CN213610656U

CN213610656U - Ammonia spraying device in rotary kiln

Info

Publication number: CN213610656U
Application number: CN202021418806.XU
Authority: CN
Inventors: 宋定坤; 王建伟
Original assignee: Zhengzhou Xinmi Melting Material Co ltd
Current assignee: Zhengzhou Xinmi Melting Material Co ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-07-06
Anticipated expiration: 2030-07-17

Abstract

The utility model discloses an spout ammonia device in rotary kiln, including spouting the ammonia device, spout the ammonia device and still include the ammonia shower nozzle, spout the ammonia pipe, nozzle cover and fixed connection are at the sliding part on the smoke chamber, ammonia shower nozzle fixed connection is in the one end of spouting the ammonia pipe, spout and fixedly on the ammonia pipe be provided with the pulley, the ammonia shower nozzle still includes nozzle and nozzle base, the nozzle is all installed on nozzle base, utilizes the waste heat in the kiln to preheat the flue gas for finally arrive the exhaust gas temperature of rotary kiln feed inlet department at the flue gas and just heat up the catalyst to best reaction temperature, practiced thrift the cost, reduced the loss of the energy, improved the speed of denitration.

Description

Ammonia spraying device in rotary kiln

Technical Field

The utility model relates to a waste gas treatment denitration field in the rotary kiln, concretely relates to spout ammonia device in rotary kiln.

Background

In recent years, environmental pollution problems such as haze, acid rain, photochemical smog and the like caused by various atmospheric pollutants discharged by industrial production in China are endless, the harm is extremely large, with the enhancement of national environmental awareness, the emission limit value of the state on various industrial boilers and industrial kilns is increasingly strict, the emission standard of the state and the government on the atmospheric pollutants is continuously revised, the control requirement is continuously improved, the emission requirement of nitrogen oxides of a coal-fired unit is further improved from 100mg/Nm3 to 50mg/Nm3, namely the generally-called ultra-clean emission requirement, from the thermal power plant pollutant emission standard GB13223-2011 in 2011 to the later coal-electricity energy-saving emission-reduction upgrading and transformation action plan (2014-2020). Therefore, the effective control of the emission of various atmospheric pollutants becomes an important means for controlling the environmental pollution in China at present.

The technology is characterized in that diluted reducing agent (NH3) is sprayed into a tail flue of a boiler, and the reducing agent (NH3) reacts with NO and NO2 in flue gas to generate harmless nitrogen (N2) and water (H2O) under the action of a catalyst within an effective temperature range of 320-400 ℃, so that the effect of removing NOx is achieved. Although the method can remove the nitrogen oxides in the industrial waste gas, the traditional SCR denitration device can not completely meet the higher and higher emission requirements, the traditional process can not effectively solve the problem of ammonia escape, the traditional method needs to heat the SCR denitration device, so that the catalyst reaches the ideal catalytic temperature, meanwhile, the traditional method cannot ensure complete reaction by utilizing ammonia and the industrial waste gas, the residual reducing agent after the reaction is inconvenient to recover, the cost is increased, and economic loss is caused.

In view of this, a rotary kiln spouts ammonia device in kiln, the heat of utilization kiln self flue gas that can be fine heats up to the best reaction temperature with the reaction catalyst, and this technology adopts the aqueous ammonia as the reductant, can guarantee that industrial waste gas denitration is complete, the aqueous ammonia after the reaction is convenient for retrieve and recycle simultaneously, the cost is reduced has improved industrial waste gas purification degree for the nitride content that the gas after the purification contains still less, has reduced the harm to atmospheric.

Disclosure of Invention

The industrial waste gas reaction that is incomplete and can not reach the temperature problem of ideal to the catalyst to above-mentioned prior art, the utility model aims at providing a be used for directly carrying out denitrification facility in the rotary kiln.

