In the field of waste incineration power generation, precise monitoring of furnace temperature is the core link to ensure stable operation of the process and compliance with pollutant emissions standards. As the core component of contact temperature measurement technology, the thermocouple dedicated to garbage incineration has become a key component of the incineration system due to its high temperature resistance, corrosion resistance, and long service life. This article will systematically analyze the core value of this equipment in the field of waste incineration from three dimensions: technical characteristics, application advantages, and industry value.

1、 Technical feature: Breakthrough performance under extreme working conditions

1. High temperature resistant materials and structural design

The thermocouple of the garbage incinerator is made of special materials such as high chromium cast steel and nickel based alloy, and is manufactured through integral drilling or composite armor process. For example, a certain type of thermocouple uses a high chromium cast steel protective tube, which can withstand long-term damage1200 ℃ high temperature; Another product uses ion implantation tungsten carbide technology to form a 0.5-1.5mm wear-resistant layer on the surface of the stainless steel substrate, significantly improving its resistance to high temperature oxidation. Its structure adopts flange connection or threaded fixation to ensure sealing under high temperature and strong vibration environment of 1350 ℃.

2. Corrosion resistance and wear resistance

For the corrosive environment of sulfur-containing gases, free carbon, and high concentration dust inside the garbage incinerator, the thermocouple outer protective tube is made of nano alloy or high-temperature wear-resistant alloy material. For example, a nano alloy thermocouple developed by a certain enterprise penetrates metal ceramics into nickel based alloys to form a superhard wear-resistant layer that can resist pitting corrosion, crevice corrosion, and intergranular corrosion in chloride media. Some products combine high-temperature alloy matrix with wear-resistant particles through composite casting technology to protect the tubeExcellent wear resistance within the temperature range of 800-1200 ℃.

3. Fast response and high-precision measurement

Thermocouples achieve temperature based on Seebeck effect-Potential conversion, response time can reach millisecond level. For example, the measurement range of K-type thermocouple is -200 ℃ to 1379 ℃, with an error of ± 2.5 ℃, which meets the monitoring requirements of garbage incineration furnace temperature ≥ 850 ℃. Some products have shortened their response time to 0.3 seconds by optimizing the thermocouple wire material and protective tube structure, making them suitable for working conditions with severe temperature fluctuations.

2、 Application advantages: Improve incineration efficiency and equipment reliability

1. Extend equipment lifespan and reduce maintenance costs

Traditional thermocouples are prone to failure in garbage incinerators due to coking and corrosion, with an average service life of onlyFour months. And the dedicated thermocouple has an anti coking design and wear-resistant protective layer, extending its service life to 6-12 months. For example, after adopting wear-resistant thermocouples in a certain garbage power plant, the annual replacement frequency has been reduced from 12 times to 4 times, and maintenance costs have been reduced by 67%. Its quick release structure and multi specification protective tube (diameter 16-38mm) design further shorten the downtime for maintenance.

2. Ensure the stability of incineration process

The furnace temperature is a key parameter for controlling the generation of dioxins. Thermocouples can monitor different heights inside the furnace in real time (from the grate surface)With a temperature distribution of 50-450mm and the use of water-cooled steel casing probe technology, precise measurement of the internal temperature of the bed is achieved. For example, a certain experiment used nickel chromium nickel silicon thermocouples, which were distributed in five layers above the centerline of the third and fourth air chambers to ensure that the average temperature of the furnace was ≥ 850 ℃, effectively suppressing the generation of dioxins.

3. Flexibility to adapt to complex working conditions

Thermocouples support various installation methods such as direct insertion, threaded fixation, and movable flanges, which can adapt to different incinerator structures. For example, a certain type of thermocouple outputs through a built-in transmitter4-20mA signal, achieving long-distance transmission (≥ 1000 meters) and reducing wire errors. Its working temperature range covers -200 ℃ to 1350 ℃, which can simultaneously meet the temperature measurement requirements for the entire process of incinerator start-up, operation, and shutdown.

3、 Industry value: Promoting the upgrading of waste incineration technology

1. Comply with environmental regulations

According to the Regulations on Automatic Monitoring Data for Environmental Management of Domestic Waste Incineration Power Plants, the temperature of the incineration furnace needs to be continuously monitored≥ 850 ℃. The high-precision measurement and long-life characteristics of thermocouples provide reliable data support for environmental supervision. For example, a power plant deployed multiple thermocouples to form a temperature field monitoring system, achieving real-time visualization of furnace temperature and avoiding environmental penalties caused by temperature non-compliance.

2. Reduce energy consumption and carbon emissions

Accurate temperature control can optimize combustion efficiency and reduce auxiliary fuel consumption. For example, a certain garbage incineration plant monitors the temperature distribution in the furnace through thermocouples, adjusts the secondary air ratio, and improves the utilization rate of garbage calorific value15%, reducing carbon dioxide emissions by approximately 20000 tons annually. Its high temperature resistance also extends the life of refractory materials in incinerators and reduces carbon emissions throughout the entire lifecycle.

3. Promote localization and technological innovation

Domestic enterprises have achieved domestic substitution of thermocouples through material research and development and process improvement. For example, platinum rhodium developed by a certain enterprise30 Platinum Rhodium 6 Thermocouple, with an accuracy of ± 0.4% ∣ t ∣ ℃ at 1300 ℃, comparable in performance to imported products. Its modular design supports rapid customization, with a delivery cycle 50% shorter than imported products, significantly reducing industry procurement costs.