CN115789614A - Central pipe adjusting device of fire-pipe type waste heat boiler and outlet smoke temperature adjusting method thereof - Google Patents
Central pipe adjusting device of fire-pipe type waste heat boiler and outlet smoke temperature adjusting method thereof Download PDFInfo
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- CN115789614A CN115789614A CN202211199707.0A CN202211199707A CN115789614A CN 115789614 A CN115789614 A CN 115789614A CN 202211199707 A CN202211199707 A CN 202211199707A CN 115789614 A CN115789614 A CN 115789614A
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- 239000000779 smoke Substances 0.000 title claims abstract description 85
- 239000002918 waste heat Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 62
- 239000003546 flue gas Substances 0.000 claims description 62
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000004323 axial length Effects 0.000 claims description 3
- 238000010187 selection method Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The invention discloses a central pipe adjusting device of a fire tube type waste heat boiler and an outlet smoke temperature adjusting method thereof. The central pipe adjusting device comprises a central pipe arranged in the middle of the outlet end of the boiler body and a plug which is embedded in the outlet end part of the central pipe in a sealing mode, the plug is arranged in a conical mode, and the outlet end part of the central pipe is provided with a molded surface matched with the outer surface of the plug; the outlet end of the boiler body is provided with a smoke box; the outer side of the plug is connected with the power output end of the plug push-pull mechanism; the plug push-pull mechanism comprises a push-pull rod, a matching block and a power driving mechanism; the push-pull rod is arranged along the axis of the smoke box, a spherical surface matching connection structure is formed between one end of the push-pull rod and the outer end of the plug, an axial anti-falling part is arranged between the push-pull rod and the outer end of the plug, the other end of the push-pull rod penetrates through the matching block and then is connected with the power output end of the power driving mechanism, the push-pull rod and the matching block are in threaded matching connection, the matching block is fixedly installed at the outlet end of the smoke box, and the power driving mechanism is externally arranged on the smoke box.
Description
Technical Field
The invention relates to a central pipe adjusting device of a fire-pipe type waste heat boiler and an outlet smoke temperature adjusting method thereof, belonging to the field of waste heat boiler manufacturing.
Background
The flue gas temperature regulation of the fire tube type boiler outlet with the central tube at present adds a metal plug connected by a high temperature resistant metal rod at the central tube outlet, plugs the whole metal plug at the central tube outlet when the boiler operates normally, and extracts the whole metal plug through a connecting rod when the temperature is required to be regulated, so that the whole process is greatly opened and closed, and the regulation effect is not ideal.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a central pipe adjusting device of a fire tube type waste heat boiler. The flue gas flow of the central pipe at the boiler is timely adjusted outside the boiler without stopping, thereby achieving the self-adaptive adjustment of the flue gas temperature at the outlet of the boiler.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a central pipe adjusting device of a fire tube type waste heat boiler comprises a central pipe arranged in the middle of the outlet end of a boiler body and a plug embedded in the outlet end of the central pipe in a sealing mode, wherein the plug is arranged in a conical mode, and the outlet end of the central pipe is provided with a molded surface matched with the outer surface of the plug; the outlet end of the boiler body is provided with a smoke box; the outer side of the plug is connected with the power output end of the plug push-pull mechanism;
the plug push-pull mechanism comprises a push-pull rod, a matching block and a power driving mechanism;
the push-pull rod is arranged along the axis of the smoke box, a spherical surface matching connection structure is formed between one end of the push-pull rod and the outer end of the plug, an axial anti-release piece is arranged between the push-pull rod and the outer end of the plug, the other end of the push-pull rod penetrates through the matching block and then is connected with the power output end of the power driving mechanism, the push-pull rod and the matching block are in threaded matching connection, the matching block is fixedly installed at the outlet end of the smoke box, and the power driving mechanism is externally arranged on the smoke box.
