CN209885558U - A biomass boiler denitrification device - Google Patents

Abstract

The utility model discloses a denitrification device for a biomass boiler, which comprises a base, a denitration box, an air inlet pipe, a flue gas filtering mechanism, a denitration tank, a temperature sensor, a protective cover, a control module, a liquid discharge pipe, a liquid inlet pipe and a stirring shaft. A denitration box is fixedly installed on the upper side of the base, and an air intake pipe is arranged on the lower right side of the denitration box. The utility model can realize the adsorption of the dust in the flue gas through the flue gas filter mechanism arranged on the left side of the air inlet pipe, prevent the dust from entering the denitration tank, waste the denitration liquid, cause the waste of resources and increase the cost, and the provided temperature sensor can realize the The temperature in the denitration tank is detected, and the heating tube can be used to heat the denitration solution, so that the denitration solution can fully react and improve the efficiency of denitration. The first denitration layer and the second denitration layer can further improve the efficiency of denitration and reduce the cost of denitration.

Description

A biomass boiler denitrification device

technical field

The utility model belongs to the technical field of biomass boiler denitration, in particular to a biomass boiler denitration device.

Background technique

my country is a big energy-consuming country. Due to the large-scale use of fossil fuels, energy shortages and environmental degradation are caused. Therefore, sustainable, low-pollution, and low-energy consumption new energy sources are imminent. As a sustainable and low-polluting new fuel, biomass energy has occupied an important position in boiler fuel. By 2010, the installed capacity of biomass power generation in China will exceed 3000MW. Biomass is a renewable resource with large output, which can achieve "low emission" of carbon dioxide and meet the requirements of a low-carbon economy. Compared with pulverized coal, biomass contains almost no sulfur, so the SO2 emission in the flue gas is also lower than the highest environmental protection requirements, but the nitrogen content of biomass fuel is 1.2%-2.5%, and the NOx in the flue gas after boiler combustion The emission concentration is generally 250 ~ 350mg/Nm3. Therefore, when using biomass as fuel, the boiler environmental protection measures do not need to worry about pollution, but it is necessary to control the pollution caused by NOx in the flue gas. With the severe environmental protection in my country, most biomass boilers are implemented in accordance with the environmental protection requirements of boiler thermal power plants, but it is difficult to achieve <100mg/Nm3 through traditional denitrification processes, and even <50mg/Nm3 of ultra-clean emissions in key areas .

The current denitration equipment is not intelligent enough, the denitration process is quite complicated, the denitration efficiency is generally low, and the dust removal efficiency is not high, which not only increases the cost, but also wastes resources. Simplicity, there are many problems in the implementation process, and the intelligent operation level is not high, resulting in an increase in the cost of denitrification.

Utility model content

In order to solve the problems raised in the above background art. The utility model provides a biomass boiler denitrification device, which has the advantages of simple structure, convenient use, high denitration efficiency, cost reduction and resource saving.

In order to achieve the above purpose, the utility model provides the following technical solutions: a biomass boiler denitrification device, comprising a base, a denitration box, an air intake pipe, a flue gas filter mechanism, a denitration tank, a temperature sensor, a protective cover, a control module, and a drain pipe , a liquid inlet pipe, a stirring shaft and a heating pipe, a denitration box is fixedly installed on the upper side of the base, an intake pipe is arranged on the lower right side of the denitration box, and a flue gas filter mechanism is fixedly connected to the left side of the intake pipe. An ash suction plate is arranged inside the flue gas filter mechanism. A breathable membrane is fixedly installed on the left side of the ash suction plate. A control module is installed on the lower side, a drain pipe is fixedly connected to the lower left side of the denitrification tank, a liquid inlet pipe is fixedly installed on the upper left side of the denitration tank, a stirring shaft is arranged inside the denitration tank, and the top of the stirring shaft is installed The groove is fixedly installed on the lower side of the rotating disk, and a connecting hole is opened in the middle of the rotating disk. The connecting hole is rotatably connected with the bottom end of the rotating shaft. The left and right sides of the rotating shaft are provided with separation plates, and the separation plates are provided with a plurality of ventilation holes, a first denitration layer is fixedly installed on the upper side of the separation plate, a second denitration layer is fixedly installed on the upper side of the first denitration layer, and a gas collecting bin is opened on the upper side of the second denitration layer, so A left air outlet pipe is provided on the left side of the gas collecting bin, and a right air outlet pipe is provided on the right side of the gas collecting bin.

Preferably, a denitration solution mixed with a denitration agent is placed inside the denitration tank, and the denitration agent is liquid ammonia, ammonia gas or urea solution.

