WO2020118590A1 - Spray reduction system for sncr denitration in furnace of waste incineration power plant - Google Patents

Spray reduction system for sncr denitration in furnace of waste incineration power plant Download PDF

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WO2020118590A1
WO2020118590A1 PCT/CN2018/120753 CN2018120753W WO2020118590A1 WO 2020118590 A1 WO2020118590 A1 WO 2020118590A1 CN 2018120753 W CN2018120753 W CN 2018120753W WO 2020118590 A1 WO2020118590 A1 WO 2020118590A1
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Prior art keywords
furnace
spray
reducing agent
spray gun
storage tank
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PCT/CN2018/120753
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French (fr)
Chinese (zh)
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刘国辉
梁增英
沈竑
孔华
吴燕琦
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深圳市能源环保有限公司
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Priority to PCT/CN2018/120753 priority Critical patent/WO2020118590A1/en
Publication of WO2020118590A1 publication Critical patent/WO2020118590A1/en

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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
    • 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
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • 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
    • B01D53/77—Liquid phase processes
    • B01D53/79—Injecting reactants

Definitions

  • the utility model relates to a denitration system in a furnace of a waste incineration power plant, in particular to a jet reduction system for SNCR denitration in the furnace of a waste incineration power plant.
  • the selective non-catalytic reduction method is a method of spraying a denitrating agent such as ammonia or urea into the furnace at a flue gas temperature of 850-1100°C under the coexistence of O 2 to reduce nitrogen oxides to nitrogen and water , But the optimal reaction temperature range is 900-950 °C.
  • SNCR denitration technology Compared with the SCR system, SNCR denitration technology has the characteristics of low one-time investment cost and convenient transformation, and has also been widely used in the waste incineration industry.
  • the SNCR process of the waste incineration industry is to open a hole in the front wall of the first vertical flue of the waste incineration boiler, and arrange one or more fixed spray guns to spray the reducing agent into the flue gas.
  • the denitration efficiency of this method is generally very low. , Only at 30-50%, and the ammonia escape rate is high.
  • the fixed spray guns are installed horizontally on the front wall, and the nozzle of the spray gun extends from the wall of the front wall into the furnace flue for spraying. Due to the horizontal installation of the spray gun, there is a tendency for dead spots or no liquid spray in the furnace flue. Overlapping injection and the uneven temperature distribution of the cross section of the waste incineration boiler make it difficult to achieve a good mixing effect of the reducing agent and flue gas. Even if theoretically an infinite number of spray guns can be arranged, the system will be extremely complicated and investment High expense.
  • the utility model provides a spray reduction system for SNCR denitration in the furnace of a waste incineration power plant.
  • the spray gun is installed vertically on the top of the boiler, and the nozzle of the spray gun extends from the top of the boiler into the furnace flue.
  • the spray head of the spray gun sprays liquid on the horizontal surface at 360° around the flue in the furnace.
  • the spray gun automatically expands and contracts under the control of the control system and positions the spray liquid in the furnace for optimal reduction In the reaction temperature area, the spray liquid is sprayed to the surroundings of the furnace at 360° on the horizontal surface, so that the reducing agent is more evenly distributed in the appropriate temperature window, the cross-sectional coverage is improved, the dead zone without reducing agent is reduced, and the The mixing effect improves the denitration efficiency, reduces ammonia slip, and saves operating costs.
  • the solution provided by this practical solution to the technical problem is a jet reduction system for SNCR denitrification in a furnace of a waste incineration power plant, including a desalination water supply system, a reducing agent supply system, a cooling system, a control system, and a spray gun.
