Flue gas denitration device
By using temperature sensors and electric valves to regulate the flue gas path in the flue gas denitrification device, the problem of unstable flue gas temperature was solved, thereby improving the denitrification efficiency and temperature stability in the waste heat boiler of the glass kiln and ensuring that the denitrification effect meets the design requirements.
Patent Information
- Application Number
- CN202422849920.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-21
AI Technical Summary
In the waste heat boiler配套的废热钵工, the flue gas temperature at the outlet is often lower than the design value or fluctuates, resulting in poor denitrification efficiency, difficulty in reaching the ideal temperature, and affecting the denitrification effect and emission standards.
By using a temperature sensor to monitor the flue gas temperature in the flue gas denitrification device, and by using an electric flap valve and an electric regulating valve to adjust the flue gas flow path, some flue gas bypasses the heat exchanger and enters the denitrification device directly, ensuring that the flue gas temperature reaches the ideal range of 350℃~380℃.
It improves the stability of flue gas temperature and denitrification efficiency during denitrification, ensuring that the denitrification reaction takes place within the optimal temperature range, thus enhancing the stability and economy of denitrification.
Smart Images
Figure CN223555791U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to flue gas denitration technical field, especially relate to a flue gas denitration device. BACKGROUND
[0002] At present, in the waste heat boiler matched with the glass kiln generation line, the flue gas with the smoke temperature of 350 DEG C ~ 380 DEG C is often considered to be led out from the flue gas leading-out port in the middle of the boiler to carry out denitration, and the flue gas is led back to the boiler to continue heat exchange after denitration is completed. When the boiler is designed in the early stage, the position of the flue gas leading-out port is determined under the theoretical design condition, but in actual operation, the actual smoke temperature at the flue gas leading-out port is often lower than 350 DEG C for a long time or is prone to fluctuation due to the reduction of output or the change of fuel, thereby leading to the difficulty in reaching the ideal value of the flue gas temperature during denitration, further affecting the denitration efficiency, and causing the problems of incomplete flue gas denitration reaction or non-standard emission. CONTENT
[0003] The utility model discloses to overcome prior art defects, provide a kind of flue gas denitration device, the flue gas temperature during denitration can be adjusted.
[0004] The utility model discloses a kind of flue gas denitration devices, which comprises:
[0005] A flue gas denitration device comprises:
[0006] A boiler comprises a first furnace body, a flue gas inlet and a flue gas outlet are arranged at the lower part and the upper part of the first furnace body respectively, a plurality of first heat exchangers are arranged in the first furnace body from bottom to top, and an electric flap valve is arranged in the first furnace body. The electric flap valve and the first heat exchangers are arranged on the same cross section of the first furnace body.
[0007] A flue gas inlet pipe is connected to the flue gas inlet.
[0008] A flue gas outlet pipe is connected to the flue gas outlet at one end and connected to a denitration device at the other end. A temperature sensor is arranged on the flue gas outlet pipe.
[0009] A controller is electrically connected to the electric flap valve and the temperature sensor.
[0010] The above technical scheme has the following beneficial effects: the temperature sensor can monitor the temperature of the flue gas in the flue gas outlet pipe. When the temperature of the flue gas in the flue gas outlet pipe is low, the electric flap valve is opened. Part of the flue gas does not exchange heat with part of the first heat exchangers and directly passes through the electric flap valve into the flue gas outlet pipe. This increases the temperature of the flue gas in the flue gas outlet pipe and the flue gas entering the denitration device. The temperature of the flue gas during denitration is adjusted to reach the ideal temperature, and the stability during denitration is improved.
[0011] In one embodiment, the flue gas denitration device comprises a bypass pipe connected with the flue gas input pipe and the flue gas outlet pipe at two ends, the connection between the bypass pipe and the flue gas outlet pipe is located at one end of the temperature sensor close to the flue gas outlet, and the bypass pipe is provided with a first electric regulating valve electrically connected with the controller.
[0012] The beneficial effects of the above technical scheme are that: opening the first electric regulating valve can make the flue gas which has not been heat exchanged directly enter the flue gas outlet pipe through the bypass pipe, thereby increasing the temperature of the flue gas in the flue gas outlet pipe and the flue gas entering the denitration device, so as to further adjust the flue gas temperature during denitration, and also make the flue gas temperature during denitration reach the ideal temperature and improve the stability during denitration.
