CN106345297B - Novel denitration nozzle base, multi-nozzle denitration spray gun rod and denitration spray gun - Google Patents
Novel denitration nozzle base, multi-nozzle denitration spray gun rod and denitration spray gun Download PDFInfo
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- CN106345297B CN106345297B CN201610875418.6A CN201610875418A CN106345297B CN 106345297 B CN106345297 B CN 106345297B CN 201610875418 A CN201610875418 A CN 201610875418A CN 106345297 B CN106345297 B CN 106345297B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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Abstract
The invention relates to the technical field of waste gas treatment equipment, in particular to a novel denitration nozzle base, a multi-nozzle denitration spray gun rod and a denitration spray gun, wherein a reducing agent liquid enters from a reducing agent inlet, flows along the inner wall of a liquid pipe and is sprayed out from a through hole on the liquid pipe, compressed air enters a first sleeve pipe from a compressed air inlet and is sprayed out from an air inlet arranged at the bottom end of the nozzle base, and fine fog drops atomized into 40-80 mu m are mixed in a cavity of the nozzle base and then enter the nozzle to be sprayed out; in the invention, because the inner diameters of the through holes and the air inlets on the liquid pipe are very small, under the condition that 3-5 nozzle bases are arranged, liquid is sprayed out from the through holes on the liquid pipe, gas is sprayed out from the air inlets arranged at the bottom end of the nozzle bases and then is mixed in the cavity of the nozzle bases, the pressure in the whole gun body is basically kept stable, so that the flow of each nozzle of the spray gun is consistent, the fluid atomization is very uniform, and the denitration efficiency is obviously improved.
Description
Technical Field
The invention relates to the technical field of waste gas treatment equipment, in particular to a novel denitration nozzle base, a multi-nozzle denitration spray gun rod and a denitration spray gun.
Background
At present, when industries such as thermal power plants, waste incineration plants and the like carry out production, circulating fluidized bed boilers, coal-fired boilers and gas-fired boilers are needed to be used, and the flue gas discharged by the boilers needs to be subjected to denitration treatment. When the power generation coal-fired boiler, particularly the pulverized coal boiler, with the power generation less than 600MW is used, NO is generated in the tail gas of the boiler X The discharge amount of the waste water reaches 400-600 mg/nm 3 Even higher, so that SNCR (Selective non-Catalytic Reduction) cannot meet the denitration requirement, and thus only SCR (Selective Catalytic Reduction) process or SNCR + SCR combined process can be used.
The SNCR + SCR combined process adopts SNCR at the front part and SCR at the back part. The main arrangement mode is that a spray gun is arranged at a bending angle part in front of a coal economizer at the rear part of a boiler flue, and urea solution or ammonia water solution is sprayed. In the process, a urea pyrolysis furnace or a liquid ammonia evaporator is not needed, and urea pyrolysis or ammonia water evaporation is directly carried out by utilizing the temperature of flue gas. The urea solution was used in such a manner that the temperature was set to 950. + -.50 ℃ as much as possible, and the ammonia solution was used in such a manner that the temperature was set to 900. + -.50 ℃ as much as possible. Generally, a reaction time of 0.5 seconds or more must be ensured, and the degree of mixing must be good. Meanwhile, fog drops are required to be well atomized, the fog is uniform, the flow of each spray head is consistent, and the cross section of a flue is covered by a fog area to the maximum extent, so that the denitration efficiency is highest, and the ammonia escape is lowest.
However, the spray guns adopted in the SCR process are lengthened spray guns with a plurality of spray heads, that is, the spray heads are arranged on a gun rod, the gun rod of the spray gun is lengthened horizontally, and a plurality of spray heads are simultaneously spaced at a certain distance along the horizontal direction; the reducing agent is atomized at the tail end of the gas-liquid mixing body and then is conveyed to the nozzles of all the spray heads through the inner cavity of the gun rod. However, due to the lengthening of the gun rod of the spray gun and the increase of the spray heads, certain pressure loss occurs when fluid passes through each nozzle in the gun rod, the pressure in the gun body can be gradually reduced along with the delivery of the fluid in the inner cavity of the gun body, the flow rate is reduced, the atomization effect can be influenced by the loss of air pressure, and the spraying of the spray gun is not uniform. The farther away the gas-liquid mixture body will appear like this the flow is the less, and atomization effect is also worse for whole fog zone is inhomogeneous, thereby influences the denitration effect, reduces denitration efficiency.