  • the desalination water supply system includes a desalination water storage tank, a desalination water delivery pump, and a mixed distribution system in sequence;
  • the reducing agent supply system includes a reducing agent storage tank, a reducing agent delivery pump, and a mixing distribution system in turn;
  • the desalinated water sequentially enters the mixed distribution system from the desalinated water storage tank and the desalted water delivery pump and then enters the spray gun
  • the reducing agent sequentially enters the mixed distribution system from the reducing agent storage tank and the reducing agent delivery pump and then enters the spray gun;
  • the cooling system cools the spray gun;
  • the utility model is characterized in that the spray gun is installed on the top of the boiler in a vertical state, the spray head of the spray gun extends into the furnace flue from the top of the boiler, and the spray head of the spray gun sprays liquid around the flue in the furnace at 360° on the horizontal plane. According to the fluctuation of the working conditions in the furnace, the spray gun automatically expands and contracts under the control of the control system and positions the spray liquid in the temperature region of the optimal reduction reaction in the furnace.
  • the spray gun is a group or groups.
  • the temperature of the optimal reaction zone is 900-950°C.
  • the utility model has beneficial effects: a spray reduction system for SNCR denitration in a furnace of a waste incineration power plant, including a desalination water supply system, a reducing agent supply system, a cooling system, a control system and a spray gun, under the control of the control system ,
  • the cooling system for the spray gun Cooling the spray gun is installed vertically on the top of the boiler, the nozzle of the spray gun extends from the top of the boiler into the furnace flue, and the nozzle of the spray gun sprays the liquid on the horizontal surface at 360° around the flue in the furnace, according to the furnace Under the fluctuation of internal working conditions, the spray gun automatically expands and contracts under the control of the control system and positions the spray liquid in the temperature zone of the
  • FIG. 1 is a schematic diagram of installation of a spray gun according to an embodiment of the prior art.
  • FIGS. 2 to 3 are schematic structural diagrams of the first embodiment of the utility model.
  • Fig. 2 is a schematic diagram of the installation of the spray gun in the first embodiment of the utility model
  • Fig. 3 is a schematic diagram of the system arrangement of the embodiment.
  • FIG. 1 is a schematic diagram of installation of a spray gun according to an embodiment of the prior art.
  • the figure shows that in the prior art, the SNCR process of the waste incineration industry is to open a hole in the front wall 1.21A of the first vertical flue 1.21 of the waste incineration boiler, and arrange fixed spray guns 2.1, 2.2, 2.3 to inject the reduction into the flue gas Agent, the denitration efficiency of this method is generally very low, only 30-50%, and the ammonia escape rate is high.
  • the spray head of the spray gun extends from the wall of the front wall 1.21A into the first vertical flue 1.21 for spraying, because the spray gun is horizontal In the installation state, there is no dead angle or overlapping injection in the flue of the furnace, and the temperature distribution of the cross section of the garbage incinerator is uneven. It is difficult to achieve a good mixing effect of the reducing agent and the flue gas, even in theory An unlimited number of spray guns can be arranged, but the system will be extremely complicated and the investment cost is high.
  • a SNCR denitrification spray reduction system in a waste incineration power plant furnace includes a desalination water supply system, a reducing agent supply system, a cooling system, a control system, and a spray gun.
  • the desalination water The supply system includes a desalinated water storage tank, a desalinated water delivery pump, and a mixed distribution system in sequence; according to the reducing agent delivery direction, the reducing agent supply system includes a reducing agent storage tank, a reducing agent delivery pump, and a mixed distribution system in sequence; in the control system Under control, the desalinated water sequentially enters the mixing and distribution system from the desalinated water storage tank and the desalinated water delivery pump and then enters the spray gun, and the reducing agent sequentially enters the mixing and distribution system from the reducing agent storage tank and the reducing agent delivery pump and then enters the spray gun; Spray gun for cooling.
  • Figure 2 shows that the spray gun 2 is installed vertically on the top of the boiler 1.21B.
  • the spray head of the spray gun 2 extends from the top of the boiler 1.21B into the first vertical flue 1.21.
