Efficient mixed pretreatment feed system for waste mineral oil
Patent Information
- Application Number
- CN202521247556.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-18
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-06-18
AI Technical Summary
[0011]采用本实用新型的技术方案，具有以下有益效果：本实用新型的技术方案，采用文丘里效应混合废矿物油与碱液，碱液能最大限度的与废矿物油混合，提高混合效率，能够使得碱液与废矿物油快速充分混合，文丘里管混合器设计简便，方便拆卸维修及更换，不需要额外的设备及能耗，运行成本大大降低，且不需要添加额外设备及能耗，非常简便高效，能够有效解决废矿物油碱洗过程混合不充分的问题。
Smart Images
Figure CN224793262U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste mineral oil treatment technology, and in particular to a high-efficiency mixing and pretreatment feeding system for waste mineral oil. Background Technology
[0002] Domestic waste mineral oil regeneration processes are mainly divided into two types: physical regeneration processes, primarily including atmospheric distillation and filtration; and chemical regeneration processes, primarily including: acid washing-alkali washing-clay refining, solvent refining-clay refining, and hydrorefining. This process employs physical regeneration. Vacuum distillation can separate components with different boiling points in waste mineral oil at relatively low temperatures because the reduced pressure lowers the liquid's boiling point, avoiding the damage to oil quality caused by high temperatures, such as preventing oil cracking and coking. In this way, the base oil components in waste mineral oil can be effectively separated according to their boiling point range, obtaining various base oil products with different distillation ranges. This provides diverse raw materials for subsequent blending and utilization, and is the most common process for waste mineral oil regeneration.
[0003] Waste mineral oil contains a large number of impurities during collection and requires pretreatment before regeneration. Pretreatment includes physical sedimentation and alkaline washing. However, during alkaline washing, the density and viscosity of the alkaline solution differ significantly from those of the waste mineral oil, preventing proper mixing and mass transfer and affecting the washing effect. The traditional solution involves adding a motor and screw in the storage tank for physical mixing, but this method requires additional equipment and consumes energy. Utility Model Content
[0004] The main purpose of this invention is to propose a high-efficiency mixing and pretreatment feeding system for waste mineral oil, which aims to solve the technical problem that insufficient mixing and poor mass transfer between the alkali solution and the waste mineral oil during the existing waste mineral oil pretreatment alkaline washing process affect the alkaline washing effect.
[0005] To achieve the above objectives, this utility model proposes a high-efficiency mixing and pretreatment feeding system for waste mineral oil, comprising a feeding system, a settling system, a mixing system, a pretreatment system, and a storage system. The feeding system is used for conveying materials into the site. The settling system includes a settling tank, a feed pipe, a discharge pipe, and a drain outlet. The feed pipe is located in the middle of the settling tank for material entry. The feeding system is connected to the feed pipe of the settling tank. The settling tank is used to temporarily store the incoming oil and perform physical settling to remove solid impurities from the mineral oil. The drain outlet is located at the bottom of the settling tank for discharging the settled solid waste. The discharge pipe is located at the top of the settling tank for material discharge. The mixing system includes a Venturi mixer, an alkali feed pipe interface, and a regulating valve. The discharge pipe of the settling tank is connected to the inlet of the Venturi mixer. The two ends of the Venturi mixer are a contraction section and a diffusion section, respectively. The connection point between the components is a throat. The alkali inlet pipe interface is located on the throat. The regulating valve is located on the alkali inlet pipe interface and is connected to the alkali inlet pipe. The Venturi mixer is used to fully mix waste mineral oil and alkali. The pretreatment system includes a pretreatment tank, an inlet pipe, an outlet pipe, and a drain pipe. The inlet pipe is located in the middle of the pretreatment tank for material entry. The outlet of the Venturi mixer is connected to the inlet pipe of the pretreatment tank. The outlet pipe is located at the top of the pretreatment tank for waste mineral oil discharge. The drain pipe is located at the bottom of the pretreatment tank for waste mineral oil discharge. The pretreatment tank is used for settling and stratification of the mixed discharge. The storage system includes a temporary storage tank and an inlet pipe. The inlet pipe is located at the upper end of the temporary storage tank. The inlet pipe of the temporary storage tank is connected to the outlet pipe of the pretreatment tank. The temporary storage tank is used for storing waste mineral oil after the pretreatment system.
[0006] Optionally, the feeding method of the feeding system is loading arm feeding or pipeline feeding.
[0007] Optionally, the mixing system further includes a pressure gauge disposed on the throat of the venturi mixer, the pressure gauge being used to monitor the pressure in the throat in real time.
[0008] Optionally, the constriction section of the Venturi mixer is a tapered tube that is larger at the front and smaller at the back, with a taper of 23°. The inner diameter of the constriction section gradually decreases along its length to 1 / 3 of the inner diameter at the inlet.
[0009] Optionally, the inner diameter of the throat is the narrowest point of the Venturi mixer, and the size of the inner diameter of the throat is 1 / 3 of the inner diameter of the inlet of the Venturi mixer.
[0010] Optionally, the diffusion section of the venturi mixer is a tapered tube with a smaller front and a larger rear, and the taper of the diffusion section is 10°.