Disclosure of Invention
In order to solve the problems of poor denitration effect and low denitration efficiency in the prior art, the invention provides a novel denitration nozzle base, a multi-nozzle denitration spray gun rod and a denitration spray gun.
According to a first aspect of the embodiments of the present invention, there is provided a novel denitration nozzle base, comprising a nozzle base, a nozzle, a liquid pipe, and an air inlet, wherein,
a cavity with an opening at one end is arranged in the nozzle base;
the nozzle is arranged at the opening of the cavity in a sealing manner and communicated with the space in the cavity;
the liquid pipe penetrates through the cavity of the nozzle base, and the liquid pipe is connected with the nozzle base in a sealing mode;
the liquid pipe is provided with a through hole on the outer wall of the cavity of the nozzle base, and the through hole is communicated with the cavity of the nozzle base;
the bottom of the nozzle base is provided with an air inlet which is communicated with the inner space of a liquid pipe penetrating through the cavity of the nozzle base.
Optionally, the through hole and the axis of the air inlet are arranged on the same straight line.
According to a second aspect of the embodiments of the present invention, there is provided a multi-nozzle denitration lance rod, comprising a plurality of nozzle bases, a gas-liquid distribution body, a liquid pipe, and a first sleeve, wherein,
the nozzle bases are sequentially connected in a sealing manner along the horizontal direction, and the internal spaces of the nozzle bases are communicated with each other;
the gas-liquid distribution body comprises a reducing agent inlet and a compressed air inlet;
the first sleeve is arranged outside the liquid pipe;
the reducing agent inlet is hermetically connected with the left end of the liquid pipe through a liquid flow pipe arranged in the gas-liquid distribution body in the horizontal direction, and the inner spaces of the liquid pipe and the reducing agent inlet are communicated with each other;
the compressed air inlet is connected with the left end of the first sleeve in a sealing mode through a gas flow pipe arranged in the horizontal direction of the gas-liquid distribution body, and the inner spaces of the compressed air inlet are communicated with each other.
Optionally, the liquid flow tube is disposed above the gas flow tube.
Optionally, the number of nozzle bases is 3, 4 or 5.
According to a second aspect of the embodiment of the invention, a denitration spray gun is further provided, the denitration spray gun comprises a gas-liquid distribution body, a liquid pipe and a first sleeve, wherein the gas-liquid distribution body, the liquid pipe and the liquid pipe are sequentially arranged, the liquid pipe is in sealing connection with a liquid flow pipe arranged in the horizontal direction of the gas-liquid distribution body, the first sleeve is arranged outside the liquid pipe, a nozzle base is arranged on the liquid pipe, and a nozzle is arranged on the nozzle base; wherein the content of the first and second substances,
the gas flow pipe arranged in the horizontal direction of the gas-liquid distribution body is hermetically connected with the left end of the first sleeve, and the inner spaces of the gas flow pipe and the first sleeve are communicated with each other;
a cavity with an opening at one end is arranged in the nozzle base;
the nozzle is arranged at the opening of the cavity in a sealing way, and the interior of the nozzle is communicated with the space in the cavity;
the liquid pipe penetrates through the cavity of the nozzle base, and the liquid pipe is connected with the nozzle base in a sealing mode;
the liquid pipe is provided with a through hole on the outer wall of the cavity of the nozzle base, and the through hole is communicated with the cavity of the nozzle base;
the bottom end of the nozzle base is provided with an air inlet which is communicated with the inner space of a liquid pipe penetrating through the cavity of the nozzle base.
Optionally, a second sleeve is arranged outside the gas-liquid distribution body, the liquid flow pipe and the gas flow pipe.
Optionally, the tail end of the second sleeve is further connected with a third sleeve, and when the whole spray gun is installed on the boiler, the length of the whole spray gun extending into the boiler can be adjusted through the third sleeve.
Optionally, a protective layer is bonded outside the first sleeve, the thickness of the protective layer is 10-20 mm, and the protective layer is made of a wear-resistant fireproof plastic material or a silicon carbide material.
Optionally, the nozzle base and the nozzle are connected by screw thread sealing.
