Super-intensive micro sand flocculent precipitation device suitable for offshore platform
By designing an ultra-intensive micro-sand flocculation sedimentation device on an offshore platform, and utilizing micro-sand circulation and special anti-corrosion treatment, the low efficiency and corrosion problems of traditional coagulation sedimentation methods have been solved, achieving efficient solid-liquid separation and corrosion resistance of the equipment.
Patent Information
- Application Number
- CN202520378576.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-06
AI Technical Summary
Traditional coagulation sedimentation methods have problems such as low hydraulic load, slow solid-liquid separation, large chemical dosage, large sludge volume, and poor water quality when applied to offshore platforms. In addition, the equipment is susceptible to corrosion from marine salt spray.
An ultra-intensive micro-sand flocculation and sedimentation device was designed, including a coagulation tank, an injection tank, a maturation tank, a sedimentation tank, a hydrocyclone, and a micro-sand circulation pump. It is made of stainless steel and has undergone special anti-corrosion treatment. The micro-sand circulation realizes the reuse of reagents and sludge circulation, thereby enhancing the flocculation and sedimentation effect.
It achieves efficient solid-liquid separation, reduces reagent usage, decreases sludge production, improves water quality, is corrosion-resistant, occupies a small area, and is suitable for space constraints on offshore platforms.
Smart Images
Figure CN223950826U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sewage treatment equipment technical field, concretely is a kind of super-intensive micro-sand flocculation precipitation device suitable for offshore platform. BACKGROUND
[0002] With the increasing production capacity of offshore oilfield group in recent years, the production water volume of oilfield group is also increasing, and the treatment capacity of some built production facilities of oilfield group appears serious shortage, which cannot meet the production demand in later period, so new offshore platform needs to be built to receive and treat the production water of oilfield group, and the treated production water needs to be injected into stratum. The space of offshore platform is limited, and all equipment and components of production water treatment system need to adapt to marine salt fog environment, and chloride ion in salt fog has strong penetration ability, which can easily penetrate the oxide layer of metal and enter the interior of metal, resulting in equipment corrosion.
[0003] Coagulation sedimentation method is a treatment method for eliminating or reducing mutual repulsion between colloidal particles in water by adding coagulant and flocculant into wastewater, so that colloidal particles in water can easily collide and agglomerate to become larger particles or flocs, and then be separated from water. These large particles will settle to the bottom under the action of gravity, so as to realize wastewater purification. Coagulation sedimentation method is a commonly used wastewater treatment method.
[0004] However, the traditional coagulation sedimentation process also has problems of low hydraulic load, slow solid-liquid separation, large amount of chemicals and large amount of sludge, and poor effluent water quality.
[0005] Therefore, the utility model designs a super-intensive micro-sand flocculation precipitation device suitable for offshore platform to solve the above problems. SUMMARY
[0006] The utility model aims at providing a super-intensive micro-sand flocculation precipitation device suitable for offshore platform to solve the above technical problems.
[0007] To achieve the above purpose, the utility model provides the following technical scheme: a super-intensive micro-sand flocculation precipitation device suitable for offshore platform, comprising: a device prying platform; further comprising a coagulation tank, an injection tank, a maturation tank, a sedimentation tank, a hydrocyclone, a micro-sand circulating pump and a self-control power distribution cabinet arranged on the device prying platform;
[0008] The coagulation tank comprises a coagulation tank stirrer composed of a stainless steel shaft and an impeller arranged at the center of the top end of the coagulation tank;
[0009] The injection tank comprises an injection tank stirrer composed of a stainless steel shaft and an impeller arranged at the center of the top end of the injection tank;
[0010] The maturation tank comprises a maturation tank stirrer composed of a stainless steel shaft and an impeller arranged at the center of the top end of the maturation tank;
[0011] The sedimentation tank comprises a mud scraper arranged at the center of the top end of the tank and composed of a stainless steel shaft and an impeller;
[0012] The hydrocyclone is arranged above the injection tank, the inlet of the hydrocyclone is connected with the outlet of the micro-sand circulating pump, and the inlet of the micro-sand circulating pump is communicated with the mud discharge pipeline of the mud hopper of the sedimentation tank.
[0013] Preferably, the main body material of the equipment skid platform and components on the platform is selected from 345R with a thickness of 10mm, the surface of which is coated with epoxy zinc, epoxy cloud iron and polyurethane, and the inside of which is coated with ceramic paint.
[0014] Preferably, the connecting pipeline of the equipment skid platform and components on the platform is made of DSS2205, the liquid receiving materials of the coagulation tank mixer, the injection tank mixer, the curing tank mixer and the mud scraper are all made of DSS2205, and the micro-sand circulating pump is made of DSS2205.