  • the spray head of the spray gun 2 is 360° toward the flue in the furnace on the horizontal plane
  • the spray liquid is sprayed all around. According to the fluctuation of the working conditions in the furnace, the spray gun 2 automatically expands and contracts under the control of the control system and positions the spray liquid in the temperature region of the optimal reduction reaction in the furnace.
  • the spray gun 2 can be a group of several groups.
  • the temperature of the best reaction area is 900-950 °C.

Abstract

A spray reduction system for SNCR denitration in a furnace of a waste incineration power plant, comprising a demineralized water supply system, a reducing agent supply system, a cooling system, a control system, and spray guns (2.1, 2.2, 2.3). Under the control of the control system, demineralized water enters a mixing and distribution system from a demineralized water storage tank and a demineralized water transfer pump in said order, and then enters the spray guns (2.1, 2.2, 2.3); a reducing agent enters the mixing and distribution system from a reducing agent storage tank and a reducing agent transfer pump in said order, and then enters the spray guns (2.1, 2.2, 2.3); the cooling system cools the spray guns; the spray guns (2.1, 2.2, 2.3) are installed vertically at a top part (1.21B) of a furnace, and spray heads of the spray guns (2.1, 2.2, 2.3) extend from the top part (1.21B) of the furnace into a flue of a furnace cavity (1.1), and the spray heads of the spray guns (2.1, 2.2, 2.3) spray liquid at 360° on a horizontal plane around the flue in the furnace. According to the fluctuation of working conditions in the furnace, the spray guns (2.1, 2.2, 2.3) automatically extend and retract under the control of the control system and position the spray liquid in a temperature region for the optimal reduction reaction in the furnace so as to ensure that the SNCR denitration reaction is always at the optimal temperature window.

Description

一种垃圾焚烧发电厂炉内SNCR脱硝的喷射还原系统Jet reduction system for SNCR denitration in furnace of garbage incineration power plant 技术领域Technical field
本实用实新涉及垃圾焚烧发电厂炉内脱硝系统，尤其涉及一种垃圾焚烧发电厂炉内SNCR脱硝的喷射还原系统。The utility model relates to a denitration system in a furnace of a waste incineration power plant, in particular to a jet reduction system for SNCR denitration in the furnace of a waste incineration power plant.
背景技术Background technique
选择性非催化还原法(SNCR)是在烟气温度850－1100℃，在O 2共存条件下，向炉膛中喷入氨液或尿素等脱硝剂，将氮氧化物还原成为氮气和水的方法，但是其最佳反应温度区间为900-950℃。相对于SCR系统，SNCR脱硝技术具有一次性投资成本低和改造方便的特点，在垃圾焚烧行业也得到了广泛运用。 The selective non-catalytic reduction method (SNCR) is a method of spraying a denitrating agent such as ammonia or urea into the furnace at a flue gas temperature of 850-1100°C under the coexistence of O 2 to reduce nitrogen oxides to nitrogen and water , But the optimal reaction temperature range is 900-950 ℃. Compared with the SCR system, SNCR denitration technology has the characteristics of low one-time investment cost and convenient transformation, and has also been widely used in the waste incineration industry.
目前，垃圾焚烧行业SNCR工艺是在垃圾焚烧锅炉第一垂直烟道前墙开孔，布置一组或多组固定式喷枪，向烟气中喷入还原剂，该方式的脱硝效率一般都很低，只有在30-50％，而且氨逃逸率高。中国专利CN201410593561为解决此问题，在不同高度和截面布置多组喷枪，通过测温反馈至控制系统来控制某根或组喷枪，以此来克服固定式喷枪脱销系统的缺点；但是，此方法也未从根本上解决因垃圾焚烧锅炉工况波动频繁所带来最佳反应温度区间(900-950℃)上下波动，致使所布置的喷枪并非时时在还原剂最佳反应温度区内的问题，实际脱销效率也就无法保证。At present, the SNCR process of the waste incineration industry is to open a hole in the front wall of the first vertical flue of the waste incineration boiler, and arrange one or more fixed spray guns to spray the reducing agent into the flue gas. The denitration efficiency of this method is generally very low. , Only at 30-50%, and the ammonia escape rate is high. Chinese patent CN201410593561 To solve this problem, multiple groups of spray guns are arranged at different heights and cross sections, and a certain group or group of spray guns are controlled by temperature feedback to the control system to overcome the shortcomings of the fixed spray gun out-of-stock system; however, this method also It does not fundamentally solve the problem that the optimal reaction temperature range (900-950°C) fluctuates due to frequent fluctuations in the operating conditions of the waste incineration boiler, resulting in the problem that the spray gun is not always in the optimal reaction temperature range of the reducing agent. Out-of-stock efficiency cannot be guaranteed.