Preferably, two matching connecting holes are formed between the matching block and the push-pull rod, and the first matching connecting hole and the second matching connecting hole correspond to each other;
the first matching connecting hole is an internal threaded hole and can form a threaded matching connecting structure with external threads arranged at a position corresponding to the push-pull rod;
the second matching connection hole is a unthreaded hole and can be connected with the push-pull rod in a guiding matching manner.
Preferably, the matching block comprises a sleeve, a sleeve front cover plate and a sleeve rear cover plate which are respectively sealed with the two ends of the sleeve;
the sleeve is arranged along the axis of the smoke box, and the outer wall of the sleeve is fixed with the outlet end of the smoke box; the middle position of the sleeve front cover plate is provided with the second matching connecting hole, and the middle position of the sleeve rear cover plate is provided with the first matching connecting hole.
Preferably, a spherical bolt head is arranged at one end of the push-pull rod connected with the plug;
a concave spherical body matched with the head of the spherical bolt is arranged at the middle position of the outer side end of the plug; the opening part of the concave spherical body is arranged towards the head of the spherical bolt, and the axial anti-falling part is assembled at the opening part of the concave spherical body;
the axial anti-falling piece is a groove cover plate, and a through hole is formed in the middle of the groove cover plate;
the ball bolt head is embedded in the concave spherical body and forms a matched spherical matching connection structure with the concave spherical body.
Preferably, a rectangular positioning block is embedded at the outer end of the plug, and the outer end surface of the rectangular positioning block is recessed in the middle position to form the concave spherical body.
Preferably, a guide rail is arranged below the plug; the extending direction of the guide rail is parallel to the length extending direction of the push-pull rod; the plug can be movably mounted in the guide rail.
Preferably, the power driving mechanism is a motor or a rotary hand wheel.
Another technical object of the present invention is to provide a method for adjusting an outlet flue gas temperature of a fire tube type waste heat boiler, which is implemented based on the central tube adjusting device of the fire tube type waste heat boiler, and comprises the following steps:
step one, installing a central pipe adjusting device at the middle position of the outlet end of a boiler body
Step 1.1, preparing a conical plug, a push-pull rod and a matching block with a specific structural form
Providing a conical plug with the diameter of the outer end D and the diameter of the inner end D, and arranging a rectangular groove in the middle of the outer end of the conical plug; a matched rectangular positioning block is connected in the rectangular groove, the outer side end face of the rectangular positioning block extends out of the notch of the rectangular inward concave groove for a distance d1, and the outer side end face of the rectangular positioning block is inward concave at the middle position to form a concave spherical body;
providing a push-pull rod, arranging a spherical bolt head at the front end of the push-pull rod, and arranging an external thread with a length of L at the other end of the push-pull rod;
providing a matching block, wherein the matching block consists of a sleeve, a sleeve front cover plate and a sleeve rear cover plate; the sleeve front cover plate and the sleeve rear cover plate are respectively sealed with the front end and the rear end of the sleeve; the middle position of the sleeve front cover plate is provided with a second matching connecting hole, and the middle position of the sleeve rear cover plate is provided with a first matching connecting hole; the first matching connection hole is an internal thread hole and can form a thread matching connection structure with an external thread of the push-pull rod; the second matching connection hole is a unthreaded hole and can be connected with the push-pull rod in a guiding matching manner;
step 1.2, embedding a conical plug in the end part of the outlet of the central tube in a sealing manner;
step 1.3, placing a spherical bolt head arranged at the front end of the push-pull rod in the concave spherical body, then sleeving the groove cover plate on the periphery of the push-pull rod and moving until the groove cover plate can be welded and fixed with a notch of the concave spherical body so as to limit the moving space of the concave spherical body;
step 1.4, sleeving the matching block on the periphery of the push-pull rod, and rotationally moving the matching block until the matching block can be welded and fixed at the outlet of the smoke box; the axial length of the smoke box meets the length requirement that the smoke at the outlet of the central pipe and the smoke at the outlet of the boiler body can be freely and uniformly mixed;