Preferably, a protective cover is provided outside the temperature sensor.

Preferably, the control module is fixedly installed inside the base, an operation panel and a PLC controller are arranged inside the control module, and the model of the PLC controller is AH-500.

Preferably, the number of the stirring shafts is three, and heating pipes are arranged inside the stirring shafts.

Preferably, the rotating shaft is in a transmission connection with a driving motor through an output shaft, and a motor protective cover is provided outside the driving motor.

Preferably, both the first denitration layer and the second denitration layer are provided with a denitration agent layer, and both the first denitration layer and the second denitration layer are breathable layers.

Compared with the prior art, the beneficial effects of the present utility model are:

1. The present utility model can realize the adsorption of dust in the flue gas through the flue gas filter mechanism arranged on the left side of the air intake pipe, prevent the dust from entering the denitration tank, waste the denitration liquid, cause waste of resources, and increase the cost. The temperature in the denitrification tank can be detected, and the denitrification liquid can be heated through the set heating pipe, so that the denitration liquid can be fully reacted and the efficiency of denitration can be improved.

2. The stirring shaft provided by the utility model can realize uniform stirring of the denitrification liquid, improve the efficiency of denitration, and the set first denitration layer and the second denitration layer can further improve the efficiency of denitration and reduce the cost of denitration. Both the trachea and the right exit trachea can be used for exhalation.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present utility model;

Fig. 2 is the partial structure schematic diagram of the smoke filter mechanism of the present invention;

FIG. 3 is a schematic diagram of the bottom structure of the rotary disk of the present invention.

In the picture: 1. Base, 2. Denitrification box, 3. Intake pipe, 4. Flue gas filter mechanism, 401, Ash suction plate, 402, Breathable membrane, 5. Denitrification tank, 6. Temperature sensor, 7. Protective cover, 8. Control module, 9, Drain pipe, 10, Liquid inlet pipe, 11, Stirring shaft, 12, Heating pipe, 13, Rotating plate, 131, Installation slot, 132, Connection hole, 14, Rotating shaft, 15, Drive motor , 16, the separation plate, 17, the first denitration layer, 18, the second denitration layer, 19, the gas collection bin, 20, the left air outlet, 21, the right air outlet.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

1-3, the present utility model provides the following technical solutions: a biomass boiler denitrification device, comprising a base 1, a denitration box 2, an air intake pipe 3, a flue gas filter mechanism 4, a denitration tank 5, a temperature sensor 6, a protection The cover 7, the control module 8, the drain pipe 9, the liquid inlet pipe 10, the stirring shaft 11 and the heating pipe 12, the denitration box 2 is fixedly installed on the upper side of the base 1, and the air inlet pipe 3 is arranged on the lower right side of the denitration box 2. 3. A flue gas filter mechanism 4 is fixedly connected on the left side, which can realize the treatment of dust in the flue gas and improve the efficiency of denitration. The flue gas filter mechanism 4 is provided with an ash suction plate 401, and the left side of the ash suction plate 401 is fixedly installed with a The gas permeable membrane 402, the end of the air inlet pipe 3 leads to the denitration tank 5, the temperature sensor 6 is fixedly installed in the middle of the bottom of the denitration tank 5, which can detect the temperature of the denitrification liquid. A drain pipe 9 is connected, a liquid inlet pipe 10 is fixedly installed on the upper left side of the denitration tank 5, and a stirring shaft 11 is arranged inside the denitration tank 5, which can realize the uniform stirring of the denitrification liquid and improve the denitration rate. The top of the stirring shaft 11 passes through the installation groove 131 is fixedly installed on the lower side of the rotating disk 13, a connecting hole 132 is opened in the middle of the rotating disk 13, and the connecting hole 132 is rotatably connected with the bottom end of the rotating shaft 14. The left and right sides of the rotating shaft 14 are provided with separation plates 16, and the separation plate 16 is provided with There are a plurality of ventilation holes, a first denitration layer 17 is fixedly installed on the upper side of the separation plate 16, and a second denitration layer 18 is fixedly installed on the upper side of the first denitration layer 17 to further improve the efficiency of denitration. The upper side of the second denitration layer 18 is provided with The gas collecting chamber 19 is provided with a left air outlet pipe 20 on the left side of the gas collecting chamber 19 and a right air outlet pipe 21 on the right side of the gas collecting chamber 19 .

Further, a denitration liquid mixed with a denitration agent is placed inside the denitration tank 5, which can be denitrified, and the denitration agent is liquid ammonia, ammonia gas or urea solution.

Further, a protective cover 7 is provided outside the temperature sensor 6 for protecting the temperature sensor 6 .