目前，固定式喷枪都是呈水平状态安装在前墙上，喷枪的喷头从前墙的墙壁伸入炉膛烟道内进行喷射，由于喷枪呈水平安装状态，炉膛烟道中易出现无喷液的死角或是重叠喷入，加上垃圾焚烧锅炉横截面温度分布不均匀，很难使还原剂与烟气达到较好的混合效果，即使从理论上可以布置无限多的喷枪，但是系统将极其复杂，并且投资费用很高。At present, the fixed spray guns are installed horizontally on the front wall, and the nozzle of the spray gun extends from the wall of the front wall into the furnace flue for spraying. Due to the horizontal installation of the spray gun, there is a tendency for dead spots or no liquid spray in the furnace flue. Overlapping injection and the uneven temperature distribution of the cross section of the waste incineration boiler make it difficult to achieve a good mixing effect of the reducing agent and flue gas. Even if theoretically an infinite number of spray guns can be arranged, the system will be extremely complicated and investment High expense.
实用实新内容Practical and innovative content
为解决上述技术的缺点与不足，本实用实新提供一种垃圾焚烧发电厂炉内SNCR脱硝的喷射还原系统，喷枪呈垂直状态安装在锅炉顶部，喷枪的喷头从锅炉顶部伸入炉膛烟道内，喷枪的喷头在水平面上呈360°向炉内烟道四周喷射喷液，根据炉内工况的波动情况，所述喷枪在控制系统的控制下自动伸缩并使喷液定位在炉内最佳还原反应的温度区域，由于在水平面上呈360°向炉内四周喷射喷液，使还原剂在合适的温度窗口分布更均匀，提高截面覆盖率，减小无还原剂死角区，加强与烟气的混合效果，提高脱硝效率，减少氨逃逸，节约运行成本。In order to solve the shortcomings and deficiencies of the above technology, the utility model provides a spray reduction system for SNCR denitration in the furnace of a waste incineration power plant. The spray gun is installed vertically on the top of the boiler, and the nozzle of the spray gun extends from the top of the boiler into the furnace flue. The spray head of the spray gun sprays liquid on the horizontal surface at 360° around the flue in the furnace. According to the fluctuation of the working conditions in the furnace, the spray gun automatically expands and contracts under the control of the control system and positions the spray liquid in the furnace for optimal reduction In the reaction temperature area, the spray liquid is sprayed to the surroundings of the furnace at 360° on the horizontal surface, so that the reducing agent is more evenly distributed in the appropriate temperature window, the cross-sectional coverage is improved, the dead zone without reducing agent is reduced, and the The mixing effect improves the denitration efficiency, reduces ammonia slip, and saves operating costs.
