A kind of ammonia injection impurity dredging device of denitration system

Abstract

The present application relates to the technical field of denitration system, particularly relates to a kind of ammonia injection impurity dredging device of denitration system.The present application includes: flange, flange is 2, and 2 flanges are mutually parallel arrangement;Straight pipe section, the two ends of straight pipe section are respectively fixedly connected with the one end surface of 2 flanges, and the center of the two ends of straight pipe section is respectively coincident with the center of 2 flanges arrangement;Screw hole is set on flange, screw hole is 4, and 4 screw holes are symmetrically distributed on flange.Detection unit is used to detect the volume V of ammonia gas in real time;Control unit is used to control the telescopic of straight pipe section according to the volume V of ammonia gas, to control the real-time length of straight pipe section.The 45° bevel of the center of flange is opened outward, the speed of ammonia gas entering dredging device is increased, so that medium can quickly pass through dredging device, and then the effect of quickly cleaning large particle impurities in medium is achieved, and the dredging of denitration pipeline is more thorough.

Description

Technical Field

[0001] This invention relates to the field of denitrification system technology, and in particular to a device for clearing impurities from ammonia injection in a denitrification system. Background Technology

[0002] Thermal power plants generate large amounts of sulfur- and nitrate-containing waste gases from burning coal. These gases, when released into the atmosphere, contribute to pollution and acid rain. Desulfurization and denitrification equipment in thermal power plants is used to treat these waste gases containing high levels of sulfur and nitrates. Currently, the main denitrification processes are flue gas denitrification (FGD) and selective catalytic reduction (SCR) denitrification. Common FGD processes can be broadly classified into three categories: dry, semi-dry, and wet. Dry methods include selective non-catalytic reduction (SNR), selective catalytic reduction (SCR), and electron beam combined desulfurization and denitrification. Semi-dry methods include activated carbon combined desulfurization and denitrification. Wet methods include ozone oxidation absorption. SCR units mainly consist of a denitrification reagent preparation system and a reactor body. By injecting the denitrification reagent NH3 into the reactor, NOx is reduced to nitrogen gas.

[0003] However, in existing technologies, the denitrification flow meter is a crucial component of the denitrification system. It is used on the denitrification system pipelines and is the sole source of data for monitoring ammonia usage. Due to the small pipe diameter of the flow meter, it is prone to clogging or measurement inaccuracies over time. Furthermore, after each disassembly and reassembly, impurities from the pipeline are flushed into the flow meter, requiring repeated disassembly and reassembly to thoroughly clean the impurities before the denitrification flow meter. This process is time-consuming, labor-intensive, and carries inherent risks. Therefore, providing a device for clearing ammonia impurities from a denitrification system is a pressing technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0004] The purpose of this invention is to provide an ammonia impurity clearing device for a denitrification system. This invention increases the speed at which ammonia enters the clearing device by opening a 45° bevel at the center of the flange, allowing the medium to pass through the clearing device quickly, thereby achieving the effect of rapidly cleaning large particulate impurities in the medium and making the clearing of denitrification pipelines more thorough.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A device for clearing impurities from ammonia injection in a denitrification system, comprising:

[0007] The flanges are two in number and are arranged in parallel to each other.

[0008] A straight pipe section, wherein both ends of the straight pipe section are fixedly connected to one end face of two flanges, and the center of the two ends of the straight pipe section coincides with the center of the two flanges respectively;

[0009] The flange plate is provided with screw holes, the screw holes are four, and the four screw holes are symmetrically distributed on the flange plate.

[0010] In some embodiments of the present application, the straight pipe section is hollow, and the straight pipe section is telescopic, the outer diameter of the straight pipe section is 28mm, the inner diameter of the straight pipe section is 20mm, the wall thickness of the hollow straight pipe section is 4mm, and the maximum length of the straight pipe section is 410mm.

[0011] In some embodiments of the present application, the flange plate is also provided with bevels, the bevels are two, and the two bevels are respectively arranged close to one end surface of the hollow straight pipe section, and the included angle between the bevel and the end surface of the straight pipe section is 45°.

