CN106390729B - Desulfurization and denitrification oil field steam injection boiler and method - Google Patents
Desulfurization and denitrification oil field steam injection boiler and method Download PDFInfo
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- CN106390729B CN106390729B CN201611109133.8A CN201611109133A CN106390729B CN 106390729 B CN106390729 B CN 106390729B CN 201611109133 A CN201611109133 A CN 201611109133A CN 106390729 B CN106390729 B CN 106390729B
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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
- B01D53/81—Solid phase processes
- B01D53/82—Solid phase processes with stationary reactants
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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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
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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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
- B01D53/565—Nitrogen oxides by treating the gases with solids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/128—Solid reactants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
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Abstract
The invention relates to an oil field steam injection boiler, in particular to a desulfurization and denitrification oil field steam injection boiler and a method. The technical scheme is as follows: the special powder desulfurizer and the denitrifier are sprayed into the hearth of the oil field fuel steam injection boiler to perform chemical reaction with nitrogen oxide and sulfur dioxide in the flue gas to generate dust-like substances easy to remove, and the dust and residual nitrogen oxide and sulfur dioxide in the flue gas are removed by combining with a subsequent skid-mounted flue gas desulfurization and denitrification device of the oil field steam injection boiler. The beneficial effects are that: 1) the equipment required by the invention has less one-time investment, 2) the running cost is low, and 3) the desulfurization and denitrification effects are good, SO that the emission concentrations of SO2 and NOX can be brought into the required smoke emission standard at the same time; 4) No secondary pollution, low ammonia escape, no need of adding an ammonia recovery device, no need of secondary pollution treatment and the like; 5) The equipment has small volume, small occupied area and easy movement; 6) The construction period is short, and the installation time is only one week after the equipment arrives at the site.
Description
Technical Field
The invention relates to an oil field steam injection boiler, in particular to a desulfurization and denitrification oil field steam injection boiler and a method.
Background
The movable fuel oil steam injection boiler is key equipment in the oil field crude oil extraction process and has the following characteristics: 1) The fuel oil steam injection boiler has the characteristics of wide distribution range and dispersion, and the equipment management levels in different areas are different; 2) The fuel oil steam injection boiler often needs to be moved, so that the equipment is relatively small and compact in size and convenient to move; 3) The fuel oil steam injection boiler is placed in the field and is moved frequently, so that a perfect sewage treatment system is not provided;
the technical current situation of desulfurization and denitrification of boiler tail gas is as follows:
1) Denitration technical status quo
Selective catalytic reduction process (SCR)
The method is carried out by using NH 3 And a catalyst, wherein NOx is reduced to N at a suitable reaction temperature (330 to 400 ℃) 2 . Reaction is selective, NH 3 React only with NOx, substantially not with O 2 The reaction is called selective catalytic reduction denitration. The SCR denitration process system can be divided into a liquid ammonia storage and transportation system, an ammonia preparation and supply system, an ammonia/air mixing system, an ammonia injection system, an SCR reactor system, a wastewater absorption treatment system and the like. SCR denitration is fixed denitration outside the furnace, and the system occupies a large area; the reaction temperature is low; the catalyst is easy to be poisoned; the high-dispersity dust can cover the surface of the catalyst, so that the activity of the catalyst is reduced; unreacted NH 3 And SO in flue gas 2 Acting to produce readily erodible and occluded (NH) 4 ) 2 SO 4 、(NH 4 ) 2 SO 3 While reducing NH 3 The utilization ratio of (2); the investment and operating costs are high.
Selective non-catalytic reduction process (SNCR)
In the narrow range of 950 to 1050 ℃, NO catalyst is needed, ammonia only reacts with NO in the smoke and does not react with oxygen generally, and the method is also called as a selective non-catalyst absorption (SNCR) method. A typical SNCR process system consists of a reducing storage tank, a plurality of layers of reducing agent injection devices, control instruments matched with the reducing storage tank and the reducing agent injection devices, and the like. The flue gas denitration process of the SNCR system is completed by the following four basic processes: receiving, storing and preparing a reducing agent; metering and outputting the reducing agent, and mixing and diluting the reducing agent with water; injecting the diluted reducing agent into a proper position of the boiler; the reducing agent is mixed with the flue gas to carry out denitration reaction. The denitration efficiency of the SNCR denitration process is not high; NH (NH) 3 High NOx, large ammonia slip and generated (NH) 4 ) 2 SO 4 、(NH 4 ) 2 SO 3 Can clog or corrode the air preheater; the consumption of reactants and carrying media (air) is high; the ammonia has obvious effect of reducing NO only at 950 to 1050 ℃, and the temperature window is narrow.
