Novel denitration device

Abstract

The utility model relates to the technical field of non-ferrous metal metallurgy, and discloses a novel denitration device which comprises a box body, a fixing plate is fixedly connected to the back face of the box body, and a hinge is fixedly connected to one side face of the box body. The flue gas denitration device has the following advantages and effects that the spiral conveying mechanism, the unloading mechanism and the Roots blower are arranged, the spiral conveying mechanism is used for conveying solid urea, and then the unloading mechanism is used for spraying the solid urea out through the Roots blower, so that a denitration medicament is fully mixed with flue gas, and the denitration medicament is sprayed into the flue gas to react with NOX so as to achieve the denitration purpose; the products are H2O, N2 and CO2, a novel solid state denitration mode is adopted, solid urea is sprayed into a hearth through a Roots blower, and the denitration effect is greatly improved; only limited field space is needed, so that the size is greatly reduced; and secondly, the cost of the urea is lower than that of other denitration agents, so that the effects of low cost, no need of newly adding large equipment and high denitration efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of nonferrous metal smelting, in particular to a novel denitration device. Background Art

[0002] Selective non-catalytic reduction technology, referred to as SNCR, is a clean denitrification technology that does not use a catalyst and directly sprays nitrogen-based reducing agents (such as ammonia water, urea solution, etc.) into the furnace within a temperature range of 850°C to 1050°C to selectively reduce and remove NOx in the flue gas to generate nitrogen and water.

[0003] According to Chinese patent number CN217068349U, a denitration device is provided, including a storage bin, a mixer, an air distribution component and a urea preparation tank; a first feed port is provided at the top of the storage bin, the first feed port is connected to a butterfly valve, and a first discharge port is provided at the bottom of the storage bin; a second feed port is provided in the mixer, and the second feed port is connected to the first discharge port; a second discharge port is provided in the mixer, and the second discharge port is connected to the port of the feed pipe, and the port of the feed pipe away from the second discharge port is connected to the third feed port on the urea preparation tank; the air distribution device includes an air bag and an air inlet pipe and an air outlet pipe connected to the air bag, the air inlet pipe is used to input compressed gas into the air bag, and the air outlet pipe is connected to the mixer, and is used to input the compressed gas in the air bag into the mixer. The utility model can effectively prevent water vapor from entering the storage bin, the mixer and the feed pipe, and prevent urea particles from getting damp and hardening.

[0004] The above patent has the effect of preventing water vapor from entering the storage bin, mixer and feed pipe, and preventing urea particles from getting damp and hardening, but the denitrification agent storage tank may be large in size and occupy a large area. At the same time, the denitrification agent is a liquid and has a relatively low efficiency. Utility Model Content

[0005] The utility model aims to provide a novel denitration device, which has the effects of low cost, no need for new large-scale equipment and high denitration efficiency.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a new denitrification device, including a box body, a feed port is opened on the upper surface of the box body, a feed hopper is fixedly connected above the feed port, a spiral conveying mechanism is arranged below the feed port, one end of the spiral conveying mechanism is fixedly connected to a wire mesh, a urea storage tank is fixedly connected below the wire mesh, a connecting pipe is fixedly connected below the urea storage tank, a discharge mechanism is fixedly connected to the bottom of the connecting pipe, a spray pipe is fixedly connected to the bottom of the discharge mechanism, an air supply pipe is fixedly connected to one side of the spray pipe, a discharge pipe is fixedly connected to the other side of the spray pipe, and a Roots blower is fixedly connected to one end of the air supply pipe.

[0007] By adopting the above technical scheme, through the arrangement of a screw conveying mechanism, a discharge mechanism and a Roots blower, the solid urea is transported by the screw conveying mechanism, and then the solid urea is sprayed out through the Roots blower by the discharge mechanism, so that the denitrification agent is fully mixed with the flue gas, and it is sprayed into the flue gas to react with NOX to achieve the purpose of denitrification, and its products are HO, N, and CO. By adopting a new solid-state denitrification method, the solid urea is sprayed into the furnace by the Roots blower, and the denitrification effect is greatly improved; and only limited site space is required, and the volume is greatly reduced; secondly, the cost of urea is lower than that of other denitrification agents, achieving the effects of low cost, no need for new large-scale equipment and high denitrification efficiency.

