CN217490370U

CN217490370U - SNCR (selective non-catalytic reduction) denitration device for high-temperature shuttle kiln

Info

Publication number: CN217490370U
Application number: CN202221131985.8U
Authority: CN
Inventors: 司学歌; 殷培义; 边敦超; 马家俊
Original assignee: Zibo Kehao Thermal Engineering Co ltd
Current assignee: Zibo Kehao Thermal Engineering Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-09-27
Anticipated expiration: 2032-05-11

Abstract

The utility model relates to a SNCR denitrification facility for high temperature shuttle kiln, including shuttle kiln, shuttle kiln is equipped with the exhaust port, the exhaust port is connected with fires burning furnace, be equipped with 2 combustors in firing burning furnace, the front portion of combustor is equipped with the cooling air distribution port, the rear portion of combustor is equipped with reduction chamber, both ends top is equipped with the transfer line about reduction chamber, the bottom of every transfer line all is fixed with the conveyer pipe that sets up along the fore-and-aft direction, the bottom of conveyer pipe is fixed with a plurality of atomizer along the fore-and-aft direction, the combustor left end is equipped with the outlet flue, the outlet flue is connected with smoke exhaust fan, smoke exhaust fan is connected with the chimney, reduction chamber and cooling air distribution port department all are equipped with temperature sensor. The utility model discloses burning furnace is fired in the exhaust port setting of shuttle kiln, sets up the reduction chamber at the combustor rear portion that fires burning furnace, opens through opening of control distribution port and stops the temperature control in the appropriate scope in reduction chamber to can spout the reductant in the reduction chamber and take off the round pin, it is better to take off the round pin effect, and the cost is lower.

Description

SNCR (selective non-catalytic reduction) denitration device for high-temperature shuttle kiln

Technical Field

The utility model relates to a SNCR denitrification facility for high temperature shuttle kiln belongs to shuttle kiln denitration technical field.

Background

In the production of inorganic non-metallic materials, various types of kilns are required to carry out high-temperature calcination treatment, and according to related researches, N, O elements in the air begin to react to generate a large amount of nitrogen oxides when the kiln firing temperature reaches above 1350 ℃.

At present, a firing kiln in inorganic nonmetal industry mainly adopts gas and electric heating modes to realize high-temperature calcination, wherein under an electric heating mode, a shuttle kiln does not discharge waste gas, and denitration treatment is basically not considered. In the gas shuttle kiln, a large amount of flue gas is generated due to fuel combustion and needs to be discharged out of the kiln, so that the tail gas denitration treatment problem needs to be considered in the part of the kiln.

The nitrogen oxide treatment has many treatment modes, generally adopts SCR technology and SNCR technology, and SCR technology treatment is reliable and stable in operation, but construction and operation cost are too high, occupation space is big, and burden is heavier for general users, and the customer is forbidden to this mode.

The SNCR technology is simple to build and low in cost, but is only mature and reliable to apply in a continuous kiln, and a client also applies the treatment mode in a shuttle kiln system. The technology has two core points, wherein one is a suitable temperature window which means the temperature range of 850-1100 ℃; the other is a "reducing agent" which refers to a substance such as ammonia, urea or hydrogen ammonia which can react with nitrogen oxides. The SNCR technology has the advantages of low reducing agent cost and low application cost, and the SNCR technology has wide and mature application in the industries of tunnel kilns and roller kilns, but because of the characteristics of shuttle kilns, a periodic temperature rise and drop process exists in the production process, so that a temperature window does not exist, the treatment effect in the shuttle kilns is not ideal, and the standard emission of tail gas is difficult to realize.

SUMMERY OF THE UTILITY MODEL

The utility model provides a SNCR denitrification facility for high temperature shuttle kiln solves among the present high temperature shuttle kiln denitration treatment effect very unsatisfactory, hardly realizes the problem of discharge to reach standard of tail gas.

The utility model relates to a SNCR denitrification facility for high temperature shuttle kiln, including the shuttle kiln, the shuttle kiln is equipped with the exhaust port, the exhaust port is connected with fires burning furnace, be equipped with 2 combustors in firing burning furnace, the front portion of combustor is equipped with the cooling air distribution port, the rear portion of combustor is equipped with reduction chamber, both ends top is equipped with the transfer line about reduction chamber, the bottom of every transfer line all is fixed with the conveyer pipe that sets up along the fore-and-aft direction, the bottom of conveyer pipe is fixed with a plurality of atomizer along the fore-and-aft direction, the combustor left end is equipped with the outlet flue, the outlet flue is connected with smoke exhaust fan, smoke exhaust fan is connected with the chimney, reduction chamber and cooling air distribution port department all are equipped with temperature sensor.