2) State of the art of desulfurization
Desulfurization by alkaline process
The method comprises the steps of blending alkali liquor (NaOH) with a certain concentration, conveying the alkali liquor to a desulfurizing tower by using an alkali liquor pump, atomizing the liquid and SO in flue gas by using a high-efficiency atomizing nozzle 2 And reacting to achieve the aim of desulfurization. The alkaline desulfurization process system consists of an alkali liquor preparation system, a desulfurization tower, a desulfurization liquid circulating system and a wastewater treatment system. The alkaline desulfurization system occupies a large area, and the equipment is fixed and cannot move; sewage is generated.
3) Traditional desulfurization and denitrification characteristics are summarized
Through analyzing the process flow and characteristics of the traditional SCR, SNCR and alkaline desulfurization, we can see that the desulfurization and denitrification methods are not suitable for steam injection boilers in oil fields, and a new process is needed to solve the problem of desulfurization and denitrification of the steam injection boilers.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a desulfurization and denitrification oilfield steam injection boiler and a method, wherein a powder conveying device is adopted to spray a desulfurizing agent and a denitrifying agent into a hearth or a flue region with the temperature of 800-1200 ℃, and the desulfurizing agent and the denitrifying agent are activated and gasified at high temperature and then react with NOx and SO in flue gas 2 Chemical reaction, reduction to N 2 /H 2 O and sulfate particles, and simultaneously, the dosage of the reagent can be adjusted according to the specific environmental protection emission index requirements, thereby achieving the aims of desulfurization and denitrification.
The invention provides a desulfurization and denitrification oil field steam injection boiler which mainly comprises a medicament conveying pry (1), a medicament spraying system (2) and a fuel oil steam injection boiler (3), wherein one side of the fuel oil steam injection boiler (3) is provided with the medicament conveying pry (1), and a denitrification agent and a desulfurization agent are conveyed to the fuel oil steam injection boiler (3) through the medicament spraying system (2), wherein the medicament conveying pry (1) comprises an electric cabinet (6), a denitrification agent conveying pump (7), a denitrification agent storage tank (8), a base (9), a desulfurization agent conveying pump (10) and a desulfurization agent storage tank (11), the electric cabinet (6) is connected with and controls the denitrification agent conveying pump (7) and the desulfurization agent conveying pump (10), and the denitrification agent conveying pump (7) and the desulfurization agent conveying pump (10) are respectively connected with the denitrification agent storage tank (8) and the desulfurization agent storage tank (11); in addition, the agent spraying and conveying system (2) is composed of conveying pipelines (12), a denitration agent conveying gate valve (13), a denitration agent spray head (14), a denitration agent spraying and conveying inner pipe (15), a desulfurizer spray head (16), a desulfurizer spraying and conveying inner pipe (17) and a desulfurizer conveying gate valve (18), wherein one conveying pipeline (12) is connected with the denitration agent spray head (14) through the denitration agent conveying gate valve (13) and the denitration agent spraying and conveying inner pipe (15), and the other conveying pipeline (12) is connected with the desulfurizer spray head (16) through the desulfurizer conveying gate valve (18) and the desulfurizer spraying and conveying inner pipe (17).
The main components of the fuel oil steam injection boiler (3) participating in desulfurization and denitration are a radiation section (19), a transition section (20) and a convection section (21).
Denitration agent spraying inner tube (15) and denitration agent shower nozzle (14) transversely total two sets of in radiation section (19) afterbody, and denitration agent shower nozzle (14) blowout angle is 90 degrees, transversely covers whole flue gas cross-section, and the injection direction is facing to the flue gas flow direction.
The denitrifier spray head (14) sprays out at the section of which the flue gas temperature is 950-1200 ℃.
Two groups of desulfurizer spraying inner pipes (17) and desulfurizer nozzles (16) are arranged transversely in the middle section of a transition section (20) of the fuel oil steam injection boiler (3), the spraying angle of the desulfurizer nozzles (16) is 90 degrees, the nozzles transversely cover the whole flue gas section, and the spraying direction faces the flue gas flow direction.
The desulfurizer spray head (16) sprays out at the section of the flue gas temperature of 800-950 ℃.
