Double-swirl smoke and dust removal desulfurization device
For many years, various boilers, kiln, heating furnaces, etc. have been plagued by smoke, dust, desulfurization, decarbonization and denitrification. The main reasons are: unstable flue gas emissions during production; fluctuating flue gas temperatures; and dust removal in exhaust gas. (Coke), smoke (volatiles), sulfur, carbon, and nitrate, and a certain amount of tar is generated, which brings some difficulties to the governance: if a bag filter is used, the tar will quickly block the bag, Or the cloth bag was burned through; if an electrostatic precipitator is used, the electrode part will soon be wrapped by tar and lose its effectiveness, and the sulfur, carbon and nitrate can not be solved, and the one-time investment is large. If a simple spray and water are used, Membrane treatment, smoke and water are not compatible, and the problem of black smoke cannot be solved.
To this end, our company has developed a double-spin double-alkali smoke and dust removal desulfurization and decarbonization and denitrification device (SSTL technology), and has obtained national patents, which can achieve twice the result with half the effort.
2. Governance process and principle:
Under negative pressure, the waste flue gas first enters the first-level dust collector (cyclone diffusion type, which mainly removes soot and coke particles, and the removal rate is> 85%). After the large particles are removed, they enter the heat pipe heat exchanger, which is our patent. (Patent No .: 200520032403.0), (The heat pipe is a super heat-conducting element, which facilitates the rapid reduction of the flue gas temperature and ensures that the waste flue gas temperature is reduced from 600 ° C to 200 ° C. If the flue gas temperature is below 200 ° C, the heat pipe may not be used Heat exchanger), the recovered heat may be used for air preheating, and the introduction of hot air at the bottom of the heating furnace can save 10-15% of fuel, or be used for heating and hot water for heating and showering, and then waste smoke The temperature has been lowered to above 105 ° C (dew point temperature). After passing through the induced draft fan, the waste flue gas from the dynamic pressure head is used to enter the special high-pressure waterfall surface combination device (SSTL technology) to make the exhaust gas under the action of strong alkaline water swirling. The smoke, dust, sulfur, carbon, and nitrate in the agitated physical-chemical processes such as affinity-adsorption-static electricity, and then enter the separator to separate the integrated products, so as to completely perform smoke removal, dust removal, decarbonization, and removal. Nitrate and tar removal to ensure environmental protection Play standards. After the gas and water pass through the dewatering device on the upper part of the separator, the water is intercepted and flows into the bottom of the separator. After the separation of smoke, dust, sulfur, carbon, nitrate, and tar, it is continuously discharged into the circulating pool below. The water in the pool is recycled to save water. Soda water is used to absorb SO2, and lime water is used to flocculate and settle, so that the exhaust gas treatment is stable.
Among them: the two-stage high-pressure waterfall surface smoke and dust removal desulfurization and decarbonization and denitration device is our company's patent (SSTL technology). When the smoke and dust enters the high-pressure rotary spray box body, under the action of a special set of high-pressure waterfall surface nozzles, the smoke and dust airflow makes a strong rotational movement, which is more uniform and more effective than the Venturi mixing, and the head loss is small. It has a strong pushing effect. When the flue gas leaves the rotary jet box, it enters the separator tangentially. The separator is equipped with a central cylinder, so that smoke, dust, sulfur, carbon, nitrate and impurities are formed under the action of centrifugal force. The integrated product is discharged together with water. At the same time, a gas-water separator is arranged on the upper part of the separation cylinder for water vapor separation, and finally enters the chimney to achieve the purpose of smoke removal, dust removal, desulfurization, decarbonization and denitration.
Considering economic operation, the carbon, sulfur, and nitrate are neutralized by the double alkali method [Na2CO3-Ca (OH) 2], and the decarbonization, desulfurization, and denitration rates are> 98%.
Third, the basic characteristics of the governance process:
⒈The process uses heat pipe technology (has been awarded a national patent), which reduces the temperature of the flue gas, ensures that the system does not catch fire, does not expand, and does not dew, and creates conditions for the later wet smoke and dust removal. The recovered heat can be used for hot air blowing at the bottom of the furnace, which saves fuel by 10 to 15%, and has high economic benefits.
⒉This process adopts dry and wet methods to eliminate smoke and dust, give full play to their respective advantages, and promote strengths and avoid weaknesses to ensure the safety, stability and operability of treatment.
工艺 This process combines waterfall technology, impulse technology, and turbulence technology to ensure that smoke, dust, and sulfur emissions meet the standards.
⒋The process uses a special separator to combine the centrifugal structure with the structure of the gas-water separator device to ensure improved purification efficiency and effective separation of gas and water.
装置 The device uses a special waterfall nozzle on the multi-stage rotary spray structure to ensure that the soot and sulfur carbon are efficiently mixed with the alkaline water, so that the sulfur in the flue gas is fully neutralized. Lime is used as a desulfurizing agent and liquid alkali is used as an absorption liquid, so that the desulfurization system does not have scaling or clogging problems. It is safe and reliable, and the reaction speed of sodium alkali and sulfur dioxide is faster than calcium alkali. Therefore, when the liquid gas is relatively small, the desulfurization efficiency Still high.
装置 The device is easy to manage and maintain, has low requirements on the site, and is coated with anti-corrosion and anti-wear coating in the equipment, which has a long service life.
⒎Due to the high-pressure jet effect (SSTL technology), the negative pressure of the system can be increased by 1500-2000Pa, that is, the fan current is reduced by 10% -15%, which plays a huge role in saving electricity, plus the benefit of waste heat recovery, generally within 1 to 1.5 years. investment recovery.
Fourth, the layout and budget of governance equipment:
平面 The layout of the equipment is shown in the attached picture. The cost is calculated according to the specific user.
⒉Control of civil construction costs:
The civil construction part is the responsibility of the user, and the drawings of the pool and the pump and fan base are provided by our company.
Five, equipment model and its use parameters: (SSTL technology)
Exhaust gas (m3 / h)
Exhaust gas temperature (℃)
Induced draft fan power (KW)
Jet size (m)
φ0.5 × 5
φ0.5 × 6
φ0.8 × 8
φ0.9 × 10
Separator size (m)
φ1.5 × 4.5
φ2 × 5.5
φ2.5 × 5
φ2.5 × 6 (double tube)
Rotary expansion dust collector size (m)
φ1.5 × 4
φ2 × 4.5
φ2.5 × 5.5
φ2.5 × 7.5 (double tube)
Heat pipe heat exchanger (° C) and number (number)
300 ～ 650
100 ～ 150
300 ～ 650
150 ～ 200
300 ～ 650
200 ～ 300
300 ～ 650
300 ～ 600
Note: 1. The temperature of the flue gas is ≤3000C, and the heat pipe heat exchanger may not be selected for the treatment process, otherwise it must be selected considering the safe operation of the system.
2. Various fume sources such as boilers, kilns, heating furnaces, etc. are specially designed and manufactured under special circumstances.
3. After treatment, the dust removal rate is> 99.9 ﹪, the smoke removal rate is> 98 ﹪, and the desulfurization, decarbonization, and denitration rates are> 98 ﹪.