CN216964157U

CN216964157U - Automatic ammonia spraying device of adjusting

Info

Publication number: CN216964157U
Application number: CN202220667089.7U
Authority: CN
Inventors: 杨智峰; 王明军; 郭建; 任庆昌; 胡宁
Original assignee: Datang Gongyi Power Generation Co ltd
Current assignee: Datang Gongyi Power Generation Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-07-15
Anticipated expiration: 2032-03-25

Abstract

The utility model discloses an automatically-adjusted ammonia spraying device, and mainly relates to the field of flue gas purification. The gas collecting device comprises a header pipe, a plurality of branch pipes are communicated on the header pipe along the length direction, the end parts of the branch pipes are communicated with a gas collecting shell, the top end of the gas collecting shell is communicated with a nozzle, a truncated cone-shaped gas guide valve is arranged in the gas collecting shell and above the port of the branch pipe, the edge of the bottom of the gas guide valve is contacted with the inner wall of the gas collecting shell, the gas guide valve can slide up and down in the gas collecting shell, a counterweight block is arranged at the nozzle, and the counterweight block is connected with the gas guide valve through a connecting rod. The utility model has the beneficial effects that: the driving force of ammonia gas is utilized, the narrow tube effect is combined, the ammonia gas flow velocity in each gas collecting shell is dynamically adjusted, the matching of the ammonia gas amount and the smoke gas distribution condition is realized, the ammonia gas flow can be automatically adjusted, and a series of problems caused by nozzle blockage caused by smoke dust sedimentation, ash collapse and the like can be effectively avoided.

Description

Automatic ammonia spraying device of adjusting

Technical Field

The utility model relates to the field of flue gas purification, in particular to an automatically-adjusted ammonia spraying device.

Background

The SCR (selective catalytic reduction) flue gas denitration technology is one of the most widely applied flue gas denitration technologies, and compared with other technologies, the SCR flue gas denitration technology has the advantages of high denitration efficiency, good selectivity, stable and reliable operation and the like. The principle is that under the action of catalyst, the reducer is selectively reacted with NOx in fume to produce N2 and H2O without toxic effect, and the reducer may be ammonia, ammonia water or urea, CO or H2 or small molecular alkane.

In the SCR flue gas denitration technology, the mixing effect of ammonia (NH3) and nitrogen oxide (NOx) is closely related to the denitration efficiency of a denitration device, and if the reducing agent and NOx are not sufficiently mixed, the NH3/NOx molar ratio in a local area is too low, and the denitration efficiency of the system is greatly reduced.

The existing denitration device has the problem that the ammonia is unevenly distributed due to the gradually increasing trend of the gas amount sprayed by each nozzle along the extending direction of the ammonia spraying header pipe, the denitration effect is influenced, the amount of ash carried in flue gas is large, the opening of the nozzle is upward, the flue is easily collapsed with ash or the ash is easily deposited with low load to block, the local ammonia flow is over sprayed, the ammonia escape concentration of a local area of a denitration outlet is increased, and the normal use of the denitration device is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an automatically-adjusted ammonia spraying device, which utilizes the driving force of ammonia gas and combines the narrow tube effect to dynamically adjust the flow velocity of the ammonia gas in each gas collecting shell, realizes the matching of the ammonia gas quantity and the distribution condition of flue gas, can automatically adjust the flow of the ammonia gas, and can effectively avoid a series of problems caused by nozzle blockage caused by soot sedimentation, soot collapse and the like.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

the utility model provides an automatic ammonia device that spouts of adjusting, includes the house steward, there are a plurality of branch pipes along length direction intercommunication on the house steward, branch pipe tip intercommunication has the gas collection shell, gas collection shell top intercommunication has the nozzle, just be located branch pipe port top in the gas collection shell and be equipped with the air guide valve of round platform shape, air guide valve bottom edge and the contact of gas collection shell inner wall, just the air guide valve can slide from top to bottom in the gas collection shell, nozzle department is equipped with the counter weight sprue, the counter weight sprue passes through the connecting rod and is connected with the air guide valve.