[0008] The utility model is further configured as follows: the spiral conveying mechanism comprises a conveying motor, the output end of the conveying motor is fixedly connected to a conveying shaft, the outer surface of the conveying shaft is fixedly connected to a conveying roller, and the outer surface of the conveying roller is fixedly connected to a spiral plate.

[0009] By adopting the above technical solution, the spiral conveying mechanism can smoothly deliver the material into the urea storage tank, preventing urea blockage and reducing the denitrification efficiency.

[0010] The utility model is further configured as follows: the unloading mechanism comprises a shell, a side surface of the shell is fixedly connected to a driving motor, an output end of the driving motor is fixedly connected to a rotating shaft, and an outer surface of the rotating shaft is fixedly connected to a rotor.

[0011] By adopting the above technical solution, the setting of the driving motor can increase or decrease the denitrification agent to achieve the effect of controlling the dosage of the agent to save costs.

[0012] The utility model is further configured as follows: a first valve is fixedly connected to an outer surface of the connecting pipe, and a second valve is fixedly connected to an outer surface of the air supply pipe.

[0013] By adopting the above technical solution, the first valve and the second valve are both solenoid valves, which can control the opening and closing of the pipeline and save manpower.

[0014] The utility model is further configured as follows: a fixing plate is fixedly connected to the back of the box, and a hinge is fixedly connected to one side of the box.

[0015] By adopting the above technical solution, the setting of the fixing plate can fix the position of the conveying motor, preventing the motor from loosening and causing damage to the conveying mechanism.

[0016] The utility model is further configured as follows: the outer surface of the hinge is fixedly connected to the box door, and the outer surface of the box door is fixedly connected to the handle.

[0017] By adopting the above technical solution, the setting of the box door can prevent impurities in the air from entering the urea storage tank and contaminating the denitrification agent, and the setting of the handle can open and close the box door, saving manpower.

[0018] The beneficial effects of the utility model are as follows: by arranging a spiral conveying mechanism, a discharging mechanism and a Roots blower, the spiral conveying mechanism is used to transport solid urea, and then the discharging mechanism is used to spray the solid urea out through the Roots blower, so that the denitrification agent is fully mixed with the flue gas, and the denitrification agent is sprayed into the flue gas to react with NOX to achieve the purpose of denitrification, and its products are H2O, N2, and CO2. A new solid-state denitrification method is adopted, and the Roots blower is used to spray solid urea into the furnace, so that the denitrification effect is greatly improved; and only limited site space is required, and the volume is greatly reduced; secondly, the cost of urea is lower than that of other denitrification agents, achieving the effects of low cost, no need for new large-scale equipment and high denitrification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic diagram of the shaft side structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0022] Figure 3 for Figure 2 The structural diagram at A in the middle;

[0023] Figure 4 It is a rear view structural schematic diagram of the utility model.

[0024] In the figure, 1, box body; 2, feed inlet; 3, feed hopper; 4, screw conveying mechanism; 5, wire mesh; 6, urea storage tank; 7, connecting pipe; 8, unloading mechanism; 9, spray pipe; 10, air supply pipe; 11, discharge pipe; 12, Roots blower; 13, first valve; 14, second valve; 15, fixing plate; 16, hinge; 17, box door; 18, handle; 401, conveying motor; 402, conveying shaft; 403, conveying roller; 404, spiral plate; 801, housing; 802, driving motor; 803, rotating shaft; 804, rotor. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Reference Figure 1-4 A novel denitration device comprises a box body 1, a fixing plate 15 is fixedly connected to the back of the box body 1, a hinge 16 is fixedly connected to one side of the box body 1, the setting of the fixing plate can fix the position of the conveying motor to prevent the motor from loosening and damaging the conveying mechanism, a box door 17 is fixedly connected to the outer surface of the hinge 16, a handle 18 is fixedly connected to the outer surface of the box door 17, the setting of the box door can prevent impurities in the air from entering the urea storage tank and polluting the denitration agent, the setting of the handle can open and close the box door, saving manpower, a feed port 2 is provided on the upper surface of the box body 1, a feed hopper 3 is fixedly connected above the feed port 2, a screw conveying mechanism 4 is provided below the feed port 3, the screw conveying mechanism 4 comprises a conveying motor 401, a conveying shaft 402 is fixedly connected to the output end of the conveying motor 401, a conveying roller 403 is fixedly connected to the outer surface of the conveying shaft 402, a spiral plate 404 is fixedly connected to the outer surface of the conveying roller 403, the screw conveying mechanism can smoothly deliver the material into the urea storage tank to prevent urea from being blocked and reducing the denitration efficiency, One end of the spiral conveying mechanism 4 is fixedly connected to a wire mesh 5, a urea storage tank 6 is fixedly connected to the lower part of the wire mesh 5, a connecting pipe 7 is fixedly connected to the lower part of the urea storage tank 6, a first valve 13 is fixedly connected to the outer surface of the connecting pipe 7, a second valve 14 is fixedly connected to the outer surface of the air supply pipe 10, the first valve and the second valve are solenoid valves, which can control the switch of the pipeline to save manpower, a discharge mechanism 8 is fixedly connected to the bottom of the connecting pipe 7, the discharge mechanism 8 includes a shell 801, a driving motor 802 is fixedly connected to one side of the shell 801, a rotating shaft 803 is fixedly connected to the output end of the driving motor 802, a rotor 804 is fixedly connected to the outer surface of the rotating shaft 803, and the setting of the driving motor can increase or decrease the denitrification agent to achieve the effect of controlling the dosage of the drug to save costs, a spray pipe 9 is fixedly connected to the bottom of the discharging mechanism 8, a side of the spray pipe 9 is fixedly connected to the air supply pipe 10, and the other side of the spray pipe 9 is fixedly connected to the discharge pipe 11, and a Roots blower 12 is fixedly connected to one end of the air supply pipe 10.