The purpose of the utility model is realized like this:

the utility model provides an spout its characterized in that and include in rotary kiln, smoke chamber and the hydraulic pressure thrust unit of setting on the smoke chamber, hydraulic pressure thrust unit with spout the ammonia union coupling, it is provided with the pulley to spout ammonia pipe middle part, the smoke chamber upper end sets up the removal opening that communicates the smoke chamber, remove the opening and cooperate with the pulley that sets up on spouting the ammonia pipe, it is connected with the ammonia return bend to spout ammonia pipe lower extreme, it is connected with the ammonia shower nozzle to spout ammonia return bend lower extreme, the ammonia shower nozzle divide into built-in nozzle and external nozzle.

The sliding part (3) comprises a pulley and a sliding rail, the pulley is arranged on the ammonia spraying pipe, and the sliding rail is arranged on the inner side of the moving opening.

The external nozzle end is higher than the internal nozzle end, and the central nozzle is as high as the external nozzle.

The internal nozzle and the external nozzle are both provided with nozzle covers.

The built-in nozzle is provided with a built-in nozzle cover, the external nozzle is provided with an external nozzle cover, and the external nozzle cover and the built-in nozzle cover are fixed on the nozzle base through bolts.

The hydraulic pushing device is arranged with a phase line of the movable opening above the smoke chamber.

And a movable sealing separation blade is arranged between the pulley and the slide rail at the moving opening and is fixedly connected to the ammonia spraying pipe, and the size of the movable sealing separation blade is the same as that of the moving opening.

The utility model has the advantages that:

1. the waste gas generated by the combustion of the ammonia gas in the rotary furnace is directly denitrated in the flue gas in the rotary furnace and then discharged into the air, so that the cost is reduced, and the purification degree of the industrial waste gas is improved.

2. The flue gas is preheated by using the waste heat in the kiln, so that the temperature of the waste gas finally reaching the feed inlet of the rotary kiln just raises the catalyst to the optimal reaction temperature, the cost is saved, the energy loss is reduced, and the denitration speed is increased.

3. The ammonia spraying pipe can carry out the removal of horizontal direction under hydraulic pressure thrust unit's effect, when carrying out the rotary kiln denitration, thereby can remove the ammonia spraying pipe and change the spraying position of ammonia shower nozzle in the rotary kiln, when the burning is insufficient in the rotary kiln, the ammonia spraying pipe removes and carries out the intensive mixing to the exhaust position of rotary kiln upper end flue gas, it makes and removes intermediate position to remove the ammonia spraying pipe when the intensive burning flue gas is great in the rotary kiln, make the abundant burning, so can adjust according to how much of the burning back flue gas in the rotary kiln, make the denitration in the rotary kiln of carrying out according to the circumstances more efficient of difference.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a view showing a structure of a sliding part of the present invention;

FIG. 4 is a schematic structural view of a nozzle cover of the ammonia gas nozzle;

FIG. 5 is a schematic structural view of a built-in nozzle of the ammonia gas nozzle;

FIG. 6 is a top view of the showerhead;

fig. 7 is a schematic structural view of embodiment 2 of the present invention;

in the figure: the rotary kiln comprises a rotary kiln body 1, an ammonia gas spray head 2, a sliding part 3, an ammonia spraying pipe 4, a smoke chamber 5, a hydraulic pushing device 6, a moving opening 7, a movable sealing blocking piece 8, an extension pipe 9, a hydraulic base 10, an ammonia spraying bent pipe 11, a nozzle 2-1, a hollow thin pipe 2-2, a nozzle base 2-3, an external nozzle 2-4, an internal nozzle 2-5, an external nozzle cover 2-6, a central nozzle 2-7, an internal nozzle cover 2-8, an ammonia spraying pipeline 2-9, a pulley 3-1 and a slide rail 3-2.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example 1:

