Denitrification of Steam Boilers

The metering and distribution system mainly includes devices such as electric control valves, electromagnetic flow meters, solenoid valves, pressure reducing valves, filters, distributors, float flow meters, and pressure gauges.

The PLC metering and distribution module integrates these components into a single module, while also housing the PLC control system and touch screen within the module. This module serves as the core control unit of the entire denitrification system and is a product independently developed and designed by our company. Through multiple iterations and continuous optimization, the module has incorporated control and interlock protection concepts, making the equipment highly automated, safe, and stable. According to customer feedback, our denitrification equipment leads the industry in both user experience and appearance.

This module has 6 injection points, corresponding to six denitrification spray guns. The maximum flow rate for each branch is 100 L/h, and the flow rate of each branch is adjustable.

1. Main Functions

1. Filters the compressed air used in the denitrification system to remove condensed water from the pipelines.

2. Regulates the pressure of the compressed air.

3. Filters solid impurities from the reducing agent to prevent pipeline blockages and damage to control components.

4. Controls and measures the usage of compressed air and the reducing agent, and distributes both.

5. Delivers compressed air and the reducing agent to downstream equipment through multiple channels, at equal pressure and independently.

6. Records, stores, and processes data such as pressure and flow during equipment operation, automatically generating tables or curves for user reference.

2. Working Principle
The reducing agent passes through a pressure gauge, flow sensor, electric actuated ball valve, and angle seat valve in sequence. It is metered and output according to the flow rate set by the control system. After distribution, pressure stabilization, and buffering, it is delivered to the reducing agent outlet pipeline at the same pressure via adjustable float flow meters.

Compressed air is filtered by a precision filter and then passes through a pressure gauge, flow sensor, solenoid valve, and air source processor before entering the compressed air distributor. It is then delivered to the compressed air outlet pipeline at the same pressure via ball valves.

The PLC control system can control the booster pump, control valve, reducing agent solenoid valve, and compressed air solenoid valve via the touch screen, while monitoring the reducing agent flow rate using rotor flow meters. The PLC control system can also adjust the electric actuator based on the set reducing agent flow rate, valve opening, or nitrogen oxide concentration to meet the required specifications.

3. Scope of Application:

① Chain grate boilers, circulating fluidized bed boilers;

② Hot water boilers, steam boilers, thermal oil heaters;

③ Pulverized coal boilers, biomass boilers, gas boilers, waste incinerators;

④ Ceramic kilns, cement rotary kilns, lime kilns, steel rolling kilns.

Industries: Heating, papermaking, printing and dyeing, washing, ceramics, cement, food, chemical, pharmaceutical, steelmaking, and many other industries.

4. Equipment Dimensions

5. Product Appearance

Ms. Fu I7324005195

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