The SCR denitration system of Wanchun gas generating set provides a solution for a gas power station

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Recently, the SCR denitrification system of Wanchun gas generator set has provided a solution for a gas power station, and the denitration effect is good. The customer has affirmed the denitration technology of Hebei Hanlan.

A gas power station, as the name suggests, is a power station that uses gas/coalbed methane as the main power source to generate electricity, that is, the energy infrastructure that drives generators to generate electricity through the combustion of gas. When the generator generates electricity, the gas generated by the combustion of gas/coalbed methane will be accompanied by a large amount of high-temperature gas generation during the emission process. Generally, the flue gas temperature can reach 450°C or more. If this high-temperature gas is directly discharged into the atmosphere , It will cause serious environmental pollution.

Therefore, in the process of gas power generation, it is very necessary to denitrify the flue gas emitted by the gas power station. In the denitrification process, it is necessary to strengthen the design of the flue gas denitrification treatment in the power generation process. Effectively add relevant environmental protection work implementation elements to the flue gas denitrification treatment, so as to effectively control the flue gas denitrification treatment measures, and fully implement the environmental protection work.

Wanchun Gas Power Station Denitration Project-SCR Denitration System

The exhaust gas denitrification device (SCR selective catalytic reduction system) designed by Hebei Hanlan converts nitrogen oxides NOX into harmless nitrogen (N2) and water (H2O) under the action of a catalyst. The device is a dedicated integrated denitrification system for distributed energy, which has the following advantages and characteristics:

The flue gas denitration system has high purification efficiency and meets the denitration requirements of the project:

The applicable temperature range is wide, and it can maintain good activity in the treatment temperature zone of 300-550℃;
 Low SO2 conversion rate and low production of NH4HSO4 (ABS);
 Precise calculation and control of urea solution, high-precision metering and injection system, low operating cost;
 The back pressure of the flue gas denitrification system is small, which reduces the impact on the power of the gas generator set;
 The denitration system is installed at a reasonable location, has a small footprint, and is convenient for maintenance and repair;

In addition, Hebei Hanlan has also carried out a series of targeted designs to facilitate users to solve common problems in the use and maintenance of the equipment and the adaptability to environmental conditions.

1. Special design to avoid urea solution crystallization

Because the urea solution crystallization will bring harm to the equipment, Hebei Hanlan has designed the denitration system to avoid the crystallization of the urea solution. In particular, this project is a long-term generator set, and the flue gas temperature is relatively high. Even if crystals appear on the surface of the catalyst, when the flue gas temperature rises, the crystals will gasify and be discharged with the flue gas without affecting the catalyst.

2. Special design for ammonia escape control

Aiming at the problem of ammonia escape control, Hebei Hanlan adopts internationally advanced system control equipment and technology to form a precise reducing agent dosage control system to optimize the amount of reducing agent to the greatest extent, thus successfully controlling ammonia escape.

3. Special design for urea consumption control

Urea consumption is directly related to flue gas volume and NOX concentration. Hebei Hanlan measures, controls and adjusts the injection volume of urea solution through the precise design of the denitration control system, so as to maximize the purification efficiency of the flue gas denitrification device of the gas power station . Meet the increasingly stringent emission targets of users.

4. Special design for urea characteristics and concentration selection

Compared with liquid ammonia and ammonia water, urea is a non-toxic, harmless, and non-hazardous chemical. It has obvious advantages in safety, and users have no risk during use and storage.
The selection of the concentration of urea aqueous solution needs to focus on the temperature of its condensation point (crystallization point) at different concentrations. For example, when the urea solution is at a certain concentration, its condensation point will be in a lower temperature range, while in other concentration conditions The freezing point temperature will increase.

5. Special design for adaptability to local environment

Since the user is located in the mid-latitude inland on the east coast of the mainland, and the eastern part of the province is blocked by mountains, the climate is relatively weakly affected by the ocean. It belongs to a temperate continental monsoon climate with sufficient sunshine throughout the territory and abundant heat resources, but at the same time disasters With the characteristics of frequent weather, "nine droughts in ten years", and large temperature difference between day and night, Hebei Hanlan has carried out a targeted design based on the climate and environment where the project is located. After corresponding treatment, the environmental adaptability of the purification device is very strong. The temperature and humidity of the project location will not affect the equipment, and the device can run for a long time.

In summary, just like the name of the SCR denitration system, the denitration of gas power station is undoubtedly a complex system engineering. Therefore, we strive to optimize the design from all levels of the system to maximize the use and maintenance of the equipment. Provide convenience to the limit, and hope to save users investment and operating costs to the greatest extent, work with users to improve the ecological environment, and realize the beautiful vision of "green water and green mountains".