The technical scheme provided by the invention has the following beneficial effects: the novel denitration spray gun provided by the invention has the advantages that reducing agent liquid enters from the reducing agent inlet, flows along the inner wall of the liquid pipe and is sprayed out from the through hole on the liquid pipe, compressed air enters the first sleeve pipe from the compressed air inlet and is sprayed out from the air inlet arranged at the bottom end of the nozzle base, fine fog drops which are atomized into 40-80 mu m are mixed in the cavity of the nozzle base, and then the fine fog drops enter the nozzle to be sprayed out; the invention separately conveys gas and liquid, and simultaneously designs the gas-liquid mixing of the original spray gun into independent mixing of each nozzle; because the through-hole internal diameter on the liquid pipe and the through-hole internal diameter of air inlet are all very little, set up to 3 ~ 5 circumstances at the nozzle base, liquid spouts from the through-hole on the liquid pipe, and gaseous air inlet blowout from the nozzle base bottom sets up, then when mixing in the nozzle base cavity, the internal pressure of whole rifle basically remains stable to make every nozzle flow of spray gun unanimous, the fluid atomization is also very even, and denitration efficiency obviously improves.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a novel denitration nozzle base provided in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a novel denitration spray gun provided in an embodiment of the present invention.
Description of the reference numerals: 1. a nozzle base; 2. a nozzle; 3. a liquid pipe; 4. an air inlet; 5. a gas-liquid distribution body; 6. a first sleeve; 7. a second sleeve; 8. a third sleeve; 9. a protective layer; 3-1, through holes; 5-1, a reducing agent inlet; 5-2, a compressed air inlet; 5-3, a liquid flow pipe; 5-4, a gas flow pipe.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention; it is to be understood that the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
Current flue gas denitration processes include SNCR and SCR, with NO in the boiler tail gas X The SNCR cannot meet the denitration requirement, so that only an SCR (selective catalytic reduction) process or an SNCR + SCR combined process can be used. The SNCR + SCR combined process is characterized in that the front part adopts SNCR, and the rear part adopts SCR: the main arrangement mode is that a spray gun is arranged at a bending angle part in front of a coal economizer at the rear part of a boiler flue, and urea solution or ammonia water solution is sprayed. In the process, a urea pyrolysis furnace or a liquid ammonia evaporator is not needed, and urea pyrolysis or ammonia water evaporation is directly carried out by using the temperature of flue gas. The urea pyrolysis furnace or the liquid ammonia evaporator has very high manufacturing cost, the investment can be reduced by adopting the process, only one layer of catalyst is needed, and the maintenance cost is lower. In order to meet the requirements of the SCR process, on the basis of a single-nozzle short spray gun used in the original SNCR process, a long spray gun with a plurality of spray heads is developed and designed, namely the spray heads are arranged on a gun rod, the gun rod of the spray gun is horizontally lengthened, and a plurality of spray heads are simultaneously spaced at a certain distance along the horizontal direction; the spray gun continues to use the rear-end mixing structure principle of the original spray gun, and due to the lengthening of the spray gun and the increase of spray heads, a gas-liquid mixture in a gun rod has certain pressure loss when passing through one spray nozzle, so that the spray pressure of each spray nozzle on the spray gun is unequal, the flow of each spray nozzle is different, particularly, the atomization inconsistency is influenced by the pressure loss, the spray nonuniformity of the spray gun is caused, and the desulfurization efficiency is reduced.
The single-tube conveying of the original gun rod is designed in such a way that reducing agent liquid enters from a reducing agent inlet 5-1, flows along the inner wall of a liquid tube 3 and is sprayed out from a through hole 3-1 on the liquid tube 3, compressed air enters a first sleeve 6 from a compressed air inlet 5-2 and is sprayed out from an air inlet 4 arranged at the bottom end of a nozzle base 1, and the reducing agent liquid is mixed and atomized into fine mist drops of 40-80 mu m in a cavity of the nozzle base 1 and then enters a nozzle 2 to be sprayed out; the invention separately conveys gas and liquid, and simultaneously designs the gas-liquid mixing of the original spray gun into the independent mixing of each nozzle; because the inner diameter of the through hole 3-1 on the liquid pipe 3 and the inner diameter of the through hole of the air inlet 4 are both very small, under the condition that the nozzle base 1 is set to be 3-5, liquid is sprayed out from the through hole 3-1 on the liquid pipe 3, gas is sprayed out from the air inlet 4 arranged at the bottom end of the nozzle base 1, and then when the gas is mixed in the cavity of the nozzle base 1, the pressure in the whole gun body is basically kept stable, so that the flow of each nozzle of the spray gun is consistent, the fluid atomization is also very uniform, and the denitration efficiency is obviously improved.
