CN211526720U

CN211526720U - Hot-blast stove with auxiliary heating device

Info

Publication number: CN211526720U
Application number: CN201920975392.1U
Authority: CN
Inventors: 丁睿
Original assignee: Anhui Baihe Environmental Protection Technology Co ltd
Current assignee: Anhui Baihe Environmental Protection Technology Co ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-09-18
Anticipated expiration: 2029-06-26

Abstract

The utility model provides a hot blast stove with an auxiliary heating device, which comprises a stove body, a first burner, the auxiliary heating device and a temperature sensor; the first burner and the auxiliary heating device are arranged on one side of the furnace body, the temperature sensor is arranged on the upper part of the other side of the furnace body, and a PLC (programmable logic controller) is arranged in the auxiliary heating device and used for receiving a temperature sensor signal and dynamically adjusting the material output quantity of the auxiliary heating device; the utility model has the advantages of that: the generated pyrolysis gas can be guided into the hot blast furnace to be fully combusted, and the quantity of input fuel is adjusted according to the real-time temperature in the hot blast furnace by using the auxiliary heating device and the PLC, so that the temperature of high-temperature flue gas output by the hot blast furnace is maintained, the stable proceeding of subsequent processes is ensured, and the problem that the drying efficiency of the drying furnace is influenced due to the unstable yield of the pyrolysis gas is solved.

Description

Hot-blast stove with auxiliary heating device

Technical Field

The utility model relates to a sludge treatment field specifically is a hot-blast furnace with assist heat facility.

Background

The hot blast stove is a thermodynamic machine, is widely applied in China in the end of the 20 th century 70 s, and becomes an upgrading product of an electric heat source and a traditional steam power heat source in many industries. The hot blast stove has various types and complete series, and is divided into a hand-burning furnace and a machine-burning furnace by a coal feeding mode, and is divided into a coal furnace, an oil furnace, a gas furnace and the like by fuel types.

Sludge from sewage treatment plants is a product of sewage treatment, and includes several parts, such as microbial population, organic substances, inorganic substances, and the like. About 5-10 tons of sludge (calculated by water content of 80%) is generated after each ten thousand cubic meters of sewage is treated. The sludge contains toxic and harmful substances such as pathogens, heavy metals, persistent organic matters and the like, is not effectively treated, is very easy to cause secondary pollution to underground water, soil and the like, directly threatens the environmental safety and public health, and greatly reduces the environmental benefit of sewage treatment facilities.

At present, the traditional sludge treatment mode in China has certain limitation. The sanitary landfill can not solve the problem of pollution of sludge to the environment fundamentally, causes serious pollution to urban environment and underground water sources, and the disposal mode of the sanitary landfill is used less and less along with the gradual reduction of the capacity of the existing landfill. The cement kiln has limited doping amount in cooperation with incineration, has great influence on the cement kiln, and has great popularization and application limitations. The anaerobic digestion and the compost have great influence on the surrounding environment, while the domestic sludge has low organic matter content and high operation cost. The drying incineration technology system is simple and easy to implement, but has great influence on incineration equipment, and the doping amount is limited, so that the increasing sludge amount is difficult to meet. The above disposal methods do not completely realize stabilization and recycling of the sludge, and the heavy metals are not completely solidified, so that secondary pollution to the environment is easily caused.

In summary, the sludge treatment and disposal problem becomes a new environmental problem which is highly regarded by all circles of society, the deep dehydration, drying and carbonization integrated sludge disposal technology is developed, the disposal requirements of reduction, harmlessness, stabilization and resource of the sludge are met, a brand new solution technical route is provided, the overall environmental protection requirements of 'green, circulation and low carbon' can be really met, and the method has important significance for solving the treatment problem of the municipal sludge.

Mud need use hot-blast mummification to it to handle at the mummification stage, adopts the hot-blast furnace to provide high temperature working medium usually, and the mode that heats working medium mainly goes on through the fuel burning, like the utility model discloses a multi-fuel hot-blast furnace, including supporting seat and combustion furnace, the inside of supporting seat is equipped with fires burning furnace, the fixed support column that is equipped with in center department of firing burning furnace inner wall bottom, fire burning furnace and constitute by first combustor, second combustor and third combustor, the outer wall of support column passes through the hinge and is articulated with flip, just flip is three. The utility model discloses a through being equipped with servo motor and burning furnace, because burning furnace comprises first combustor, second combustor and third combustor for three kinds of different fuels burn in different combustion chambers, avoided too much fuel to place when using together influence each other, recycle servo motor and drive burning furnace and do reciprocating motion, and burning furnace drives the fuel of inside and do reciprocal upset, can realize the increase of fuel and fire area of contact in the combustion chamber, improved combustion efficiency; then an air heater and an active carbon layer are arranged; the utility model discloses a can adopt multiple fuel to make high temperature working medium simultaneously, nevertheless the pyrolysis gas that produces when the carbonization at mud does not obtain utilizing, and because the production rate of pyrolysis gas is unstable, consequently there is the unstable problem of output hot blast temperature when adopting pyrolysis gas to make fuel.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hot-blast furnace with assist hot device has solved among the prior art problem that the energy consumption is high and tail gas emission is big.

