CN-224230677-U - Intelligent heating system based on carbon circulation

CN224230677UCN 224230677 UCN224230677 UCN 224230677UCN-224230677-U

Abstract

The utility model belongs to the technical field of industrial heating furnaces, and relates to an intelligent heating system based on carbon circulation, which comprises a gas system, a carbon circulation system, an oxygen system, a flue gas system, a heating furnace body and a heating section heating system; the gas system comprises a gas cold conveying pipeline and a gas hot conveying pipeline, the carbon circulating system comprises a first flue gas regulating and cutting valve, a circulating flue gas cold conveying pipeline and a circulating flue gas hot conveying pipeline, the oxygen system comprises an oxygen conveying pipeline, the flue gas system comprises a flue gas waste heat recovery flue, a second flue gas regulating and cutting valve and a chimney, at least one section of heating section heating system is arranged in the heating furnace body, a flue gas outlet of the heating furnace body is connected with an inlet of the flue gas waste heat recovery flue, an outlet of the flue gas waste heat recovery flue is also connected with the first flue gas regulating and cutting valve, an outlet of the oxygen conveying pipeline is connected to the circulating flue gas cold conveying pipeline so as to be mixed with circulating flue gas, and the circulating flue gas hot conveying pipeline and the gas hot conveying pipeline are both connected to the heating system.

Inventors

WANG HUIYAO
HAN XIAOREN
LIU FENGYI
ZHAO JIANMING
JIANG SHILONG
LEI WEI

Assignees

重庆赛迪热工环保工程技术有限公司

Dates

Publication Date: 20260512
Application Date: 20250516

Claims (10)

1. An intelligent heating system based on carbon circulation is characterized by comprising a gas system, a carbon circulation system, an oxygen system, a flue gas system, a heating furnace body and a heating section heating system; The gas system comprises a gas cold conveying pipeline and a gas hot conveying pipeline which are sequentially connected along the gas flowing direction; The carbon circulation system comprises a first flue gas regulating and cutting valve, a circulating flue gas cold conveying pipeline and a circulating flue gas hot conveying pipeline which are sequentially connected along the flue gas flowing direction; The oxygen system comprises an oxygen delivery conduit; The flue gas system comprises a flue gas waste heat recovery flue, a second flue gas regulating and cutting valve and a chimney which are sequentially connected along the flue gas flowing direction; Wherein, at least one section of heating section heating system is arranged in the heating furnace body, and a smoke outlet of the heating furnace body is connected with an inlet of the flue gas waste heat recovery flue; The outlet of the flue gas waste heat recovery flue is also connected with a first flue gas regulating and cutting valve so as to divide the discharged flue gas into two paths for discharging and circulating respectively, the outlet of the oxygen conveying pipeline is connected to the circulating flue gas cold conveying pipeline so as to be mixed with the circulating flue gas to form simulated air or simulated oxygen-enriched air, and the circulating flue gas hot conveying pipeline and the coal gas hot conveying pipeline are both connected to the heating section heating system.
2. The intelligent heating system of claim 1, wherein the oxygen system further comprises an oxygen electric butterfly valve, an oxygen regulating shut-off valve, and an oxygen flow detection device sequentially arranged on the oxygen delivery pipe along the oxygen flow direction.
3. The intelligent heating system according to claim 2, wherein the gas system comprises a gas electric butterfly valve, a gas electric blind plate valve, a gas regulating shut-off valve and a gas flow rate detection device which are sequentially arranged on the gas cold conveying pipeline along the gas flow direction.
4. The intelligent heating system of claim 3, wherein the gas regulating shut-off valve is in an interlocked relationship with the first flue gas regulating shut-off valve and the oxygen regulating shut-off valve, and wherein the first flue gas regulating shut-off valve and the oxygen regulating shut-off valve are opened in synchronism as the valve opening of the gas regulating shut-off valve is increased.
5. The intelligent heating system of claim 4, wherein the first flue gas control shut-off valve and the oxygen control shut-off valve automatically adjust the degree of opening and closing according to the value of the gas flow detection device and are confirmed by the value feedback comparison of the circulating flue gas flow detection device and the oxygen flow detection device.
6. The intelligent heating system of claim 1, wherein the first fume adjustment shut-off valve is in an interlocking relationship with the second fume adjustment shut-off valve, and wherein the second fume adjustment shut-off valve opening is synchronously decreased as the first fume adjustment shut-off valve opening increases.
7. The intelligent heating system of claim 1, wherein the flue gas waste heat recovery flue in the flue gas system is connected with the first flue gas adjusting shut-off valve and the second flue gas adjusting shut-off valve through a flue gas conveying pipeline, and a flue gas exhausting fan is arranged on the flue gas conveying pipeline and used for ensuring smooth discharge of flue gas.
8. The intelligent heating system of claim 1, wherein a gas preheater is provided between the gas cold feed line and the gas hot feed line to preheat the gas.
9. The intelligent heating system of claim 8, wherein a flue gas preheater is provided in the circulating flue gas cold transfer duct and the circulating flue gas hot transfer duct to preheat simulated air or simulated oxygen enriched air.
10. The intelligent heating system of claim 9, wherein the gas preheater and the flue gas preheater are disposed in the flue gas waste heat recovery stack to recover waste heat of the exhaust flue gas.