[0015] Preferably, the equipment skid platform is divided into two layers, the coagulation tank, the injection tank, the curing tank, the sedimentation tank and the hydrocyclone are arranged on the second layer of the equipment skid platform, the micro-sand circulating pump and the automatic control power distribution cabinet are arranged on the first layer of the equipment skid platform, and the automatic control power distribution cabinet is connected with each electrical equipment.
[0016] Preferably, the upper portion of the sedimentation tank is provided with a slanted plate module made of PP, the slanted plate is inclined at an angle of 60° with respect to the horizontal plane, the upper portion of the slanted plate module is integrally provided with a water outlet groove, and the mud scraper of the sedimentation tank is driven by a speed reducer engine.
[0017] Preferably, the coagulation tank mixer and the injection tank mixer are vertically installed and driven by constant speed engines.
[0018] Preferably, the micro-sand with a particle size of about 100-150μm is added into the injection tank as an auxiliary material.
[0019] Preferably, the curing tank mixer is vertically installed and driven by a variable speed engine, and the variable speed driver is connected in the main control panel.
[0020] Preferably, the micro-sand circulating pump is a slurry pump, and the rotating speed of the pump is controlled by a frequency converter.
[0021] Preferably, the protective cover net is arranged in the passageway around the equipment skid platform, and the material of the protective cover net is SS316L.
[0022] Compared with the prior art, the device has the following beneficial effects:
[0023] 1. The residence time of the super-intensive micro-sand flocculation and sedimentation device is short, and the total residence time of the coagulation reaction is less than 15min.
[0024] 2. The hydraulic load of the sedimentation tank in the super-intensive micro-sand flocculation and sedimentation device can be as high as 10 m / h or more, which is 10 times or more of the traditional coagulation and sedimentation;
[0025] 3. The super-intensive micro-sand flocculation and sedimentation device occupies a small area, saves space, and is convenient for transportation and installation;
[0026] 4. The super-intensive micro-sand flocculation and sedimentation device realizes the reuse of part of the reagent and sludge circulation through micro-sand circulation, saves the amount of reagent, and discharges less sludge;
[0027] 5. The super-intensive micro-sand flocculation and sedimentation device is specially protected against corrosion, and the equipment material can resist corrosion in a marine salt spray environment. BRIEF DESCRIPTION OF DRAWINGS
[0028] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0029] Fig. 1 It is a schematic diagram of the overall structure of the embodiment;
[0030] Fig. 2 It is a schematic diagram of the highlighted overhead structure of the embodiment.
[0031] In the drawings, the component list represented by each reference numeral is as follows:
[0032] 1, equipment pry platform; 2, coagulation tank; 21, coagulation tank mixer; 3, injection tank; 31, injection tank mixer; 4, curing tank; 41, curing tank mixer; 5, sedimentation tank; 51, mud scraper; 52, inclined plate module; 6, hydrocyclone; 7, micro-sand circulating pump; 8, automatic control power distribution cabinet. DETAILED DESCRIPTION
[0033] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0034] Please refer to Figs. 1-2The utility model provides a technical scheme: a kind of super-intensive micro-sand flocculation precipitation device suitable for offshore platform, comprising: equipment pry platform 1;Further comprising the coagulation tank 2, injection pool 3, maturation tank 4, sedimentation tank 5, hydrocyclone 6, micro-sand circulating pump 7 and automatic control distribution cabinet 8 on equipment pry platform 1;
[0035] Coagulation tank 2 includes a coagulation tank stirrer 21 composed of stainless steel shaft and impeller at its top center;
[0036] Injection pool 3 includes an injection pool stirrer 31 composed of stainless steel shaft and impeller at its top center;
[0037] Maturation tank 4 includes a maturation tank stirrer 41 composed of stainless steel shaft and impeller at its top center;
[0038] Sedimentation tank 5 includes a mud scraper 51 composed of stainless steel shaft and impeller at its top center;
[0039] Hydrocyclone 6 is arranged above injection pool 3, the inlet thereof is connected with the outlet of micro-sand circulating pump 7, the inlet of micro-sand circulating pump 7 is connected with the sludge discharge pipeline of sedimentation tank 5, each equipment component is centrally arranged on equipment pry platform 1, offshore transportation and installation are facilitated, the land area is small, and the equipment motor is selected, the marine explosion-proof motor Exd II B is selected, the space heating is equipped for the motor with 5KW and above, the temperature probe is equipped for the motor with frequency converter control, the hydrocyclone 6 is connected with the micro-sand circulating pump 7, wherein the micro-sand can be separated from sludge, so that the micro-sand is discharged into injection pool 3, and the sludge is discharged from the overflow of hydrocyclone 6.