[0012] In some embodiments of the present application, the method further comprises:

[0013] The detection unit is used for detecting the volume V of ammonia in real time;

[0014] The control unit is used for controlling the telescopic straight pipe section according to the volume V of ammonia to control the real-time length of the straight pipe section;

[0015] The controller is provided with a preset ammonia volume matrix T0 and a preset straight pipe section length matrix A, for the preset straight pipe section length matrix A, A (A1, A2, A3, A4) is set, wherein A1 is the first preset straight pipe section length, A2 is the second preset straight pipe section length, A3 is the third preset straight pipe section length, and A4 is the fourth preset straight pipe section length, and A1

[0016] According to the relationship between V and the preset ammonia volume matrix T0, the corresponding straight pipe section length is selected as the real-time length of the straight pipe section;

[0017] When V

[0018] When T01≤V

[0019] When T02≤V

[0020] When T03≤V<T04, the fourth preset straight pipe segment length A4 is selected as the real-time length of the straight pipe segment.

[0021] In some embodiments of the present application, the detection unit is further configured to detect the density U of the impurities in real time.

[0022] The control unit is further configured to control the straight pipe segment to stretch or contract according to the density U of the impurities, so as to correct the real-time length.

[0023] The controller further comprises a preset impurity density matrix Z0 and a preset straight pipe segment length correction coefficient matrix E. For the preset straight pipe segment length correction coefficient matrix E, E (E1, E2, E3, E4) is set, wherein E1 is the first preset straight pipe segment length correction coefficient, E2 is the second preset straight pipe segment length correction coefficient, E3 is the third preset straight pipe segment length correction coefficient, and E4 is the fourth preset straight pipe segment length correction coefficient, and 1<E1<E2<E3<E4<1.2. For the preset impurity density matrix Z0, Z0 (Z01, Z02, Z03, Z04) is set, wherein Z01 is the first preset impurity density, Z02 is the second preset impurity density, Z03 is the third preset impurity density, and Z04 is the fourth preset impurity density, and Z01<Z02<Z03<Z04.

[0024] According to the relationship between U and the preset impurity density matrix Z0, a corresponding correction coefficient is selected to correct the real-time length.

[0025] When U<Z01, the first preset straight pipe segment length correction coefficient E1 is selected to correct the first preset straight pipe segment length A1, and the corrected straight pipe segment length is A1*E1.

[0026] When Z01≤U<Z02, the second preset straight pipe segment length correction coefficient E2 is selected to correct the second preset straight pipe segment length A2, and the corrected straight pipe segment length is A2*E2.

[0027] When Z02≤U<Z03, the third preset straight pipe segment length correction coefficient E3 is selected to correct the third preset straight pipe segment length A3, and the corrected straight pipe segment length is A3*E3.

[0028] When Z03≤U<Z04, the fourth preset straight pipe segment length correction coefficient E4 is selected to correct the fourth preset straight pipe segment length A4, and the corrected straight pipe segment length is A4*E4.

[0029] In some embodiments of the present application, the diameter of the four screw holes is 12 mm.

[0030] In some embodiments of the present application, the thickness of the two flanges is 12mm.

[0031] In some embodiments of the present application, the diameter of the two flanges is 120mm.

[0032] In some embodiments of the present application, the center of the four screw holes is 39mm away from the center of the flange, and 21mm away from the edge of the flange.

[0033] In some embodiments of the present application, the material of the flange and the straight pipe segment is stainless steel.

[0034] The present application provides a denitration system ammonia injection impurity dredging device, which has the beneficial effects compared with the prior art:

[0035] The present application designs two stainless steel flanges with a diameter of 120mm and a thickness of 12mm, and a stainless steel straight pipe segment with a length of 410mm, an outer diameter of 24mm and an inner diameter of 20mm. The flange has four 12mm screw holes symmetrically distributed on it, and the center of the flange has a 45° bevel outward, which can effectively increase the speed of ammonia gas entering the dredging device, so that the medium can quickly pass through the dredging device, achieving the effect of quickly cleaning large particle impurities in the medium, and making the denitration pipeline dredging more thorough. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a structural schematic diagram of the denitration system ammonia injection impurity dredging device in the embodiment of the present application;

[0037] Figure 2 is a top view of the denitration system ammonia injection impurity dredging device in the embodiment of the present application;

[0038] Figure 3 is a system function block diagram of the ammonia injection impurity dredging device in the embodiment of the present application.

[0039] In the figure: 1, flange; 2, bevel; 3, straight pipe segment; 4, screw hole; 5, outer diameter; 6, inner diameter; 7, flange edge; 8, detection unit; 9, control unit. DETAILED DESCRIPTION

[0040] The specific embodiments of the present application will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0041] In the description of the present application, it needs to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application 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 limiting the present application.

