Negative-pressure online unblocking sampler for outlet of secondary combustion chamber

Abstract

The utility model relates to a secondary combustion chamber outlet negative pressure on-line unblocking sampler, which belongs to the field of environmental protection technology and industrial equipment design, and comprises a pressure drawing sampling pipe assembly, and one side of the pressure drawing sampling pipe assembly is connected with an unblocking sampling pipe kit; the secondary combustion chamber outlet negative pressure on-line unblocking sampler solves the problem that on-line sampling and on-line unblocking are achieved by developing the secondary combustion chamber outlet negative pressure on-line unblocking sampler.

Description

Technical Field

[0001] The utility model relates to a negative pressure online clearing and blocking sampler for a secondary combustion chamber outlet, belonging to the field of environmental protection technology and industrial equipment design. Background Art

[0002] The secondary combustion chamber is a piece of equipment in a hazardous waste incinerator, which ensures that organic matter and combustible gases are fully burned in the secondary combustion chamber. The flue gas temperature at the secondary combustion chamber outlet is greater than 1100°C, and the flue gas stays in the high temperature zone for more than 2 seconds, ensuring that harmful components in the flue gas, including dioxins, are completely decomposed and meet the national requirements for hazardous waste incineration. The high-temperature flue gas incinerated in the secondary combustion chamber has high viscosity, and the fly ash in the flue gas will adhere to the inner surface of the secondary combustion chamber. The fly ash continues to burn under the high-temperature flue gas. When the melting point of the fly ash is low, a molten material will be formed, resulting in severe coking, which will cause the negative pressure sampling tube at the outlet of the secondary combustion chamber to be blocked.

[0003] According to the new type of plug clearer disclosed in Chinese utility model patent CN204112295U, the utility model relates to a new type of plug clearer, which includes a trunk, one end of which is connected to an operating handle, and the other end is provided with a threaded connection port which is threadedly connected to a plug clearing head, and a sealing device is sleeved on the trunk; the sealing device includes an outer sealing round steel and an inner sealing round steel, wherein the inner and outer sealing round steels are connected by threaded matching; the inner sealing round steel is drilled in the center, and three O-ring grooves are provided in the hole, and three O-rings are placed therein; the plug clearing head includes a conical plug clearing head, a spherical plug clearing head and a round toothed plug clearing head. The plug clearing head described in the utility model is threadedly connected to the trunk, and the plug clearing head can be easily replaced according to the type of garbage to be cleaned; and during the cleaning process, the turbine generator set can be operated without stopping for maintenance.

[0004] The original pressure-inducing pipe is a slender conduit, which is directly welded to the outer wall of the second combustion chamber, with a flange plate in the middle connected by bolts. It needs to be cleaned regularly. Each time it is cleaned, the central control personnel need to release the interlock, and the on-site personnel need to open the connecting flange to clean it. The coke is hard and firm, and using wind pressure or cylinder striker to clear the blockage will not achieve good results. If it is not cleaned in time, it will cause inaccurate negative pressure detection and a chain alarm, which will directly affect the normal production of the incinerator system.

[0005] It is necessary to prevent high-temperature flue gas from escaping from the sampling tube to avoid harm to personnel. At the same time, it is necessary to avoid damage to the sampler due to the high temperature inside and outside the secondary combustion chamber. Utility Model Content

[0006] The technical problem to be solved by the utility model is that it is necessary to develop a negative pressure online clearing and plugging sampler for a secondary combustion chamber outlet to realize online sampling and online clearing and plugging.

[0007] The utility model discloses a negative pressure online clearing sampler for a secondary combustion chamber outlet, which comprises a pressure-drawing sampling tube assembly, and one side of the pressure-drawing sampling tube assembly is connected to a clearing sampling tube set.

[0008] The pressure sampling tube assembly serves to connect the pressure transmitter, and the unblocking sampling tube kit is used to clear the pressure sampling tube assembly to avoid blockage.

[0009] Furthermore, the pressure sampling tube assembly includes a sampling tube, one side of the sampling tube is connected to the flange I, a pressure tube is vertically arranged on the outer wall of the sampling tube, and the pressure tube is connected to the sampling tube.

[0010] The sampling tube serves to connect the pressure transmitter, and the flange I is used to connect the unblocking sampling tube kit; it passes through the sampling tube, the sampling cavity, and the pressure pipe to the external pressure transmitter.