[0040] Further preferably, the main material of equipment pry platform 1 and components on the platform is 345R with a thickness of 10mm, the surface thereof is coated with epoxy zinc, epoxy cloud iron and polyurethane, the inside is coated with ceramic paint, the main material of equipment is selected as 345R with a thickness of 10mm, which is a stainless steel type with high hardness and strength, and also has good plasticity, corrosion resistance, heat resistance and impact resistance, and the surface paint of equipment is suitable for the marine environment (moisture, mold, salt spray) of Chinese sea area.
[0041] Further preferably, the connecting pipeline of equipment pry platform 1 and components on the platform is made of DSS2205, the liquid receiving materials of coagulation tank stirrer 21, injection pool stirrer 31, maturation tank stirrer 41 and mud scraper 51 are all DSS2205, and the material of micro-sand circulating pump 7 is DSS2205, and DSS2205 in equipment is a stainless steel type.
[0042] Further preferably, the equipment skid platform 1 is divided into one and two layers, the coagulation tank 2, the injection tank 3, the maturation tank 4, the sedimentation tank 5 and the hydrocyclone 6 are arranged on the second layer of the equipment skid platform 1, the micro-sand circulating pump 7 and the automatic control power distribution cabinet 8 are arranged on the first layer of the equipment skid platform 1, and the automatic control power distribution cabinet 8 is connected to each electrical equipment.
[0043] Further preferably, the upper portion of the sedimentation tank 5 is provided with a PP-made inclined plate module 52, the inclined plate is inclined at 60° of the horizontal plane, and the upper portion of the inclined plate module 52 is integrally provided with a water outlet groove, and the mud scraper 51 of the sedimentation tank 5 is driven by a speed reducer engine, and the mud scraper 51 is controlled by a frequency converter, and if the mechanical thermal load is overloaded, the engine will automatically shut down or send an alarm to the operator.
[0044] Further preferably, the coagulation tank mixer 21 and the injection tank mixer 31 are vertically installed and driven by a constant speed engine.
[0045] Further preferably, the micro-sand with a particle size of about 100-150 μm is added as an auxiliary in the injection tank 3, the micro-sand circulation and supplement can increase the probability of flocculation in the maturation tank 4, ensure the density of the flocculation, increase the speed of flocculation formation and sedimentation, and significantly improve the flocculation and sedimentation effect of the system.
[0046] Further preferably, the maturation tank mixer 41 is vertically installed and driven by a variable speed engine, and the variable speed driver is connected in the main control panel.
[0047] Further preferably, the micro-sand circulating pump 7 is a slurry pump, and the rotating speed is controlled by a frequency converter.
[0048] Further preferably, a protective cover net is arranged in the passage around the equipment skid platform 1, which is made of SS316L, and the safety during manual inspection is improved by the protective cover net.
[0049] One specific application of the embodiment is that the coagulant is injected into the raw water supply pipe before entering the coagulation tank. The high-speed mixing in the first tank starts the coagulation process. The coagulation tank 2 has a residence time of 2 min, and the coagulant is PAC agent.
[0050] The coagulated raw water then enters the injection tank 3 with micro-sand and flocculant. Dynamic mixing improves the possibility of mutual contact between coagulation solids, high molecular polymers and micro-sand. The injection tank 3 has a residence time of 2 min, and the micro-sand has a particle size of about 100-150 μm, and the flocculant is PAM agent.
[0051] The flocculated water enters the maturation tank 4, and the slow mixing process in the tank promotes the maturation of the flocculation and increases the particles of the flocculation. The micro-sand becomes the core of the newly formed flocculation. The maturation tank 4 has a residence time of 7 min.
[0052] The sand-laden floc achieves high-rate settling in the inclined plate clarifier section. The micro-sand enables the high-rate design of the inclined plate clarifier. The clarified water is then collected through the launder.
[0053] Finally, the abrasion-resistant centrifugal pump draws the sludge from the bottom of the clarifier tank. The hydrocyclone 6 separates the sludge from the reusable micro-sand according to the centrifugal cyclone principle. The micro-sand is discharged from the hydrocyclone 6 underflow for reuse in the injection tank 3. The lighter sludge and most of the water move upward and are discharged from the vortex overflow. The hydrocyclone 6 does not contain any moving parts.