The end-to-end connection tobacco pipe (4) of convection current section (21) of fuel steam injection boiler (3), tobacco pipe (4) are connected to sled dress oil field steam injection boiler flue gas desulfurization denitrification facility (5).
The invention provides a using method of a desulfurization and denitrification oil field steam injection boiler, which comprises the following steps:
a) The denitration agent passes through a denitration agent conveying gate valve (13) and a denitration agent spraying inner pipe (15) along a conveying pipeline (12), is sprayed out at a section with the flue gas temperature of 950-1200 ℃ through a denitration agent spray head (14), the denitration agent spraying inner pipe (15) and the denitration agent spray head (14) are divided into two groups at the tail part of a radiation section (19) in a transverse direction, the spraying angle of the denitration agent spray head (14) is 90 degrees, the whole cross section of the flue gas is transversely covered, and the spraying direction faces the flow direction of the flue gas, so that after the flue gas is fully mixed with the denitration agent, the contact reaction time is effectively prolonged in the flowing process towards the rear part, the flue gas can be mixed with the flue gas which is not sprayed and reacts, and the denitration effect is improved; in the process, the denitration agent is heated and decomposed, and reacts with nitric oxide in the flue under the water vapor environment generated by self decomposition to produce nitrogen, carbon dioxide and ammonia; the generated ammonia gas continuously reacts with nitric oxide and nitrogen dioxide in the flue to generate nitrogen gas and water vapor;
b) The desulfurizer passes through a desulfurizer conveying gate valve (18) and a desulfurizer spray delivery inner pipe (17) along a conveying pipeline (12), is sprayed out at a section with the flue gas temperature of 800-950 ℃ through a desulfurizer spray head (16), the desulfurizer spray delivery inner pipe (17) and the desulfurizer spray head (16) are divided into two groups transversely at the middle section of a transition section (20), the spray angle of the desulfurizer spray head (16) is 90 degrees, the whole flue gas section is transversely covered, the spray direction faces the flue gas flow direction, and therefore after the flue gas is fully mixed with the desulfurizer, the contact reaction time is effectively prolonged in the rear flow process, and the flue gas can be mixed with the flue gas which is not sprayed and reacts; in the process, the desulfurizing agent is combined with sulfur dioxide to generate sodium sulfite, the sodium sulfite exists in a gas form at the flue temperature, and reacts with oxides in the desulfurizing agent to generate liquid sodium sulfate;
c) The flue gas passes through denitrifier, desulfurizer after the full reaction, forms nitrogen gas and sulfate dust granule, in addition there is a small amount of nitrogen oxide, sulfur dioxide pollutant that do not react, and the flue gas passes through tobacco pipe (4) and introduces skid-mounted oil field steam injection boiler flue gas desulfurization denitrification facility (5), and the device is with dust and the thorough desorption of residual nitrogen oxide and sulfur dioxide in the flue gas.
The denitration agent is powdered urea, and the desulfurizer is powdered calcium carbonate.
The beneficial effects of the invention are: 1) the equipment required by the invention has less one-time investment, 2) the running cost is low, and 3) the desulfurization and denitrification effects are good, SO that the emission concentrations of SO2 and NOX can be brought into the required smoke emission standard at the same time; 4) No secondary pollution, low ammonia escape, no need of adding an ammonia recovery device, no need of secondary pollution treatment and the like; 5) The equipment has small volume, small occupied area and easy movement; 6) The construction period is short, and the installation time is only one week after the equipment arrives at the site.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 isbase:Sub>A view of the structure A-A of FIG. 1;
FIG. 4 is a view of the structure of B-B in FIG. 1;
in the upper diagram: the device comprises a medicament conveying pry (1), a medicament spraying and conveying system (2), a fuel oil steam injection boiler (3), a smoke pipe (4), a skid-mounted oil field steam injection boiler flue gas desulfurization and denitration device (5), an electric cabinet (6), a denitration agent delivery pump (7), a denitration agent storage tank (8), a base (9), a desulfurizer delivery pump (10), a desulfurizer storage tank (11), a delivery pipeline (12), a denitration agent delivery gate valve (13), a denitration agent sprayer (14), a denitration agent spraying and conveying inner pipe (15), a desulfurizer sprayer (16), a desulfurizer spraying and conveying inner pipe (17), a desulfurizer delivery gate valve (18), a radiation section (19), a transition section (20) and a convection section (21).