[0011] Further, the plugging-clearing sampling tube kit includes a flange assembly, a double inner-thread tube, and a single-thread plug sleeve assembly connected in sequence;

[0012] The flange assembly includes a flange I and a single-wire plug I, and the single-wire plug I is connected to the single-wire plug sleeve assembly through a double inner thread tube;

[0013] It also includes a clearing needle, which penetrates the flange assembly, the double inner wire tube and the single wire plug cover assembly, and a handle is provided at the end of the clearing needle;

[0014] An anti-dropping gasket is provided in the middle of the clearing needle near the monofilament plug, and a spring is provided on the left side of the anti-dropping gasket;

[0015] The other end of the spring contacts the single-wire plug Ⅰ.

[0016] The flange plate I is connected to one end of the double inner thread tube through the single thread plug I, and the other end of the double inner thread tube is connected to the single thread plug sleeve assembly;

[0017] The clearing needle is used to clear the impurities accumulated at the sampling tube mouth, and the handle is used for the operator to hold it, so as to control the clearing needle to extend and retract, thereby clearing the impurities at the sampling tube mouth;

[0018] The other end of the spring contacts the single-wire plug I, which is used for the rebound of the plugging removal needle after compression.

[0019] Furthermore, the single-wire plug sleeve assembly includes a single-wire plug II and a sealing sleeve, a single-wire plug III is provided on the other side of the sealing sleeve, and the sealing sleeve and the single-wire plug III are connected by threads.

[0020] The single-wire plug II and the sealing sleeve are fixed by welding, and the single-wire plug III and the sealing sleeve are connected by threads, so as to facilitate disassembly and installation.

[0021] Furthermore, the clearing needle comprises a clearing section and a guide section.

[0022] The clearing section can extend into the sampling tube during the compression stroke and cooperate with the sampling tube to clear impurities.

[0023] Furthermore, both ends of the double inner thread tube are provided with inner threads;

[0024] Also included are two polytetrafluoroethylene gaskets, which are located at both ends of the spring.

[0025] The internal threads at both ends of the double internal thread tube are connected to the single-wire plug I and the single-wire plug II respectively, which is convenient for the later disassembly and maintenance of the overall structure;

[0026] The PTFE sealing gaskets are respectively located at both ends of the spring, and the single-wire plug I and the single-wire plug II are tightened on both sides of the double inner thread tube to achieve a better sealing effect.

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] The utility model discloses an online negative pressure clearing sampler for the outlet of a secondary combustion chamber, which changes the original sampling method, opens a hole on the steel plate at the outlet of the secondary combustion chamber, welds a stainless steel short tube, welds a pressure-leading tube to the upper middle of the sampling tube to an external pressure transmitter, welds a flange plate I at the other end of the sampling tube, and installs a clearing sampling tube kit on the flange plate I. The clearing needle is pushed forward by a handle, and the elastic force of a spring is used to move the clearing needle forward to clean the coke at the tube mouth of the sampling tube; the handle is released, and the spring drives the clearing needle to automatically return, thereby avoiding damage to the clearing needle due to the high temperature inside the secondary combustion chamber; polytetrafluoroethylene sealing pads are installed on the clearing needle, which are located at both ends of the spring and at the rear end of the fixed spring, thereby achieving a good sealing effect; online clearing operation is realized, which saves time and effort, is safe and efficient, ensures the accuracy of the negative pressure measurement at the outlet of the secondary combustion chamber, and provides a reliable basis for production; high-temperature flue gas from emitting from the traditional sampler is avoided to cause harm to personnel, and damage to the sampler due to the high temperature inside and outside the secondary combustion chamber is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional diagram of an embodiment of the utility model;

[0030] Figure 2 It is an exploded view of an embodiment of the utility model;

[0031] Figure 3 It is a left side view of an embodiment of the utility model;

[0032] Figure 4 yes Figure 3 Full section view at AA in the middle;

[0033] In the figure: 1. Pressure sampling tube assembly; 2. Blockage removal sampling tube kit;

[0034] 11. Sampling tube; 12. Flange I; 13. Pressure pipe;

[0035] 21. Flange assembly; 22. Double inner thread tube; 23. Single thread plug sleeve assembly; 24. Clearing needle; 25. Spring; 26. PTFE sealing gasket;

[0036] 211, flange II; 212, single wire plug I;

[0037] 231, single-wire plug II; 232, sealing sleeve; 233, single-wire plug III;

[0038] 241. handle; 242. anti-drop gasket; 243. clearing section; 244. guide section;

[0039] 2441. Sampling cavity. DETAILED DESCRIPTION

[0040] Example 1

[0041] like Figure 1 to Figure 4 As shown, a negative pressure online clearing sampler for a secondary combustion chamber outlet described in the utility model comprises a pressure sampling tube assembly 1, and one side of the pressure sampling tube assembly 1 is connected to a clearing sampling tube kit 2.

