Pressure measuring device and desulfurization and denitrification equipment

Abstract

The invention discloses a pressure measuring device and desulfurization and denitration equipment, the pressure measuring device comprises a sampler, a heating device, a sampling pipe and a pressure detection assembly, a pipeline is communicated with an inner cavity of the sampler, and the heating device comprises a heating piece arranged on the outer wall of the sampler. The first end of the sampling tube is connected with the sampler, and the sampling tube is communicated with the inner cavity. The pressure detection assembly is mounted at the second end of the sampling tube, the first end and the second end are two opposite ends of the sampling tube, and the pressure detection assembly is used for detecting sampling pressure. According to the pressure measuring device provided by the invention, the heating device is arranged to heat the material, so that the condition that the material is crystallized and blocked at a low temperature can be prevented, the pressure in the pipeline can be accurately measured by the pressure detection assembly, and therefore, the pressure measuring accuracy of the pressure measuring device provided by the invention is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a pressure measuring device and desulfurization and denitrification equipment. Background Art

[0002] Due to the increasingly stringent environmental protection requirements for thermal power plants, the desulfurization and denitrification equipment of supercritical units is complex and requires a complete system. During desulfurization, urea needs to be dissolved and heated to release ammonia, which is then sprayed into the pipeline. A pressure measuring device is installed on the pipeline to detect the pressure inside the pipeline.

[0003] However, the pressure measurement in the pipeline is blocked by the crystallization of urea, and when measuring the flue gas at the induced draft fan inlet, due to the strong corrosiveness of sulfides, it is also very easy to cause the pressure measuring device at the pressure measuring point to be frequently blocked and crystallized, resulting in poor pressure measurement accuracy.

[0004] Therefore, how to improve the pressure measurement accuracy of the pressure measuring device is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a pressure measuring device, the pressure measuring accuracy of which is improved. Another object of the present invention is to provide a desulfurization and denitrification device comprising the pressure measuring device.

[0006] The pressure measuring device provided in this application includes: A sampler, wherein the inner cavity of the sampler is connected to the pipeline; A heating device, the heating device comprising a heating element arranged on the outer wall of the sampler; A sampling tube, a first end of which is connected to the sampler, and the sampling tube is in communication with the inner cavity; A pressure detection assembly is installed at the second end of the sampling tube, the first end and the second end are opposite ends of the sampling tube, and the pressure detection assembly is used to detect the sampling pressure.

[0007] Optionally, in the above pressure measuring device, a stirrer is further included, and the stirrer includes: Motor; A stirring assembly is arranged in the inner cavity to stir the sample in the sampler. The stirring assembly includes a worm and a worm wheel drivingly connected to the motor output shaft. The worm wheel is drivingly connected to the worm. The worm is installed on the sampler through a support member, and the support member is slidably connected to the worm.

[0008] Optionally, in the above pressure measuring device, it further includes: A second control module; The second timing module is connected to the second control module, the stirrer is connected to the second control module, and the second control module controls the stirrer to work for a preset time period after a preset time interval.

[0009] Optionally, in the above pressure measuring device, the sampler comprises: A sampling tube, the inlet of which is connected to the pipeline; A sampling body is connected to the outlet of the sampling tube and the inlet of the sampling tube. The cross-sectional area of ​​the inner cavity of the sampling tube along the direction perpendicular to the material flow in the sampler is smaller than the cross-sectional area of ​​the inner cavity of the sampling body.

[0010] Optionally, in the above-mentioned pressure measuring device, the sampling tube is detachably connected to the pipeline through a fastener, and the fastener includes a nut fixedly connected to the pipeline and an external thread arranged on the outer periphery of the sampling tube, and the sampling tube is threadedly connected to the nut.

[0011] Optionally, in the above pressure measuring device, the fastener comprises: A first flange, wherein the first flange is disposed on the outer periphery of the end of the pipeline; A second flange, the second flange being arranged on the outer periphery of the end of the injection tube; Fasteners, the first flange and the second flange are locked by fasteners arranged circumferentially.

[0012] Optionally, in the above pressure measuring device, the sampling tube is connected to the bottom end of the sampling body, and the bottom end of the inner cavity of the sampling body is a conical cavity that gradually expands upward.