[0042] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0043] In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection, it can be mechanical connection, or electrical connection, it can be direct connection, or indirect connection through intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In the prior art, the denitration flowmeter is an important part of the denitration system, which is used on the pipeline of the denitration system and is the only data for monitoring the ammonia consumption. Due to the small diameter of the flowmeter, the denitration flowmeter is easy to be blocked or the measurement accuracy is deviated with the accumulation of time. Moreover, after each disassembly, the impurities in the pipeline flow into the flowmeter, and the flowmeter needs to be repeatedly disassembled several times to completely clean the impurities in front of the denitration flowmeter, which is time-consuming and laborious, and there is a certain risk in each disassembly.

[0045] Therefore, the present application provides a denitration system ammonia injection impurity dredging device, which is characterized in that a 45° bevel is formed in the center of the flange plate to increase the speed of ammonia entering the dredging device, so that the medium can quickly pass through the dredging device, thereby achieving the effect of quickly cleaning the large particle impurities in the medium, and making the denitration pipeline dredging more thorough.

[0046] Referring to Figure 1 The disclosed embodiments of the present application provide a denitration system ammonia injection impurity dredging device, which comprises:

[0047] The flange plate 1 is 2, and the two flange plates 1 are arranged in parallel;

[0048] The straight pipe section 3 is fixedly connected to one end face of two flanges 1 respectively, and the centers of the two ends of the straight pipe section 3 are respectively arranged to coincide with the centers of the two flanges 1;

[0049] The flange 1 is provided with screw holes 4, and the four screw holes 4 are symmetrically distributed on the flange 1.

[0050] In an embodiment of the present application, the straight pipe section 3 is hollow, and the straight pipe section 3 is telescopic, the outer diameter 5 of the straight pipe section 3 is 28mm, the inner diameter 6 of the straight pipe section 3 is 20mm, the wall thickness of the hollow straight pipe section 3 is 4mm, and the maximum length of the straight pipe section 3 is 410mm.

[0051] In an embodiment of the present application, the flange 1 is further provided with bevels 2, and the two bevels 2 are respectively arranged close to one end face of the hollow straight pipe section 3, and the included angle between the bevel 2 and the end face of the straight pipe section 3 is 45°.

[0052] In an embodiment of the present application, further comprising:

[0053] The detection unit 8 is used for detecting the volume V of the ammonia gas in real time;

[0054] The control unit 9 is used for controlling the telescopic straight pipe section 3 according to the volume V of the ammonia gas, so as to control the real-time length of the straight pipe section 3.

[0055] The controller is provided with a preset ammonia gas volume matrix T0 and a preset straight pipe section 3 length matrix A, for the preset straight pipe section 3 length matrix A, A(A1, A2, A3, A4) is set, wherein A1 is the first preset straight pipe section 3 length, A2 is the second preset straight pipe section 3 length, A3 is the third preset straight pipe section 3 length, and A4 is the fourth preset straight pipe section 3 length, and A1

[0056] According to the relationship between V and the preset ammonia gas volume matrix T0, the corresponding straight pipe section 3 length is selected as the real-time length of the straight pipe section 3;

[0057] When V

[0058] When T01≤V

[0059] When T02≤V<T03, the third preset length A3 of the straight pipe section 3 is selected as the real-time length of the straight pipe section 3;

[0060] When T03≤V<T04, the fourth preset length A4 of the straight pipe section 3 is selected as the real-time length of the straight pipe section 3.

[0061] In an embodiment of the present application, the detection unit 8 is further configured to detect the density U of the impurities in real time.

[0062] The control unit 9 is further configured to control the straight pipe section 3 to stretch or contract according to the density U of the impurities to correct the real-time length.

[0063] The controller is further provided with a preset impurity density matrix Z0 and a preset length correction coefficient matrix E of the straight pipe section 3. For the preset length correction coefficient matrix E of the straight pipe section 3, E (E1, E2, E3, E4) is set, wherein E1 is the first preset length correction coefficient of the straight pipe section 3, E2 is the second preset length correction coefficient of the straight pipe section 3, E3 is the third preset length correction coefficient of the straight pipe section 3, and E4 is the fourth preset length correction coefficient of the straight pipe section 3, and 1<E1<E2<E3<E4<1.2. For the preset impurity density matrix Z0, Z0 (Z01, Z02, Z03, Z04) is set, wherein Z01 is the first preset impurity density, Z02 is the second preset impurity density, Z03 is the third preset impurity density, and Z04 is the fourth preset impurity density, and Z01<Z02<Z03<Z04.

