is rotated, and the stirring speed can be 12-20 r / min to make the oily diatomaceous earth evenly distributed in the distillation chamber 205, so as to ensure that the oily diatomaceous earth can be heated evenly when heated.

[0116] S402. The oil-containing diatomaceous earth is distilled and refined by the distillation separation unit 200 to obtain the target rolling oil, diatomaceous earth slag and waste.

[0117] S403, the target rolling oil, diatomaceous earth slag and waste are recovered through the recycling unit 300 respectively.

[0118] Specifically, the blower 221 is started to generate airflow, which is then heated by the heater 222 to form hot gas. The hot gas enters the distillation chamber 205 through the first hot gas supply pipe 208. The material temperature in the distillation chamber 205 is controlled at 160℃~220℃ to heat and distill the oil-containing diatomaceous earth, forming diatomaceous earth slag and rolling oil vapor. The residence time of the material in the distillation chamber is 30-90 minutes (which can be adjusted appropriately according to the amount of oil-containing diatomaceous earth added). After that, the rolling oil vapor is transported to the storage chamber 207.

[0119] During operation, at regular intervals, the first valve 214 of the collection box 213 is opened, so that the diatomaceous earth slag is transported to the collection box 213 in the slag discharge pipe 209 under the push of the mixer 218.

[0120] When slag discharge is required, the second valve 215 of the collection box 213 is opened to control a certain amount of diatomaceous earth slag to flow to the nozzle 211. Then, the second valve 215 is closed. This portion of diatomaceous earth slag remains at the nozzle 211 for a certain period of time. The nozzle 211 will then spray high-temperature hot air generated by the hot air supply chamber 206 at high speed, causing a head-on collision with the diatomaceous earth slag particles containing rolling oil. Under the impact of high speed and high temperature, the rolling oil adsorbed on the surface of the diatomaceous earth slag particles is evaporated and blown into the storage chamber 207. After processing, the slag discharge valve 224 is opened, allowing the diatomaceous earth slag to be discharged into the diatomaceous earth collection device 302 via the screw conveyor 223 in the slag discharge pipe 209. After this portion of diatomaceous earth slag is processed, the second valve 215 is opened again to control a certain amount of diatomaceous earth slag to flow to the nozzle 211. Then, the second valve 215 is closed, and the above steps are repeated. This operation can improve the purification effect of the diatomaceous earth slag and maximize the recovery of rolling oil vapor.

[0121] Under a vacuum atmosphere (vacuum degree of 2000-4000Pa), the rolling oil vapor in the storage chamber 207 enters the first condenser 202. After the first condensation and separation, it forms the first liquid rolling oil and the first waste gas. The first liquid rolling oil enters the distiller 203, and the first waste gas is discharged into the waste gas collection device 303.

[0122] The first liquid rolling oil is further distilled and separated into gaseous rolling oil and waste residue in the distiller 203. The gaseous rolling oil enters the second condenser 204, while the waste residue gradually accumulates at the bottom of the distiller 203 and can be discharged into the waste residue bucket 304.

[0123] The gaseous rolling oil enters the second condenser 204 and undergoes a second condensation and separation to form the second liquid rolling oil and the second waste gas. The second liquid rolling oil enters the rolling oil collection device 301, and the second waste gas is discharged into the waste gas collection device 303.