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
the invention provides a desulfurization and denitrification oilfield steam injection boiler which mainly comprises a medicament conveying pry (1), a medicament spraying system (2) and a fuel oil steam injection boiler (3), wherein the medicament conveying pry (1) is arranged on one side of the fuel oil steam injection boiler (3), and a denitrifying agent and a desulfurizing agent are conveyed to the fuel oil steam injection boiler (3) through the medicament spraying system (2), wherein the medicament conveying pry (1) consists of an electric cabinet (6), a denitrifying agent conveying pump (7), a denitrifying agent storage tank (8), a base (9), a desulfurizing agent conveying pump (10) and a desulfurizing agent storage tank (11), the electric cabinet (6) is connected with and controls the denitrifying agent conveying pump (7) and the desulfurizing agent conveying pump (10), and the denitrifying agent conveying pump (7) and the desulfurizing agent conveying pump (10) are respectively connected with the denitrifying agent storage tank (8) and the desulfurizing agent storage tank (11); in addition, the agent spraying and conveying system (2) is composed of conveying pipelines (12), a denitration agent conveying gate valve (13), a denitration agent spray head (14), a denitration agent spraying and conveying inner pipe (15), a desulfurizer spray head (16), a desulfurizer spraying and conveying inner pipe (17) and a desulfurizer conveying gate valve (18), wherein one conveying pipeline (12) is connected with the denitration agent spray head (14) through the denitration agent conveying gate valve (13) and the denitration agent spraying and conveying inner pipe (15), and the other conveying pipeline (12) is connected with the desulfurizer spray head (16) through the desulfurizer conveying gate valve (18) and the desulfurizer spraying and conveying inner pipe (17).
The main components of the fuel oil steam injection boiler (3) participating in desulfurization and denitration are a radiation section (19), a transition section (20) and a convection section (21).
Denitration agent spraying inner tube (15) and denitration agent shower nozzle (14) transversely total two sets of in radiation section (19) afterbody, and denitration agent shower nozzle (14) blowout angle is 90 degrees, transversely covers whole flue gas cross-section, and the injection direction is facing to the flue gas flow direction.
The denitrifier spray head (14) sprays out at the section of the flue gas temperature of 950-1200 ℃.
The desulfurizer spraying inner pipes (17) and desulfurizer nozzles (16) are arranged in two groups transversely in the middle section of a transition section (20) of the fuel oil steam injection boiler (3), the spraying angle of the desulfurizer nozzles (16) is 90 degrees, the whole flue gas section is transversely covered, and the spraying direction faces the flue gas flow direction.
The desulfurizer spray head (16) sprays out at the section of the flue gas temperature of 800-950 ℃.
The tail end of a convection section (21) of the fuel oil steam injection boiler (3) is connected with a smoke pipe (4), and the smoke pipe (4) is connected with a skid-mounted oil field steam injection boiler flue gas desulfurization and denitrification device (5); the denitration agent is powdered urea, and the desulfurizer is powdered calcium carbonate.
The invention provides a using method of a desulfurization and denitrification oil field steam injection boiler, which comprises the following steps:
a) The denitration agent passes through a denitration agent conveying gate valve (13) and a denitration agent spraying inner pipe (15) along a conveying pipeline (12), is sprayed out at a section with the temperature of 950-1200 ℃ through a denitration agent spray head (14), the denitration agent spraying inner pipe (15) and the denitration agent spray head (14) are divided into two groups transversely at the tail part of a radiation section (19), the spraying angle of the denitration agent spray head (14) is 90 degrees, the whole flue gas section is transversely covered, and the spraying direction faces the flue gas flow direction, so that after the flue gas is fully mixed with the denitration agent, the contact reaction time is effectively prolonged in the rear flowing process, the flue gas can be mixed with the flue gas which is not sprayed and reacts, and the denitration effect is improved; in the process, the denitration agent is heated and decomposed, and reacts with nitric oxide in the flue under the water vapor environment generated by self decomposition to produce nitrogen, carbon dioxide and ammonia; the generated ammonia gas continuously reacts with nitric oxide and nitrogen dioxide in the flue to generate nitrogen and water vapor;
b) The desulfurizer passes through a desulfurizer conveying gate valve (18) and a desulfurizer spray-feeding inner pipe (17) along a conveying pipeline (12), is sprayed out at the section of the flue gas temperature of 800-950 ℃ through a desulfurizer spray head (16), the desulfurizer spray-feeding inner pipe (17) and the desulfurizer spray head (16) are divided into two groups transversely at the middle section of a transition section (20), the spray angle of the desulfurizer spray head (16) is 90 degrees, the whole flue gas section is transversely covered, the spray direction faces the flow direction of the flue gas, so that after the flue gas is fully mixed with the desulfurizer, the contact reaction time is effectively prolonged in the backward flowing process, and the flue gas can be mixed with the flue gas which is not sprayed and reacts; in the process, the desulfurizing agent is combined with sulfur dioxide to generate sodium sulfite, the sodium sulfite exists in a gas form at the temperature of a flue, and sodium sulfate in a liquid form is generated after the sodium sulfite reacts with oxides in the desulfurizing agent;
c) The flue gas passes through denitrifier, desulfurizer after the full reaction, forms nitrogen gas and sulfate dust granule, in addition there is a small amount of nitrogen oxide, sulfur dioxide pollutant that do not react, and the flue gas passes through tobacco pipe (4) and introduces skid-mounted oil field steam injection boiler flue gas desulfurization denitrification facility (5), and the device is with dust and the thorough desorption of residual nitrogen oxide and sulfur dioxide in the flue gas.