本实用实新解决技术问题所提供方案是，一种垃圾焚烧发电厂炉内SNCR脱硝的喷射还原系统，包括除盐水供给系统、还原剂供给系统、冷却系统、控制系统以及喷枪，按照除盐水流动方向，除盐水供给系统依次包括除盐水存储罐、除盐水输送泵、混合分配系统；按照还原剂输送方向，还原剂供给系统依次包括还原剂存储罐、还原剂输送泵、混合分配系统；在所述控制系统的控制下，除盐水依次从除盐水存储罐、除盐水输送泵进入混合分配系统然后进入喷枪，还原剂依次从还原剂存储罐、还原剂输送泵进入混合分配系统然后进入喷枪；所述冷却系统对喷枪进行冷却；The solution provided by this practical solution to the technical problem is a jet reduction system for SNCR denitrification in a furnace of a waste incineration power plant, including a desalination water supply system, a reducing agent supply system, a cooling system, a control system, and a spray gun. In the direction, the desalination water supply system includes a desalination water storage tank, a desalination water delivery pump, and a mixed distribution system in sequence; according to the reducing agent delivery direction, the reducing agent supply system includes a reducing agent storage tank, a reducing agent delivery pump, and a mixing distribution system in turn; Under the control of the control system, the desalinated water sequentially enters the mixed distribution system from the desalinated water storage tank and the desalted water delivery pump and then enters the spray gun, and the reducing agent sequentially enters the mixed distribution system from the reducing agent storage tank and the reducing agent delivery pump and then enters the spray gun; The cooling system cools the spray gun;
其特征是，所述喷枪呈垂直状态安装在锅炉顶部，所述喷枪的喷头从锅炉顶部伸入炉膛烟道内，所述喷枪的喷头在水平面上呈360°向炉内烟道四周喷射喷液，根据炉内工况的波动情况，所述喷枪在控制系统的控制下自动伸缩并使喷液定位在炉内最佳还原反应的温度区域。The utility model is characterized in that the spray gun is installed on the top of the boiler in a vertical state, the spray head of the spray gun extends into the furnace flue from the top of the boiler, and the spray head of the spray gun sprays liquid around the flue in the furnace at 360° on the horizontal plane. According to the fluctuation of the working conditions in the furnace, the spray gun automatically expands and contracts under the control of the control system and positions the spray liquid in the temperature region of the optimal reduction reaction in the furnace.
优选方案，所述喷枪为一组或若干组。In a preferred solution, the spray gun is a group or groups.
优选方案，所述最佳反应区域的温度为900-950℃。In a preferred solution, the temperature of the optimal reaction zone is 900-950°C.
本实用实新的有益效果：一种垃圾焚烧发电厂炉内SNCR脱硝的喷射还原系统，包括除盐水供给系统、还原剂供给系统、冷却系统、控制系统以及喷枪，在所述控制系统的控制下，除盐水依次从除盐水存储罐、除盐水输送泵进入混合分配系统然后进入喷枪，还原剂依次从还原剂存储罐、还原剂输送泵进入混合分配系统然后进入喷枪；所述冷却系统对喷枪进行冷却；所述喷枪呈垂直状态安装在锅炉顶部，所述喷枪的喷头从锅炉顶部伸入炉膛烟道内，所述喷枪的喷头在水平面上呈360°向炉内烟道四周喷射喷液，根据炉内工况的波动情况，所述喷枪在控制系统的控制下自动伸缩并使喷液定位在炉内最佳还原反应的温度区域。可以保证SNCR脱硝反应始终在最佳温度窗口，加强了还原剂与烟气的混合效果，从而提高了脱硝效率，减少了氨逃逸，节约了运行成本。The utility model has beneficial effects: a spray reduction system for SNCR denitration in a furnace of a waste incineration power plant, including a desalination water supply system, a reducing agent supply system, a cooling system, a control system and a spray gun, under the control of the control system , The desalinated water from the desalinated water storage tank, desalinated water delivery pump into the mixing and distribution system and then into the spray gun, reducing agent from the reducing agent storage tank, reducing agent delivery pump into the mixing and distribution system and then into the spray gun; the cooling system for the spray gun Cooling; the spray gun is installed vertically on the top of the boiler, the nozzle of the spray gun extends from the top of the boiler into the furnace flue, and the nozzle of the spray gun sprays the liquid on the horizontal surface at 360° around the flue in the furnace, according to the furnace Under the fluctuation of internal working conditions, the spray gun automatically expands and contracts under the control of the control system and positions the spray liquid in the temperature zone of the optimal reduction reaction in the furnace. It can ensure that the SNCR denitration reaction is always at the optimal temperature window, which strengthens the mixing effect of reducing agent and flue gas, thereby improving the denitration efficiency, reducing ammonia escape, and saving operating costs.