[0013] In one embodiment, the flue gas input pipe is provided with a second electric regulating valve.
[0014] In one embodiment, the connection between the bypass pipe and the flue gas input pipe is located at one end of the second electric regulating valve away from the flue gas input port.
[0015] In one embodiment, the flue gas outlet pipe is provided with a third electric regulating valve.
[0016] In one embodiment, the connection between the bypass pipe and the flue gas outlet pipe is located at one end of the third electric regulating valve away from the flue gas outlet port.
[0017] In one embodiment, the boiler comprises a second furnace body arranged above the first furnace body, the lower part of the second furnace body is provided with a flue gas inlet port, the second furnace body is provided with a second heat exchanger, and the flue gas inlet pipe is connected between the denitration device and the flue gas inlet port.
[0018] In one embodiment, the flue gas inlet pipe is provided with a fourth electric regulating valve.
[0019] In one embodiment, the flue gas cutoff valve is arranged between the first furnace body and the second furnace body.
[0020] In one embodiment, the flue gas cutoff valve is a gate valve, a louver or a steel plate.
[0021] The beneficial effects of the utility model lie in:
[0022] The temperature sensor can monitor the temperature of the flue gas in the flue gas outlet pipe, so as to open the electric flap valve when the temperature of the flue gas in the flue gas outlet pipe is low, so that part of the flue gas is not heat exchanged with part of the first heat exchanger and directly enters the flue gas outlet pipe through the electric flap valve, thereby increasing the temperature of the flue gas in the flue gas outlet pipe and the flue gas entering the denitration device, further adjusting the flue gas temperature during denitration, so that the flue gas temperature during denitration reaches the ideal temperature, and improving the stability during denitration. BRIEF DESCRIPTION OF DRAWINGS
[0023] The utility model will be described in further detail below based on the embodiments and with reference to the drawings.
[0024] Wherein:
[0025] Figure 1 The structure schematic diagram of the utility model is shown;
[0026] In the drawings, the same parts use the same reference signs. The drawings are not in accordance with the actual proportion.
[0027] Reference signs:
[0028] 1-First furnace body, 2-First heat exchanger, 3-Electric flap valve, 4-Smoke gas cut-off valve, 5-Second furnace body, 6-Second heat exchanger, 7-Fourth electric regulating valve, 8-Smoke gas introduction pipe, 9-De-nitrator, 10-Temperature sensor, 11-Smoke gas lead-out pipe, 12-Third electric regulating valve, 13-Bypass pipe, 14-First electric regulating valve, 15-Smoke gas input pipe, 16-Second electric regulating valve. DETAILED DESCRIPTION
[0029] The utility model will be described in further detail below based on the embodiments and with reference to the drawings.
[0030] The utility model provides a kind of flue gas de-nitrating device, as Figure 1 As shown in the figure, it includes:
[0031] Boiler, boiler includes first furnace body 1, the lower part and upper part of first furnace body 1 are provided with smoke gas input and smoke gas lead-out respectively, first furnace body 1 is provided with a plurality of first heat exchanger 2 from bottom to top in sequence in first furnace body 1, first furnace body 1 is provided with electric flap valve 3, electric flap valve 3 and first heat exchanger 2 are transversely arranged on the same cross section of first furnace body 1;
[0032] Smoke gas input pipe 15, smoke gas input pipe 15 is communicated smoke gas input;
[0033] Smoke gas lead-out pipe 11, one end of smoke gas lead-out pipe 11 is communicated smoke gas lead-out, the other end of smoke gas lead-out pipe 11 is communicated de-nitrator 9, and temperature sensor 10 is arranged on smoke gas lead-out pipe 11;
[0034] Controller, controller is electrically connected electric flap valve 3 and temperature sensor 10.
