A temperature field controlled boiler system

Abstract

The utility model relates to a kind of temperature field controlled boiler systems, the system includes primary air system, secondary air system;The system further includes temperature monitoring device, and the temperature monitoring device is installed on hearth and first flue;Primary air system, secondary air system cooperation constitutes the temperature correction device in hearth and first flue.Introduce temperature monitoring device, the temperature in hearth and first flue is monitored, constructs temperature field, to predict temperature variation trend;Further, based on temperature variation trend to control primary air system, secondary air system, realize primary air / secondary air ratio optimization (including air volume, wind direction etc.), hearth and first flue temperature distribution are corrected in real time, to maintain the stability of hearth and first flue temperature.

Description

Technical Field

[0001] This utility model relates to denitrification technology, specifically to a temperature field control boiler system. Background Technology

[0002] Due to the large fluctuations in the calorific value, moisture content, and complex composition of domestic waste, incineration is unstable and furnace temperature fluctuates greatly, posing the following challenges and urgent problems for owners: Large fluctuations in furnace temperature lead to uneven burning, with the temperature difference between the left and right walls of the furnace often exceeding 100°C, causing water-cooled wall tubes to rupture. It is understood that the cost and loss of a single tube rupture repair is between 500,000 and 8 million yuan. Frequent boiler coking affects combustion efficiency, increases energy consumption, and complicates maintenance.

[0003] Large fluctuations in furnace temperature affect the original values ​​of pollutants. If the temperature is too high, it is difficult to control the amount of thermal NOx generated, resulting in a high risk of exceeding NOx emission standards and putting great pressure on enterprises' environmental protection. If the temperature is too low, combustion is incomplete, which can easily produce a large amount of harmful gases, typically dioxins. The furnace temperature fluctuates greatly, making SNCR operation unstable and making it difficult to capture the appropriate temperature injection point. Injecting the reducing agent at high temperatures promotes NOx formation, while injecting the reducing agent at low temperatures can cause ammonia escape, potentially leading to secondary pollution. Utility Model Content

[0004] In view of the above problems, this utility model proposes a temperature field control boiler system.

[0005] The technical solution of this utility model: A temperature field control boiler system includes a primary air system and a secondary air system; the system also includes a temperature monitoring device installed in the furnace and the first flue; the primary air system and the secondary air system cooperate to form a temperature correction device in the furnace and the first flue.

[0006] To further refine the above technical solution, the temperature monitoring device is an acoustic temperature measuring device or an optical temperature measuring device.

[0007] To further refine the above technical solution, the system also includes a control system, which connects the temperature monitoring device to the primary air system and the secondary air system.

[0008] To further refine the above technical solution, the control system is a control system that adopts a multivariable control algorithm based on CFD simulation.

[0009] The advantages of this utility model are that it has a reasonable design and simple structure. It introduces a temperature monitoring device to monitor the temperature in the furnace and the first flue, construct a temperature field, and predict the temperature change trend. Furthermore, it controls the primary air system and the secondary air system based on the temperature change trend to optimize the primary air / secondary air ratio (including air volume, air direction, etc.) and correct the temperature distribution in the furnace and the first flue in real time to maintain the stability of the furnace and the first flue temperature. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a temperature field-controlled boiler system.

[0011] The diagram shows: 1. Primary air system; 2. Secondary air system; 3. Temperature monitoring device; 4. Furnace; 5. First flue. Detailed Implementation

[0012] As shown in the figure, a temperature field control boiler system includes a primary air system 1, a secondary air system 2, a temperature monitoring device 3, and a control system. The temperature monitoring device 3 is installed on the furnace 4 and the first flue 5. The control system connects the temperature monitoring device 3 with the primary air system 1 and the secondary air system 2. The primary air system 1 and the secondary air system 2 work together to form a temperature correction device in the furnace 4 and the first flue 5. Temperature monitoring device 3 is an acoustic temperature measurement device; The control system is a multivariable control algorithm based on CFD simulation.

[0013] The above embodiments are only for illustrating the technical concept and features of the utility model, and are intended to enable those skilled in the art to understand the content of the utility model and implement it accordingly. They should not be construed as limiting the scope of protection of the utility model. All equivalent changes or modifications made in accordance with the spirit and essence of the utility model should be covered within the scope of protection of the utility model.

Claims

1. A temperature field-controlled boiler system, the system comprising a primary air system and a secondary air system; characterized in that, The system also includes a temperature monitoring device, which is installed in the furnace and the first flue; the primary air system and the secondary air system work together to form a temperature correction device in the furnace and the first flue.

2. The temperature field control boiler system according to claim 1, characterized in that, The temperature monitoring device is an acoustic temperature measuring device or an optical temperature measuring device.

3. The temperature field control boiler system according to claim 1, characterized in that, The system also includes a control system, which connects the temperature monitoring device to the primary air system and the secondary air system.

4. A temperature field control boiler system according to claim 3, characterized in that, The control system is a multivariable control algorithm based on CFD simulation.

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