Lime shaft kiln denitration device

Abstract

The utility model discloses a denitration device for a lime shaft kiln, which structurally comprises a main body unit and a denitration unit, the main body unit comprises a tank body, a filter plate and a shunt pipe are arranged in the tank body, and a spray head is mounted on the shunt pipe; the supporting unit comprises a water storage tank and a medicament tank, a top cover is arranged on the water storage tank and the medicament tank, and a fixing frame is detachably connected to the top cover through bolts. When the device is used, flue gas enters the fixed box through the gas inlet, the temperature of the flue gas is sensed through the temperature sensor, and when the temperature of the flue gas is too high, cold water in the water storage tank is pumped out through the first water pump and conveyed into the snake-shaped copper pipe through the water conveying pipe, so that heat in the flue gas is taken away, and the flue gas is cooled; circulating cold water enters the water storage tank through the drainage pipe to circulate, the cooled flue gas is guided into the tank body to be filtered and denitrated, cooling is conducted in a cold water circulation heat exchange mode, heat in the flue gas can be rapidly absorbed, the temperature of the flue gas is reduced, and the situation that a filter screen is burnt or a spray head structure is damaged due to overheated flue gas is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to lime shaft kiln technical field especially relates to a lime shaft kiln denitration device. BACKGROUND

[0002] Lime shaft kiln, also known as lime vertical kiln or lime calcining kiln, is a device for calcining limestone into lime, widely used in building, chemical industry, metallurgy, environmental protection and other fields. The kiln body is provided with air vents and burners on both sides or the bottom for providing air and fuel to make limestone calcine at high temperature. In order to reduce the emission of pollutants in the production process, lime shaft kiln is usually equipped with desulfurization, denitration and other environmental protection facilities to remove particulate matter, sulfur dioxide, nitrogen oxides and other harmful substances in flue gas.

[0003] The lime kiln flue gas denitration device disclosed in the application number 202322850731.2, although the utility model adopts the chute to install the filter screen, the filter screen is placed in the specified position from the upper part of the reaction bucket along the chute, and the two groups of chute positions are crossed and do not interfere with each other, and the filter screen can be placed in layers; the exhaust passage is additionally provided with a water absorption filter screen, the gas filtered by the upper filter screen flows into the lower part after being sprayed by the spraying device, the waste liquid and the treated gas flow into the sewage tank, the external equipment extracts the gas from the exhaust valve, the water absorption filter screen prevents the waste liquid from being sucked into the exhaust valve, and the treatment efficiency is avoided from being affected; the spraying device adopts a shunt column design, and multiple spray pipes uniformly disperse the alkaline solution upward, greatly increasing the contact area of the gas and the solution and improving the treatment efficiency.

[0004] Although the utility model adopts the spraying device and the filter screen and other structures to treat the flue gas, the outlet flue gas temperature of the lime shaft kiln is high, and the high-temperature flue gas may exceed the bearing temperature of the filter screen and the spray head, thereby causing the filter screen to burn out or accelerate aging, the internal structure of the spray head to expand and change, and thereby reducing the dust removal effect and affecting the spraying performance and the denitration efficiency. SUMMARY

[0005] The purpose of this part is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part and the abstract of the specification and the utility model name to avoid obscuring the purpose of this part, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] Therefore, in order to solve the above technical problems, the utility model provides the following technical scheme: a lime shaft kiln denitration device, the lime shaft kiln denitration device comprises:

[0007] The main unit comprises a tank body, a filter plate and a shunt pipe are arranged in the tank body, and a spray head is installed on the shunt pipe;

[0008] The support unit comprises a water storage tank and a medicament tank, a top cover is arranged on the water storage tank and the medicament tank, a fixing frame is detachably connected to the top cover through bolts, and the fixing frame is installed on the surface of the tank body.

[0009] The heat exchange unit comprises a fixed box, the fixed box is installed on the top of the tank body, a serpentine copper pipe is installed in the fixed box, and a water inlet pipe and a water outlet pipe are respectively installed at the two ends of the serpentine copper pipe.