It needs to be further explained that: the subsequent smoke treatment of the invention: since the sprayed medicament is powdery particles, dust is increased. Through the analysis of the reaction product, the dust increased by denitration is 2-3 mg/m < 3 >, the dust increased by desulfuration is relatively more, about 60-70% of the amount of the desulfuration reagent, and the dust increased by desulfuration should be considered. In addition, a small amount of nitrogen oxides, sulfur dioxide and the like still remain unreacted after desulfurization and denitrification, and residual nitrogen oxides and sulfur dioxide in dust and flue gas are removed by introducing the flue gas into a skid-mounted flue gas desulfurization and denitrification device of an oil field steam injection boiler.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (2)
1. The utility model provides a SOx/NOx control oil field steam injection boiler which characterized by: the denitration agent and desulfurizer combined device mainly comprises a medicament conveying pry (1), a medicament spraying system (2) and a fuel oil steam injection boiler (3), wherein the medicament conveying pry (1) is arranged on one side of the fuel oil steam injection boiler (3), and a denitration agent and a desulfurizer are conveyed to the fuel oil steam injection boiler (3) through the medicament spraying system (2), wherein the medicament conveying pry (1) consists of an electric cabinet (6), a denitration agent conveying pump (7), a denitration agent storage tank (8), a base (9), a desulfurizer conveying pump (10) and a desulfurizer storage tank (11), the electric cabinet (6) is connected with and controls the denitration agent conveying pump (7) and the desulfurizer conveying pump (10), and the denitration agent conveying pump (7) and the desulfurizer conveying pump (10) are respectively connected with the denitration agent storage tank (8) and the desulfurizer storage tank (11); in addition, the agent spraying system (2) consists of conveying pipelines (12), a denitration agent conveying gate valve (13), a denitration agent spray head (14), a denitration agent spraying inner pipe (15), a desulfurizer spray head (16), a desulfurizer spraying inner pipe (17) and a desulfurizer conveying gate valve (18), wherein one conveying pipeline (12) is connected with the denitration agent spray head (14) through the denitration agent conveying gate valve (13) and the denitration agent spraying inner pipe (15), and the other conveying pipeline (12) is connected with the desulfurizer spray head (16) through the desulfurizer conveying gate valve (18) and the desulfurizer spraying inner pipe (17);
the main components of the fuel oil steam injection boiler (3) participating in desulfurization and denitration are a radiation section (19), a transition section (20) and a convection section (21);
the denitration agent spraying inner pipe (15) and the denitration agent sprayer (14) are divided into two groups at the tail part of the radiation section (19) in a transverse mode, the spraying angle of the denitration agent sprayer (14) is 90 degrees, the whole flue gas section is covered transversely, and the spraying direction faces the flue gas flow direction;
the denitrifier spray head (14) sprays out at the section of the flue gas temperature of 950-1200 ℃;
the desulfurizer spraying inner pipe (17) and the desulfurizer spray heads (16) are arranged in two groups transversely at the middle section of the transition section (20) of the fuel oil steam injection boiler (3), the spraying angle of the desulfurizer spray heads (16) is 90 degrees, the whole flue gas section is transversely covered, and the spraying direction faces the flue gas flow direction;
the desulfurizer spray head (16) sprays out at the section of the flue gas temperature of 800-950 ℃;
the tail end of a convection section (21) of the fuel oil steam injection boiler (3) is connected with a smoke pipe (4), and the smoke pipe (4) is connected with a skid-mounted oil field steam injection boiler flue gas desulfurization and denitrification device (5);
the use method of the desulfurization and denitrification oil field steam injection boiler comprises the following steps:
