CN210206430U

CN210206430U - SNCR spray gun protection device

Info

Publication number: CN210206430U
Application number: CN201920819626.3U
Authority: CN
Inventors: Zhong Huang; 黄忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-03-31
Anticipated expiration: 2029-05-31

Abstract

The utility model relates to a denitration device technical field specifically discloses a SNCR spray gun protection device, including sheath and cooling circulation system, the sheath cover is established in spray gun house steward's outside, and spray gun house steward's shower nozzle is located the sheath, and the shower nozzle is 10 ~ 20mm apart from the distance of sheath right-hand member, be equipped with cooling chamber I and cooling chamber II along its axial in the sheath, cooling chamber I is close to the inner wall of sheath, and cooling chamber II is close to the outer wall of sheath, and cooling chamber I and cooling chamber II intercommunication are equipped with I import in the intercommunication cooling chamber on the sheath, still are equipped with the export of intercommunication cooling chamber II on the sheath, import and export communicate with cooling circulation system respectively. Adopt the technical scheme of this patent to solve spray gun house steward among the prior art problem of bending, scaling loss because of the high temperature is easy.

Description

SNCR spray gun protection device

Technical Field

The utility model relates to a denitration device technical field, in particular to SNCR spray gun protection device.

Background

Selective non-catalytic reduction (SNCR), means that a reducing agent is sprayed into a temperature window suitable for denitration reaction without the action of a catalyst to reduce nitrogen oxides in flue gas into harmless nitrogen and water. The technology generally adopts ammonia water, urea or hydroammonia acid as a reducing agent to reduce NO_xThe reducing agent only neutralizes NO in the flue gas_xReaction, which does not employ a catalyst, so this process is referred to as selective non-Catalytic reduction method (SNCR).

At present, in the process of purifying tail gas discharged by a rotary kiln of a cement plant, the tail gas needs to be purified sequentially through a decomposing furnace, a gooseneck, a five-stage cyclone cylinder and the like, the process is generally realized by spraying a reducing agent through a spray gun, the spray gun generally comprises a spray gun main pipe, a reducing agent inlet, a compressed gas inlet and a turbulator, the reducing agent and the compressed gas are mixed in the turbulator and are sprayed out in a fog form through the spray gun main pipe to react with flue gas, in addition, because the process does not use a catalyst, the reducing agent needs to be added in a high-temperature area, and the temperature window for spraying the reducing agent is generally an area of 800-1100 ℃, the inventor of the application develops a denitration process for improving the SNCR denitration efficiency of the cement plant, finds that only the spray gun is arranged at the five-stage cyclone cylinder, the denitration effect is optimal, and because the existing spray gun main pipe only has, the spray gun is easy to bend and burn after being used for a long time in the high-temperature environment, and the service life of the spray gun main pipe is greatly shortened.

SUMMERY OF THE UTILITY MODEL

The utility model provides a SNCR spray gun protection device to solve among the prior art spray gun house steward and use the problem that becomes curved and burning loss easily for a long time under high temperature environment, life shortens greatly.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the utility model provides a SNCR spray gun protection device, includes sheath and cooling circulation system, the sheath cover is established in spray gun house steward's outside, and spray gun house steward's shower nozzle is located the sheath, be equipped with cooling chamber I and cooling chamber II along its axial in the sheath, cooling chamber I is close to the inner wall of sheath, and cooling chamber II is close to the outer wall of sheath, and cooling chamber I and cooling chamber II intercommunication are equipped with the import of intercommunication cooling chamber I on the sheath, still are equipped with the export of intercommunication cooling chamber II on the sheath, import and export communicate with cooling circulation system respectively.

The technical principle and the effect of the technical scheme are as follows:

1. among this technical scheme, coolant gets into through the import under cooling circulation system's effect, flows to cooling chamber II along cooling chamber I in, and the export is discharged to the back, takes away the heat near spray gun house steward to make spray gun house steward can use for a long time under high temperature environment, and difficult emergence becomes curved and the scaling loss, prolong the life-span of its use.

2. Adopt cooling circulation system can carry out recycle to the coolant in cooling chamber I and cooling chamber II among this technical scheme, reduce the loss of resource, for example adopt water as coolant, then can realize the recovery of water resource and recycle.

Furthermore, the cross sections of the cooling cavity I and the cooling cavity II are both annular.

Has the advantages that: be the annular with cooling chamber I and the setting of cooling chamber II for spray gun house steward can be arranged in coolant's surrounding, improves coolant to spray gun house steward's cooling effect.