The technical scheme of the utility model is realized like this:

a hot blast stove with an auxiliary heating device comprises a stove body, a first burner and the auxiliary heating device; the first burner is arranged on one side of the furnace body, and the auxiliary heating device comprises a gas storage tank and a valve; the gas storage tank is communicated with the first combustor through a gas pipeline, and a valve is arranged in the gas pipeline.

Preferably, the upper part of the furnace body, which is far away from the combustion chamber, is provided with a temperature sensor, the auxiliary heating device is internally provided with a PLC (programmable logic controller) for receiving a signal of the temperature sensor and dynamically adjusting the material output quantity of the auxiliary heating device, and the valve is controlled by the PLC.

Preferably, a second combustor and a third combustor are arranged on one side of the furnace body, and a fan is arranged in each combustor.

Preferably, one side of the second combustor is communicated with the pyrolysis gas pipeline.

Preferably, an air pipeline is arranged on the outer side of the hot blast stove and is of a U-shaped structure, a fan is arranged on the lower side of the middle of the air pipeline, two ends of the air pipeline are communicated with the hot blast stove through a group of air inlet pipelines, and the power of the fan is controlled by a PLC.

Preferably, a separation wall is arranged in the furnace body to divide the interior of the furnace body into a front section and a rear section, the middle part of the air pipeline is communicated with the front section of the furnace body through a pipeline, and a gap is formed in the middle part of the separation wall;

the fan introduces air into the hot blast stove, and introduces air into different positions in the hot blast stove through a plurality of groups of air inlets, the air is mixed and combusted with pyrolysis gas phase after entering the front section of the stove body, and the air enters the rear section of the stove body and is mixed with combusted flue gas flow, so that the temperature of the flue gas flow is reduced.

Preferably, the separation wall is made of refractory bricks, and the notch is a circular notch.

Preferably, the temperature sensor is a thermocouple.

Compared with the prior art, the utility model has the advantages of as follows: the utility model provides a pair of hot-blast furnace with auxiliary heating device is when carbonizing mud, can fully burn in the leading-in hot-blast furnace of pyrolysis gas that produces to the volume of valve input fuel through in the fuel pipeline, thereby maintain the temperature of hot-blast furnace output high temperature flue gas, guarantee that the stability of follow-up technology goes on, avoided influencing the problem of drying furnace mummification efficiency because of pyrolysis gas output is unstable, also reduced the required energy consumption of mummification and the emission of final tail gas simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the sludge recycling hot blast stove of the present invention;

FIG. 2 is a top view of the hot blast stove for recycling sludge according to the present invention;

FIG. 3 is a front view of the hot blast stove for recycling sludge according to the present invention;

fig. 4 is a left side view of the hot blast stove for recycling sludge.

Reference numbers in the figures: 1-furnace body, 2-temperature sensor, 3-first burner, 4-second burner, 5-air pipeline, 6-fan, 7-air inlet pipeline, 8-isolation wall and 9-third burner.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, pyrolysis gas enters the furnace body 1 through the first burner 3, air is introduced into the front section of the furnace body 1 through the fan 6 and the air pipeline 5 to play a combustion supporting role, the pyrolysis gas and the air are fully mixed by a fan 6, furthermore, the hot blast stove is divided into a front end and a rear end by a partition wall 8 made of refractory bricks, the pyrolysis gas rich in macromolecules is ensured to be completely combusted, an auxiliary heating device is communicated in the stove body 1, the auxiliary heating device comprises a fuel storage tank, a PLC and a temperature sensor 2 arranged at the rear section of the furnace body 1, wherein the PLC can monitor the temperature at the rear section of the furnace body 1 in real time, and once the temperature in the furnace body 1 fluctuates due to the change of the yield of pyrolysis gas, the temperature sensor 2 will feed back the signal to the PLC, the PLC will control the valve in the fuel pipeline, adjust the flow of the fuel gas in the fuel storage tank to maintain the stability of the temperature in the furnace body 1, thereby ensuring that the temperature of the high-temperature tail gas output by the hot blast stove is kept at 200-300 ℃; when the yield of the pyrolysis gas is high, the fuel burnt in the furnace body 1 in unit time is improved, so that the temperature in the furnace body 1 is increased, when the temperature in the furnace body 1 exceeds 300 ℃, the temperature sensor 2 feeds back the measured data to the PLC, the PLC controls a valve in a fuel pipeline, the flow of the fuel gas in a fuel storage tank is reduced, and the temperature in the furnace body 1 is reduced to the range of 200-300 ℃; when the yield of the pyrolysis gas is low, the fuel burnt in the furnace body 1 in unit time is reduced, so that the temperature in the furnace body 1 is reduced, when the temperature in the furnace body 1 is lower than 200 ℃, the temperature sensor 2 feeds measured data back to the PLC, the PLC controls a valve in a fuel pipeline, the flow of the fuel gas in the fuel storage tank is increased, and the temperature in the furnace body 1 is increased to be within the range of 200-300 ℃.