[0027] In the utility model, the spiral conveying mechanism 4, the unloading mechanism 8 and the Roots blower 12 are arranged, the solid urea is transported by the spiral conveying mechanism 4, and then the solid urea is sprayed out through the Roots blower 12 by the unloading mechanism 8, so that the denitrification agent is fully mixed with the flue gas, and it is sprayed into the flue gas to react with NOX to achieve the purpose of denitrification, and its products are H2O, N2, and CO2. A new solid denitrification method is adopted, and the solid urea is sprayed into the furnace by the Roots blower 12, and the denitrification effect is greatly improved; and only limited site space is required, and the volume is greatly reduced; secondly, the cost of urea is lower than that of other denitrification agents, achieving the effect of low cost, no need for new large-scale equipment and high denitrification efficiency.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel denitration device, comprising a housing (1), characterized in that: The upper surface of the box body (1) is provided with a feed port (2), a feed hopper (3) is fixedly connected above the feed port (2), a screw conveying mechanism (4) is arranged below the feed port (2), one end of the screw conveying mechanism (4) is fixedly connected to a wire mesh (5), a urea storage tank (6) is fixedly connected below the wire mesh (5), a connecting pipe (7) is fixedly connected below the urea storage tank (6), a discharge mechanism (8) is fixedly connected to the bottom of the connecting pipe (7), a spray pipe (9) is fixedly connected to the bottom of the discharge mechanism (8), a blower pipe (10) is fixedly connected to one side of the spray pipe (9), a discharge pipe (11) is fixedly connected to the other side of the spray pipe (9), and a Roots blower (12) is fixedly connected to one end of the blower pipe (10).

2. A novel denitration device according to claim 1, characterized in that: The screw conveying mechanism (4) comprises a conveying motor (401), the output end of the conveying motor (401) is fixedly connected to a conveying shaft (402), the outer surface of the conveying shaft (402) is fixedly connected to a conveying roller (403), and the outer surface of the conveying roller (403) is fixedly connected to a spiral plate (404).

3. A novel denitration device according to claim 1, characterized in that: The unloading mechanism (8) comprises a housing (801), a side surface of the housing (801) is fixedly connected to a driving motor (802), an output end of the driving motor (802) is fixedly connected to a rotating shaft (803), and an outer surface of the rotating shaft (803) is fixedly connected to a rotor (804).

4. A novel denitration device according to claim 1, characterized in that: A first valve (13) is fixedly connected to the outer surface of the connecting pipe (7), and a second valve (14) is fixedly connected to the outer surface of the air supply pipe (10).

5. A novel denitration device according to claim 1, characterized in that: A fixing plate (15) is fixedly connected to the back of the box body (1), and a hinge (16) is fixedly connected to one side of the box body (1).

6. A novel denitration device according to claim 5, characterized in that: The outer surface of the hinge (16) is fixedly connected to a box door (17), and the outer surface of the box door (17) is fixedly connected to a handle (18).

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