[0035] It can be understood that the temperature sensor 10 can monitor the temperature of the flue gas in the flue gas leading pipe 11, so as to open the electric flap valve 3 when the temperature of the flue gas in the flue gas leading pipe 11 is low, so that part of the flue gas is not exchanged with part of the first heat exchanger 2 and directly passes through the electric flap valve 3 into the flue gas leading pipe 11, thereby increasing the temperature of the flue gas in the flue gas leading pipe 11 and entering the denitrator 9, and further automatically adjusting the flue gas temperature during denitrification to make the flue gas temperature during denitrification reach 350-380℃, and improve the stability and economy during denitrification.
[0036] It should be noted that the electric flap valve 3 can be provided on the side of the uppermost first heat exchanger 2 in the first furnace body 1; and the controller can be a PCB board loaded with a C51 single-chip microcomputer.
[0037] In one embodiment, the flue gas denitrification device comprises a bypass pipe 13 communicating with the flue gas input pipe 15 and the flue gas leading pipe 11 at both ends, the communication position of the bypass pipe 13 with the flue gas leading pipe 11 is located at one end of the temperature sensor 10 close to the flue gas outlet, and the bypass pipe 13 is provided with a first electric regulating valve 14 electrically connected with the controller.
[0038] It can be understood that opening the first electric regulating valve 14 can make the flue gas that has not been exchanged directly pass through the bypass pipe 13 into the flue gas leading pipe 11, thereby increasing the temperature of the flue gas in the flue gas leading pipe 11 and entering the denitrator 9, to further adjust the flue gas temperature during denitrification, and also make the flue gas temperature during denitrification reach 350-380℃, and improve the stability during denitrification.
[0039] In one embodiment, the second electric regulating valve 16 is arranged on the flue gas input pipe 15.
[0040] In one embodiment, the communication position of the bypass pipe 13 with the flue gas input pipe 15 is located at one end of the second electric regulating valve 16 away from the flue gas input port.
[0041] In one embodiment, the third electric regulating valve 12 is arranged on the flue gas leading pipe 11.
[0042] In one embodiment, the communication position of the bypass pipe 13 with the flue gas leading pipe 11 is located at one end of the third electric regulating valve 12 away from the flue gas outlet.
[0043] In one embodiment, the boiler comprises a second furnace body 5 arranged above the first furnace body 1, the lower part of the second furnace body 5 is provided with a flue gas inlet port, the second furnace body 5 is provided with a second heat exchanger 6, and the denitrator 9 and the flue gas inlet port are communicated with a flue gas leading pipe 8.
[0044] In one embodiment, the fourth electric regulating valve 7 is arranged on the flue gas leading pipe 8.
[0045] In one embodiment, a flue gas intercepting valve 4 is arranged between the first furnace body 1 and the second furnace body 5, and the flue gas intercepting valve 4 separates the boiler into the first furnace body 1 and the second furnace body 5.
[0046] In one embodiment, the flue gas intercepting valve 4 is a gate valve, a shutter or a steel plate.
[0047] The working process of the utility model is as follows:
[0048] Under normal circumstances, the second electric regulating valve 16, the third electric regulating valve 12 and the fourth electric regulating valve 7 are fully opened, the flue gas intercepting valve 4, the first electric regulating valve 14 and the electric flap valve 3 are fully closed, and the flue gas is discharged to the atmosphere under the premise of reaching the emission standard after passing through the flue gas input pipe 15, the first furnace body 1, the flue gas output pipe 11, the denitration device 9, the flue gas input pipe 8 and the second furnace body 5 in turn;
[0049] When the temperature sensor 10 monitors that the flue gas temperature in the flue gas output pipe 11 does not reach the ideal temperature, the electric flap valve 3 is opened, so that part of the flue gas does not exchange heat with part of the first heat exchanger 2 and directly enters the flue gas output pipe 11 through the electric flap valve 3, so that this part of the flue gas mixes with the part of the flue gas after exchanging heat with the first heat exchanger 2, and the flue gas temperature during denitration is adjusted to the ideal temperature;
[0050] When the temperature sensor 10 monitors that the flue gas temperature in the flue gas output pipe 11 does not reach the ideal temperature after the electric flap valve 3 is opened, the first electric regulating valve 14 is opened, and the flue gas that has not been exchanged directly enters the flue gas output pipe 11 through the bypass pipe 13, so as to adjust the flue gas temperature during denitration to the ideal temperature.