[0064] The corresponding correction coefficient is selected according to the relationship between U and the preset impurity density matrix Z0 to correct the real-time length.

[0065] When U<Z01, the first preset length correction coefficient E1 of the straight pipe section 3 is selected to correct the first preset length A1 of the straight pipe section 3, and the corrected length of the straight pipe section 3 is A1*E1.

[0066] When Z01≤U<Z02, the second preset length correction coefficient E2 of the straight pipe section 3 is selected to correct the second preset length A2 of the straight pipe section 3, and the corrected length of the straight pipe section 3 is A2*E2.

[0067] When Z02≤U<Z03, the third preset length correction coefficient E3 of the straight pipe section 3 is selected to correct the third preset length A3 of the straight pipe section 3, and the corrected length of the straight pipe section 3 is A3*E3.

[0068] When Z03≤U<Z04, the fourth preset length correction coefficient E4 of the straight pipe section 3 is selected to correct the fourth preset length A4 of the straight pipe section 3, and the corrected length of the straight pipe section 3 is A4*E4.

[0069] In an embodiment of the present application, the diameter of the four screw holes 4 is 12mm.

[0070] In an embodiment of the present application, the thickness of the two flanges 1 is 12mm.

[0071] In an embodiment of the present application, the diameter of the two flanges 1 is 120mm.

[0072] In an embodiment of the present application, the distance between the center of the four screw holes 4 and the center of the flange 1 is 39mm, and the distance between the center of the four screw holes 4 and the edge of the flange 1 is 21mm.

[0073] In an embodiment of the present application, the material of the flange 1 and the straight pipe segment 3 is stainless steel.

[0074] Referring to Figure 2 As shown in the figure, the flange is provided with four screw holes, and the four screw holes are symmetrically distributed on the flange, the diameter of the four screw holes is 12mm, the thickness of the two flanges is 12mm, the diameter of the two flanges is 120mm, the distance between the center of the four screw holes and the center of the flange is 39mm, and the distance between the center of the four screw holes and the edge of the flange is 21mm. The working principle is to increase the speed of ammonia entering the dredging device through the four screw holes, so that the medium can quickly pass through the dredging device, and the effect of quickly cleaning large particle impurities in the medium is achieved.

[0075] Referring to Figure 3 As shown in the figure, the system function block diagram of the ammonia injection impurity dredging device, the detection unit is used for real-time detection of the volume V of ammonia, the control unit is used for controlling the straight pipe segment to stretch and shrink according to the volume V of ammonia, so as to control the real-time length of the straight pipe segment, the detection unit is also used for real-time detection of the density U of impurities, and the control unit is also used for controlling the straight pipe segment to stretch and shrink according to the density U of impurities, so as to correct the real-time length, and the working principle is to control the straight pipe segment to stretch and shrink according to different amounts of ammonia volume, and as the volume of ammonia increases, the straight pipe segment is lengthened and the speed of ammonia entering the dredging device is increased, so that the medium can quickly pass through the dredging device, and when the volume of ammonia is small, the length of the straight pipe segment is shortened, so that the operation is simple and convenient.

[0076] In summary, the flange and the straight pipe segment of the present application are made of stainless steel, the center of the flange is provided with a 45° bevel, the speed of ammonia entering the dredging device is increased, the medium can quickly pass through the dredging device, the effect of quickly cleaning large particle impurities in the medium is achieved, and the dredging of the denitration pipeline is more thorough.

[0077] The above merely illustrates one embodiment of the present application, but cannot limit the scope of the present application, and any structural changes made according to the present application, as long as the essence of the present application is not lost, should be considered to fall within the scope of the present application.

[0078] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system and the related description described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0079] It should be noted that the system provided by the above embodiments is only exemplified by the division of the above functional modules, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the modules or steps in the embodiments of the present application are further decomposed or combined, for example, the modules of the above embodiments can be combined into one module, or can be further split into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present application are only for distinguishing the respective modules and steps, and should not be considered as an improper limitation of the present application.

[0080] Those skilled in the art should be aware that the modules and method steps of each example described in connection with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. The software modules and method steps corresponding to the programs can be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In order to clearly illustrate the interchangeability of electronic hardware and software, the components and steps of each example have been described in the above description in general terms. Whether the functions are performed by electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0081] The term "comprising" or any other similar word is intended to cover non-exclusive inclusion, so that the process, method, article or device / apparatus including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to the process, method, article or device / apparatus.