In order to make the technical solution of the present invention better understood, the present invention will be further described in detail with reference to the accompanying drawings and examples.
Example 1:
fig. 1 is a schematic structural diagram of a novel denitration nozzle base according to an embodiment of the present invention, which includes a nozzle base 1, a nozzle 2, a liquid pipe 3, and an air inlet 4, wherein,
a cavity with an opening at one end is arranged in the nozzle base 1;
the nozzle 2 is arranged at the opening of the cavity in a sealing way, and a through hole in the nozzle 2 is communicated with the space in the cavity;
the liquid pipe 3 penetrates through the cavity of the nozzle base 1, and the liquid pipe 3 is connected with the nozzle base 1 in a sealing mode;
the liquid pipe 3 is provided with a through hole 3-1 on the outer wall of the cavity of the nozzle base 1, and the through hole 3-1 is communicated with the cavity of the nozzle base 1;
the bottom end of the nozzle base 1 is provided with an air inlet 4, and the air inlet 4 is communicated with the inner space of a liquid pipe 3 penetrating through the cavity of the nozzle base 1.
Preferably, the axes of the through hole 3-1 and the air inlet 4 are arranged on the same straight line; because the liquid reducing agent in the liquid pipe 3 is not pure liquid and is possibly doped with crystalline substances, the axes of the through hole 3-1 and the through hole in the nozzle 2 can be arranged on the same straight line, if the liquid pipe 3 positioned at the upper part is blocked, the nozzle 2 can be disassembled, the blocked part, namely the through hole 3-1, is treated, and the maintenance is convenient.
Preferably, the nozzle base 1 is connected with the nozzle 2 in a sealing mode through threads, the disassembly is convenient, and the nozzle 2 can be replaced according to the production process requirements.
The specific working principle of the invention is as follows: the liquid path may be described as: the liquid reducing agent enters from the liquid pipe 3 and is sprayed out from a through hole 3-1 on the liquid pipe 3; the gas pathway can be described as: compressed air is sprayed out from an air inlet 4 arranged at the bottom end of the nozzle base 1 and enters a cavity of the nozzle base 1; the mixing path may be described as: the liquid reducing agent is sprayed out through the through hole 3-1 on the liquid pipe 3 and the gas sprayed out from the gas inlet 4 is mixed in the cavity of the nozzle base 1, atomized into fine mist drops of 40-80 microns and sprayed out from the nozzle 2.
In addition, the flow rate and the size of the atomized particle diameter of each nozzle are determined by the three parameters of the inner diameter of the through hole 3-1 on the liquid pipe 3, the inner diameter of the air inlet 4 and the specification of the nozzle 2, so the nozzle base 1 and the nozzle 2 can be designed independently according to the requirements of the denitration process, and the nozzle has strong flexibility and practicability.
Example 2:
fig. 2 is a schematic structural view of a denitration lance according to the present invention, which comprises a multi-nozzle denitration lance shank including a plurality of nozzle bases 1, gas-liquid distribution bodies 5, liquid pipes 3, and first sleeves 6 as described in example 1, wherein,
the nozzle bases 1 are sequentially connected in a sealing manner along the horizontal direction, and the inner spaces of the nozzle bases are communicated with each other;
the gas-liquid distribution body 5 comprises a reducing agent inlet 5-1 and a compressed air inlet 5-2;
the first sleeve 6 is arranged outside the liquid pipe 3;
the reducing agent inlet 5-1 is hermetically connected with the left end of the liquid pipe 3 through a liquid flow pipe 5-3 arranged in the horizontal direction of the gas-liquid distribution body 5, and the inner spaces of the liquid pipe 3 are communicated with each other;
the compressed air inlet 5-2 is connected with the left end of the first sleeve 6 in a sealing mode through a gas flow pipe 5-4 arranged in the horizontal direction of the gas-liquid distribution body 5, and the inner spaces of the compressed air inlet and the gas-liquid distribution body are communicated with each other.
Preferably, the liquid flow pipe 5-3 is disposed above the gas flow pipe 5-4.