[0042] The pressure sampling tube assembly 1 serves to connect the pressure transmitter, and the unblocking sampling tube kit 2 is used to clear the pressure sampling tube assembly 1 to avoid blockage.

[0043] like Figure 2 and Figure 4 As shown, as an optimization, the pressure sampling tube assembly 1 includes a sampling tube 11 , one side of the sampling tube 11 is connected to a flange plate Ⅰ 12 , a pressure tube 13 is vertically provided on the outer wall of the sampling tube 11 , and the pressure tube 13 is connected to the sampling tube 11 .

[0044] The sampling tube 11 serves to connect the pressure transmitter, and the flange plate I 12 is used to connect the unblocking sampling tube kit 2; the sampling tube 11 passes through the pressure-leading tube 13 to the external pressure transmitter.

[0045] like Figure 2 As shown, as an optimization, the clearing sampling tube kit 2 includes a flange assembly 21, a double inner wire tube 22 and a single wire plug sleeve assembly 23 connected in sequence;

[0046] The flange assembly 21 includes a flange II 211 and a single-wire plug I 212 , and the single-wire plug I 212 is connected to the single-wire plug sleeve assembly 23 through a double inner wire tube 22 ;

[0047] The blockage clearing needle 24 is also included. The blockage clearing needle 24 is arranged through the flange assembly 21, the double inner wire tube 22 and the single wire plug cover assembly 23. The end of the blockage clearing needle 24 is provided with a handle 241;

[0048] An anti-dropping gasket 242 is provided in the middle of the plugging needle 24 near the monofilament plug, and a spring 25 is provided on the left side of the anti-dropping gasket 242;

[0049] The other end of the spring 25 contacts the single-wire plug Ⅰ212.

[0050] The flange II 211 is connected to one end of the double inner wire tube 22 through the single wire plug I 212, and the other end of the double inner wire tube 22 is connected to the single wire plug sleeve assembly 23;

[0051] The clearing needle 24 is used to clear the accumulated coke in the sampling tube 11, and the handle 241 is used for the operator to hold it, so as to control the clearing needle 24 to extend and retract, thereby clearing the impurities in the sampling tube 11;

[0052] The spring 25 is used for rebounding of the blockage clearing needle 24 after being compressed.

[0053] like Figure 2 As shown, as an optimization, the single-wire plug sleeve assembly 23 includes a single-wire plug II 231 and a sealing sleeve 232, a single-wire plug III 233 is provided on the other side of the sealing sleeve 232, and the sealing sleeve 232 and the single-wire plug III 233 are connected by threads.

[0054] The single-wire plug II 231 and the sealing sleeve 232 are fixed by welding, and the single-wire plug III 233 and the sealing sleeve 232 are connected by threads, so as to facilitate disassembly and installation.

[0055] like Figure 2 and Figure 4 As shown, as an optimization, the clearing needle 24 includes a clearing section 243 and a guide section 244 . The diameter of the clearing section 243 is smaller than that of the guide section 244 . The clearing section 243 is provided with a sampling cavity 2441 .

[0056] The clearing section 243 can extend into the sampling tube 11 during the compression stroke, and the clearing section 243 cooperates with the sampling tube 11 to clear impurities.

[0057] like Figure 2 and Figure 4 As shown, as an optimization, both ends of the double inner thread tube 22 are provided with inner threads;

[0058] The spring 25 further comprises two polytetrafluoroethylene sealing pads 26 , which are located at both ends of the spring 25 .

[0059] The internal threads at both ends of the double internal thread tube 22 are respectively connected to the single-thread plug Ⅰ212 and the single-thread plug Ⅱ231, which is convenient for the later disassembly and maintenance of the overall structure;

[0060] The polytetrafluoroethylene sealing pads 26 are respectively located at both ends of the spring 25, and the single-wire plug I 212 and the single-wire plug II 231 are tightened on both sides of the double inner wire tube 22, so as to achieve a better sealing effect.

[0061] Working process or working principle:

[0062] A hole is opened on the steel plate at the outlet of the external secondary combustion chamber, and a sampling tube 11 is welded upwardly at an angle. A pressure-guiding tube 13 is welded above the middle of the sampling tube 11 to the external pressure transmitter. A flange II 211 is welded to the other end of the sampling tube 11, and a clearing sampling tube kit 2 is connected to one side of the flange II 211;

[0063] in:

[0064] Specifications of sampling tube 11: DN25; Material: stainless steel; Length: 30CM;

[0065] Specification of the pressure-conducting pipe 13: DN15, material: stainless steel;

[0066] Flange II 211 material: stainless steel.