step 1.5, installing a power driving mechanism at the rear end of the push-pull rod so as to provide power for the work of the central pipe adjusting device;
secondly, mounting a first temperature sensor capable of monitoring the temperature of the flue gas in the central pipe and a first flowmeter capable of monitoring the flow rate of the flue gas in the central pipe on the central pipe; the first temperature sensor can feed back the detected temperature value T1 to the data processing device, and the flowmeter can feed back the detected flow rate value Q1 to the data processing device;
step three, respectively installing a second temperature sensor and a second flowmeter at the outlet position of the boiler body; the second temperature sensor is capable of detecting a temperature value T 2 Feeding back to the data processing device, the second flowmeter being capable of detecting the flow rate value Q 2 Feeding back to the data processing device;
the data processing device comprises three modules which are a judgment module, a data calculation module and an execution module correspondingly; the judging module is used for receiving the temperature value T 2 With a preset target temperature T of the flue gas 0 Comparing, and judging if the result shows that the T value is greater than the threshold value 2 -T 0 |>5％T 0 Triggering a data calculation module; the data calculation module is constructed based on a heat transfer equation and can be used for calculating the target temperature T of the flue gas according to the preset target temperature T of the flue gas 0 The received temperature value T 2 And flow rate value Q 2 Calculating the required temperature value as T 1 The flue gas flow Q, then trigger the execution module; the execution module is used for sending an execution instruction to the power driving mechanism so as to control the power driving mechanism to output power, drive the plug push-pull mechanism to drive the plug to slowly pull out of the end part of the outlet of the central tube until the flow value Q fed back by the first flowmeter 1 Equal to the flue gas flow Q.
Preferably, in the second step, the central pipe has more than one flue gas inlet, the flue gas temperatures of the flue gas inlets of the central pipe are different from each other, the flue gas inlets of the central pipe are respectively provided with a control valve, and a second temperature sensor is respectively arranged at positions close to the on-off valves so as to respectively detect the flue gas temperatures T at the corresponding installation positions 2j And j represents any flue gas inlet of the central tube; in the fourth step, the flue gas temperature T in the input central tube needs to be selected first 1 Then calculating the required temperature value as T 1 The flue gas flow Q; wherein, the smoke temperature T of the central tube inlet in the central tube is input 1 The selection method comprises the following steps:
the data calculation module firstly calculates the target temperature T of the smoke according to the preset smoke 0 The received temperature value T 2 And flow rate value Q 2 Respectively calculating the flue gas flow rate in the center tube as 80% m Time corresponding smoke temperature value T max And the flue gas flow in the center tube is 20% m Time corresponding smoke temperature value T min ，Q m Indicating the flow when the plug is completely separated from the outlet end of the central tube; then according to the selection condition T min ≤T≤T max To screen out the matched central tube inlet smoke temperature T 2j When the screened central tube inlet smoke temperature T 2j When only one is available, the data calculation module can send a valve opening and closing instruction to the control valve at the corresponding position through the execution module so as to open the screened central tube inlet smoke temperature T 2j A corresponding control valve; when the temperature T of the smoke at the inlet of the screened central tube is 2j When there is more than one, the data calculation module firstly calculates the smoke temperature T of each central tube inlet 2j Sorting, and selecting the smoke temperature T at the inlet of the central tube 2j The largest smoke is used as the input smoke of the central pipe, and the data calculation module can send a valve opening and closing instruction to the control valve through the execution module so as to open the control valve corresponding to the smoke temperature at the inlet of the central pipe.
In the first step, the aperture of a second matching connecting hole formed in the center of the sleeve front cover plate is 2mm larger than the diameter of the threaded rod; the length of the external thread of the push-pull rod meets the requirement that the plug is completely separated/installed in place at the outlet of the central pipe; the length of the external thread of the push-pull rod meets the requirement that the plug is completely separated/installed in place at the outlet of the central pipe.