附图说明BRIEF DESCRIPTION
图1为现有技术一个实施例的喷枪安装示意图。FIG. 1 is a schematic diagram of installation of a spray gun according to an embodiment of the prior art.
图2-图3为本实用实新第一个实施例的结构示意图。图2为本实用实新第一个实施例的喷枪安装示意图，图3为该实施例的系统布置示意图。2 to 3 are schematic structural diagrams of the first embodiment of the utility model. Fig. 2 is a schematic diagram of the installation of the spray gun in the first embodiment of the utility model, and Fig. 3 is a schematic diagram of the system arrangement of the embodiment.
图中:In the picture:
1.1炉膛，1.1 Furnace,
1.21第一垂直烟道，1.22第二垂直烟道，1.23第三垂直烟道，1.21 first vertical flue, 1.22 second vertical flue, 1.23 third vertical flue,
1.21A第一垂直烟道前墙，1.21B第一垂直烟道锅炉顶，1.21C最佳反应区域，1.21A first vertical flue front wall, 1.21B first vertical flue boiler roof, 1.21C optimal reaction area,
2、2.1、2.2、2.3喷枪。2. 2.1, 2.2, 2.3 spray guns.
具体实施方式detailed description
图1为现有技术一个实施例的喷枪安装示意图。图中显示，现有技术中，垃圾焚烧行业SNCR工艺是在垃圾焚烧锅炉第一垂直烟道1.21的前墙1.21A开孔，布置固定式喷枪2.1、2.2、2.3，向烟气中喷入还原剂，该方式的脱硝效率一般都很低，只有在30-50％，而且氨逃逸率高。FIG. 1 is a schematic diagram of installation of a spray gun according to an embodiment of the prior art. The figure shows that in the prior art, the SNCR process of the waste incineration industry is to open a hole in the front wall 1.21A of the first vertical flue 1.21 of the waste incineration boiler, and arrange fixed spray guns 2.1, 2.2, 2.3 to inject the reduction into the flue gas Agent, the denitration efficiency of this method is generally very low, only 30-50%, and the ammonia escape rate is high.
本例中，由于固定式喷枪2.1、2.2、2.3是呈水平状态安装在前墙1.21A上，喷枪的喷头从前墙1.21A的墙壁伸入第一垂直烟道1.21内进行喷射，由于喷枪呈水平安装状态，炉膛烟道中易出现无喷液的死角或是重叠喷入，加上垃圾焚烧锅炉横截面温度分布不均匀，很难使还原剂与烟气达到较好的混合效果，即使从理论上可以布置无限多的喷枪，但是系统将极其复杂，并且投资费用很高。In this example, since the fixed spray guns 2.1, 2.2, and 2.3 are installed horizontally on the front wall 1.21A, the spray head of the spray gun extends from the wall of the front wall 1.21A into the first vertical flue 1.21 for spraying, because the spray gun is horizontal In the installation state, there is no dead angle or overlapping injection in the flue of the furnace, and the temperature distribution of the cross section of the garbage incinerator is uneven. It is difficult to achieve a good mixing effect of the reducing agent and the flue gas, even in theory An unlimited number of spray guns can be arranged, but the system will be extremely complicated and the investment cost is high.