Furthermore, a plurality of sliding grooves are formed in the inner wall of the gas collection shell, a plurality of sliding blocks which are in sliding connection with the corresponding sliding grooves are arranged at the bottom of the gas guide valve, and springs are arranged in the sliding grooves and at the bottoms of the sliding blocks.

Furthermore, what air guide valve top opening part circumference array articulated have a plurality of regulating plates, and is a plurality of the position that regulating plate bottom and keep away from articulated department all is equipped with the elasticity scute, the elasticity scute becomes the articulated department of an angle and most advanced orientation regulating plate, and is a plurality of the regulating plate gathers together into the round platform form to the middle part under the elasticity support of elasticity scute, and is a plurality of the regulating plate can be blown by the air current and outwards rotates and extrudees the elasticity scute.

Further, the counterweight plugging block is in an inverted cone shape.

Furthermore, the gravity of the counterweight block is greater than the elastic force of the spring, and the elastic force of the spring and the thrust of the branch pipe for air injection are greater than the gravity of the counterweight block.

Compared with the prior art, the utility model has the beneficial effects that:

according to the gas collecting device, ammonia gas sprayed out of a branch pipe orifice is gathered through the gas guide valve and then sprayed out from an opening with a small diameter at the top, and then sprayed out through the nozzle, and meanwhile the gas guide valve can be blown to slide up and down in the gas collecting shell by utilizing the self driving force of the ammonia gas, so that when the gas pressure sprayed out of a remote branch pipe is large, the gas guide valve can be blown to a high height, the area between the gas guide valve and the branch pipe is increased, the flow rate of the gas flowing out of the top of the gas guide valve is weakened, the flow rate of the ammonia gas sprayed out of the gas guide valve is small, and the flow rate of the corresponding ammonia gas sprayed out of the nozzle is small; when the air pressure sprayed by the nearby branch pipe is small, the air guide valve can be lowered to a position close to the branch pipe, the area of an air flow channel is reduced, certain pressure can be provided for the air flow at the branch pipe by combining the gravity of the counterweight block, the narrow pipe effect is combined, the flow rate of the ammonia sprayed out of the small-diameter opening at the top of the air guide valve can be further improved, the flow of the ammonia sprayed out of the nozzle is improved, the flow of the ammonia sprayed out of the nozzle at each position is more uniform, the flow rate and the channel area of the ammonia in each gas collecting shell can be dynamically adjusted, the matching of the ammonia amount and the smoke distribution condition is realized, the flow of the ammonia can be automatically adjusted, the counterweight block is connected onto the air guide valve through a connecting rod, after the ammonia channel is closed, the air guide valve loses the support of the air flow, the counterweight block can fall to the nozzle under the action of gravity to block the nozzle, and serious non-uniform ammonia spraying caused by the collapse of smoke dust and the like can be effectively avoided, The denitration efficiency is reduced, the ammonia escape exceeds the standard, the service life of the catalyst is asymmetrically consumed, and the like.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a structural sectional view of the present invention.

FIG. 3 is a schematic view of the structure of the air guide valve of the present invention.

Fig. 4 is a sectional view of the air guide valve structure of the present invention.

Fig. 5 is an enlarged view of the portion a of fig. 2 of the present invention.

Fig. 6 is an enlarged view of the portion B of fig. 4 of the present invention.

Reference numerals shown in the drawings:

1. a header pipe; 2. a branch pipe; 3. a gas collection shell; 4. a nozzle; 5. a gas guide valve; 6. a counterweight block; 7. a connecting rod; 8. a chute; 9. a slider; 10. a spring; 11. an adjusting plate; 12. an elastic angle plate.

Detailed Description

The utility model will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.