Based on the technical purpose, compared with the prior art, the invention has the following advantages:
1. the furnace does not need to be shut down, the smoke temperature can be adjusted by rotating the rotation amplitude of the hand wheel outside the furnace, the operation is simple and convenient, and the sealing performance is realized;
2. on the basis, a hand wheel can be replaced by a transmission mechanism, so that automation can be realized.
3. The structure is simple and reliable, the processing cost is low, and the device can be used for all fire tube waste heat boilers with central tubes.
Drawings
FIG. 1 is a schematic structural diagram of a fire tube type waste heat boiler with a central tube regulating device according to the present invention;
FIG. 2 is a schematic view of the structure of the guide rail of FIG. 1;
FIG. 3 is a partial enlarged view of the fitting connection portion of the positioning block and the head of the spherical bolt in FIG. 1;
in fig. 1 to 2: 1. a fire tube boiler; 2. a central tube; 3. a smoke box; 4. a plug; 5. a plug cover plate; 6. a bolt shank; 7. a sleeve front cover plate; 8. a sleeve; 9. a sleeve rear cover plate; 10. a hand wheel; 11. a guide rail; 12. a spherical bolt head; 13. positioning blocks; 14. and a groove cover plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The relative arrangement of the components and steps, expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
Example 1
As shown in fig. 1 to 3, the central tube adjusting device of the fire tube type waste heat boiler comprises a central tube arranged in the middle of the outlet end of the boiler body and a plug hermetically embedded at the outlet end of the central tube, wherein the plug is arranged in a conical shape and is formed by welding high-temperature-resistant steel plates, and the outlet end of the central tube is provided with a molded surface matched with the outer surface of the plug; the outlet end of the boiler body is provided with a smoke box; the outer side of the plug is connected with the power output end of the plug push-pull mechanism; the plug push-pull mechanism comprises a push-pull rod, a matching block and a power driving mechanism; the push-pull rod is arranged along the axis of the smoke box, a spherical surface matching connection structure is formed between one end of the push-pull rod and the outer end of the plug, an axial anti-release piece is arranged between the push-pull rod and the outer end of the plug, the other end of the push-pull rod penetrates through the matching block and then is connected with the power output end of the power driving mechanism, the push-pull rod and the matching block are in threaded matching connection, the matching block is fixedly installed at the outlet end of the smoke box, and the power driving mechanism is externally arranged on the smoke box.
In the invention, two matching connecting holes are arranged between the matching block and the push-pull rod, and are a first matching connecting hole and a second matching connecting hole correspondingly; the first matching connecting hole is an internal threaded hole and can form a threaded matching connecting structure with external threads arranged at a position corresponding to the push-pull rod; the second matching connecting hole is a smooth hole and can be connected with the push-pull rod in a guiding matching mode. Specifically, the matching block comprises a sleeve, a sleeve front cover plate and a sleeve rear cover plate which are respectively sealed with two ends of the sleeve; the sleeve is arranged along the axis of the smoke box, and the outer wall of the sleeve is fixed with the outlet end of the smoke box; the second matching connecting hole is arranged at the middle position of the sleeve front cover plate, and the first matching connecting hole is arranged at the middle position of the sleeve rear cover plate.
In order to form a spherical surface matching connection structure between one end of the push-pull rod and the outer side end of the plug, a spherical bolt head is arranged at one end of the push-pull rod connected with the plug; and a concave spherical body matched with the spherical bolt head is arranged at the middle position of the outer side end of the plug. The opening part of the concave spherical body is arranged towards the head of the spherical bolt, and the axial anti-falling part is assembled at the opening part of the concave spherical body; the axial anti-falling piece is a groove cover plate, and a through hole is formed in the middle of the groove cover plate; the ball bolt head is embedded in the concave spherical body and forms a matched spherical matching connection structure with the concave spherical body.