[0013] Optionally, in the above-mentioned pressure measuring device, the heating element is also included in the form of a heating plate or a heating wire arranged on the outer wall of the sampler.

[0014] Optionally, in the above pressure measuring device, it further includes: a first control module; A first timing module, wherein the first timing module is connected to the first control module, the heating device is connected to the first control module, and the first control module controls the heating device to work for a preset time period after a preset time interval.

[0015] A desulfurization and denitrification device comprises a pressure measuring device, wherein the pressure measuring device is any one of the pressure measuring devices described above.

[0016] In the above technical scheme, the pressure measuring device provided by the present invention includes a sampler, a heating device, a sampling tube and a pressure detection assembly. The pipeline is connected to the inner cavity of the sampler, and the heating device includes a heating element arranged on the outer wall of the sampler. The first end of the sampling tube is connected to the sampler, and the sampling tube is connected to the inner cavity. The pressure detection assembly is installed at the second end of the sampling tube, and the first end and the second end are the opposite ends of the sampling tube. The pressure detection assembly is used to detect the sampling pressure. When using the pressure measuring device, the sampler is connected to the pipeline, the sample flows into the sampler, the heating device heats the sampler, and then heats the material in the inner cavity of the sampler, and the pressure detection assembly detects the pressure.

[0017] From the above description, it can be seen that in the pressure measuring device provided in the present application, by arranging a heating device to heat the material, the situation of crystallization and blockage of low-temperature materials can be prevented, so that the pressure detection component can accurately measure the pressure in the pipeline. Therefore, the pressure measurement accuracy of the pressure measuring device provided in the present application is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 A structural schematic diagram of the working state of the pressure measuring device provided by an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a pressure measuring device provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of another pressure measuring device provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a first heating device and a sampler provided in an embodiment of the present invention; Figure 5 A schematic diagram of the structure of a second heating device and a sampler provided in an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a third heating device and a sampler provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the assembly of the sampler and the sampling tube provided in an embodiment of the present invention.

[0020] in Figure 1-7 middle: 1-sampler, 2-sampling tube, 3-sample body, 4-inlet tube, 5-nut, 6-pipeline, 7-energy storage module, 8-worm, 9-motor, 10-worm gear, 11-wire, 12-pressure detection component, 13-heating wire, 14-pressure display, 15-main pipeline, 16-heating plate. DETAILED DESCRIPTION

[0021] The core of the present invention is to provide a pressure measuring device, which has improved pressure measurement accuracy. Another core of the present invention is to provide a desulfurization and denitrification device including the pressure measuring device.

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0023] Please refer to Figures 1 to 7 .

[0024] In a specific embodiment, the pressure measurement device provided by the specific embodiment of the present invention includes a sampler 1, a heating device, a sampling tube 2 and a pressure detection assembly 12, the pipeline 6 is connected to the inner cavity of the sampler 1, and the heating device includes a heating element arranged on the outer wall of the sampler 1. The heating device can always be in a heating state.

[0025] In order to improve the convenience of using the pressure measuring device, the pressure measuring device further comprises an energy storage module 7 connected to the heating device, and the heating device is powered by the energy storage module 7 .

[0026] In order to extend the service life of the heating device, preferably, the pressure measuring device further includes a first control module and a first timing module connected to the first control module, the heating device is connected to the first control module, and the first control module controls the heating device to work for a preset time period after a preset interval. For example, the first control module controls the heating device to work for one hour, then stop working for two hours, and then start working again. Of course, the interval time and the actual working time are not limited to the above situation, and can be set as needed.

[0027] The pipeline 6 is communicated with a main pipeline 15 containing materials. Specifically, the pipeline 6 is welded to the main pipeline 15 .

[0028] The first end of the sampling tube 2 is connected to the sampler 1, and the sampling tube 2 is connected to the inner cavity. The pressure detection component 12 is installed at the second end of the sampling tube 2. The first end and the second end are opposite ends of the sampling tube 2. The pressure detection component 12 is used to detect the sampling pressure.

[0029] In order to facilitate timely reading of the sampled pressure, the pressure measuring device further comprises a pressure display 14 connected to the pressure detection assembly 12, and the pressure display 14 is connected to the pressure measurement assembly via a wire 11. The user can remotely obtain the detected sampled pressure value.