[0011] The technical solution of this utility model has the following beneficial effects: The technical solution of this utility model uses the Venturi effect to mix waste mineral oil and alkali solution. The alkali solution can mix with the waste mineral oil to the maximum extent, improving the mixing efficiency. It can make the alkali solution and waste mineral oil mix quickly and thoroughly. The Venturi tube mixer is simple in design, easy to disassemble, maintain and replace, and does not require additional equipment and energy consumption, greatly reducing the operating cost. It is very simple and efficient, and can effectively solve the problem of insufficient mixing in the alkaline washing process of waste mineral oil. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the overall structure of a waste mineral oil high-efficiency mixing and pretreatment feeding system according to an embodiment of the present invention;
[0014] Figure 2 This is a schematic diagram of the mixing system of a waste mineral oil high-efficiency mixing pretreatment feeding system according to an embodiment of the present invention.
[0015] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0016] 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.
[0017] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0018] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0019] This invention proposes a high-efficiency mixing and pretreatment feeding system for waste mineral oil.
[0020] like Figure 1 and Figure 2 As shown in one embodiment of this utility model, the waste mineral oil high-efficiency mixing and pretreatment feeding system includes a feeding system 100, a settling system 200, a mixing system 300, a pretreatment system 400, and a storage system 500. The feeding system 100 is used for material inbound conveying. The settling system 200 includes a settling tank 201, an inlet pipe, an outlet pipe, and a drain pipe. The inlet pipe is located in the middle of the settling tank 201 for material inbound. The feeding system 100 is connected to the inlet pipe of the settling tank 201. The settling tank 201 is used to temporarily store the inbound oil and perform physical settling to remove impurities. Mineral oil solid impurities are discharged through a drain pipe located at the bottom of settling tank 201 for discharging settled solid waste. A discharge pipe is located at the top of settling tank 201 for material discharge. The mixing system 300 includes a Venturi mixer 301, an alkali feed pipe interface 302, and a regulating valve 303. The discharge pipe of settling tank 201 is connected to the inlet of Venturi mixer 301. The two ends of Venturi mixer 301 are a contraction section 3011 and a diffusion section 3012, respectively. The connection between the contraction section 3011 and the diffusion section 3012 is a throat 3013. The alkali feed... Pipe interface 302 is located on throat 3013, and regulating valve 303 is located on alkali inlet pipe interface. Regulating valve 303 is connected to the alkali inlet pipe to facilitate adjustment of the alkali flow rate. The alkali mixes with waste mineral oil in the throat. After passing through the diffusion section, the flow velocity of the mixture decreases, the static pressure increases, and turbulence and shearing occur, thus achieving thorough mixing. Venturi tube mixer 301 is used to thoroughly mix waste mineral oil and alkali. The pretreatment system 400 includes pretreatment tank 401, inlet pipe, outlet pipe, and drain pipe. The inlet pipe is located in the middle of pretreatment tank 401. Upon material entry, the outlet of the Venturi mixer 301 is connected to the feed pipe of the pretreatment tank 401. The discharge pipe is located at the top of the pretreatment tank 401 for discharging waste mineral oil, and the drain outlet is located at the bottom of the pretreatment tank 401 for discharging waste mineral oil. The pretreatment tank 401 is used for settling and stratification of the mixed discharge. The storage system 500 includes a temporary storage tank 501 and a feed pipe. The feed pipe is located at the top of the temporary storage tank 501, and the feed pipe of the temporary storage tank 501 is connected to the discharge pipe of the pretreatment tank 401. The temporary storage tank 501 is used for storing the waste mineral oil after the pretreatment system.
[0021] Specifically, the feeding system 100 can be fed by loading arm or by pipeline. Loading arm feeding is suitable for transporting oil in tonne containers, while pipeline feeding is suitable for transporting oil in tank trucks. Materials entering the site first pass through the feeding system. Depending on the mode of transport, it is divided into tank truck feeding and tonne container feeding. When tank trucks enter the site, the tank truck outlet is connected to the inlet of the feeding pipeline and then pumped into the settling system. When tonne container feeding, the loading arm absorbs mineral oil into the temporary storage tank and then pumps it into the settling system.
[0022] Specifically, the mixing system 300 also includes a pressure gauge (not shown), which is installed on the throat 3013 of the venturi mixer 301. The pressure gauge is used to monitor the pressure of the throat 3013 in real time and can accurately detect the alkali feed status.
[0023] Specifically, such as Figure 2 As shown, the converging section 3011 of the Venturi mixer 301 is a tapered tube that is larger at the front and smaller at the back. The taper of the converging section 3011 is 23°, and the inner diameter of the converging section 3011 gradually decreases to 1 / 3 of the inner diameter at the inlet along the length direction.
[0024] Specifically, such as Figure 2 As shown, the inner diameter of the throat 3013 is the narrowest point of the Venturi mixer 301, and the size of the inner diameter of the throat 3013 is 1 / 3 of the inner diameter of the inlet of the Venturi mixer 301.