In order to arrange the concave spherical body at the outer side end of the plug, a rectangular groove is arranged at the middle position of the outer side end of the plug, a rectangular positioning block is embedded in the rectangular groove, and the outer side end surface of the rectangular positioning block is recessed at the middle position to form the concave spherical body.
In order to prevent one end of the plug from sinking or deviating when the push-pull rod works, a guide rail welded by round steel is additionally arranged at the lower part of the plug; the extending direction of the guide rail is parallel to the length extending direction of the push-pull rod; the plug can be movably mounted in the guide rail.
The power driving mechanism can be a motor and also can be a rotating hand wheel. When the power driving mechanism is not provided with the motor, the central pipe adjusting device can be set to be an intelligent adjusting device.
When the device is used, the hand wheel is rotated, the push-pull rod moves back and forth along the length direction of the threads to drive the spherical bolt head in the concave spherical body, and the spherical bolt head pulls the sealed conical plug to move back and forth on the guide rail when rotating, so that the contact surface between the side surface of the sealed conical plug and the central tube is opened or closed in a small range, and the opening degree of the central tube is adjusted.
Example 2
The invention provides a fire tube type waste heat boiler outlet smoke temperature adjusting method based on the central tube adjusting device of the fire tube type waste heat boiler, which comprises the following steps:
step one, installing a central pipe adjusting device at the middle position of the outlet end of a boiler body
Step 1.1, preparing a conical plug, a push-pull rod and a matching block with a specific structural form
Providing a conical plug with the diameter of the outer end D and the diameter of the inner end D, and arranging a rectangular groove in the middle of the outer end of the conical plug; a matched rectangular positioning block is connected in the rectangular groove, the outer side end face of the rectangular positioning block extends out of the notch of the rectangular inward concave groove for a distance d1, and the outer side end face of the rectangular positioning block is inward concave at the middle position to form a concave spherical body;
providing a push-pull rod, arranging a spherical bolt head at the front end of the push-pull rod, and arranging a section of external thread with the length of L at the other end of the push-pull rod;
providing a matching block, wherein the matching block consists of a sleeve, a sleeve front cover plate and a sleeve rear cover plate; the sleeve front cover plate and the sleeve rear cover plate are respectively sealed with the front end and the rear end of the sleeve; the middle position of the sleeve front cover plate is provided with a second matching connecting hole, and the middle position of the sleeve rear cover plate is provided with a first matching connecting hole; the first matching connection hole is an internal thread hole and can form a thread matching connection structure with an external thread of the push-pull rod; the second matching connection hole is a unthreaded hole and can be connected with the push-pull rod in a guiding matching manner; the sleeve 8 is a steel tube of diameter 108.
The aperture of a second matching connecting hole formed in the center of the sleeve front cover plate is 2mm larger than the diameter of the threaded rod; the length of the external thread of the push-pull rod meets the requirement that the plug is completely separated/installed in place at the outlet of the central pipe; the length of the external thread of the push-pull rod meets the requirement that the plug is completely separated/installed in place at the outlet of the central pipe.
And step 1.2, the conical plug is hermetically embedded at the end part of the outlet of the central tube.
And step 1.3, placing a spherical bolt head arranged at the front end of the push-pull rod in the concave spherical body, and then sleeving the groove cover plate on the periphery of the push-pull rod and moving until the groove cover plate can be fixedly welded with a notch of the concave spherical body so as to limit the moving space of the concave spherical body.
Step 1.4, sleeving the matching block on the periphery of the push-pull rod, and rotationally moving the matching block until the matching block can be welded and fixed at the outlet of the smoke box; the axial length of the smoke box meets the length requirement that the smoke at the outlet of the central tube and the smoke at the outlet of the boiler body can be freely and uniformly mixed.