a) The denitration agent passes through a denitration agent conveying gate valve (13) and a denitration agent spraying inner pipe (15) along a conveying pipeline (12), is sprayed out at a section with the flue gas temperature of 950-1200 ℃ through a denitration agent spray head (14), the denitration agent spraying inner pipe (15) and the denitration agent spray head (14) are divided into two groups at the tail part of a radiation section (19) in a transverse direction, the spraying angle of the denitration agent spray head (14) is 90 degrees, the whole cross section of the flue gas is transversely covered, and the spraying direction faces the flow direction of the flue gas, so that after the flue gas is fully mixed with the denitration agent, the contact reaction time is effectively prolonged in the flowing process towards the rear part, the flue gas can be mixed with the flue gas which is not sprayed and reacts, and the denitration effect is improved; in the process, the denitration agent is heated and decomposed, and reacts with nitric oxide in the flue under the water vapor environment generated by self decomposition to produce nitrogen, carbon dioxide and ammonia; the generated ammonia gas continuously reacts with nitric oxide and nitrogen dioxide in the flue to generate nitrogen and water vapor;
b) The desulfurizer passes through a desulfurizer conveying gate valve (18) and a desulfurizer spray-feeding inner pipe (17) along a conveying pipeline (12), is sprayed out at the section of the flue gas temperature of 800-950 ℃ through a desulfurizer spray head (16), the desulfurizer spray-feeding inner pipe (17) and the desulfurizer spray head (16) are divided into two groups transversely at the middle section of a transition section (20), the spray angle of the desulfurizer spray head (16) is 90 degrees, the whole flue gas section is transversely covered, the spray direction faces the flow direction of the flue gas, so that after the flue gas is fully mixed with the desulfurizer, the contact reaction time is effectively prolonged in the backward flowing process, and the flue gas can be mixed with the flue gas which is not sprayed and reacts; in the process, the desulfurizing agent is combined with sulfur dioxide to generate sodium sulfite, the sodium sulfite exists in a gas form at the flue temperature, and reacts with oxides in the desulfurizing agent to generate liquid sodium sulfate;
c) The flue gas passes through denitrifier, desulfurizer after the full reaction, forms nitrogen gas and sulfate dust granule, in addition there is a small amount of nitrogen oxide, sulfur dioxide pollutant that do not react, and the flue gas passes through tobacco pipe (4) and introduces skid-mounted oil field steam injection boiler flue gas desulfurization denitrification facility (5), and the device is with dust and the thorough desorption of residual nitrogen oxide and sulfur dioxide in the flue gas.
2. The desulfurization and denitrification oil field steam injection boiler according to claim 1, which is characterized in that: the denitration agent is powdered urea, and the desulfurizer is powdered calcium carbonate.
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| CN112484061A (en) * | 2019-09-11 | 2021-03-12 | 九江精密测试技术研究所 | Novel low discharge system of marine boiler |
| CN111346510A (en) * | 2020-03-06 | 2020-06-30 | 海湾环境科技（北京）股份有限公司 | Gas purification system and gas purification method |
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| JP2003175346A (en) * | 2001-12-12 | 2003-06-24 | Mitsubishi Heavy Ind Ltd | Apparatus and method for spraying |
| JP2010172878A (en) * | 2009-02-02 | 2010-08-12 | Babcock Hitachi Kk | Exhaust gas treatment device of coal-fired boiler of oxygen combustion type and method using this device |
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| CN204865530U (en) * | 2015-08-29 | 2015-12-16 | 顾云国 | Spout calcium desulfurization low temperature denitrification facility in coal fired boiler flue gas stove |
| CN205461720U (en) * | 2016-03-01 | 2016-08-17 | 靳曲 | Coal fired boiler high temperature SOx/NOx control equipment |
| CN106039981B (en) * | 2016-07-20 | 2018-06-08 | 山东神华山大能源环境有限公司 | A kind of chain furnace in-furnace desulfurization, denitration system and method |
| CN206334533U (en) * | 2016-12-02 | 2017-07-18 | 胜利油田胜机石油装备有限公司 | A kind of desulphurization denitration uphole steam generator |
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| JP2010172878A (en) * | 2009-02-02 | 2010-08-12 | Babcock Hitachi Kk | Exhaust gas treatment device of coal-fired boiler of oxygen combustion type and method using this device |
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