DY-320 EGSB Reactor Training Platform
Release time：2024-06-29 17:30viewed：times
1. Experimental purpose and principle:
Expanded Granular Sludge Bed (EGSB) was originally developed to change the contact between wastewater and microorganisms and enhance the mass transfer effect through the expansion of granular sludge bed, so as to increase the biochemical reaction rate of the reactor, thereby greatly improving the treatment efficiency of the reactor. The
EGSB reactor obt*ns a higher surface liquid upflow velocity by adopting effluent circulation reflux. The typical feature of this reactor is its effective high height-to-diameter ratio, and a larger height-to-diameter ratio is also required to increase the upflow velocity. The upflow velocity of the EGSB reactor liquid can reach 2.5-10m/h, which is much higher than the upflow velocity of the UASB reactor, which is generally around 1.0m/h. The
basic structure of the EGSB reactor is similar to that of the fluidized bed. As mentioned above, it is characterized by a large height-to-diameter ratio, which can generally reach 3-5, and the height of the reactor of the production device can reach 15-20m.
The top of the EGSB reactor can be open or closed. The advantage of the closure is that it can prevent odor from overflowing, and if it works under pressure, it can even replace the role of the gas cabinet. The EGSB reactor is generally circular. Wastewater enters the reactor from the bottom water distribution pipe system and flows upward through the expanded granular sludge bed area, so that the organic matter in the wastewater is evenly contacted with the granular sludge and converted into methane and carbon dioxide. The mixed liquid rises to the upper part of the reactor and is separated into gas, solid and liquid through the three-phase separator located at the upper part of the reactor. The separated biogas is discharged through the conduit at the top of the reactor or the gas collecting chamber, and the precipitated sludge automatically returns to the expanded bed area, and the supernatant is discharged from the reactor through the outlet channel.
The EGSB expanded granular sludge bed sewage treatment device, its research in technology, process flow, etc., enables students to achieve the following goals:
1. Understand the basic structure of the EGSB reactor;
2. Master the basic operation process of the EGSB expanded granular sludge bed experiment;
3. Deepen the understanding of the basic principles of the EGSB experiment and improve theoretical and practical knowledge.
2. Technical indicators and parameters: Note: (parameters for reference)
1. Ambient temperature: 5℃～40℃
2. Processed water volume: 5～10L/h
3. Influent water quality: CODcr 500～1000mg/L Outlet water quality: CODcr 40～80mg/L
4. Influent water quality: BOD5 250～500mg/L Outlet water quality: BOD5 20～40mg/L
5. Influent suspended solids: SS 150～200mg/L Outlet suspended solids: SS 18～30mg/L
6. pH value: 6.5～8.5
7. Overall dimensions of the device: length×width×height=1500 mm×450 mm×2000mm
8. Working power supply: AC220V±10%, 50Hz, single-phase three-wire system, power 1100W, safety protection: with grounding protection, leakage protection, overcurrent protection
III. M*n configuration:
1. 1 raw water tank: white PP board material, thickness 10mm, 300×400×400mm, a dr*n valve is installed on the bottom plate to facilitate the dr*nage of water;
2. 1 clean water tank: white PP board material, thickness 10mm, 200×400×400mm, a dr*n valve is installed on the bottom plate to facilitate the dr*nage of water;
3. Equipped with 1 raw water tank stirring motor and 1 set of 304 st*nless steel stirring paddles; (power 25W, speed 120rpm), (including 1 speed regulator)
4. 1 set of buffer tank, transparent plexiglass material, wall thickness 10mm, 250×250×350mm,
5. 1 set of EGSB sludge bed, with jacket insulation, transparent organic glass material, wall thickness 6mm, specification: Ø150×1800mm, accessories include: 1 set of st*nless steel heating constant temperature water bath, 1 set of heating constant temperature water jacket (generally m*nt*ned at 35-45 degrees), 1 circulating constant flow water pump (maximum head 10m, rated flow 12L/min, power 90W), 1 set of temperature control system (temperature control accuracy: ±1℃), 1 PT100 temperature sensor
; 6. 1 thickening tank, transparent organic glass material, wall thickness 8mm, specification: Ø250×400mm,
7. 2 sets of anti-corrosion lifting magnetic water pumps, flow: 16~19 (L/min), head: 2.7~3.4 (m) power 20W;
8. Flow measurement and regulation: 1 water inlet flowmeter, (LZB-10, range 1~10L/h)
9. 1 biogas flowmeter,
10. 1 set of programmable automatic controller,
11. Power supply control system: 1 double-sided matte dense-gr*ned spray-coated electric control box, leakage protector (Delixi brand), voltmeter, lockable push button switch, wire pipe, etc.
12. Matching UPVC connecting pipes and valves (Zhongc* brand).
13. St*nless steel frame test bench (30mm×30mm st*nless steel square tube, equipped with universal casters with locking feet), etc.
14. Virtual simulation software for electrical installation of building buildings and intelligent buildings Based on unity3d design, users can choose different sizes of interactive interfaces according to computer configuration, and can choose six levels of image quality. The model in the software can be rotated 360°, enlarged, reduced, and translated. There are assistant prompts during the use of the software, as follows: A. Wet alarm system 1. System overview: Overview of wet alarm system
2. Equipment recognition: It has the best viewing angle, equipment det*ls (displaying the introduction or parameters of the equipment), exercises (built-in 6 multiple-choice questions, with prompts for correct and incorrect choices), and schematic diagrams (you can enter the equipment from the schematic diagram). The equipment includes: sprinklers, water flow indicators, signal butterfly valves, exhaust valves, fire alarm controls, high-pressure gauges, high-level water tanks, Wia control cabinets, pressure-stabilizing tanks, flow switches, terminal water testing devices, dr*nage facilities, water pump connectors, hydraulic alarms, time delays, wet alarms, butterfly valves, check valves, fire pumps, safety pressure-stabilizing valves, and fire water tanks.
3. Principle display: Displays the working principle of the wet alarm system, 3D animation demonstrations, and semi-transparent 3D models , so you can see the internal water flow. Equipped with practice module (built-in 4 multiple-choice questions, with prompts for correct and wrong choices)
4. Design layout: There are multiple-choice questions and calculation questions, each of which is scored, and the correct answer and score will be displayed after submission
B. Gas fire extinguishing system
1. System overview: Overview of gas fire extinguishing system
2. Equipment recognition: It is equipped with the best viewing angle, equipment det*ls (displaying the introduction or parameters of the equipment), practice (built-in 8 multiple-choice questions, with prompts for correct and wrong choices), schematic diagram (you can enter the equipment from the schematic diagram). The equipment includes: nozzle, HFC-227 storage bottle, bottle head valve, heptafluoropropane check valve, high-pressure hose, gas check valve, safety valve, weighing alarm, electromagnetic starter, selection valve, smoke alarm, fire alarm controller.
3. Principle display: Display the working principle of the gas fire extinguishing system, 3D animation demonstration, 3D model is semi-transparent, and the internal gas can be seen. Equipped with practice module (built-in 3 multiple-choice questions, with prompts for correct and wrong choices)
4. Design and layout: There are 6 multiple-choice questions, each with scores, and the correct answer and score will be displayed after submission
. C. Escape drill: Teaching in the form of fun games, escape from the burning room within a limited time, and wrong choices will directly enter the score interface.
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