And step 1.5, installing a power driving mechanism at the rear end of the push-pull rod so as to provide power for the work of the central pipe adjusting device, wherein the power driving mechanism selects a motor.
Secondly, mounting a first temperature sensor capable of monitoring the temperature of the flue gas in the central pipe and a first flowmeter capable of monitoring the flow rate of the flue gas in the central pipe on the central pipe; the first temperature sensor can feed back the detected temperature value T1 to the data processing device, and the flowmeter can feed back the detected flow rate value Q1 to the data processing device;
thirdly, respectively installing a second temperature sensor and a second flowmeter at the outlet position of the boiler body; the second temperature sensor is capable of detecting a temperature value T 2 Feeding back to the data processing device, the second flowmeter being capable of detecting the flow rate value Q 2 Feeding back to the data processing device;
the data processing device comprises three modules which are a judgment module, a data calculation module and an execution module correspondingly; the judging module is used for receiving the temperature value T 2 With a preset target temperature T of the flue gas 0 Comparing, and judging if the result shows that the T value is greater than the threshold value 2 -T 0 |>5％T 0 Triggering a data calculation module; the data calculation module is constructed based on a heat transfer equation and can be used for calculating the target temperature T of the flue gas according to the preset target temperature T 0 The received temperature value T 2 And flow rate value Q 2 Calculating the required temperature value as T 1 The flue gas flow Q, then trigger the execution module; the execution module is used for sending an execution instruction to the power driving mechanism so as to control the power driving mechanism to output power, drive the plug push-pull mechanism to drive the plug to slowly pull out of the end part of the outlet of the central tube until the flow value Q fed back by the first flowmeter 1 Equal to the flue gas flow Q.
Example 3
When the flue gas output by the flue gas box in embodiment 2 needs to be conveyed to equipment with different flue gas temperature requirements, in order to expand the flue gas temperature range of the output flue gas, on one hand, the embodiment changes the flue gas input mode of the central pipe in embodiment 2, specifically, the central pipe has more than one flue gas inlet, the flue gas temperatures of the flue gas inlets of the central pipe are different from each other, and meanwhile, the flue gas temperatures of the flue gas inlets of the central pipe are different from each otherControl valves are arranged at the inlets, and a second temperature sensor is respectively arranged at the positions close to the on-off valves so as to respectively detect the smoke temperature T at the corresponding mounting positions 2j J represents any of the flue gas inlets of the central tube; on the other hand, in the fourth step proceeding to example 2, it is necessary to first select the flue gas temperature T in the inlet center tube 1 Then calculating the required temperature value as T 1 The flue gas flow rate Q; wherein, the smoke temperature T of the central tube inlet in the central tube is input 1 The selection method comprises the following steps:
the data calculation module firstly calculates the target temperature T of the smoke according to the preset smoke 0 The received temperature value T 2 And flow rate value Q 2 Respectively calculating the flue gas flow rate in the center tube as 80% m Time corresponding smoke temperature value T max And the flue gas flow in the center tube is 20% m Smoke temperature value T corresponding to time min ，Q m Indicating the flow when the plug is completely separated from the outlet end of the central tube; then according to the selection condition T min ≤T≤T max To screen out the matched central tube inlet smoke temperature T 2j When the screened central tube inlet smoke temperature T is 2j When only one is available, the data calculation module can send a valve opening and closing instruction to the control valve at the corresponding position through the execution module so as to open the screened central tube inlet smoke temperature T 2j A corresponding control valve; when the temperature T of the smoke at the inlet of the screened central tube is 2j When there is more than one, the data calculation module firstly calculates the smoke temperature T of each central tube inlet 2j Sorting, and selecting the smoke temperature T at the inlet of the central tube 2j The largest smoke is used as the input smoke of the central pipe, and the data calculation module can send a valve opening and closing instruction to the control valve through the execution module so as to open the control valve corresponding to the smoke temperature at the inlet of the central pipe.
