RTO regenerative catalytic oxidation equipment
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  • RTO regenerative catalytic oxidation equipment

RTO regenerative catalytic oxidation equipment

The organic waste gas is heated to above 760 ℃, so that the volatile organic compounds in the waste gas (VOCs,Volatile Organic Compounds) is oxidized and decomposed into carbon dioxide and water in the combustion chamber. Oxidation of high temperature gas flow through the special ceramic heat storage body, so that the ceramic body temperature and "heat storage", the next process is the exhaust gas from the "heat storage" of the ceramic through the ceramic, the heat transfer to the exhaust gas, organic waste gas through the ceramic as a heat exchanger carrier, repeated heat exchange, so as to save the fuel consumption of exhaust gas heating, reduce operating costs. Under the condition of medium and high concentration, RTO can output waste heat to the outside, and use it in the form of steam, hot air, hot water, etc., to achieve economic benefits while meeting environmental protection goals. The incinerator is mainly composed of ceramic heat storage bed, combustion chamber, burner and electrical control system. The RTO equipment is designed as a three-bed structure, which has the characteristics of high removal efficiency, stable operation and low energy consumption. The exhaust gas containing volatile organic compounds (VOCs) enters the heat storage bed of RTO through the switching of the valve. The exhaust gas is gradually heated by the heat storage ceramic and enters the combustion chamber. VOCs are oxidized at high temperature in the combustion chamber and release heat. When passing through another heat storage bed, the hot air is heat exchanged with the accumulated ceramic to accumulate heat to reduce the consumption of auxiliary fuel. heat storage While the ceramic is heated by hot air, the temperature of the oxidized clean gas gradually decreases, making The outlet temperature is slightly higher than the RTO inlet temperature. Through the switching of pneumatic valves at the bottom of different heat storage beds, the direction of exhaust gas entering the ceramic is changed, and the alternating conversion between the heat storage zone and the heat release zone is realized. When the concentration of VOCs in the system is high enough and the heat energy released is enough, RTO can maintain the oxidation and decomposition conditions of VOCs without fuel, and can output the waste heat of the system to the outside. The heat balance equation is shown in the following figure. RTO equipment in the work, through the following two processes. (1) Cold start preheating state; Fresh air directly enters the RTO main body for preheating. After a certain time T, the inlet and outlet valves automatically switch, and the gas changes its flow direction between beds A, B and C. This process operation evacuates residual organic exhaust gases that may be trapped inside the RTO equipment to avoid hazards during ignition. After 5-10 minutes, the combustion system is turned on by PLC control, the burner system starts to ignite automatically, and the temperature of the regenerative ceramic packed bed gradually rises. After about 3 hours, the top of the ceramic bed reaches about 800 ℃, and the middle reaches about 450 ℃, bottom about 100 ℃. At this point, the preheating process ends. (2) Operation state After the preheating process is completed, RTO enters the operation state. The organic waste gas passes through the ceramic heat storage bed A and is gradually preheated to its spontaneous combustion temperature. Oxidation reaction occurs in the combustion chamber to generate CO and H? O, Then enter the ceramic heat storage bed B to release heat and accumulate heat in the ceramic heat storage bed B. At this time, the C bed is purged, the temperature of the and B heat storage beds gradually decreases from top to bottom, the, B and C beds are switched according to the period T, and the treated flue gas enters the discharge chimney.

Key words:

Biochemical treatment equipment

Flotation equipment

Classification:

RTO regenerative catalytic oxidation equipment

RTO heat storage bed working state periodic table


Time T 2T 3T
A bed Intake Purging out of gas Intake Purging out of gas Intake Purging out of gas
Bed B out of gas Intake Purging out of gas Intake Purging out of gas Intake Purging
Bed C Purging out of gas Intake Purging out of gas Intake Purging out of gas Intake

Common size table/Common Specification size table


Air volume (Nm" h) (Nm" h) 两室RTO占地(m²) Two rooms RTO covers(m²) 三室RTO占地(m²) Three-room RTO covers an area(m²)
5000 4 × 2 7 × 2
10000 6 × 2.7 8.7 × 2.7
20000 7.5 × 3 11x3
30000 9 × 3.2 13.5 × 3.2
40000 10 × 4.2 14 × 4.5
50000 11 × 4.5 15 × 4.5
60000 11 × 5.6 16 × 5.6

 

性 能 特 点 /The Performance characteristics of


RTO uses high-efficiency heat storage ceramics for heat storage and heat release to realize heat conversion. Heat storage ceramics are customized high-efficiency ceramics with low wind resistance, high thermal efficiency and excellent thermal shock resistance. The heat storage ceramic adopts a special customized U-shaped groove structure, which can reduce the resistance of the heat storage ceramic area by more than 30%, reduce the power consumption of the system fan, and redistribute the exhaust gas in the flow process to ensure uniform gas flow in each area of the heat storage bed.

The inside of the RTO box adopts a high-alumina aluminum silicate fiber insulation module with a maximum insulation thickness of 250mm, and the insulation effect is better than that of ordinary aluminum or high-purity fiber cotton. Thermal insulation shall be carried out in accordance with the requirements of GB4272 General Principles for Thermal Insulation Design of Equipment and Pipes, and warning signs shall be set at high temperature parts. Use a thermal imager to actually measure the external surface temperature: the external surface temperature shall not be higher than the ambient temperature by 40 ℃ (except for the burner part).

The burner system is a well-known foreign brand, international FM certification, and customized products for the company. The burner is a continuous proportional adjustment type (automatically adjust the gas volume according to the needs of the system), with a metal safety valve, with a large adjustment ratio, the fuel is fully burned, and no secondary pollution of NOx and CO is formed. The combustion chamber is provided with a viewing hole (mirror), Safe and reliable, long service life. The fuel and gas pipeline of the burner system adopts European standard design, double shut-off valve design, flame UV detector and Honeywell controller. The proportional regulating valve adjusts its opening according to the temperature change required by the furnace, saves fuel, and synchronously adjusts the flow of fuel and combustion-supporting air to maintain a certain proportion and achieve stable and complete combustion. The fuel gas pipeline contains a pressure regulator valve to stabilize the gas supply pressure and also contains high and low pressure protection. If the front pressure is too low or too high due to problems with the pipeline or valve in front of the burner, the low pressure or high pressure protection is opened and the solenoid valve automatically cuts off the fuel. The UV flame detector senses the flame of the burner at all times. During normal combustion, the flame signal shows that when there is no flame, the solenoid valve in the fuel supply pipeline is closed; when the combustion flame is extinguished, the solenoid valve in the fuel supply pipeline automatically closes and cuts off the fuel. Safety protection. The in-place signal of the main shut-off valve of the burner is connected with the PLC control, and the alarm will be given immediately if the valve is not closed in place.

● The metal-to-metal airtight and almost zero-leakage double-disc design switching valve design can achieve 99% VOC removal efficiency without the need for additional purge storage tanks or other equipment.

● Removal efficiency meets environmental regulations.

● The flexibility of the system can meet a wide range of process conditions, and can easily control multiple process waste gas sources.

● The customized thermal storage ceramic layer can provide 95% heat recovery, and its pressure drop is small, reducing the power demand of the fan.

● Excellent cost performance.

● Short time required for system installation.

● It takes up less space.

 

Scope of application/Scope of application/


It is suitable for the treatment of mixed combustible organic waste gas and odor with medium and large concentration (thousands of ppm) and medium air volume. The waste gas treatment of electronic products manufacturing and integrated circuits. The waste gas treatment of printing process and injection molding process. The treatment of organic waste gas generated by petrochemical, medical and other industries

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