[0010] As a preferred scheme of the lime shaft kiln denitration device, the surface of the tank body is further provided with an exhaust port, the bottom of the tank body is provided with a liquid discharge port, the surface of the liquid discharge port is provided with a valve, the flue gas after denitration can be discharged through the exhaust port, and the solution of water and the reducing agent after denitration can be discharged from the liquid discharge port by opening the valve.

[0011] As a preferred scheme of the lime shaft kiln denitration device, cold water is arranged in the water storage tank, and the medicament tank is provided with a reducing agent; the heat of the flue gas is taken away by the circulation of the cold water in the serpentine copper pipe; and the nitrogen oxides in the flue gas are reduced into harmless substances such as nitrogen and water vapor by spraying the reducing agent into the flue gas.

[0012] As a preferred scheme of the lime shaft kiln denitration device, a first water pump is installed on the top cover of the water storage tank, a second water pump is installed on the top cover of the medicament tank, and a water suction pipe is installed at the input end of each of the first water pump and the second water pump; the cold water or the reducing agent can be pumped out through the water suction pipe by starting the first water pump or the second water pump.

[0013] As a preferred scheme of the lime shaft kiln denitration device, the output end of the first water pump is connected with the bottom end of the water inlet pipe, the output end of the second water pump is connected with a communication pipe, and one end of the communication pipe is connected with the bottom of the shunt pipe; the cold water can be conveyed from the water inlet pipe to the serpentine copper pipe by the first water pump, and the reducing agent can be conveyed from the communication pipe to the shunt pipe by the second water pump.

[0014] As a preferred scheme of the lime shaft kiln denitration device, a water changing pipe is further installed on the top cover, a sealing cover is arranged at the top end of the water changing pipe, the cold water or the reducing agent in the water storage tank or the medicament tank can be replaced through the water changing pipe by removing the sealing cover.

[0015] As a preferred scheme of the lime shaft kiln denitration device, an air inlet is arranged at the top of the fixed box, a temperature sensor is installed in the air inlet, the flue gas outlet of the lime shaft kiln is connected with the air inlet, the flue gas enters the tank body through the air inlet, the temperature of the flue gas is sensed by the temperature sensor and data is transmitted to an external control system such as a computer, and the temperature of the flue gas at the inlet can be monitored.

[0016] The utility model discloses the beneficial effect of:

[0017] When using, the flue gas enters the fixed box through the air inlet, and the temperature sensor senses the flue gas temperature, when the flue gas temperature is too high, the cold water in the water storage tank is pumped out through the first water pump, and is transported to the copper pipe through the water pipe, and the heat in the flue gas is taken away to make it cool down, and the circulating cold water enters the water storage tank through the drain pipe, and the flue gas after cooling is introduced into the tank body and is filtered and denitration, and the cooling is realized through the cold water circulation heat exchange mode, the heat in the flue gas can be quickly absorbed, the flue gas temperature is reduced, and the filter screen is prevented from being burnt or the nozzle structure is prevented from being damaged. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawing needed to be used in the embodiment description, and obviously, the drawing in the following description is only some embodiments of the utility model, and for the ordinary skilled person in the art, other drawings can be obtained according to these drawings without the creative labor, wherein:

[0019] Figure 1 It is the structure schematic drawing of the whole of the lime shaft kiln denitration device of the utility model.

[0020] Figure 2 It is the structure schematic drawing of the main unit of the lime shaft kiln denitration device of the utility model.

[0021] Figure 3 It is the structure schematic drawing of the support unit of the lime shaft kiln denitration device of the utility model.

[0022] Figure 4 It is the structure schematic drawing of the heat exchange unit of the lime shaft kiln denitration device of the utility model.

[0023] Figure 5 It is the cross section structure schematic drawing of the whole of the lime shaft kiln denitration device of the utility model.