The utility model relates to an automatically-adjusted ammonia spraying device, which comprises a main structure comprising a main pipe 1, wherein the main pipe 1 is communicated with a plurality of branch pipes 2 along the length direction, the end parts of the branch pipes 2 are communicated with a gas collecting shell 3, the top end of the gas collecting shell 3 is communicated with a nozzle 4, the gas outlet of the nozzle 4 is exposed in smoke, a circular truncated cone-shaped gas guide valve 5 is arranged in the gas collecting shell 3 and positioned above the port of the branch pipe 2, the bottom edge of the gas guide valve 5 is contacted with the inner wall of the gas collecting shell 3, so that ammonia sprayed out of the branch pipes 2 is completely collected and guided by the gas guide valve 5 and then sprayed out from a top opening, the ammonia is prevented from escaping from the edge of the gas guide valve 5, the effect of automatically adjusting the flow is ensured, the diameter of the top opening of the gas guide valve 5 is smaller than the inner diameter of the gas collecting shell 3, and the smaller opening diameter of the top of the gas guide valve 5 can play a role of a narrow pipe effect when necessary, the flow rate of the ammonia when the ammonia passes through can be increased, and the flow of the ammonia sprayed out from the nozzle 4 is increased, the gas guide valve 5 can slide up and down in the gas collection shell 3, the area of a gas channel between the gas guide valve 5 and the branch pipe 2 is changed, so that the pressure of gas in the bottom area of the gas guide valve 5 is changed, the flow rate of ammonia sprayed out from the top opening of the gas guide valve 5 is changed, and the flow regulation is realized; when the air pressure sprayed by the branch pipe 2 at a near position is small, the air guide valve 5 can descend to a position close to the branch pipe 2, and the air flow with insufficient air pressure can not easily blow up the air guide valve 5 under the action of the counterweight block 6, at the moment, the area of an air flow channel is reduced, larger pressure can be provided for the air flow at the branch pipe, and the flow velocity of the ammonia sprayed out through a small-diameter opening at the top of the air guide valve 5 can be further improved by combining the narrow tube effect, so that the flow of the ammonia sprayed out by the nozzles 4 is improved, the flow of the ammonia sprayed out by the nozzles 4 at each position is more uniform, the flow velocity and the channel area of the ammonia in each gas collection shell 3 can be dynamically adjusted, the matching of the distribution condition of the ammonia and the smoke is realized, and the flow of the ammonia can be automatically adjusted,

the utility model discloses a catalyst denitration device, including nozzle 4, counter weight sprue 6, gas guide valve 5, branch pipe 2, gas guide valve 5, nozzle 4, connecting rod 7, gas guide valve 5, gas guide valve 4, the gravity of counter weight sprue 6 is pressed down and is shutoff nozzle 4, can effectively avoid the serious inequality of ammonia spraying that causes of nozzle 4 blocking that the smoke and dust subsides and collapse ash etc. to cause, denitration efficiency descends, ammonia escape exceeds standard, a series of problems such as asymmetric consumption of catalyst life.

Preferably, it has a plurality of spouts 8 to open on the 3 inner walls of collection gas shell, 5 bottoms of air guide valve are equipped with a plurality of and correspond 8 sliding connection's of spout sliders 9, it is equipped with spring 10 just to be located 9 bottoms of slider in the spout 8, can assist the balance relation between adjusting counter weight sprue 6 and the 2 blowout air currents of branch pipe through spring 10, do not need the matching relation value between 6 weight of accurate test counter weight sprue and the 2 air currents of branch pipe, reduce the degree of difficulty of product production debugging, make the principle function of this patent change the realization, reduction in production cost is favorable to using widely.