[0030] In a specific embodiment, the pressure measuring device further includes an agitator, and the agitator includes a stirring assembly arranged in the inner cavity to stir the sample in the sampler 1. By setting the agitator, a self-cleaning function in the sampler 1 is realized to reduce crystallization in the sampler 1. For example, the first control module controls the heating device to work for two hours, stop working for four hours, and then start working again. Of course, the interval time and the actual working are not limited to the above situation, and can be set as needed.

[0031] In a specific embodiment, the pressure measuring device further includes a second control module and a second timing module connected to the second control module. The agitator is connected to the second control module. The second control module controls the agitator to work for a preset time period after a preset time interval.

[0032] When the pressure measuring device is used, the sampler 1 is connected to the pipeline 6, the sample flows into the sampler 1, the stirring component of the stirrer stirs the sample in the sampler, and the pressure detection component 12 detects the pressure.

[0033] It can be seen from the above description that in the pressure measuring device provided in the specific embodiment of the present application, the stirring component is arranged in the inner cavity to stir the sample in the sampler 1, reduce crystallization, and thus enable the pressure detection component 12 to accurately measure the pressure in the pipeline 6. Therefore, the pressure measurement accuracy of the pressure measuring device provided in the present application is improved.

[0034] In a specific embodiment, the stirrer further includes a motor 9, and the stirring assembly includes a worm 8 and a worm wheel 10 drivingly connected to the output shaft of the motor 9, the worm wheel 10 is drivingly connected to the worm 8, and the worm 8 is mounted on the sampler 1 through a support, and the support is slidably connected to the worm 8. For example, a mounting hole adapted to the worm 8 is provided on the support.

[0035] In order to avoid clogging of the pipeline 6, preferably, the end of the worm 8 goes deep into the position of the pipeline 6, thereby stirring the material at the position of the pipeline 6. The axial and axial movements of the worm 8 further stir the material in the sampler 1.

[0036] In a specific embodiment, the sampler 1 includes a sampling tube 4 and a sampling body 3, and the inlet of the sampling tube 4 is connected to the pipeline 6. The sampling body 3 connects the outlet of the sampling tube 4 and the inlet of the sampling tube, and the cross-sectional area of ​​the inner cavity of the sampling tube 2 is smaller than the cross-sectional area of ​​the inner cavity of the sampling body 3 along the direction perpendicular to the material flow in the sampler 1.

[0037] In a specific embodiment, the sample inlet tube 4 is detachably connected to the pipeline 6 via a fastener. Specifically, the fastener may be a buckle, and the sample inlet tube 4 is connected to the pipeline 6 via the buckle. At this time, the pressure measuring device can dock samples at different measuring points, thereby improving the versatility of the pressure measuring device.

[0038] In a specific embodiment, the fastener includes a nut 5 fixedly connected to the pipeline 6 and an external thread arranged on the outer circumference of the injection tube 4, and the injection tube 4 is threadedly connected to the nut 5. When it is needed to be used, the injection tube 4 is rotated so that the injection tube 4 is threadedly connected to the nut 5, thereby realizing a simple and convenient installation operation of the sampler 1.

[0039] In another specific embodiment, the fastener includes a first flange, a second flange and a fastener, the first flange is arranged at the outer periphery of the end of the pipeline 6, and the second flange is arranged at the outer periphery of the end of the injection tube 4. The first flange and the second flange are locked by a circumferentially arranged fastener. The fastener can be a bolt, and the bolt is arranged circumferentially around the first flange and the second flange to improve the connection stability.

[0040] In order to improve assembly efficiency, the first flange is integrally formed with the pipeline 6 , and the second flange is integrally formed with the end of the sample injection tube 4 .

[0041] In a specific embodiment, the sampling tube 4 is connected to the bottom end of the sampling body 3, and the bottom end of the inner cavity of the sampling body 3 is a tapered cavity that gradually expands upward. Specifically, the bottom end of the inner cavity of the sampling body 3 is a conical structure that gradually expands upward.

[0042] In a specific embodiment, the heating element is a heating plate 16 disposed on the outer wall of the sampler 1. Specifically, the heating plates 16 are sequentially disposed around the outer circumference of the sampler 1, and adjacent heating plates 16 are disposed in series or in parallel.