[0051] It should be noted that the opening of the electric flap valve 3 and the first electric regulating valve 14 can be adjusted by a preset temperature interval; if the temperature sensor 10 monitors that the flue gas temperature in the flue gas output pipe 11 is lower than 355℃, 8% is opened; if the temperature sensor 10 monitors that the flue gas temperature in the flue gas output pipe 11 is lower than 345℃, 15% is opened; in this way, the denitration reaction is always in the best reaction temperature range of 350℃-380℃, so as to ensure the denitration effect.
[0052] It should be further noted that by adjusting the proportion of flue gas at different temperatures entering the flue gas output pipe 11, the flue gas temperature in the denitration device 9 can reach the best denitration temperature, thereby effectively improving the denitration efficiency.
[0053] In the description of the utility model, it is understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0054] While the utility model has been described herein with reference to particular embodiments thereof, it is to be understood that these embodiments are merely illustrative of the principles and applications of the utility model. It is therefore to be understood that numerous modifications can be made to the illustrative embodiments and that other arrangements can be devised without departing from the spirit and scope of the utility model as defined by the appended claims. It is to be understood that the features of the dependent claims can be combined with features of the utility model described herein in any way other than as explicitly described above. It is also to be understood that features described with respect to one embodiment can be used in other embodiments.
Claims
1. A flue gas denitrification device, characterized in that, include: The boiler includes a first furnace body (1), the lower part and the upper part of the first furnace body (1) are respectively provided with a flue gas inlet and a flue gas outlet, a plurality of first heat exchangers (2) are arranged in the first furnace body (1) from bottom to top, and an electric flap valve (3) is arranged in the first furnace body (1), the electric flap valve (3) and the first heat exchangers (2) are arranged laterally on the same cross section of the first furnace body (1); A flue gas inlet pipe (15) is connected to the flue gas inlet. A flue gas outlet pipe (11) is provided, one end of which is connected to the flue gas outlet and the other end of which is connected to the denitrification unit (9). A temperature sensor (10) is provided on the flue gas outlet pipe (11). The controller is electrically connected to the electric flap valve (3) and the temperature sensor (10).
2. The flue gas denitrification device according to claim 1, characterized in that, It includes a bypass pipe (13) with its two ends connected to the flue gas inlet pipe (15) and the flue gas outlet pipe (11) respectively. The connection between the bypass pipe (13) and the flue gas outlet pipe (11) is located at the end of the temperature sensor (10) near the flue gas outlet. A first electric regulating valve (14) electrically connected to the controller is provided on the bypass pipe (13).
3. The flue gas denitrification device according to claim 2, characterized in that, A second electric regulating valve (16) is provided on the flue gas inlet pipe (15).
4. The flue gas denitrification device according to claim 3, characterized in that, The connection point between the bypass pipe (13) and the flue gas inlet pipe (15) is located at the end of the second electric regulating valve (16) away from the flue gas inlet.
5. A flue gas denitrification device according to claim 2, characterized in that, A third electric regulating valve (12) is installed on the flue gas outlet pipe (11).
6. The flue gas denitrification device according to claim 5, characterized in that, The connection point between the bypass pipe (13) and the flue gas outlet pipe (11) is located at the end of the third electric regulating valve (12) away from the flue gas outlet.
7. The flue gas denitrification device according to claim 1, characterized in that, The boiler includes a second furnace body (5) located above the first furnace body (1). A flue gas inlet is provided at the lower part of the second furnace body (5). A second heat exchanger (6) is provided inside the second furnace body (5). A flue gas inlet pipe (8) is connected between the denitrifier (9) and the flue gas inlet.
8. A flue gas denitrification device according to claim 7, characterized in that, A fourth electric regulating valve (7) is installed on the flue gas inlet pipe (8).
9. A flue gas denitrification device according to claim 7, characterized in that, A flue gas shut-off valve (4) is provided between the first furnace body (1) and the second furnace body (5).
10. A flue gas denitrification device according to claim 9, characterized in that, The flue gas shut-off valve (4) is a gate valve, a louver, or a steel plate.