[0025] Specifically, such as Figure 2 As shown, the diffuser section 3012 of the Venturi mixer 301 is a tapered tube with a smaller front and a larger rear, and the taper of the diffuser section 3012 is 10°.
[0026] Specifically, the working principle and process of this utility model are as follows: After settling, the waste mineral oil first enters the Venturi inlet section, flowing smoothly into the Venturi tube. It then enters the contraction section, where the flow velocity increases and the pressure decreases. Upon entering the throat, the flow velocity reaches its maximum and the pressure its minimum. The throat diameter is approximately □(1 / 3) of the inlet section. According to the continuity equation Q=Aν, the flow velocity increases to nine times its original value. The throat length is roughly equal to the diameter. An alkali feed pipe is connected to the throat, and the pressure in the alkali feed pipe is greater than the throat pressure, ensuring complete entry of the alkali into the throat. After mixing, the mixture enters the Venturi diffusion section. In the diffusion section, as the cross-sectional area gradually increases, the fluid velocity gradually decreases and the pressure gradually recovers. During this process, strong turbulent diffusion and momentum exchange occur between fluids of different velocities and properties. The waste mineral oil and alkali are further mixed uniformly in the diffusion section, ultimately exiting the Venturi mixer in a relatively stable mixed state. This achieves rapid and thorough mixing, improving mixing efficiency and effectiveness, and effectively solving the problem of insufficient mixing during the alkali washing process of waste mineral oil.
[0027] The technical solution of this utility model has the following advantages: This utility model adopts the Venturi effect to mix waste mineral oil and alkali solution. The alkali solution can mix with the waste mineral oil to the maximum extent, improving the mixing efficiency and enabling the alkali solution and waste mineral oil to mix quickly. The Venturi tube mixer is simple in design, easy to disassemble, maintain and replace, and does not require additional equipment and energy consumption, greatly reducing the operating cost. It is very simple and efficient, and can effectively solve the problem of insufficient mixing in the alkaline washing process of waste mineral oil.
[0028] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A high-efficiency mixing and pretreatment feeding system for waste mineral oil, characterized in that, The system includes a feeding system, a settling system, a mixing system, a pretreatment system, and a storage system. The feeding system is used for conveying materials into the site. The settling system includes a settling tank, a feed pipe, a discharge pipe, and a drain outlet. The feed pipe is located in the middle of the settling tank for material entry. The feeding system is connected to the feed pipe of the settling tank. The settling tank is used to temporarily store the incoming oil and perform physical settling to remove solid impurities from the mineral oil. The drain outlet is located at the bottom of the settling tank for discharging settling solid waste. The discharge pipe is located at the top of the settling tank for material discharge. The mixing system includes a Venturi mixer, an alkali feed pipe interface, and a regulating valve. The discharge pipe of the settling tank is connected to the inlet of the Venturi mixer. The two ends of the Venturi mixer are a contraction section and a diffusion section, respectively, with the connection between the contraction section and the diffusion section forming a throat. The alkali feed pipe... An interface is located on the throat, and a regulating valve is located on the alkali inlet pipe interface. The regulating valve is connected to the alkali inlet pipe. The Venturi mixer is used to fully mix waste mineral oil and alkali. The pretreatment system includes a pretreatment tank, an inlet pipe, an outlet pipe, and a drain pipe. The inlet pipe is located in the middle of the pretreatment tank for material entry. The outlet of the Venturi mixer is connected to the inlet pipe of the pretreatment tank. The outlet pipe is located at the top of the pretreatment tank for waste mineral oil discharge. The drain pipe is located at the bottom of the pretreatment tank for waste mineral oil discharge. The pretreatment tank is used for settling and stratification of the mixed discharge. The storage system includes a temporary storage tank and an inlet pipe. The inlet pipe is located at the upper end of the temporary storage tank. The inlet pipe of the temporary storage tank is connected to the outlet pipe of the pretreatment tank. The temporary storage tank is used for storing waste mineral oil after the pretreatment system.
2. The waste mineral oil high-efficiency mixing and pretreatment feeding system according to claim 1, characterized in that, The feeding system can be fed by loading arm or by pipeline.
3. The waste mineral oil high-efficiency mixing and pretreatment feeding system according to claim 1, characterized in that, The mixing system also includes a pressure gauge, which is installed on the throat of the venturi mixer and is used to monitor the pressure in the throat in real time.
4. The waste mineral oil high-efficiency mixing and pretreatment feeding system according to claim 1, characterized in that, The constriction section of the Venturi mixer is a tapered tube that is larger at the front and smaller at the back. The taper of the constriction section is 23°, and the inner diameter of the constriction section gradually decreases along the length direction to 1 / 3 of the inner diameter at the inlet.
5. The waste mineral oil high-efficiency mixing and pretreatment feeding system according to claim 1, characterized in that, The inner diameter of the throat is the narrowest point of the Venturi mixer, and the size of the inner diameter of the throat is 1 / 3 of the inner diameter of the inlet of the Venturi mixer.
6. The waste mineral oil high-efficiency mixing and pretreatment feeding system according to claim 1, characterized in that, The diffuser section of the Venturi mixer is a tapered tube that is smaller at the front and larger at the back, with a taper of 10°.