Furthermore, a first burner, a second burner and a third burner 9 are arranged on the hot blast stove; a gas burner and a fan 6 are arranged in the second combustor; pyrolysis gas burners and a fan 6 are arranged in the second combustor 9 and the third combustor 9, wherein the third combustor 9 is a standby combustion chamber.

Furthermore, the combustion chambers are arranged at the front section of the hot blast stove, the fan 6 can introduce excessive air into the hot blast stove through the air pipeline 5, the front section and the rear section of the hot blast stove are respectively provided with an air inlet pipeline 7 communicated with the air pipeline 5, and the air inlet pipeline 7 arranged at the front section of the stove body 1 is used for assisting pyrolysis gas and fuel gas to be fully combusted; meanwhile, the fan 6 can also adjust the amount of air introduced into the rear section of the furnace body 1 according to the temperature in the furnace body 1, so as to adjust the temperature of high-temperature tail gas led out from the furnace body 1; when the temperature of the furnace body 1 is high, the temperature sensor 2 feeds measured data back to the PLC, the PLC controls the fan 6 in the air pipeline 5, the power of the fan 6 is improved, the amount of air to be introduced is increased, and the temperature of high-temperature tail gas is reduced; when the temperature of the furnace body 1 is lower, the temperature sensor 2 can feed measured data back to the PLC, the PLC can control the fan 6 in the air pipeline 5, the power of the fan 6 is reduced, the amount of introduced air is reduced, and the temperature of high-temperature tail gas is improved.

Furthermore, the system adopts PLC programming to realize automatic control, senses the temperature in the furnace body 1 through the temperature sensor 2, and controls the ventilation quantity and the supply quantity of pyrolysis gas of the carbonization equipment through the fan 6. When the temperature of the front section hearth of the furnace body 1 is lower, the valve in the fuel pipeline can be controlled by the PLC to supplement fuel gas, so that the heat supply is increased, and the circulating cold air introduced into the rear section of the furnace body 1 is reduced; when 1 furnace body temperature of furnace body 1 is higher, through PLC control, the valve in the accessible PLC control fuel pipeline preferentially reduces the gas input, only uses the burning of pyrolysis gas to corresponding hot-blast furnace back end increases letting in of air, further reduces burning flue gas temperature.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The hot blast stove with the auxiliary heating device is characterized by comprising a stove body, a first burner and the auxiliary heating device; the first burner is arranged on one side of the furnace body, and the auxiliary heating device comprises a gas storage tank and a valve; the gas storage tank is communicated with the first combustor through a gas pipeline, and a valve is arranged in the gas pipeline.

2. The hot blast stove according to claim 1, wherein a temperature sensor is provided at an upper portion of the stove body away from the combustion chamber, a PLC is provided in the auxiliary heating device for receiving a signal of the temperature sensor and dynamically adjusting the material output of the auxiliary heating device, and the valve is controlled by the PLC.

3. The hot blast stove according to claim 2, wherein a second burner and a third burner are provided on one side of the stove body, and a fan is provided in each burner.

4. The stove according to claim 3, characterized in that the secondary burner is in communication with the pyrolysis gas duct on one side.

5. The hot blast stove according to claim 1, wherein an air duct is provided at an outer side of the hot blast stove, the air duct is of a U-shaped structure, a fan is provided at a lower side of a middle portion of the air duct, two end portions of the air duct are communicated with the hot blast stove through a set of air inlet ducts, and power of the fan is controlled by a PLC.

6. The hot blast stove according to claim 5, wherein a partition wall is arranged in the stove body to divide the stove body into a front section and a rear section, the middle part of the air pipeline is communicated with the front section of the stove body through a pipeline, and a gap is formed in the middle part of the partition wall;

7. The stove according to claim 6, wherein the partition wall is made of refractory brick and the gap is a circular gap.

8. The stove of claim 1, wherein the temperature sensor is a thermocouple.