[0054] The use of micro-sand gives the process the advantage of being able to treat a wide variety of raw water. The process produces consistently high quality water due to the generally lower amount of chemicals dosing than conventional treatment. The density and shape of the micro-sand particles increase the efficiency of flocculation and sedimentation. Therefore, even with the addition of lighter solid particles, it is easier and faster to produce large floc. Once the floc is produced and attached to the micro-sand, the floc settles at a rate sufficient to produce high-rate settling. In addition, this sand-laden floc technique is not affected by rapid changes in raw water temperature.
[0055] In the description of the present application, it needs to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0056] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connection" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined, those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.
[0057] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A highly intensive micro-sand flocculation and sedimentation device suitable for offshore platforms, characterized in that, include: The equipment skid-mounted platform (1) also includes a coagulation tank (2), an injection tank (3), a maturation tank (4), a sedimentation tank (5), a hydrocyclone (6), a micro-sand circulation pump (7), and an automatic control distribution cabinet (8) installed on the equipment skid-mounted platform (1). The coagulation tank (2) includes a coagulation tank mixer (21) consisting of a stainless steel shaft and an impeller located at the center of its top. The injection pool (3) includes an injection pool agitator (31) consisting of a stainless steel shaft and an impeller located at the center of its top. The maturation tank (4) includes a maturation tank mixer (41) consisting of a stainless steel shaft and an impeller located at the center of its top. The sedimentation tank (5) includes a sludge scraper (51) consisting of a stainless steel shaft and an impeller located at the center of its top. The hydrocyclone (6) is located above the injection pool (3), and its inlet is connected to the outlet of the micro-sand circulation pump (7). The inlet of the micro-sand circulation pump (7) is connected to the sludge discharge pipe of the sedimentation tank (5).
2. The ultra-intensive micro-sand flocculation and sedimentation device suitable for offshore platforms according to claim 1, characterized in that: The main body of the equipment skid platform (1) and the components on the platform is made of 345R with a thickness of 10mm. Its surface is coated with epoxy zinc-rich, epoxy micaceous iron oxide and polyurethane, and its interior is coated with ceramic paint.
3. The ultra-intensive micro-sand flocculation and sedimentation device suitable for offshore platforms according to claim 1, characterized in that: The equipment skid platform (1) and the connecting pipes of the components on the platform are made of DSS2205. The liquid receiving materials of the coagulation tank mixer (21), injection tank mixer (31), maturation tank mixer (41), and sludge scraper (51) are all DSS2205. The micro sand circulation pump (7) is made of DSS2205.
4. The ultra-intensive micro-sand flocculation and sedimentation device suitable for offshore platforms according to claim 1, characterized in that: The equipment skid platform (1) is divided into a first and a second layer. The coagulation tank (2), injection tank (3), maturation tank (4), sedimentation tank (5) and hydrocyclone (6) are all located on the second layer of the equipment skid platform (1). The micro sand circulation pump (7) and the automatic control power distribution cabinet (8) are located on the first layer of the equipment skid platform (1). The automatic control power distribution cabinet (8) is connected to each electrical equipment.
5. The ultra-intensive micro-sand flocculation and sedimentation device suitable for offshore platforms according to claim 1, characterized in that: The sedimentation tank (5) is provided with a PP inclined plate module (52) at the top. The inclined plate is tilted at 60° to the horizontal plane. The inclined plate module (52) is integrated with an outlet trough at the top. The sludge scraper (51) of the sedimentation tank (5) is driven by a reduction motor.
6. The ultra-intensive micro-sand flocculation and sedimentation device suitable for offshore platforms according to claim 1, characterized in that: The coagulation tank mixer (21) and the injection tank mixer (31) are vertically mounted and driven by a constant speed engine.
7. The ultra-intensive micro-sand flocculation and sedimentation device suitable for offshore platforms according to claim 1, characterized in that: Microsand with a particle size of about 100 to 150 μm is added as an auxiliary material to the injection pool (3).
8. The ultra-intensive micro-sand flocculation and sedimentation device suitable for offshore platforms according to claim 1, characterized in that: The maturation tank mixer (41) is vertically mounted and driven by a variable speed motor, the variable speed drive of which is connected to the main control panel.
9. A super-intensive micro-sand flocculation and sedimentation device suitable for offshore platforms according to claim 1, characterized in that: The micro-sand circulation pump (7) is a slurry pump, and its speed is controlled by a frequency converter.
10. A super-intensive micro-sand flocculation and sedimentation device suitable for offshore platforms according to claim 1, characterized in that: The equipment skid-mounted platform (1) is surrounded by a protective mesh made of SS316L.