[0024] In the drawing: 100, main unit;101, tank body;1011, exhaust port;1012, liquid discharge port;1013, valve;102, filter plate;103, shunt pipe;104, nozzle;

[0025] 200, support unit;201, water storage tank;2011, first water pump;2012, water pumping pipe;202, medicament tank;2021, second water pump;2022, communication pipe;203, top cover;2031, water changing pipe;2032, sealing cover;204, fixing frame;

[0026] 300, heat exchange unit; 301, fixed box; 3011, air inlet; 3012, temperature sensor; 302, copper serpentine pipe; 303, water supply pipe; 304, drain pipe. DETAILED DESCRIPTION

[0027] In order to make the above objectives, features and advantages of the present application more apparent, a detailed description of the specific embodiments of the present application will be given below with reference to the accompanying drawings.

[0028] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0029] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or mutually exclusive of other embodiments.

[0030] Thirdly, the present application is described in detail in conjunction with the schematic diagram, and in order to facilitate the description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual manufacture.

[0031] Embodiment 1

[0032] Reference Figure 1 -5, the first embodiment of the present application provides a lime shaft kiln denitrification device, the structure includes:

[0033] The main unit 100 includes a tank body 101, a filter plate 102 and a shunt pipe 103 are arranged in the tank body 101, a spray head 104 is installed on the shunt pipe 103; The surface of the tank body 101 is also provided with an exhaust port 1011, the bottom of the tank body 101 is provided with a liquid discharge port 1012, the surface of the liquid discharge port 1012 is provided with a valve 1013; After the flue gas is introduced into the tank body 101, the particulate matters in the flue gas are first filtered by the filter plate 102, then the reducing agent in the shunt pipe 103 is sprayed out through the spray head 104, the flue gas is mixed with the reducing agent and reacts, so that the nitrogen oxides in the flue gas are reduced to harmless substances such as nitrogen and water vapor, the nitrogen and the remaining flue gas are discharged through the exhaust port 1011, and the reducing agent and the water solution are discharged through the liquid discharge port 1012 after the valve 1013 is opened.

[0034] The support unit 200 comprises a water storage tank 201 and a medicament tank 202, the water storage tank 201 and the medicament tank 202 are provided with a top cover 203, the top cover 203 is detachably connected with a fixing frame 204 through bolts, the fixing frame 204 is installed on the surface of the tank body 101; the water storage tank 201 is provided with cold water, the medicament tank 202 is provided with a reducing agent; the top cover 203 on the water storage tank 201 is installed with a first water pump 2011, the top cover 203 on the medicament tank 202 is installed with a second water pump 2021, the input ends of the first water pump 2011 and the second water pump 2021 are both installed with a water suction pipe 2012; the output end of the first water pump 2011 is connected with the bottom end of a water delivery pipe 303, the output end of the second water pump 2021 is connected with a communication pipe 2022, one end of the communication pipe 2022 is connected at the bottom of the shunt pipe 103; the top cover 203 is further installed with a water changing pipe 2031, the top end of the water changing pipe 2031 is provided with a sealing cover 2032; first, the top cover 203 is installed on the water storage tank 201 and the medicament tank 202, then the fixing frame 204 is installed on the top cover 203 through bolts, so that the tank body 101 is fixed on the water storage tank 201 and the medicament tank 202, then the cold water in the water storage tank 201 is pumped out through the first water pump 2011, and is delivered into the serpentine copper pipe 302 through the water delivery pipe 303 to cool the flue gas, the reducing agent in the medicament tank 202 is pumped out through the second water pump 2021, and is delivered into the shunt pipe 103 through the communication pipe 2022, and is sprayed into the flue gas through the spray head 104 to react with the flue gas.

[0035] The heat exchange unit 300 comprises a fixed box 301, the fixed box 301 is installed at the top of the tank body 101, the fixed box 301 is installed with a serpentine copper pipe 302, both ends of the serpentine copper pipe 302 are installed with a water delivery pipe 303 and a water discharge pipe 304 respectively; the top of the fixed box 301 is provided with an air inlet 3011, the air inlet 3011 is installed with a temperature sensor 3012; the flue gas enters the fixed box 301 through the air inlet 3011, and the temperature of the flue gas is sensed by the temperature sensor 3012, when the temperature of the flue gas is too high, the cold water in the serpentine copper pipe 302 is circulated through the operation of the heat exchange unit 300, the heat in the flue gas is taken away to cool it, and the circulating cold water enters the water storage tank 201 through the water discharge pipe 304.