[0043] Of course, the heating element may also be a heating wire 13 disposed on the outer wall of the sampler 1 . Specifically, the heating wire 13 is wound around the outer wall of the sampler 1 .

[0044] like Figure 5 As shown, in order to prevent crystallization of the sample in the sampler 1 , preferably, the heating element extends to the inlet position of the sampler 1 , for example, the heating wire is wound to the inlet position of the sampler 1 .

[0045] When the sampler 1 is made of corrosion-resistant metal, an insulating structure is provided on the outer wall of the heating element to improve the safety of the pressure measuring device.

[0046] In order to further extend the service life of the sampler, preferably, the inner wall of the sample body 3 is provided with an anti-corrosion layer.

[0047] The present application provides a desulfurization and denitrification device, including a pressure measuring device, wherein the pressure measuring device is any of the above-mentioned pressure measuring devices. The above-mentioned specific structure of the pressure measuring device is described, and the present application includes the above-mentioned pressure measuring device and also has the above-mentioned technical effects.

[0048] In the description of the invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0049] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0050] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pressure measuring device, characterized in that: include: A sampler (1), wherein the inner cavity of the sampler (1) is connected to the pipeline (6); A heating device, the heating device comprising a heating element arranged on the outer wall of the sampler (1); A sampling tube (2), wherein a first end of the sampling tube (2) is connected to the sampler (1), and the sampling tube (2) is in communication with the inner cavity; A pressure detection component (12), the pressure detection component (12) being installed at the second end of the sampling tube (2), the first end and the second end being opposite ends of the sampling tube (2), and the pressure detection component (12) being used to detect sampling pressure.

2. The pressure measuring device according to claim 1, characterized in that: Also included is a stirrer, the stirrer comprising: Motor (9); A stirring assembly is arranged in the inner cavity to stir the sample in the sampler (1), the stirring assembly comprising a worm (8) and a worm wheel (10) drivingly connected to the output shaft of the motor (9), the worm wheel (10) drivingly connected to the worm (8), the worm (8) being mounted on the sampler (1) via a support, and the support being slidably connected to the worm (8).

3. The pressure measuring device according to claim 2, characterized in that: Also includes: A second control module; The second timing module is connected to the second control module, the stirrer is connected to the second control module, and the second control module controls the stirrer to work for a preset time period after a preset time interval.

4. The pressure measuring device according to claim 1, characterized in that: The sampler (1) comprises: A sampling tube (4), the inlet of which is connected to a pipeline (6); A sampling body (3) is connected to the outlet of the sampling tube (4) and the inlet of the sampling tube, and the cross-sectional area of ​​the inner cavity of the sampling tube (2) is smaller than the cross-sectional area of ​​the inner cavity of the sampling body (3) along the direction perpendicular to the material flow in the sampler (1).

5. The pressure measuring device according to claim 4, characterized in that: The sample injection tube (4) is detachably connected to the pipeline (6) via a fastener, wherein the fastener comprises a nut (5) fixedly connected to the pipeline (6) and an external thread arranged on the outer circumference of the sample injection tube (4), and the sample injection tube (4) is threadedly connected to the nut (5).

6. The pressure measuring device according to claim 4, characterized in that: The fastener comprises: A first flange, the first flange being arranged on the outer periphery of an end portion of the pipeline (6); A second flange, the second flange being arranged on the outer periphery of the end of the sample injection tube (4); Fasteners, the first flange and the second flange are locked by fasteners arranged circumferentially.

7. The pressure measuring device according to claim 3, characterized in that: The sampling tube (4) is connected to the bottom end of the sampling body (3), and the bottom end of the inner cavity of the sampling body (3) is a conical cavity that gradually expands upwards.

8. The pressure measuring device according to claim 1, characterized in that: The heating element is also comprised of a heating plate (16) or a heating wire (13) arranged on the outer wall of the sampler (1).

9. The pressure measuring device according to claim 1, characterized in that: Also includes: a first control module; A first timing module, wherein the first timing module is connected to the first control module, the heating device is connected to the first control module, and the first control module controls the heating device to work for a preset time period after a preset time interval.

10. A desulfurization and denitrification device, comprising a pressure measuring device, characterized in that: The pressure measuring device is the pressure measuring device according to any one of claims 1 to 9.

Images