The cooling air distribution port is connected with a cooling pipe, a first electromagnetic valve is arranged on the cooling pipe, the cooling pipe is connected with a cooling fan, the outer end of a liquid conveying pipe is connected with a liquid inlet pipe, the liquid inlet pipe is connected with a conveying pump, an air inlet pipe is further connected onto the liquid inlet pipe, a pressure pump is connected to an air inlet pipe, liquid pressure can be increased to be better sprayed out, a second electromagnetic valve is arranged on the liquid inlet pipe, the first electromagnetic valve and the second electromagnetic valve are connected with a controller, and the controller is connected with a temperature sensor and a combustor in the reduction cavity and the cooling air distribution port. Can be automatically regulated and controlled, and ensures the temperature in the reduction cavity to be stable.

The conveying pipes on the left side and the right side are not on the same horizontal plane. When the reducing agent is sprayed, the reducing agent can be more uniformly contacted with the flue gas, so that the flue gas is prevented from being leaked and sprayed.

Be connected with defeated tobacco pipe between the outlet flue of firing burning furnace and the smoke exhaust fan, be fixed with a plurality of annular cooling tuber pipes on the inner wall of defeated tobacco pipe, the center department of cooling tuber pipe is equipped with hollow defeated wind cylinder, many connecting pipes of fixedly connected with between defeated wind cylinder and the cooling tuber pipe, be equipped with exhaust vent one on connecting pipe and the cylindrical lateral wall of defeated wind, evenly be equipped with exhaust vent two on the outer wall of cooling tuber pipe towards centre of a circle one side. Can cool down exhaust flue gas, reduce the damage to smoke exhaust fan.

An air delivery pipe is fixed at the outer end of the cooling air pipe.

The utility model discloses, following beneficial effect has:

the smoke outlet of the shuttle kiln is provided with the combustion furnace, the rear part of the combustor of the combustion furnace is provided with the reduction cavity, and the temperature of the reduction cavity is controlled in a proper range by controlling the starting and stopping of the air distribution port, so that the reducing agent can be sprayed in the reduction cavity for denitration, the denitration effect is better, and the cost is lower.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 1;

FIG. 4 is a schematic structural view of a cooling air duct;

in the figure: 1. a shuttle kiln; 2. cooling the air distribution port; 3. a burner; 4. a delivery pipe; 5. an atomizing spray head; 6. a transfusion tube; 7. a liquid inlet pipe; 8. a combustion furnace; 9. a wind delivery pipe; 10. cooling the air pipe; 11. a smoke conveying pipe; 12. a smoke exhaust fan; 13. a chimney; 14. a wind delivery cylinder; 15. and the connecting pipe 16, the air outlet II, the air outlet 17 and the air outlet I.

Detailed Description

The present invention will be further described with reference to the following examples.

Embodiment 1, as shown in fig. 1 to 2, the utility model discloses a SNCR denitrification facility for high temperature shuttle kiln, including shuttle kiln 1, shuttle kiln 1 is equipped with the exhaust port, the exhaust port is connected with fires burning furnace 8, be equipped with combustor 3 in firing burning furnace 8, the front portion of combustor 3 is equipped with cooling air distribution port 2, the rear portion of combustor 3 is equipped with the reduction chamber, both ends top is equipped with transfer line 6 about the reduction chamber, the bottom of every transfer line 6 all is fixed with conveyer pipe 4 along the fore-and-aft direction setting, conveyer pipe 4's bottom is fixed with a plurality of atomizer 5 along the fore-and-aft direction, 3 left ends of combustor are equipped with the outlet flue, the outlet flue is connected with smoke exhaust fan 12, smoke exhaust fan 12 is connected with chimney 13, reduction chamber and cooling air distribution 2 department all are equipped with temperature sensor.

The cooling air distribution port 2 is connected with a cooling pipe, a first electromagnetic valve is arranged on the cooling pipe, the cooling pipe is connected with a cooling fan, the outer end of the liquid conveying pipe 6 is connected with a liquid inlet pipe 7, the liquid inlet pipe 7 is connected with a conveying pump, a second electromagnetic valve is arranged on the liquid inlet pipe 7, the first electromagnetic valve and the second electromagnetic valve are connected with a controller, and the controller is connected with a temperature sensor and a combustor 3 at the reduction cavity and the cooling air distribution port 2.

The conveying pipes 4 on the left and right sides are not on the same horizontal plane.

When the shuttle kiln 1 works, a product is heated by the shuttle kiln 1, when the shuttle kiln 1 is heated, the combustor 3 at the position of the combustion furnace 8 is started, the flue temperature is heated to 950 ℃, the electromagnetic valve II on the liquid inlet pipe 7 is opened, the reducing agent is sprayed in a specified temperature section, the flue temperature is gradually increased along with the increase of the hearth temperature of the shuttle kiln 1, the output power of the combustor 3 is gradually reduced, when the combustor 3 stops working and the flue temperature continues to increase, the electromagnetic valve I on the cooling pipe is opened, cooling air is mixed into the flue, and the flue temperature is controlled to be about 950 ℃ all the time. The reducing agent is ensured to be always in a proper temperature window.

