SNCR (selective non-catalytic reduction) denitration device

Abstract

The SNCR denitration device comprises a box body and a spray gun, a control module, a distribution module, an air module and a reducing agent conveying module are arranged in the box body, the control module is embedded in the surface of the box body, the output end of the reducing agent conveying module is connected with the input end of the distribution module, and the output end of the distribution module is connected with the air module. The output end of the distribution module is connected with the spray gun, the output end of the air module is connected with the spray gun, and the control module is electrically connected with the distribution module, the air module and the reducing agent conveying module. The control module, the distribution module, the air module and the reducing agent conveying module are integrated in the box body, the integrated arrangement mode is adopted, the occupied space is small, operation is centralized and convenient, management and control by workers are facilitated, and problems can be found in time.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of boiler flue gas denitration system, in particular to a SNCR denitration device. BACKGROUND

[0002] The principle of SNCR denitration system is that the reducing agent containing amino group (such as ammonia water, urea solution, etc.) is sprayed into the area with the furnace temperature of 850-1100℃, the reducing agent is rapidly thermally decomposed into NH3 and reacts with NOx in the flue gas to generate N2 and H2O, thereby realizing denitration.

[0003] The reducing agent delivery module, distribution module, air module and control system module of the traditional SNCR denitration system are independent, which occupies large area, has many operation units and is complicated to operate. CONTENT OF THE UTILITY MODEL

[0004] The present disclosure provides a SNCR denitration device to solve one of the technical problems recognized by the inventors.

[0005] The present disclosure provides a SNCR denitration device, which comprises a box body and a lance, a control module, a distribution module, an air module and a reducing agent delivery module are arranged in the box body, the control module is embedded on the surface of the box body, the output end of the reducing agent delivery module is connected with the input end of the distribution module, the output end of the distribution module is connected with the lance, the output end of the air module is connected with the lance, and the control module is electrically connected with the distribution module, the air module and the reducing agent delivery module respectively.

[0006] Preferably, the reducing agent delivery module comprises a reducing agent input pipeline, at least one reducing agent delivery pipeline and a reducing agent delivery main pipeline, one end of the reducing agent input pipeline is arranged on the outside of the box body and connected with a reducing agent inlet, the other end of the reducing agent input pipeline is connected with the input end of the reducing agent delivery pipeline, the output end of the reducing agent delivery pipeline is connected with the input end of the reducing agent delivery main pipeline, and the output end of the reducing agent delivery main pipeline is connected with the input end of the distribution module.

[0007] Preferably, the reducing agent delivery pipeline has two.

[0008] Preferably, a delivery pump is arranged on the reducing agent delivery pipeline, and an inlet valve and an outlet valve are arranged at two ends of the delivery pump respectively, and a check valve is arranged between the outlet valve and the reducing agent delivery main pipeline.

[0009] Preferably, a Y-type filter is arranged between the inlet valve and the reducing agent input pipeline.

[0010] Preferably, an electromagnetic flow meter and an automatic regulating valve are arranged between the reducing agent delivery main pipe and the distribution module.

[0011] Preferably, the distribution module comprises at least one reducing agent distribution pipe connected with the reducing agent delivery main pipe, a flow meter is connected at one end of the reducing agent distribution pipe, a proportional valve is arranged on the reducing agent distribution pipe, the flow meter is embedded on the surface of the box, an input end of the flow meter is connected with the reducing agent distribution pipe, and an output end of the flow meter is connected with the spray gun.

[0012] Preferably, a total pressure gauge and at least one partial pressure gauge are embedded on the surface of the box, the total pressure gauge is used to detect the pressure of the reducing agent delivery main pipe, the number of the partial pressure gauges is the same as that of the reducing agent distribution pipes and the partial pressure gauges correspond to the reducing agent distribution pipes one by one, and the partial pressure gauges are used to detect the pressure of the reducing agent distribution pipes.

[0013] Preferably, the air module comprises an air main pipe and at least one air distribution pipe, the air main pipe is connected with input ends of the air distribution pipes, and output ends of the air distribution pipes are connected with the spray gun.

[0014] Preferably, an air proportional regulating valve and an air pressure gauge are arranged on the air distribution pipe, and the air pressure gauge is embedded on the surface of the box.

[0015] The beneficial effects of the present disclosure mainly lie in that the control module, the distribution module, the air module and the reducing agent delivery module are integrated in one box, the integrated arrangement occupies a small area, is convenient to operate and conducive to the control of the staff, and problems can be found in time.

[0016] It should be understood that both the foregoing general description and the following detailed description are intended for purposes of illustration and description, and are not intended to limit the disclosure. The accompanying drawings are referred to, which illustrate the subject matter of the present disclosure. Meanwhile, the specification and the drawings serve to explain the principles of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the specific embodiments of the present disclosure or the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0018] Fig. 1 Structure schematic diagram of the denitration device of the embodiment of the present disclosure;

[0019] Fig. 2Structure schematic diagram of control module and reducing agent delivery module of embodiments of the present disclosure;

[0020] Figure: 1 - box; 2 - control module; 31 - reducing agent input pipeline; 32 - reducing agent delivery pipeline; 321 - delivery pump; 322 - inlet valve; 323 - outlet valve; 324 - check valve; 325 - Y-type filter; 33 - reducing agent delivery main pipeline; 331 - electromagnetic flow meter; 332 - automatic regulating valve; 41 - reducing agent distribution pipeline; 42 - flow meter; 43 - proportional valve; 51 - air main pipeline; 52 - air distribution pipeline; 53 - air proportional regulating valve; 54 - air pressure gauge; 61 - total pressure gauge; 62 - partial pressure gauge. DETAILED DESCRIPTION

[0021] The technical solutions of the present disclosure will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments.