Preferably, the number of nozzle bases 1 is 3, 4 or 5.
Example 3:
fig. 2 is a schematic structural diagram of a denitration spray gun according to the present invention, the denitration spray gun includes a gas-liquid distribution body 5, a liquid pipe 3 hermetically connected to a liquid flow pipe 5-3 disposed in a horizontal direction of the gas-liquid distribution body 5, and a first sleeve 6 disposed outside the liquid pipe 3, the liquid pipe 3 is provided with a nozzle base 1, and the nozzle base 1 is provided with a nozzle 2; wherein, the first and the second end of the pipe are connected with each other,
a gas flow pipe 5-4 arranged in the horizontal direction of the gas-liquid distribution body 5 is hermetically connected with the left end of the first sleeve 6, and the inner spaces of the gas flow pipe and the first sleeve are communicated with each other;
a cavity with an opening at one end is arranged in the nozzle base 1;
the nozzle 2 is hermetically arranged at the opening of the cavity, and the nozzle 2 is communicated with the space in the cavity;
the liquid pipe 3 penetrates through the cavity of the nozzle base 1, and the liquid pipe 3 is connected with the nozzle base 1 in a sealing mode;
the liquid pipe 3 is provided with a through hole 3-1 on the outer wall of the cavity of the nozzle base 1, and the through hole 3-1 is communicated with the cavity of the nozzle base 1;
the bottom end of the nozzle base 1 is provided with an air inlet 4, and the air inlet 4 is communicated with the inner space of a liquid pipe 3 penetrating through the cavity of the nozzle base 1.
Preferably, the gas-liquid distribution body 5, the liquid flow pipe 5-3 and the gas flow pipe 5-4 are provided with second sleeves 7 at the outer sides, so that the part of the spray gun is effectively protected from collision and damage, and the other aesthetic feeling of the spray gun is increased.
Preferably, the tail end of the second sleeve 7 is further connected with a third sleeve 8, and when the whole spray gun is installed on the boiler, the length of the whole spray gun extending into the boiler can be adjusted through the third sleeve 8.
Preferably, a protective layer 9 is bonded outside the first sleeve 6, the thickness of the protective layer 9 is 10-20 mm, the protective layer 9 is made of a wear-resistant fireproof plastic material or a silicon carbide material, and the material is high-temperature resistant, corrosion resistant and wear resistant, so that the spray gun is effectively protected from corrosion and wear in a hearth, and the service life of the spray gun is prolonged. In addition, the denitration spray gun does not need to be designed with air cooling and circulating water cooling, so that the structure of the spray gun is simplified, the energy consumption is saved, a large amount of equipment investment is saved for users, and the running cost of the equipment is reduced.
Preferably, the nozzle base 1 is connected with the nozzle 2 in a sealing mode through threads, the disassembly is convenient, and the nozzle 2 can be replaced according to the production process requirements.
Preferably, the axes of the first sleeve 6, the second sleeve 7 and the third sleeve 8 are located on the same straight line.
This denitration spray gun, the model and the quantity of installation nozzle 2 are: three series of txcpqil-3 (three nozzles), txcpqil-4 (four nozzles), txcpqil-5 (five nozzles), each series being divided into ten specifications according to the flow rate and spray pattern of the installed nozzle 2. For example, the TXCPII-3 series has five specifications of TXCPII-3/F20 (where F is a fan spray and 20 represents a flow rate of 20 liters/hour for a single nozzle), TXCPII-3/F40, TXCPII-3/F60, TXCPII-3/F90, and TXCPII-3/F150; the TXCPII-3 series also has five specifications TXCPII-3/S20 (S is a solid cone spray, 20 indicates a flow rate of 20 liters/hour for a single nozzle), TXCPII-3/S40, TXCPII-3/S60, TXCPII-3/S90, and TXCPII-3/S150.