Embodiment 2, on the basis of embodiment 1, a smoke-conveying pipe 11 is connected between a smoke outlet of the combustion furnace 8 and the smoke exhaust fan 12, a plurality of annular cooling air pipes 10 are fixed on an inner wall of the smoke-conveying pipe 11, a hollow air-conveying cylinder 14 is arranged at a center of the cooling air pipe 10, a plurality of connecting pipes 15 are fixedly connected between the air-conveying cylinder 14 and the cooling air pipes 10, first air outlet holes 17 are formed in outer side walls of the connecting pipes 15 and the air-conveying cylinder 14, and second air outlet holes 16 are uniformly formed in an outer wall of the cooling air pipe 10 on one side facing a circle center.

An air delivery pipe 9 is fixed at the outer end of the cooling air pipe 10.

The hot flue gas discharged from the combustion furnace 8 enters the flue gas conveying pipe 11, at the moment, cooling air enters the cooling air pipe 10 from the air conveying pipe 9, one part of the cooling air is sprayed out from the air outlet two to cool the surrounding flue gas, the other part of the cooling air enters the air conveying cylinder 14 from the connecting pipe 15 and then is sprayed out from the air outlet one 17 to be uniformly cooled, and the temperature of the flue gas is better reduced.

To sum up, the utility model discloses set up at the exhaust port of shuttle kiln and fire burning furnace, set up the reduction chamber at the combustor rear portion that fires burning furnace, open through opening of control distribution port and stop the temperature control in the appropriate scope in reduction chamber to can spout the reductant in the reduction chamber and take off the round pin, it is better to take off the round pin effect, and the cost is lower.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention rather than requiring the present invention to be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Claims

1. The utility model provides a SNCR denitrification facility for high temperature shuttle kiln, includes shuttle kiln (1), and shuttle kiln (1) is equipped with the exhaust port, its characterized in that: the exhaust port is connected with and fires burning furnace (8), fire burning furnace (8) and be equipped with combustor (3), the front portion of combustor (3) is equipped with cooling air distribution port (2), the rear portion of combustor (3) is equipped with the reduction chamber, both ends top is equipped with transfer line (6) about the reduction chamber, the bottom of every transfer line (6) all is fixed with conveyer pipe (4) that set up along the fore-and-aft direction, the bottom of conveyer pipe (4) is fixed with a plurality of atomizer (5) along the fore-and-aft direction, combustor (3) left end is equipped with the outlet flue, the outlet flue is connected with smoke exhaust fan (12), smoke exhaust fan (12) are connected with chimney (13), reduction chamber and cooling air distribution port (2) department all are equipped with temperature sensor.

2. The SNCR denitration device for a high-temperature shuttle kiln according to claim 1, characterized in that: the cooling air distribution port (2) is connected with a cooling pipe, a first electromagnetic valve is arranged on the cooling pipe, the cooling pipe is connected with a cooling fan, the outer end of the infusion pipe (6) is connected with a liquid inlet pipe (7), the liquid inlet pipe (7) is connected with a delivery pump, a second electromagnetic valve is arranged on the liquid inlet pipe (7), the first electromagnetic valve and the second electromagnetic valve are connected with a controller, and the controller is connected with a temperature sensor and a combustor (3) at the reduction cavity and the cooling air distribution port (2).

3. The SNCR denitration device for a high-temperature shuttle kiln according to claim 1, characterized in that: the conveying pipes (4) on the left side and the right side are not on the same horizontal plane.

4. The SNCR denitration device for a high-temperature shuttle kiln according to claim 3, characterized in that: be connected with defeated tobacco pipe (11) between the outlet flue of burning furnace (8) and smoke exhaust fan (12), be fixed with a plurality of annular cooling air pipes (10) on the inner wall of defeated tobacco pipe (11), the center department of cooling air pipe (10) is equipped with hollow defeated wind cylinder (14), many connecting pipes (15) of fixedly connected with between defeated wind cylinder (14) and cooling air pipe (10), be equipped with exhaust vent (17) on the lateral wall of connecting pipe (15) and defeated wind cylinder (14), evenly be equipped with exhaust vent two (16) on the outer wall of cooling air pipe (10) towards centre of a circle one side.

5. The SNCR denitration device for a high-temperature shuttle kiln according to claim 1, characterized in that: an air delivery pipe (9) is fixed at the outer end of the cooling air pipe (10).