Preferably, a plurality of adjusting plates 11 are hinged to the opening of the top of the gas guide valve 5 in a circumferential array, elastic angle plates 12 are arranged at the bottoms of the adjusting plates 11 and at positions far away from the hinged positions, the elastic angle plates 12 form an angle, the pointed ends of the elastic angle plates face the hinged positions of the adjusting plates 11, the adjusting plates 11 are gathered to the middle under the support of the elastic force of the elastic angle plates 12 to form a circular truncated cone shape, the side edges of the adjusting plates 11 are in close contact with each other after gathering, the circular truncated cone shape can be maintained, the diameter of the top of the circular truncated cone formed by gathering the adjusting plates 11 is smaller than that of the opening of the top of the gas guide valve 5, the maximum gas passage area between the gas guide valve 5 and the branch pipe 2 can be further enlarged, the flow rate of gas sprayed through the gas guide valve 5 can be more accurately limited, the adjusting plates 11 can be blown by airflow to rotate outwards and extrude the elastic angle plates 12, so that the openings of the tops of the adjusting plates 11 can be opened to a larger diameter, when the air guide valve 5 is too close to the branch pipe 2 to enable air to flow through, the adjusting plate 11 can be blown to be opened by the air flow so as to spray more ammonia gas, and the flow of the ammonia gas is ensured.

Preferably, the counterweight block 6 is in an inverted cone shape, so that the side wall of the counterweight block 6 can be attached to the inner edge of the nozzle 4 more tightly, and good sealing performance after the nozzle 4 is blocked by the counterweight block 6 is ensured.

Preferably, the gravity of the counterweight block 6 is greater than the elastic force of the spring 10, the elastic force of the spring 10 and the thrust of the branch pipe 2 for jetting air are greater than the gravity of the counterweight block 6, so that the area of an air channel in the area between the air guide valve 5 and the air outlet of the branch pipe 2 can be automatically adjusted, and the automatic adjustment of the ammonia jetting flow is realized.

This patent makes the flow of the 4 blowout ammonia of nozzle of each position more even, and the ammonia velocity of flow and the passage area in each gas collection shell 3 of dynamic adjustment have been realized ammonia volume and flue gas distribution situation's matching, can the automatically regulated ammonia flow, and can effectively avoid the smoke and dust subside and collapse nozzle 4 that ash etc. caused and the ammonia that spouts that causes is serious inhomogeneous, denitration efficiency descends, ammonia escape exceeds standard, a series of problems such as the asymmetric consumption of catalyst life.

Claims

1. The utility model provides an automatic ammonia injection device of adjusting which characterized in that: including house steward (1), there are a plurality of branch pipes (2) along length direction intercommunication on house steward (1), branch pipe (2) tip intercommunication has air collection shell (3), air collection shell (3) top intercommunication has nozzle (4), air collection shell (3) are interior and lie in branch pipe (2) port top and be equipped with air guide valve (5) of round platform shape, air guide valve (5) bottom edge and air collection shell (3) inner wall contact, just air guide valve (5) can slide from top to bottom in air collection shell (3), nozzle (4) department is equipped with counter weight sprue (6), counter weight sprue (6) are connected with air guide valve (5) through connecting rod (7).

2. The self-regulating ammonia sparger device of claim 1, wherein: open on air collecting shell (3) inner wall and have a plurality of spouts (8), air guide valve (5) bottom be equipped with a plurality ofly with correspond spout (8) sliding connection's slider (9), just be located slider (9) bottom in spout (8) and be equipped with spring (10).

3. The self-regulating ammonia sparger device of claim 1, wherein: what air guide valve (5) top opening part circumference array articulated have a plurality of regulating plates (11), and is a plurality of regulating plate (11) bottom and keep away from the position of articulated department all is equipped with elasticity scute (12), elasticity scute (12) become an angle and most advanced towards the articulated department of regulating plate (11), and are a plurality of regulating plate (11) are gathered together into the round platform form to the middle part under the elastic support of elasticity scute (12), and are a plurality of regulating plate (11) can be blown by the air current and outwards rotate and extrude elasticity scute (12).

4. The self-regulating ammonia sparger device of claim 1, wherein: the counterweight plugging block (6) is in an inverted cone shape.

5. The self-regulating ammonia sparger device of claim 2, wherein: the gravity of counter weight sprue (6) is greater than the elasticity of spring (10), the elasticity of spring (10) is greater than the gravity of counter weight sprue (6) with the jet-propelled thrust of branch pipe (2).