as shown in fig. 1 to 6, the ammonia injection device in the rotary kiln comprises an ammonia injection device, an ammonia gas nozzle 2, an ammonia injection pipe 4, a nozzle cover and a sliding part 3 fixedly connected to a smoke chamber 5, the ammonia gas nozzle 2 is fixedly connected with one end of an ammonia spraying pipe 4 extending into the rotary kiln, ammonia water is positioned at a feed inlet of the rotary kiln by 1.5-3 m, a pulley 3-1 is fixedly arranged on the section of the ammonia spraying pipe 4 vertical to the horizontal plane of the ammonia spraying pipe 4, said pulley 3-1 is used in combination with a sliding part 3 fixed to the opening of the smokebox 5, the pulley 3-1 not only fixes the ammonia spraying pipe 4 but also controls the horizontal movement of the pipe body, the ammonia sprayer 2 further comprises a nozzle and a nozzle base 2-3, and the nozzle is fixed on the nozzle base 2-3 through bolts and is convenient to mount and dismount.

Sliding part 3 includes pulley 3-1 and slip track 3-2, pulley 3-1 fixed connection is on 4 vertical pipelines of ammonia spraying pipe, slip track 3-2 fixed connection is in the top of smoke chamber 5, pulley 3-1 sets up in the pipeline both sides, and each side sets up two, both sides pulley 3-1 is inlayed on slip track 3-2, can be in the free activity of horizontal direction, smoke chamber 5 top is provided with the removal opening 7 that can supply ammonia spraying pipe 4, the size that removes opening 7 is the same with the size that 4 horizontal directions of ammonia spraying pipe removed, provides the space for the removal of ammonia spraying pipe 4.

The nozzles comprise a central nozzle 2-7, an internal nozzle 2-5 and an external nozzle 2-4, the external nozzle 2-4 is higher than the internal nozzle 2-5, the spraying atomization degree of the external nozzle 2-4 is larger than that of the internal nozzle 2-5, and the nozzles are prevented from being blocked by combustion materials in the rotary kiln body 1.

The central nozzle 2-7, the internal nozzle 2-5 and the external nozzle 2-4 are sequentially arranged on the nozzle base 2-3 from inside to outside, the central nozzle 2-7, the internal nozzle 2-5 and the external nozzle 2-4 are communicated with the nozzle base 2-3 and communicated with the ammonia spraying pipe 4, the nozzle base 2-3 is used as a medium layer to communicate the nozzle with the ammonia spraying pipe 4, the internal pressure is increased to enlarge the spraying range, and the internal nozzle 2-5 and the external nozzle 2-4 are both provided with nozzle covers.

The nozzle cover comprises an internal nozzle cover 2-8 and an external nozzle cover 2-6, the internal nozzle cover 2-8 is arranged on the internal nozzle 2-5, the external nozzle cover 2-6 is arranged on the external nozzle 2-4, the external nozzle cover 2-6 is arranged on the outer side of the internal nozzle cover 2-8, the internal and external nozzle cover 2-6 and the internal nozzle cover 2-8 are connected with the nozzle base 2-3 through bolts, and the nozzle cover is arranged to protect the nozzles from being corroded and prolong the service life of the nozzles in the rotary kiln body 1.

The hydraulic pushing device 6 is further arranged on one side of the moving opening 7 of the smoke chamber 5, the hydraulic pushing device 6 and the moving opening 7 of the smoke chamber 5 are arranged on the same line, the hydraulic pushing device 6 can be simultaneously controlled when the rotary kiln starts to operate, the movement of the ammonia sprayer 2 at the bent pipe end of the ammonia spraying pipe 4 is controlled, the position change in the rotary kiln is adjusted, and the denitration maximization in the kiln is changed.

The flexible front end of hydraulic pressure thrust unit 6 and the fixed setting of ammonia spraying pipe 4, it is provided with activity closure separation blade fixed connection on ammonia spraying pipe 4 to remove opening 7, prevents that the flue gas that carries out the reaction in the kiln from spilling out above and corroding hydraulic pressure thrust unit 6.