Further, the control module 8 is fixedly installed inside the base 1 , an operation panel and a PLC controller are arranged inside the control module 8 , and the model of the PLC controller is AH-500.

Further, the number of stirring shafts 11 is three, and heating pipes 12 are arranged inside the stirring shafts 11, which can realize the heating treatment of the denitrification liquid and improve the denitration rate.

Further, the rotating shaft 14 is in a transmission connection with the driving motor 15 through the output shaft, and a motor protective cover is provided outside the driving motor 15 .

Further, both the first denitration layer 17 and the second denitration layer 18 are provided with a denitration agent layer, and the first denitration layer 17 and the second denitration layer 18 are both breathable layers, which can improve the efficiency of denitration.

The working principle and use process of the utility model: when the utility model is in use, the flue gas is passed into the flue gas filtering mechanism 4 through the provided air intake pipe 3 for filtering treatment, so as to realize the adsorption of dust in the flue gas and prevent the Dust affects subsequent denitrification, prevents dust from entering denitration tank 5, wastes denitrification liquid, causes waste of resources, and increases cost. The temperature sensor 6 can be used to detect the temperature in denitration tank 5, and the heating pipe 12 can be used to realize denitrification. The denitrification liquid is heated to make the denitration liquid react sufficiently and improve the efficiency of denitration. The control module 8 can be used to control the process of denitration. The drive motor 15 can provide power to the rotating disk 13, which is arranged on the lower side of the rotating disk 13. The stirring shaft 11 can realize the uniform stirring of the denitrification solution and improve the denitration efficiency. The first denitration layer 17 and the second denitration layer 18 can further improve the denitration efficiency and reduce the denitration cost.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. The utility model provides a biomass boiler denitrification facility, includes base (1), denitration case (2), intake pipe (3), flue gas filter mechanism (4), denitration pond (5), temperature sensor (6), safety cover (7), control module (8), fluid-discharge tube (9), feed liquor pipe (10), (mixing) shaft (11) and heating tube (12), its characterized in that: the denitration device is characterized in that a denitration box (2) is fixedly mounted on the upper side of a base (1), an air inlet pipe (3) is arranged on the lower right side of the denitration box (2), a flue gas filtering mechanism (4) is fixedly connected to the left side of the air inlet pipe (3), an ash suction plate (401) is arranged inside the flue gas filtering mechanism (4), a breathable film (402) is fixedly mounted on the left side of the ash suction plate (401), the tail end of the air inlet pipe (3) is introduced into a denitration tank (5), a temperature sensor (6) is fixedly mounted in the middle of the bottom of the denitration tank (5), a control module (8) is mounted on the lower side of the temperature sensor (6), a liquid discharge pipe (9) is fixedly connected to the lower left side of the denitration tank (5), a liquid inlet pipe (10) is fixedly mounted on the upper left side of the denitration tank (5), a stirring shaft (11) is arranged, connecting hole (132) have been seted up in the middle of rotary disk (13), connecting hole (132) are rotated with pivot (14) bottom and are connected, pivot (14) the left and right sides all is provided with separator plate (16), a plurality of bleeder vents have been seted up on separator plate (16), separator plate (16) upside fixed mounting has first denitration layer (17), first denitration layer (17) upside fixed mounting has second denitration layer (18), gas collection storehouse (19) have been seted up to second denitration layer (18) upside, gas collection storehouse (19) left side is provided with left outlet duct (20), gas collection storehouse (19) right side is provided with right outlet duct (21).

2. The denitration device for the biomass boiler according to claim 1, characterized in that: denitration liquid formed by mixing denitration agents is placed in the denitration tank (5), and the denitration agents are liquid ammonia, ammonia gas or urea solution.

3. The denitration device for the biomass boiler according to claim 1, characterized in that: and a protective cover (7) is arranged on the outer side of the temperature sensor (6).

4. The denitration device for the biomass boiler according to claim 1, characterized in that: control module (8) fixed mounting is inside base (1), inside operating panel and the PLC controller of being provided with of control module (8), the model of PLC controller is AH-500.

5. The denitration device for the biomass boiler according to claim 1, characterized in that: the number of the stirring shafts (11) is three, and heating tubes (12) are arranged in the stirring shafts (11).

6. The denitration device for the biomass boiler according to claim 1, characterized in that: the rotating shaft (14) is in transmission connection with the driving motor (15) through an output shaft, and a motor protection cover is arranged outside the driving motor (15).

7. The denitration device for the biomass boiler according to claim 1, characterized in that: the denitration agent layers are arranged inside the first denitration layer (17) and the second denitration layer (18), and the first denitration layer (17) and the second denitration layer (18) are breathable layers.

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