Claims (10)
1. A central tube adjusting device of a fire tube type waste heat boiler comprises a central tube arranged in the middle of the outlet end of a boiler body and a plug hermetically embedded at the outlet end part of the central tube, and is characterized in that the plug is arranged in a conical shape, and the outlet end part of the central tube is provided with a molded surface matched with the outer surface of the plug; the outlet end of the boiler body is provided with a smoke box; the outer side of the plug is connected with the power output end of the plug push-pull mechanism;
the plug push-pull mechanism comprises a push-pull rod, a matching block and a power driving mechanism;
the smoke box is characterized in that the push-pull rod is arranged along the axis of the smoke box, a spherical surface matching connection structure is formed between one end of the push-pull rod and the outer end of the plug, an axial anti-release piece is arranged between the push-pull rod and the outer end of the plug, the other end of the push-pull rod penetrates through the matching block and then is connected with the power output end of the power driving mechanism, the push-pull rod and the matching block are in threaded matching connection, the matching block is fixedly installed at the outlet end of the smoke box, and the power driving mechanism is externally arranged on the smoke box.
2. The central tube adjusting device of the fire tube type waste heat boiler as claimed in claim 1, wherein two matching connecting holes are formed between the matching block and the push-pull rod, and the first matching connecting hole and the second matching connecting hole correspond to each other; the first matching connecting hole is an internal threaded hole and can form a threaded matching connecting structure with external threads arranged at a position corresponding to the push-pull rod;
the second matching connection hole is a unthreaded hole and can be connected with the push-pull rod in a guiding matching manner.
3. The central tube adjusting device of the fire tube type waste heat boiler as claimed in claim 2, wherein the matching block comprises a sleeve, and a sleeve front cover plate and a sleeve rear cover plate which are respectively sealed with two ends of the sleeve; the sleeve is arranged along the axis of the smoke box, and the outer wall of the sleeve is fixed with the outlet end of the smoke box; the middle position of the sleeve front cover plate is provided with the second matching connecting hole, and the middle position of the sleeve rear cover plate is provided with the first matching connecting hole.
4. The central tube adjusting device of the fire tube type waste heat boiler as claimed in claim 3, wherein a spherical bolt head is arranged at one end of the push-pull rod connected with the plug;
a concave spherical body matched with the head of the spherical bolt is arranged at the middle position of the outer side end of the plug; the opening part of the concave spherical body is arranged towards the head of the spherical bolt, and the axial anti-falling part is assembled at the opening part of the concave spherical body;
the axial anti-falling piece is a groove cover plate, and a through hole is formed in the middle of the groove cover plate;
the spherical bolt head is embedded in the concave spherical body and forms a matched spherical matching connection structure with the concave spherical body.
5. The central tube adjusting device of the fire tube type waste heat boiler as claimed in claim 4, wherein a rectangular positioning block is embedded at the outer end of the plug, and the outer end face of the rectangular positioning block is recessed at the middle position to form the concave spherical surface.
6. The central pipe adjusting device of the fire-pipe type waste heat boiler as claimed in claim 5, wherein a guide rail is arranged below the plug; the extending direction of the guide rail is parallel to the length extending direction of the push-pull rod; the plug can be movably mounted in the guide rail.
7. The central tube adjusting device of the fire tube type waste heat boiler as recited in claim 1, wherein the power driving mechanism is a motor or a rotating handwheel.