图2-图3为本实用实新第一个实施例的结构示意图。图2为本实用实新第一个实施例的喷枪安装示意图，图3为该实施例的系统布置示意图。图3显示，本例中，一种垃圾焚烧发电厂炉内SNCR脱硝的喷射还原系统，包括除盐水供给系统、还原剂供给系统、冷却系统、控制系统以及喷枪，按照除盐水流动方向，除盐水供给系统依次包括除盐水存储罐、除盐水输送泵、混合分配系统；按照还原剂输送方向，还原剂供给系统依次包括还原剂存储罐、还原剂输送泵、混合分配系统；在所述控制系统的控制下，除盐水依次从除盐水存储罐、除盐水输送泵进入混合分配系统然后进入喷枪，还原剂依次从还原剂存储罐、还原剂输送泵进入混合分配系统然后进入喷枪；所述冷却系统对喷枪进行冷却。2 to 3 are schematic structural diagrams of the first embodiment of the utility model. Fig. 2 is a schematic diagram of the installation of the spray gun in the first embodiment of the utility model, and Fig. 3 is a schematic diagram of the system arrangement of the embodiment. Figure 3 shows that in this example, a SNCR denitrification spray reduction system in a waste incineration power plant furnace includes a desalination water supply system, a reducing agent supply system, a cooling system, a control system, and a spray gun. According to the desalination water flow direction, the desalination water The supply system includes a desalinated water storage tank, a desalinated water delivery pump, and a mixed distribution system in sequence; according to the reducing agent delivery direction, the reducing agent supply system includes a reducing agent storage tank, a reducing agent delivery pump, and a mixed distribution system in sequence; in the control system Under control, the desalinated water sequentially enters the mixing and distribution system from the desalinated water storage tank and the desalinated water delivery pump and then enters the spray gun, and the reducing agent sequentially enters the mixing and distribution system from the reducing agent storage tank and the reducing agent delivery pump and then enters the spray gun; Spray gun for cooling.
图2显示，喷枪2呈垂直状态安装在锅炉顶部1.21B，喷枪2的喷头从锅炉顶部1.21B伸入第一垂直烟道1.21内，喷枪2的喷头在水平面上呈360°向炉内烟道四周喷射喷液，根据炉内工况的波动情况，喷枪2在控制系统的控制下自动伸缩并使喷液定位在炉内最佳还原反应的温度区域。Figure 2 shows that the spray gun 2 is installed vertically on the top of the boiler 1.21B. The spray head of the spray gun 2 extends from the top of the boiler 1.21B into the first vertical flue 1.21. The spray head of the spray gun 2 is 360° toward the flue in the furnace on the horizontal plane The spray liquid is sprayed all around. According to the fluctuation of the working conditions in the furnace, the spray gun 2 automatically expands and contracts under the control of the control system and positions the spray liquid in the temperature region of the optimal reduction reaction in the furnace.
本实用实新提示，本例中，所述喷枪2可以为一组为若干组。This practical new hint, in this example, the spray gun 2 can be a group of several groups.
本实用实新提示，最佳反应区域的温度为900-950℃。This practical new hint, the temperature of the best reaction area is 900-950 ℃.