Further, the cyclone device also comprises a pre-buried pipe fixed on the five-stage cyclone cylinder, and the pre-buried pipe is detachably connected with the sheath.

Has the advantages that: the arrangement of the pre-buried pipe is convenient for an operator to install the sheath and the spray gun main pipe on the five-stage cyclone.

Furthermore, a flange positioned outside the five-stage cyclone is fixed on the embedded pipe, and a connecting disc connected with the flange through a bolt is arranged on the sheath.

Has the advantages that: the arrangement is convenient for the installation and the disassembly of operators.

Furthermore, a sealing ring I is arranged at the joint of the connecting disc and the flange.

Has the advantages that: the setting of sealing washer I can prevent that the flue gas in the five-stage cyclone from overflowing from the gap between sheath and the pre-buried pipe.

Furthermore, one end of the embedded pipe, which is far away from the flange, extends into the interior of the five-stage cyclone cylinder.

Has the advantages that: the installation of sheath and spray gun house steward of being convenient for on the one hand sets up like this, and when installing promptly, there is spacing effect to sheath and spray gun house steward, on the other hand common spray gun house steward will stretch into the inside of five-stage cyclone for spray gun house steward's length is longer, and pre-buried pipe stretches into the inside effect that still plays the support to sheath and spray gun house steward of five-stage cyclone.

Furthermore, the distance between the spray head of the spray gun main pipe and the right end of the sheath is 10-20 mm.

Has the advantages that: the arrangement can reduce the spray head of the spray gun main pipe which is impacted by particles in the flue gas, thereby reducing the abrasion and simultaneously avoiding the blockage of the spray head by the particles.

Further, a sealing ring II is arranged at a gap between the sheath and the spray gun main pipe.

Has the advantages that: the sealing ring II is arranged to prevent the smoke in the five-stage cyclone cylinder from overflowing from a gap between the spray gun main pipe and the protective sleeve.

Furthermore, the end part of the sheath positioned in the five-stage cyclone cylinder is in a flaring shape.

Has the advantages that: the setting of flaring form is convenient for the blowout of aqueous ammonia spraying more, prevents from the spray head spun aqueous ammonia spraying of spray gun house steward too much and the contact of sheath inner wall to condense on the sheath is inside.

Furthermore, a transition cavity close to one end of the flaring is arranged in the sheath, the transition cavity is annular, and the cooling cavity I and the cooling cavity II are respectively communicated with the transition cavity.

Has the advantages that: the transition chamber plays certain cushioning effect to the cold water that gets into the transition chamber from cooling chamber I, and the cold water speed that gets into the transition chamber promptly reduces, prolongs endothermic time, improves the heat absorption effect of cooling water.

Drawings

Fig. 1 is a sectional view of embodiment 1 of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a sectional view taken along line B-B of FIG. 1;

fig. 4 is a sectional view of embodiment 2 of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a spray gun main pipe 1, a five-stage cyclone 2, a sheath 10, a pre-buried pipe 11, a flange 12, a connecting disc 13, a bolt 14, a sealing ring I15, a sealing ring II 16, a cooling cavity I17, a cooling cavity II 18, an inlet 19, an outlet 20 and a transition cavity 21.

Example 1 is substantially as shown in figure 1:

the utility model provides a SNCR spray gun protection device, includes sheath 10 and cooling circulation system (not shown in the attached drawing), wherein the sheath 10 cover is established on spray gun house steward 1, and spray head of spray gun house steward 1 is located sheath 10, and the distance of spray head apart from sheath 10 right-hand member is 10 ~ 20mm, and the coolant that cooling circulation system adopted in this embodiment is water, including hot water pool, cold water pool and circulating pump, the temperature in the cold water pool keeps to the room temperature, and the intercommunication has the circulating pipe between cold water pool and the hot water pool, and wherein the water inlet and the cold water pool of circulating pump pass through the pipeline intercommunication.

Be fixed with pre-buried pipe 11 on five-stage cyclone 2, pre-buried pipe 11 runs through the section of thick bamboo wall of five-stage cyclone 2, and pre-buried pipe 11 right-hand member stretches into inside five-stage cyclone 2, and wherein pre-buried pipe 11 can be dismantled with sheath 10 and be connected, specifically is: as shown in fig. 2, a flange 12 located outside the five-stage cyclone 2 is fixed at the left end of the embedded pipe 11, a connecting disc 13 is integrally formed on the protective sleeve 10, wherein a plurality of connecting holes are formed in the connecting disc 13, the protective sleeve 10 is detachably connected with the embedded pipe 11 by installing bolts 14 into the connecting holes and the flange 12, a sealing ring i 15 is arranged at the joint of the connecting disc 13 and the flange 12, and a sealing ring ii 16 is arranged at the gap between the protective sleeve 10 and the spray gun main pipe 1.