[0082] The technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical schemes after the changes or replacements will all fall within the protection scope of the present application.

[0083] The above merely describes the preferred embodiments of the present application, but is not used to limit the protection scope of the present application.

Claims

1. An ammonia injection impurity dredging device for a denitration system, characterized in that, It includes: Flange, 2, and 2 said flange parallel to each other; Straight pipe section, both ends of the straight pipe section are respectively fixedly connected to one end surface of two said flanges, and the centers of the two ends of the straight pipe section are respectively arranged to coincide with the centers of two said flanges; Screw holes are provided on the flange, the screw holes are four, and the four screw holes are symmetrically distributed on the flange; The straight pipe section is hollow, and the straight pipe section is telescopic, the outer diameter of the straight pipe section is 28mm, the inner diameter of the straight pipe section is 20mm, the wall thickness of the hollow straight pipe section is 4mm, and the maximum length of the straight pipe section is 410mm; It also includes: Detection unit, said detection unit is used for real-time detection of the volume of ammonia gas V; Control unit, said control unit is used for controlling the telescopic of said straight pipe section according to the volume of ammonia gas V, to control the real-time length of said straight pipe section; The control unit is provided with a preset ammonia gas volume matrix T0 and a preset straight pipe section length matrix A, for said preset straight pipe section length matrix A, set A(A1, A2, A3, A4), wherein A1 is the first preset straight pipe section length, A2 is the second preset straight pipe section length, A3 is the third preset straight pipe section length, A4 is the fourth preset straight pipe section length, and A1 According to the relationship between V and the preset ammonia gas volume matrix T0, the corresponding straight pipe section length is selected as the real-time length of the straight pipe section; When V When T01≤V When T02≤V When T03≤V When T03≤V 2. The ammonia injection device for the denitration system according to claim 1, wherein: The flange is also provided with a bevel, the bevel is two, and two said bevels are respectively arranged close to one end surface of the hollow straight pipe section, and the included angle between the bevel and the end surface of the straight pipe section is 45°.

3. The ammonia injection device for the denitration system according to claim 1, wherein: The detection unit is also used for real-time detection of the density of impurities U; The control unit is also used for controlling the telescopic of said straight pipe section according to the density of impurities U, to correct said real-time length; The control unit is also provided with a preset impurity density matrix Z0 and a preset straight pipe segment length correction coefficient matrix E, wherein E (E1, E2, E3, E4) is set for the preset straight pipe segment length correction coefficient matrix E, E1 is a first preset straight pipe segment length correction coefficient, E2 is a second preset straight pipe segment length correction coefficient, E3 is a third preset straight pipe segment length correction coefficient, E4 is a fourth preset straight pipe segment length correction coefficient, and 1 A corresponding correction coefficient is selected according to the relationship between U and the preset impurity density matrix Z0 to correct the real-time length; When U < Z01, the first preset straight pipe segment length correction coefficient E1 is selected to correct the first preset straight pipe segment length A1, and the corrected straight pipe segment length is A1*E1; When Z01≤U < Z02, the second preset straight pipe segment length correction coefficient E2 is selected to correct the second preset straight pipe segment length A2, and the corrected straight pipe segment length is A2*E2; When Z02≤U < Z03, the third preset straight pipe segment length correction coefficient E3 is selected to correct the third preset straight pipe segment length A3, and the corrected straight pipe segment length is A3*E3; When Z03≤U < Z04, the fourth preset straight pipe segment length correction coefficient E4 is selected to correct the fourth preset straight pipe segment length A4, and the corrected straight pipe segment length is A4*E4.

4. The ammonia injection grid of claim 1, wherein, The diameter of the four screw holes is 12 mm.

5. The ammonia injection grid of claim 1, wherein, The thickness of the two flange plates is 12 mm.

6. The ammonia injection grid of claim 1, wherein, The diameter of the two flange plates is 120 mm.

7. The ammonia injection grid of claim 1, wherein, The distance between the centers of the four screw holes and the center of the flange plate is 39 mm, and the distance between the centers of the four screw holes and the edge of the flange plate is 21 mm.

8. The ammonia injection grid of claim 1, wherein, The material of the flange plate and the straight pipe segment is stainless steel.

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