Description

Intelligent heating system based on carbon circulation Technical Field The utility model belongs to the technical field of industrial heating furnaces, and relates to an intelligent heating system based on carbon circulation. Background Under the large background of actively coping with climate change and promoting green low-carbon development worldwide, energy conservation and emission reduction become important development targets in the industrial fields of various countries. The national importance is also high, and the industrial industry is guided to change to the green, low-carbon and sustainable direction by putting out a series of policy and regulations. As early as 2007, an energy-saving and emission-reduction comprehensive working scheme is issued, the scheme definitely proposes an energy-saving and emission-reduction initiative, and a direction is indicated for energy-saving and emission-reduction work in the industrial field of China, so that the energy consumption and pollutant emission of various industries are promoted to be reduced, and benign interaction of economic development and environmental protection is realized. Along with the proposal of the 'double carbon' target, china is continuously deepened in the aspect of carbon emission management. The 2025 reports the national carbon emission rights trade market covering the working scheme of the steel, cement and aluminum smelting industry. According to the notification, three industries of steel, cement and aluminum smelting are formally brought into the national carbon emission right trading market management category. The greenhouse gas species which are brought into management at this time comprise carbon dioxide (CO 2), carbon tetrafluoride (CF 4) and carbon hexafluoride (C 2F6), which marks an important step in the field of carbon emission control in China, further strengthens carbon emission constraint on important industries, and promotes enterprises to take measures actively to reduce carbon emission. The steel industry is taken as an important basic industry in China, and plays a significant role in the national economy development. However, the iron and steel industry is also a large household of energy consumption and pollutant emission, and the energy conservation and emission reduction tasks in the production process are difficult. In many production links of the steel industry, the heating furnace is a key energy consumption device and plays an important role in energy conservation, emission reduction and carbon reduction. The energy consumption level of the heating furnace directly influences the production cost and the energy utilization efficiency of steel enterprises, and simultaneously, the discharged pollutants and greenhouse gases also exert great pressure on the environment. At present, the heating process routes of the heating furnace have certain differences, and part of the process routes have low energy utilization rate due to the reasons of technical lag, unreasonable design and the like, so that not only is the energy wasted, but also the production cost of enterprises is increased. In addition, some traditional processes can generate more pollutant and greenhouse gas emission in the running process, and the traditional processes are not suitable for the current energy-saving emission-reduction and low-carbon development requirements. Therefore, the reasonable, advanced and mature heating system is developed, and has important significance for realizing the aims of energy conservation, emission reduction and carbon reduction in the iron and steel industry. By optimizing the heating system, the energy utilization efficiency is improved, the emission of pollutants and greenhouse gases is reduced, the production cost of enterprises can be reduced, the market competitiveness is enhanced, and the method can make positive contribution to realizing the 'double carbon' target and promoting the industrial green development in China. Disclosure of utility model Accordingly, the present utility model is directed to an intelligent heating system based on carbon circulation to reduce the carbon emission problem of the heating furnace. In order to achieve the above purpose, the present utility model provides the following technical solutions: An intelligent heating system based on carbon circulation comprises a gas system, a carbon circulation system, an oxygen system, a flue gas system, a heating furnace body and a heating section heating system; The gas system comprises a gas cold conveying pipeline and a gas hot conveying pipeline which are sequentially connected along the gas flowing direction; The carbon circulation system comprises a first flue gas regulating and cutting valve, a circulating flue gas cold conveying pipeline and a circulating flue gas hot conveying pipeline which are sequentially connected along the flue gas flowing direction; The oxygen system comprises an oxygen delivery conduit; The flue gas system