[0022] Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present disclosure.

[0023] In the description of the present disclosure, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements 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 present disclosure. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present disclosure, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0025] Embodiments

[0026] As Figs. 1-2As shown, this embodiment provides an SNCR denitrification device, including a housing 1 and a spray gun. The housing 1 contains a control module 2, a distribution module, an air module, and a reducing agent delivery module. The control module 2 is located on the upper part of the housing 1 and includes a controller, a touch screen, and control buttons. The controller is located inside the housing 1, while the touch screen and control buttons are embedded on the surface of the housing 1. The reducing agent delivery module, distribution module, and air module are located inside the housing 1. The output end of the reducing agent delivery module is connected to the distribution module, the output end of the distribution module is connected to the spray gun, and the output end of the air module is connected to the spray gun. The control module 2 is used to control the operation of the reducing agent delivery module, distribution module, and air module.

[0027] Specifically, the reducing agent delivery module includes a reducing agent input pipe 31, at least one reducing agent delivery pipe 32, and a reducing agent delivery manifold 33. One end of the reducing agent input pipe 31 is located outside the housing 1 and connected to a reducing agent inlet. The other end of the reducing agent input pipe 31 is connected to the input end of the reducing agent delivery pipe 32. The output end of the reducing agent delivery pipe 32 is connected to the input end of the reducing agent delivery manifold 33. The output end of the reducing agent delivery manifold 33 is connected to the input end of the distribution module. The reducing agent is input through the reducing agent input pipe 31, enters the reducing agent delivery manifold 33 through the reducing agent delivery pipe 32, and finally enters the distribution module for distribution and output to the spray gun.

[0028] There are two reducing agent delivery pipes 32, which are arranged side by side and can be used interchangeably. If one of them fails, the other can be used instead.

[0029] Specifically, a delivery pump 321 is installed on the reducing agent delivery pipeline 32 to deliver the reducing agent. An inlet valve 322 and an outlet valve 323 are respectively installed at both ends of the delivery pump 321 to control the on / off state of the delivery pump 321. A check valve 324 is installed between the outlet valve 323 and the reducing agent delivery main pipeline 33 to prevent the reducing agent from flowing back.

[0030] Furthermore, a Y-type filter 325 is provided between the inlet valve 322 and the reducing agent input pipe 31. The Y-type filter 325 is used to filter large particulate impurities and prevent the spray gun from clogging.

[0031] Furthermore, an electromagnetic flowmeter 42331 and an automatic regulating valve 332 are installed between the reducing agent delivery main pipe 33 and the distribution module. The electromagnetic flowmeter 42331 detects the reducing agent flow rate, and the automatic regulating valve 332 adjusts the flow rate based on the detected data.

[0032] Specifically, the distribution module includes at least one reducing agent distribution pipe 41 connected with the reducing agent delivery main pipe 33. In this embodiment, the number of reducing agent distribution pipes 41 is six. Each reducing agent distribution pipe 41 is connected with the reducing agent delivery main pipe 33 through. The end of the reducing agent distribution pipe 41 away from the reducing agent distribution main pipe is connected with a flow meter 42. The flow meter 42 is embedded on the surface of the box 1. The display end of the flow meter 42 is embedded on the surface of the box 1, which facilitates the observation of the flow data of each flow meter 42. The flow meter 42 is provided with an inlet and an outlet on the inner side of the box 1. The inlet of the flow meter 42 is connected with the reducing agent distribution pipe 41. The outlet of the flow meter 42 is connected with the spray gun. The reducing agent is divided into each reducing agent distribution pipe 41 through the reducing agent delivery main pipe 33, and then output to the spray gun after passing through the flow meter 42. The reducing agent injection amount distributed to each spray gun is monitored according to the flow meter 42. The proportioning valve 43 can adjust the reducing agent injection amount of each spray gun. The injection amount can be directly displayed through the flow meter 42, so that the injection amount of each spray gun can be quickly adjusted.

[0033] Further, the surface of the box 1 is embedded with a total pressure gauge 61 and at least one partial pressure gauge 62. The total pressure gauge 61 is used to detect the pressure of the reducing agent delivery main pipe 33. The number of partial pressure gauges 62 is the same as that of reducing agent distribution pipes 41 and one-to-one correspondence. The partial pressure gauge 62 is used to detect the pressure of the reducing agent distribution pipe 41. In this embodiment, the number of partial pressure gauges 62 is the same as that of reducing agent distribution pipes 41. The pressure of the reducing agent delivery main pipe is displayed through the total pressure gauge 61. The pressure of the reducing agent of each spray gun is displayed through each partial pressure gauge 62, which facilitates the judgment and adjustment of the injection effect of each spray gun.