Example 2:

as shown in fig. 7, the ammonia spraying device in the rotary kiln comprises an ammonia spraying device, the ammonia spraying device further comprises an ammonia spraying head 2, an ammonia spraying pipe 4, a nozzle cover and a sliding part 3 fixedly connected to a smoke chamber 5, the ammonia spraying head 2 is fixedly connected to one end, extending into the rotary kiln, of the ammonia spraying pipe 4, ammonia water is located at a feed inlet 1.5-3 m of the rotary kiln, a pulley 3-1 is fixedly arranged on the ammonia spraying pipe 4, perpendicular to the horizontal plane, of the ammonia spraying pipe 4, the pulley 3-1 is used in combination with the sliding part 3 fixed to an opening in the smoke chamber 5, the pulley 3-1 not only fixes the ammonia spraying pipe 4 but also controls the movement of the pipe body in the horizontal direction, the ammonia spraying head 2 further comprises a nozzle and a nozzle base 2-3, and the nozzle is fixed to the nozzle base 2-3 through bolts, so that the installation and the disassembly are.

The ammonia spraying device is characterized in that a hollow thin tube 2-2 is arranged in the ammonia spraying tube 4, the diameter of the hollow thin tube 2-2 is the same as that of the built-in nozzle 2-5, a hollow pipeline between the hollow thin tube 2-2 and the ammonia spraying tube 4 is communicated with the external nozzle 2-4, the hollow thin tube 2-2 controls spraying of the built-in nozzle 2-5, and the ammonia spraying device can be used as an ammonia water spraying head during working and can be used as a cleaning nozzle for cleaning the rotary kiln after working.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims

1. The utility model provides an spout ammonia device in rotary kiln, its characterized in that includes, smoke-box (5) and setting are in hydraulic pressure thrust unit (6) on smoke-box (5), hydraulic pressure thrust unit (6) are connected with ammonia spraying pipe (4), ammonia spraying pipe (4) middle part is provided with sliding part (3), smoke-box (5) upper end sets up the intercommunication the removal opening (7) of smoke-box (5), remove opening (7) and slide part (3) of setting on ammonia spraying pipe (4) and cooperate, ammonia spraying pipe (4) lower extreme is connected with ammonia spraying return bend (11), ammonia spraying return bend (11) lower extreme is connected with ammonia shower nozzle (2), ammonia shower nozzle (2) divide into built-in nozzle (2-5) and external nozzle (2-4).

2. The ammonia injection device in the rotary kiln according to claim 1, characterized in that: the sliding component (3) comprises a pulley (3-1) and a sliding rail (3-2), the pulley (3-1) is arranged on the ammonia spraying pipe (4), and the sliding rail (3-2) is arranged on the inner side of the moving opening (7).

3. The ammonia injection device in the rotary kiln according to claim 1, characterized in that: the end of the external nozzle (2-4) is higher than the end of the internal nozzle (2-5), and the central nozzle (2-7) is as high as the external nozzle (2-4).

4. The ammonia injection device in the rotary kiln according to claim 1, characterized in that: the internal nozzles (2-5) and the external nozzles (2-4) are provided with nozzle covers.

5. The ammonia injection device in the rotary kiln according to claim 4, characterized in that: the built-in nozzle cover (2-8) is arranged on the built-in nozzle (2-5), the external nozzle cover (2-6) is arranged on the external nozzle (2-4), and the external nozzle cover (2-6) and the built-in nozzle cover (2-8) are fixed on the nozzle base (2-3) through bolts.

6. The ammonia injection device in the rotary kiln according to claim 1, characterized in that: the hydraulic pushing device (6) and the moving opening (7) above the smoke chamber (5) are arranged on the same line.

7. The ammonia injection device in the rotary kiln according to claim 2, characterized in that: a movable sealing separation blade (8) is arranged between the pulley (3-1) and the slide rail track (3-2), the movable sealing separation blade (8) is fixedly connected to the ammonia spraying pipe (4), and the size of the movable sealing separation blade (8) is the same as that of the movable opening (7).