[0124] The resource recovery method for oily diatomaceous earth provided in this invention, through distillation at a material temperature of 160℃~220℃, combined with subsequent rectification and upgrading, can extract and recover rolling oil, diatomaceous earth residue, and waste. Furthermore, it can effectively prevent the cracking and carbonization of the oil during heating, thus preventing explosions. In addition, no acidic, alkaline, or other harmful substances are used in the process, and the oil content of the treated diatomaceous earth is less than 3000 mg / kg, meeting relevant standards.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A resource recovery device for oil-containing diatomaceous earth, characterized in that, include: The interconnected feeding unit, distillation and separation unit, and recovery unit, among which, The feeding unit is used to transport oil-containing diatomaceous earth to the distillation and separation unit; The distillation and separation unit is used to distill and refine the oil-containing diatomite to obtain the target rolling oil, diatomite residue and waste. The recycling unit is used to recycle the target rolling oil, the diatomaceous earth slag, and the waste, respectively. The distillation separation unit includes: A heated still is connected to the feeding unit, which is used to transport the oil-containing diatomaceous earth into the heated still for distillation to obtain rolled oil vapor and the diatomaceous earth residue. The first condenser, connected to the heating distillation apparatus, is used to perform a first condensation and separation of the rolling oil vapor to obtain a first liquid rolling oil and a first waste gas; The heated distiller includes: The distillation chamber, connected to the feeding unit, is used to distill the oil-containing diatomaceous earth to obtain the rolling oil vapor and the diatomaceous earth residue. A hot gas supply chamber is connected to the distillation chamber via a first hot gas supply pipe and is used to heat the distillation chamber. A storage chamber, connected between the distillation chamber and the first condenser, is used to store the rolling oil vapor; The distillation chamber is connected to the recycling unit via a slag discharge pipe, which is used to transport the diatomaceous earth slag to the recycling unit. The hot gas supply chamber is connected to the storage chamber via a second hot gas supply pipe, and the second hot gas supply pipe is connected to the slag discharge pipe. The second hot gas supply pipe is equipped with a nozzle, which is used to spray hot gas from the hot gas supply chamber onto the diatomaceous earth slag in the slag discharge pipe, so as to distill out the rolling oil carried by the diatomaceous earth slag and send it into the storage chamber.

2. The resource recovery device for oil-containing diatomaceous earth according to claim 1, characterized in that, The distillation separation unit further includes: A distillation unit, connected to the first condenser, is used to distill the first liquid rolling oil to obtain gaseous rolling oil and waste residue. The second condenser, connected to the distillation unit, is used to perform a second condensation and separation of the gaseous rolling oil to obtain a second liquid rolling oil and a second waste gas. Wherein, the second liquid rolling oil is the target rolling oil, and the waste includes the first waste gas, the second waste gas, and the waste residue.

3. The resource recovery device for oil-containing diatomaceous earth according to claim 1, characterized in that, The distillation chamber is provided with a slag discharge port connected to the slag discharge pipe. A collection box is provided in the slag discharge pipe. The collection box is located between the slag discharge port and the nozzle. The collection box is provided with a slag inlet adjacent to the slag discharge port and a slag outlet adjacent to the nozzle. A first valve is provided at the slag inlet and a second valve is provided at the slag outlet.

4. The resource recovery device for oil-containing diatomaceous earth according to claim 1, characterized in that, A filter screen is provided at the connection between the second hot gas supply pipe and the storage chamber.

5. The resource recovery device for oil-containing diatomaceous earth according to claim 1, characterized in that, The distillation chamber includes: The distillation chamber has a hollow interlayer, and the hot gas supply chamber is connected to the hollow interlayer via the first hot gas supply pipe; A mixer, including a spiral stirring blade disposed within the distillation chamber.

6. The resource recovery device for oil-containing diatomaceous earth according to any one of claims 1 to 5, characterized in that, The feeding unit includes: A vacuum feeder is connected to the distillation separation unit; A vacuum pump is connected to the vacuum feeder.

7. The resource recovery device for oil-containing diatomaceous earth according to any one of claims 1 to 5, characterized in that, The recycling unit includes: A rolling oil collection device, connected to the distillation separation unit, is used to recover the target rolling oil; A diatomite collection device, connected to the distillation and separation unit, is used to recover the diatomite residue; A waste collection device, connected to the distillation separation unit, is used to recycle the waste.

8. A method for processing oil-containing diatomaceous earth using a resource recovery device according to any one of claims 1 to 7, characterized in that, include: The oil-containing diatomaceous earth is transported to the distillation and separation unit through the feeding unit; The oil-containing diatomaceous earth is distilled and refined by the distillation separation unit to obtain the target rolling oil, diatomaceous earth residue and waste. The target rolling oil, the diatomaceous earth slag, and the waste are recovered through the recycling unit.

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