[0067] A hole is opened on the surface of flange II 211, and the hole diameter is the diameter of the clearing section 243;

[0068] Take the single-wire plug I 212, the single-wire plug II 231 and the single-wire plug III 233 to make holes, and the hole diameter is the diameter of the guide section 244;

[0069] Wherein: the guide section 244 is made of stainless steel; the diameter is 15MM; and the length is 60CM.

[0070] Take the single-thread plug Ⅰ212 and weld it on the flange Ⅱ211, with the external thread section close to the double internal thread tube 22;

[0071] Double internal thread tube 22 (specification: DN25; length: 15CM), connected to the external thread section of single thread plug I212 through the internal thread section;

[0072] Use an external drill bit to install polytetrafluoroethylene sealing pads 26 on both sides of the spring 25 to seal the two ends of the double inner thread tube 22.

[0073] Spring 25 model: 2.5mm*25mm*180mm; elastic force: 12kg;

[0074] Put the clearing needle 24 with the spring 25 installed into the double inner thread tube 22, and fix the other end with a single thread plug II 231; weld a sealing sleeve 232 on the outside of the single thread plug II 231;

[0075] Among them: Specification: DN20; Length: 5cm;

[0076] Use the monofilament plug III 233 to compress and seal the sealing sleeve 232.

[0077] A handle 241 is installed on the side of the clearing needle 24 close to the sealing sleeve 232 .

[0078] By pushing the handle 241, the spring 25 is compressed inward, and the clearing needle 24 moves forward. After the coke block at the sampling port is cleared, the handle 241 is released, and the clearing needle 24 automatically rebounds using the elastic force of the spring 25 to avoid long-term contact with high temperature and damage.

[0079] There are heat-insulating materials and castables inside the outlet of the secondary combustion chamber, and the total stroke of the clearing needle 24 is greater than the thickness of the heat-insulating materials and castables inside the outlet of the secondary combustion chamber.

[0080] The diameter of the clearing needle 24 is 15 mm, and the inner diameter of the sampling tube 11 is 30 mm. It is installed at an angle on site. The coke blocks touched by the clearing needle 24 fall due to gravity and will not return to the inside of the sampling tube 11. During the regular clearing process, it will not affect the detection of the negative pressure at the outlet of the secondary combustion chamber.

[0081] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A negative pressure online clearing sampler for the outlet of a secondary combustion chamber, characterized in that: It comprises a pressure sampling tube assembly (1), one side of which is connected to a clearing sampling tube kit (2); The pressure sampling tube assembly (1) comprises a sampling tube (11), one side of the sampling tube (11) is connected to a flange plate I (12), a pressure tube (13) is vertically provided on the outer wall of the sampling tube (11), and the pressure tube (13) is connected to the sampling tube (11); The blockage clearing sampling tube kit (2) comprises a flange assembly (21), a double inner thread tube (22) and a single thread plug sleeve assembly (23) which are connected in sequence; The flange assembly (21) comprises a flange II (211) and a single-wire plug I (212), and the single-wire plug I (212) is connected to the single-wire plug sleeve assembly (23) via a double inner wire tube (22); It also includes a clearing needle (24), which is arranged to penetrate the flange assembly (21), the double inner wire tube (22) and the single wire plug sleeve assembly (23), and a handle (241) is provided at the end of the clearing needle (24); An anti-dropout gasket (242) is provided at the middle of the clearing needle (24) near the monofilament plug, and a spring (25) is provided on the left side of the anti-dropout gasket (242); The other end of the spring (25) contacts the single-wire plug I (212); The single-wire plug sleeve assembly (23) comprises a single-wire plug II (231) and a sealing sleeve (232). A single-wire plug III (233) is provided on the other side of the sealing sleeve (232). The sealing sleeve (232) and the single-wire plug III (233) are connected by threads.

2. The negative pressure online clearing sampler for the outlet of the secondary combustion chamber according to claim 1 is characterized in that: The clearing needle (24) comprises a clearing section (243) and a guide section (244); the diameter of the clearing section (243) is smaller than the diameter of the guide section (244).

3. The negative pressure online clearing sampler for the outlet of the secondary combustion chamber according to claim 2 is characterized in that: Both ends of the double inner thread tube (22) are provided with inner threads; It also includes two polytetrafluoroethylene sealing pads (26), which are located at both ends of the spring (25).

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