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Phone: 13919106009
Email: tujianhua@126.com
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Mr. Lin: 0571-87605270
0571-88834281
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address: Room 1105, Building 8, Taihe Plaza, Shangcheng District, Hangzhou, Zhejiang Province
Efficient steam heating technology of conventional dust collector

★ ash bucket steam heating

00 以上 ,灰斗加热高度只需 1/3 高度。 The smoke temperature of the conventional dust collector is above 100 , and the heating height of the ash hopper is only 1/3 . The ash bucket steam heater is divided into two types: plug-in type and coil type, which are suitable for ash bucket with interlayer and ordinary ash bucket. 每个灰斗插入 3 片。 The plug-in heater is a patented product, which is a finned tube set. Each ash bucket inserts 3 pieces. 的全反射辐射传热强化技术 The coil is arranged on the outer wall of the cone of the ash bucket. Each ash bucket is arranged with 4 pieces. The company's unique total reflection radiation heat transfer enhancement technology is used . The temperature of the ash wall can be maintained  

   

瓷套蒸汽加热 Porcelain sleeve steam heating

The cathode porcelain sleeve steam heater is a circular finned tube heater, which is a patented product of Dika Company, and is arranged in the cathode chamber on the top of the dust collector. 0℃的温度,防止绝缘瓷套结露。 Through natural convection heat dissipation, the air in the porcelain sleeve is heated to maintain a temperature of 90-12 ° C to prevent condensation on the insulated porcelain sleeve. The ring-shaped porcelain sleeve steam heater is a one-piece stainless steel-aluminum finned tube with no welding points inside, long life and no leakage. The electric heater of the cathode porcelain jacket room does not need to be removed.

 

 

常规除尘器蒸汽加热系统 Conventional dust collector steam heating system


The electric heating power of dust ash bucket, cathode porcelain sleeve, ash bucket gasification wind of the power plant is about 200-600KW , and the annual power consumption is 1.5-3.5 million KWH . If steam is used to replace electric heating, the energy saving rate is about 80% , which can significantly reduce heating costs. According to the principle of low-temperature discharge of condensed water after steam heating, the steam heating system of a conventional dust collector is: saturated water heated by the ash bucket and porcelain jacket steam is introduced into the ash bucket gasification steam steam heater, and then discharged after being overcooled. This heating system has the lowest steam consumption.

  




Efficient steam heating technology for low and low temperature dust collector

◆ Low and low temperature dust collector ash bucket steam heating

灰斗加热高度为 2/3 高度。 The low and low temperature dust collector's flue gas temperature is lower than 90 ° C and is below the acid dew point. The ash bucket heating height is 2/3 . The ash bucket steam heater is a coil type and is arranged on the outer wall of the ash bucket cone. Each ash bucket is provided with 4 pieces. ℃的温度。 The temperature of the hopper wall can be maintained at 100-120 ℃. .  

★ Power saving   Replace electric heating and reduce plant electricity. 1200KW A unit of 60 ash buckets can reduce the ash bucket's electric power by 960-1200KW . The cost of heating with electricity is unimaginable.

★ Good heating effect     The radiation reflection technology is used to enhance the heating of the ash bucket by the coil.

   ◆ Insulator purge wind steam heater

The cathode porcelain sleeve and porcelain shaft of the low and low temperature dust collector need to be blown with a hot air of 100-120 ℃ to prevent the flue gas from dew condensation on the inner wall of the porcelain sleeve and the surface of the porcelain shaft. At present, there are two types of insulators , one is a small insulation room with a large number; the other is a large insulation room. There is an insulation room on the left and right of each dust collector, and the porcelain sleeve and porcelain shaft are located in the large insulation room.

  The purge air steam heater is a high-efficiency and safe steam heater. It can be arranged on the top of the dust collector and can be completely heated by steam. It can also be arranged under the dust collector and use a steam-water mixture of saturated water and saturated steam heated by the ash bucket. heating. 2 0% Taking a 600MW unit as an example, the number of insulators is 120-136 , the heating power of purge wind needs 300-340KW , and with steam heating, the steam consumption only needs 450-510kg / h , and the heating cost is only 20 % of the electricity cost .

The purge air steam heater needs to be equipped with a blower to make hot air blow into the insulator. The purge air heater is equipped with a leakage prevention security system and an electric valve, which can be started and stopped remotely.

 

◆ Low and low temperature dust collector steam heating system

蒸汽压力 0.6MPa-1.2MPa 饱和或者过热蒸汽均可。 Deca's original low and low temperature dust collector steam heating system generally uses auxiliary steam or small steam engine exhaust as the heat source. The steam pressure is 0.6MPa-1.2MPa , and saturated or superheated steam can be used. 100-120 First heat the ash hopper so that the temperature of the outer wall of the ash hopper reaches 100-120 . 130 以上,而排水温度一般在 50-100 ℃范围内,不产生闪蒸汽。 The condensed water then passes through the diverter and is introduced into the ash bucket gasification steam steam heater and insulator purge steam steam heater located below the dust collector to heat the temperature of the gasification and purge wind to above 130 , and the drainage temperature is generally at In the range of 50-100 ℃, no flash steam is generated. Drainage can be drained directly into the unit's drainage tank, or it can be drained into the boiler's drain expansion vessel for recycling.

 

Deca's low and low temperature dust collector steam heating system has a heat utilization efficiency of nearly 90% and is by far the most energy-efficient steam heating system.



 

 

Calculation method of steam heating power saving rate

Power generation uses the available energy of steam, and the latent heat of steam cannot be used. The latent heat of the steam is huge and is taken away by the circulating water. If the steam of the power plant is used for heating, it will inevitably generate a certain amount of electricity. Less electricity and loss of condensate is the cost of steam heating.

The steam heating cost is calculated according to its power generation capacity. The condenser expansion temperature is set to 40 ° C, and the dryness is calculated at 90%. The exhaust steam enthalpy is 2350.   kj / kg. Without considering condensate and circulating pump power consumption:

Steam heating cost = power generation capacity (KW) = steam flow * expansion work * electromechanical efficiency (97%)

Expansion work = steam enthalpy-depleted steam enthalpy

Power saving rate = 1-generating capacity / electric heating power

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