As shown in a combined drawing 3, a cooling cavity I17 and a cooling cavity II 18 are arranged in the sheath 10 along the axial direction of the sheath, the cross sections of the cooling cavity I17 and the cooling cavity II 18 are annular, the right ends of the cooling cavity I17 and the cooling cavity II 18 are communicated, the cooling cavity I17 is close to the inner wall of the sheath 10, the cooling cavity II 18 is close to the outer wall of the sheath 10, an inlet 19 communicated with the cooling cavity I17 is arranged on the sheath 10, an outlet 20 communicated with the cooling cavity II 18 is further arranged on the sheath 10, the inlet 19 is connected with a water outlet of a circulating pump through a pipeline, and the outlet 20 is connected with a hot water pool through a pipeline.

In this embodiment, the sheath 10 is made of a high temperature resistant material, and in this embodiment, a silicon carbide ceramic material is selected.

The specific implementation process is as follows:

during the use, let in aqueous ammonia and compressed gas from spray gun house steward 1 left end, the aqueous ammonia is under compressed gas high pressure impact, spout into five-stage cyclone 2 from the right-hand member of spray gun house steward 1 in to carry out the reduction reaction to the flue gas, open the circulating pump among the cooling cycle system simultaneously, the circulating pump sends into the cold water in the cold water pond in cooling chamber I17 of sheath 10, and the back is discharged through cooling chamber II 18, thereby realizes the circulation cooling to spray gun house steward 1 and handles.

Example 2 is substantially as shown in figure 4:

example 2 differs from example 1 in that: the right end of the sheath 10 is in a flaring shape, a transition cavity 21 close to the end part of the right end is arranged in the sheath 10, the transition cavity 21 is in an annular shape, and the cooling cavity I17 and the cooling cavity II 18 are respectively communicated with the transition cavity 21; the setting of flaring form is convenient for the blowout of aqueous ammonia spraying more, can prevent simultaneously again that the particulate matter in the flue gas from striking the shower nozzle of spray gun house steward 1, and the setting of transition chamber 21 can make the cooling water that gets into from cooling chamber I17 stop to some extent in transition chamber 21 in addition, improves the heat absorption effect of cooling water.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. An SNCR spray gun protection device which characterized in that: including sheath and cooling circulation system, the sheath cover is established in the outside of spray gun house steward, and spray gun house steward's shower nozzle is located the sheath, be equipped with cooling chamber I and cooling chamber II along its axial in the sheath, the inner wall that cooling chamber I is close to the sheath, and cooling chamber II is close to the outer wall of sheath, and cooling chamber I and cooling chamber II intercommunication are equipped with the import of intercommunication cooling chamber I on the sheath, still are equipped with the export of intercommunication cooling chamber II on the sheath, import and export communicate with cooling circulation system respectively.

2. An SNCR lance protector according to claim 1 in which: the cross sections of the cooling cavity I and the cooling cavity II are both annular.

3. An SNCR lance protector according to claim 1 in which: the cyclone device also comprises a pre-buried pipe fixed on the five-stage cyclone cylinder, and the pre-buried pipe is detachably connected with the sheath.

4. An SNCR lance protector according to claim 3 in which: the embedded pipe is fixedly provided with a flange positioned outside the five-stage cyclone cylinder, and the sheath is provided with a connecting disc connected with the flange through a bolt.

5. An SNCR lance protection device in accordance with claim 4, wherein: and a sealing ring I is arranged at the joint of the connecting disc and the flange.

6. An SNCR lance protector according to claim 5 in which: one end of the embedded pipe, which is far away from the flange, extends into the interior of the five-stage cyclone cylinder.

7. An SNCR lance protector according to claim 6 in which: the distance between the spray head of the spray gun main pipe and the right end of the sheath is 10-20 mm.

8. An SNCR lance protector according to claim 7 in which: and a sealing ring II is arranged at the gap between the sheath and the spray gun main pipe.

9. An SNCR lance protector according to claim 1 in which: the end part of the sheath positioned in the five-stage cyclone cylinder is in a flaring shape.

10. An SNCR lance protector according to claim 9 in which: be equipped with the transition chamber that is close to flaring one end in the sheath, the transition chamber is cyclic annular, and cooling chamber I and cooling chamber II communicate with the transition chamber respectively.