When the denitration spray gun is used, the installation position of the whole spray gun can be adjusted according to the actual denitration process requirement, the number of the nozzles 2, the flow rate of the nozzles 2 and the form of the nozzles 2 can be selected according to the specification of a boiler, the reducing agent can be urea solution or ammonia water solution, the liquid reducing agent enters the inner cavity of the gas-liquid distribution body 5 from a reducing agent inlet 5-1 at the pressure of 0.3MPa, flows along the inner wall of the liquid pipe 3 and is sprayed out of the through hole 3-1 on the liquid pipe 3 to the cavity of the nozzle base 1; compressed air enters the inner cavity of the gas-liquid distribution body 5 from a compressed air inlet 5-2 at 0.3-0.4 MPa, enters a first sleeve 6 along a gas flow pipe 5-4 to each nozzle base 1 in sequence, and is sprayed out from an air inlet 4 arranged at the bottom end of each nozzle base 1; then, the liquid reducing agent and the compressed air are mixed and atomized into fine mist droplets of 40 to 80 μm in the cavity of the nozzle base 1, and then enter the nozzle 2 to be sprayed.
The invention separately conveys gas and liquid, and simultaneously designs the gas-liquid mixing of the original spray gun into the independent mixing of each nozzle; because the inner diameter of the through hole 3-1 on the liquid pipe 3 and the inner diameter of the through hole of the air inlet 4 are both very small, under the condition that the nozzle base 1 is set to be 3-5, liquid is sprayed out from the through hole 3-1 on the liquid pipe 3, gas is sprayed out from the air inlet 4 arranged at the bottom end of the nozzle base 1, and then when the gas is mixed in a cavity of the nozzle base 1, the pressure in the whole gun body basically keeps stable, so that the flow of each nozzle of the spray gun is consistent, the fluid atomization is very uniform, and the denitration efficiency is obviously improved.
In addition, because first sleeve 6 has the function of carrying compressed air concurrently, and liquid pipe 3 sets up in the inside of first sleeve 6, the design of the coaxial suit of liquid pipe 3 and first sleeve 6 has reduced the spray gun external diameter to the at utmost to improve the holistic bending strength of spray gun, reduced the holistic diameter of denitration spray gun rifle bar effectively, be adapted to the installation on the various boilers. Meanwhile, the liquid flow pipe 5-3 and the gas flow pipe 5-4 are connected with the gas-liquid distribution body 5 and the first sleeve 6 in a welding mode, and the nozzle base 1 and the liquid pipe 3 are also connected in a welding mode, so that the denitration spray gun is integrally formed into a high-strength spray gun body.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It will be understood that the invention is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. A multi-nozzle denitration spray gun lance is characterized by comprising a nozzle base (1), a nozzle (2), a liquid pipe (3) and an air inlet (4), wherein,
a cavity with an opening at one end is arranged in the nozzle base (1);
the nozzle (2) is hermetically arranged at the opening of the cavity, and the nozzle (2) is communicated with the space in the cavity;
the liquid pipes (3) penetrate through the cavities of the nozzle bases (1), and the liquid pipes (3) are connected with the nozzle bases (1) in a sealing manner;
the liquid pipe (3) is provided with a through hole (3-1) on the outer wall of the cavity of the nozzle base (1), and the through hole (3-1) is communicated with the cavity of the nozzle base (1);
the bottom end of the nozzle base (1) is provided with an air inlet (4), and the air inlet (4) is communicated with the inner space of a liquid pipe (3) penetrating through the cavity of the nozzle base (1);
the axes of the through hole (3-1) and the air inlet (4) are arranged on the same straight line;
the nozzle bases (1) are sequentially connected in a sealing manner along the horizontal direction, and the inner spaces are communicated with each other.
2. The multi-nozzle denitration lance bar of claim 1 further comprising a gas-liquid distribution body (5) and a first sleeve (6), wherein,
the gas-liquid distribution body (5) comprises a reducing agent inlet (5-1) and a compressed air inlet (5-2);
the first sleeve (6) is arranged outside the liquid pipe (3);
the reducing agent inlet (5-1) is connected with the left end of the liquid pipe (3) in a sealing way through a liquid flow pipe (5-3) arranged in the horizontal direction of the gas-liquid distribution body (5), and the inner spaces of the reducing agent inlet and the liquid flow pipe are communicated with each other;
the compressed air inlet (5-2) is connected with the left end of the first sleeve (6) in a sealing mode through a gas flow pipe (5-4) arranged in the horizontal direction of the gas-liquid distribution body (5) and the inner space of the first sleeve is communicated with the inner space of the first sleeve.
3. The multi-nozzle denitration lance bar of claim 2, wherein the liquid flow pipe (5-3) is disposed above the gas flow pipe (5-4).