[0034] Specifically, the air module includes an air main pipe 51 and at least one air distribution pipe 52. The air main pipe 51 is connected with the input end of the air distribution pipe 52. The output end of the air distribution pipe 52 is connected with the spray gun. The air main pipe 51 is used to connect the device for providing air. The air passes through the air main pipe 51 and then is divided into each air distribution pipe 52. In this embodiment, the number of air distribution pipes 52 is six. Each air distribution pipe 52 is connected with one spray gun respectively.

[0035] Further, the air distribution pipe 52 is provided with an air proportional adjusting valve 53 and an air pressure gauge 54, and the air pressure gauge 54 is embedded on the surface of the box 1. The air proportional adjusting valve 53 is used to adjust the air distribution proportion of each spray gun, so that the proportion of the reducing agent and the air of the spray gun is matched, and the spraying effect is best. The air pressure gauge 54 is used to observe the air pressure in the spray gun, so that the air proportional adjusting valve 53 can quickly and accurately adjust the matched air amount.

[0036] The working principle of the utility model is: the reducing agent enters from the reducing agent input pipeline 31, is transported into the reducing agent transport main pipe 33 through the transport pump 321 of one of the reducing agent transport pipelines 32, filters large particles through the Y type filter 325, avoids the spray gun to be blocked, after the reducing agent passes through the reducing agent transport main pipe 33, enters the reducing agent distribution pipe 41, is output to the spray gun after passing through the flowmeter 42, according to the reducing agent spraying amount of each spray gun monitored by the flowmeter 42, the proportional valve 43 can adjust the reducing agent spraying amount of each spray gun, the spraying amount can be directly displayed through the flowmeter 42, thereby the spraying amount of each spray gun is adjusted rapidly, simultaneously, the air passes through the air main pipe 51, then is shunted to each air distribution pipe 52, finally enters the spray gun, makes the reducing agent and the air enter the spray gun simultaneously.

[0037] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A SNCR denitration device, characterized by, The box and the spray gun, the control module, the distribution module, the air module and the reducing agent delivery module are arranged in the box, the control module is embedded on the surface of the box, the output end of the reducing agent delivery module is connected with the input end of the distribution module, the output end of the distribution module is connected with the spray gun, the output end of the air module is connected with the spray gun, and the control module is electrically connected with the distribution module, the air module and the reducing agent delivery module. The reducing agent delivery module comprises a reducing agent input pipeline, at least one reducing agent delivery pipeline and a reducing agent delivery main pipeline, one end of the reducing agent input pipeline is arranged outside the box and connected with a reducing agent inlet, the other end of the reducing agent input pipeline is connected with the input end of the reducing agent delivery pipeline, the output end of the reducing agent delivery pipeline is connected with the input end of the reducing agent delivery main pipeline, and the output end of the reducing agent delivery main pipeline is connected with the input end of the distribution module.

2. The SNCR denitration device according to claim 1, characterized in that, The reducing agent delivery pipeline has two.

3. The SNCR denitration device according to claim 2, characterized in that, The reducing agent delivery pipeline is provided with a delivery pump, and the two ends of the delivery pump are respectively provided with an inlet valve and an outlet valve, and a check valve is arranged between the outlet valve and the reducing agent delivery main pipeline.

4. The SNCR denitration device according to claim 3, characterized in that, A Y-type filter is arranged between the inlet valve and the reducing agent input pipeline.

5. The SNCR denitration device according to claim 4, characterized in that, An electromagnetic flowmeter and an automatic regulating valve are arranged between the reducing agent delivery main pipeline and the distribution module.

6. The SNCR denitration device according to claim 2, characterized in that, The distribution module comprises at least one reducing agent distribution pipeline connected with the reducing agent delivery main pipeline, one end of the reducing agent distribution pipeline is connected with a flowmeter, a proportional valve is arranged on the reducing agent distribution pipeline, the flowmeter is embedded on the surface of the box, the input end of the flowmeter is connected with the reducing agent distribution pipeline, and the output end of the flowmeter is connected with the spray gun.

7. The SNCR denitration device according to claim 6, characterized in that, The surface of the box is embedded with a total pressure gauge and at least one partial pressure gauge, the total pressure gauge is used for detecting the pressure of the reducing agent delivery main pipeline, the number of the partial pressure gauges is the same as that of the reducing agent distribution pipelines and corresponds to the reducing agent distribution pipelines one by one, and the partial pressure gauges are used for detecting the pressure of the reducing agent distribution pipelines.

8. The SNCR denitration device according to claim 2, characterized in that, The air module comprises an air main pipeline and at least one air distribution pipeline, the air main pipeline is connected with the input end of the air distribution pipeline, and the output end of the air distribution pipeline is connected with the spray gun.

9. The SNCR denitration device according to claim 1, characterized in that, An air proportional regulating valve and an air pressure gauge are arranged on the air distribution pipeline, and the air pressure gauge is embedded on the surface of the box.

10. The SNCR denitration device according to claim 9, characterized in that, ​

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