[0036] In the use process, first, the top cover 203 is installed on the water storage tank 201 and the medicament tank 202, then the fixing frame 204 is installed on the top cover 203 through bolts, so that the tank body 101 is fixed on the water storage tank 201 and the medicament tank 202;

[0037] Then the flue gas enters into the fixed box 301 through the air inlet 3011, the temperature of the flue gas is sensed by the temperature sensor 3012, when the temperature of the flue gas is too high, the cold water in the water storage box 201 is pumped out by the first water pump 2011, is transported into the copper serpentine pipe 302 through the water pipe 303, takes away the heat in the flue gas to make it cool down, the circulating cold water enters into the water storage box 201 through the drain pipe 304;

[0038] The flue gas after the last cooling is introduced into the tank body 101, the particulate matters in the flue gas are filtered through the filter plate 102, then the second water pump 2021 is started to pump out the reducing agent in the agent box 202, is transported into the shunt pipe 103 through the communication pipe 2022, is sprayed into the flue gas through the spray head 104, the flue gas is mixed with the reducing agent and reacts, the nitrogen oxides in the flue gas are reduced into harmless substances such as nitrogen and water vapor, the nitrogen and the remaining flue gas are discharged through the exhaust port 1011, the reducing agent and the water solution are discharged through the liquid outlet 1012 after the valve 1013 is opened.

[0039] It is worth noting that: the whole device is controlled by the controller, since the controller is a commonly used device, belongs to the existing mature technology, the electrical connection relationship and the specific circuit structure are not repeated here.

[0040] It should be explained that the above embodiments are only used to illustrate the technical scheme of the utility model and not to limit, although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical scheme of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical scheme of the utility model, which should be covered in the scope of the claims of the utility model.

Claims

1. A lime shaft kiln denitration device, characterized in that: Including, The body unit (100) includes a tank body (101), a filter plate (102) and a shunt pipe (103) are arranged in the tank body (101), and a spray head (104) is mounted on the shunt pipe (103); The support unit (200) includes a water storage tank (201) and a medicament tank (202), a top cover (203) is arranged on the water storage tank (201) and the medicament tank (202), a fixing frame (204) is detachably connected to the top cover (203) through bolts, and the fixing frame (204) is mounted on the surface of the tank body (101); The heat exchange unit (300) includes a fixed box (301), the fixed box (301) is mounted on the top of the tank body (101), a coiled copper pipe (302) is mounted in the fixed box (301), and water inlet pipes (303) and water outlet pipes (304) are mounted at both ends of the coiled copper pipe (302).

2. The lime shaft kiln denitration device according to claim 1, characterized in that: An exhaust port (1011) is further mounted on the surface of the tank body (101), a liquid outlet (1012) is mounted at the bottom of the tank body (101), and a valve (1013) is arranged on the surface of the liquid outlet (1012).

3. The lime shaft kiln denitration device according to claim 1, characterized in that: Cold water is arranged in the water storage tank (201), and a reducing agent is arranged in the medicament tank (202).

4. The lime shaft kiln denitration device according to claim 1, characterized in that: A first water pump (2011) is mounted on the top cover (203) of the water storage tank (201), a second water pump (2021) is mounted on the top cover (203) of the medicament tank (202), and water suction pipes (2012) are mounted at the input ends of the first water pump (2011) and the second water pump (2021).

5. The lime shaft kiln denitration device according to claim 4, characterized in that: The output end of the first water pump (2011) is connected to the bottom end of the water inlet pipe (303), the output end of the second water pump (2021) is connected to a communication pipe (2022), and one end of the communication pipe (2022) is connected to the bottom of the shunt pipe (103).

6. The lime shaft kiln denitration device according to claim 1, characterized in that: A water changing pipe (2031) is further mounted on the top cover (203), and a sealing cover (2032) is arranged at the top end of the water changing pipe (2031).

7. The lime shaft kiln denitration device according to claim 1, characterized in that: An air inlet (3011) is arranged at the top of the fixed box (301), and a temperature sensor (3012) is mounted in the air inlet (3011).

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