4. The denitration spray gun is characterized by comprising a gas-liquid distribution body (5), a liquid pipe (3) and a first sleeve (6), wherein the gas-liquid distribution body (5) is sequentially arranged, the liquid pipe (3) is in sealing connection with a liquid flow pipe (5-3) arranged in the horizontal direction of the gas-liquid distribution body (5), the first sleeve (6) is arranged on the outer side of the liquid pipe (3), a nozzle base (1) is arranged on the liquid pipe (3), and a nozzle (2) is arranged on the nozzle base (1); wherein the content of the first and second substances,
a gas flow pipe (5-4) arranged in the horizontal direction of the gas-liquid distribution body (5) is hermetically connected with the left end of the first sleeve (6), and the inner spaces of the gas flow pipe and the first sleeve are communicated with each other;
a cavity with an opening at one end is arranged in the nozzle base (1);
the nozzle (2) is arranged at the opening of the cavity in a sealing manner, and the nozzle (2) is communicated with the space in the cavity;
the liquid pipes (3) penetrate through the cavities of the nozzle bases (1), and the liquid pipes (3) are connected with the nozzle bases (1) in a sealing manner;
the liquid pipe (3) is provided with a through hole (3-1) on the outer wall of the cavity of the nozzle base (1), and the through hole (3-1) is communicated with the cavity of the nozzle base (1);
the bottom end of the nozzle base (1) is provided with an air inlet (4), and the air inlet (4) is communicated with the inner space of a liquid pipe (3) penetrating through the cavity of the nozzle base (1);
wherein the axes of the through hole (3-1) and the air inlet (4) are arranged on the same straight line;
the nozzle bases (1) are sequentially connected in a sealing manner along the horizontal direction, and the inner spaces are communicated with each other.
5. The denitrating lance of claim 4, wherein the gas-liquid distributing body (5) and the liquid flow pipes (5-3) and the gas flow pipes (5-4) are provided with a second jacket pipe (7) on the outside.
6. The denitration lance according to claim 5, characterized in that a third sleeve (8) is also connected to the tail end of the second sleeve (7).
7. The denitration spray gun of claim 4, characterized in that a protective layer (9) is bonded on the outside of the first sleeve (6), the thickness of the protective layer (9) is 10-20 mm, and the protective layer (9) is made of wear-resistant fireproof plastic material or silicon carbide material.
8. The denitration lance according to claim 7, wherein the nozzle base (1) and the nozzle (2) are connected by screw thread sealing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610875418.6A CN106345297B (en) | 2016-09-30 | 2016-09-30 | Novel denitration nozzle base, multi-nozzle denitration spray gun rod and denitration spray gun |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610875418.6A CN106345297B (en) | 2016-09-30 | 2016-09-30 | Novel denitration nozzle base, multi-nozzle denitration spray gun rod and denitration spray gun |
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| CN106345297A CN106345297A (en) | 2017-01-25 |
| CN106345297B true CN106345297B (en) | 2022-11-18 |
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| CN112206941A (en) * | 2020-10-26 | 2021-01-12 | 陕西秦渭绿邦环保科技有限公司 | Efficient mixing spray gun and application |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2558217A1 (en) * | 2010-04-16 | 2013-02-20 | Wurz, Dieter | Externally mixing multi-component nozzle |
| CN204220334U (en) * | 2014-10-13 | 2015-03-25 | 北京洛卡环保技术有限公司 | A kind of denitrating flue gas directly sprays spraying urea liquid emitter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103433165A (en) * | 2013-08-19 | 2013-12-11 | 江苏新中环保股份有限公司 | Compressed air and ammonia-water solution directional metering and dispensing device |
| CN205324028U (en) * | 2015-12-10 | 2016-06-22 | 珠海市斗门区旭日陶瓷有限公司 | Two -fluid ceramic kiln denitration spray gun |
| CN206273336U (en) * | 2016-09-30 | 2017-06-23 | 上海守望者喷雾智能系统有限公司 | Novel denitration nozzle base, multiinjector denitration spray gun barral of a gun and denitration spray gun |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2558217A1 (en) * | 2010-04-16 | 2013-02-20 | Wurz, Dieter | Externally mixing multi-component nozzle |
| CN204220334U (en) * | 2014-10-13 | 2015-03-25 | 北京洛卡环保技术有限公司 | A kind of denitrating flue gas directly sprays spraying urea liquid emitter |
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