Claims (3)

  1. 一种垃圾焚烧发电厂炉内SNCR脱硝的喷射还原系统，包括除盐水供给系统、还原剂供给系统、冷却系统、控制系统以及喷枪，按照除盐水流动方向，除盐水供给系统依次包括除盐水存储罐、除盐水输送泵、混合分配系统；按照还原剂输送方向，还原剂供给系统依次包括还原剂存储罐、还原剂输送泵、混合分配系统；在所述控制系统的控制下，除盐水依次从除盐水存储罐、除盐水输送泵进入混合分配系统然后进入喷枪，还原剂依次从还原剂存储罐、还原剂输送泵进入混合分配系统然后进入喷枪；所述冷却系统对喷枪进行冷却；A spray reduction system for SNCR denitrification in a furnace of a waste incineration power plant includes a desalination water supply system, a reducing agent supply system, a cooling system, a control system, and a spray gun. According to the desalination water flow direction, the desalination water supply system sequentially includes a desalination water storage tank 1. Desalination water delivery pump and mixed distribution system; in accordance with the reducing agent delivery direction, the reducing agent supply system includes a reducing agent storage tank, a reducing agent delivery pump, and a mixing distribution system in turn; under the control of the control system, the desalinated water is sequentially removed from the The brine storage tank and the desalinated water delivery pump enter the mixing and distribution system and then into the spray gun, and the reducing agent sequentially enters the reducing agent storage tank and the reducing agent delivery pump into the mixing and distribution system and then into the spray gun; the cooling system cools the spray gun;
    其特征是，所述喷枪呈垂直状态安装在锅炉顶部，所述喷枪的喷头从锅炉顶部伸入炉膛烟道内，所述喷枪的喷头在水平面上呈360°向炉内烟道四周喷射喷液，根据炉内工况的波动情况，所述喷枪在控制系统的控制下自动伸缩并使喷液定位在炉内最佳还原反应的温度区域。The utility model is characterized in that the spray gun is installed on the top of the boiler in a vertical state, the spray head of the spray gun extends into the furnace flue from the top of the boiler, and the spray head of the spray gun sprays liquid around the flue in the furnace at 360° on the horizontal plane. According to the fluctuation of the working conditions in the furnace, the spray gun automatically expands and contracts under the control of the control system and positions the spray liquid in the temperature region of the optimal reduction reaction in the furnace.
  2. 根据权利要求1所述的一种垃圾焚烧发电厂炉内SNCR脱硝的喷射还原系统，其特征是，所述喷枪为一组或若干组。A spray reduction system for SNCR denitration in a furnace of a waste incineration power plant according to claim 1, wherein the spray gun is a group or groups.
  3. 根据权利要求1所述的一种垃圾焚烧发电厂炉内SNCR脱硝的喷射还原系统，其特征是，所述最佳反应区域的温度为900-950℃。The injection reduction system for SNCR denitration in a furnace of a waste incineration power plant according to claim 1, wherein the temperature of the optimal reaction zone is 900-950°C.
PCT/CN2018/120753 2018-12-12 2018-12-12 Spray reduction system for sncr denitration in furnace of waste incineration power plant WO2020118590A1 (en)

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EP0989365A1 (en) * 1998-09-23 2000-03-29 Asea Brown Boveri AG Process for flue gases denitration
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CN204051973U (en) * 2014-07-29 2014-12-31 北京洛卡环保技术有限公司 A kind of injector for SNCR denitration system
CN104399360A (en) * 2014-11-14 2015-03-11 华能国际电力股份有限公司 NOx and mercury combined removal process and device based on combination of SNCR-SCR
CN105268300A (en) * 2015-11-11 2016-01-27 中国华能集团公司 Joint mercury removing method and device based on SNCR
CN105289233A (en) * 2015-11-11 2016-02-03 中国华能集团公司 Coal-fired boiler SNCR and SCR combined denitration system and method thereof
CN205783064U (en) * 2016-05-27 2016-12-07 扬州高立达科技产业有限公司 Novel green Intelligent heating stove

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989365A1 (en) * 1998-09-23 2000-03-29 Asea Brown Boveri AG Process for flue gases denitration
CN103657386A (en) * 2013-10-16 2014-03-26 广东清华中邦热能科技有限公司 fully-automatic regulating SNCR (selective non-catalytic reduction) denitrification device
CN103691293A (en) * 2014-01-13 2014-04-02 广东清华中邦热能科技有限公司 Novel SNCR (selective non-catalytic reduction) and SCR (selective catalytic reduction) hybrid denitrification system
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CN104399360A (en) * 2014-11-14 2015-03-11 华能国际电力股份有限公司 NOx and mercury combined removal process and device based on combination of SNCR-SCR
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CN105289233A (en) * 2015-11-11 2016-02-03 中国华能集团公司 Coal-fired boiler SNCR and SCR combined denitration system and method thereof
CN205783064U (en) * 2016-05-27 2016-12-07 扬州高立达科技产业有限公司 Novel green Intelligent heating stove

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