8. An outlet flue gas temperature adjusting method of a fire tube type waste heat boiler is realized based on the central tube adjusting device of the fire tube type waste heat boiler disclosed by claim 1, and is characterized by comprising the following steps of:
step one, installing a central pipe adjusting device at the middle position of the outlet end of a boiler body
Step 1.1, preparing a conical plug, a push-pull rod and a matching block with a specific structural form
Providing a conical plug with the diameter of the outer end D and the diameter of the inner end D, and arranging a rectangular groove in the middle of the outer end of the conical plug; a matched rectangular positioning block is connected in the rectangular groove, the outer side end face of the rectangular positioning block extends out of the notch of the rectangular inward concave groove for a distance d1, and the outer side end face of the rectangular positioning block is inward concave at the middle position to form a concave spherical body;
providing a push-pull rod, arranging a spherical bolt head at the front end of the push-pull rod, and arranging a section of external thread with the length of L at the other end of the push-pull rod;
providing a matching block, wherein the matching block consists of a sleeve, a sleeve front cover plate and a sleeve rear cover plate; the sleeve front cover plate and the sleeve rear cover plate are respectively sealed with the front end and the rear end of the sleeve; the middle position of the sleeve front cover plate is provided with a second matching connecting hole, and the middle position of the sleeve rear cover plate is provided with a first matching connecting hole; the first matching connection hole is an internal thread hole and can form a thread matching connection structure with an external thread of the push-pull rod; the second matching connection hole is a unthreaded hole and can be connected with the push-pull rod in a guiding matching manner;
step 1.2, embedding a conical plug in the end part of the outlet of the central tube in a sealing manner;
step 1.3, placing a spherical bolt head arranged at the front end of the push-pull rod in the concave spherical body, then sleeving the groove cover plate on the periphery of the push-pull rod and moving until the groove cover plate can be welded and fixed with a notch of the concave spherical body so as to limit the moving space of the concave spherical body;
step 1.4, sleeving the matching block on the periphery of the push-pull rod, and rotationally moving the matching block until the matching block can be welded and fixed at the outlet of the smoke box; the axial length of the smoke box meets the length requirement that the smoke at the outlet of the central pipe and the smoke at the outlet of the boiler body can be freely and uniformly mixed;
step 1.5, installing a power driving mechanism at the rear end of the push-pull rod so as to provide power for the work of the central pipe adjusting device;
secondly, mounting a first temperature sensor capable of monitoring the temperature of the flue gas in the central pipe and a first flowmeter capable of monitoring the flow rate of the flue gas in the central pipe on the central pipe; the first temperature sensor can feed back the detected temperature value T1 to the data processing device, and the flowmeter can feed back the detected flow rate value Q1 to the data processing device;
thirdly, respectively installing a second temperature sensor and a second flowmeter at the outlet position of the boiler body; the second temperature sensor is capable of detecting a temperature value T 2 Feeding back to the data processing device, the second flowmeter being capable of detecting the flow rate value Q 2 Feeding back to the data processing device;
the data processing device comprises three modules which correspond to a judgment module, a data calculation module and an execution module; the judging module is used for receiving the temperature value T 2 With a preset target temperature T of the flue gas 0 Comparing, and judging if the result shows that the T value is greater than the threshold value 2 -T 0 |>5％T 0 Triggering a data calculation module; the data calculation module is constructed based on a heat transfer equation and can be used for calculating the target temperature T of the flue gas according to the preset target temperature T 0 The received temperature value T 2 And flow rate value Q 2 Calculating the required temperature value as T 1 The flue gas flow Q, then trigger the execution module; the execution module is used for sending an execution instruction to the power driving mechanism so as to control the power driving mechanism to output power, drive the plug push-pull mechanism to drive the plug to slowly pull out of the end part of the outlet of the central tube until the flow value Q fed back by the first flowmeter 1 Equal to the flue gas flow Q.
9. The outlet flue gas temperature adjusting method of the fire tube type waste heat boiler according to claim 8, wherein in the second step, the central tube has more than one flue gas inlet, the flue gas temperatures of the flue gas inlets of the central tube are different from each other, the flue gas inlets of the central tube are respectively provided with a control valve, and a second temperature sensor is respectively arranged at the positions close to the on-off valves so as to respectively detect the flue gas temperatures T at the corresponding mounting positions 2j J represents any of the flue gas inlets of the central tube; in the fourth step, the flue gas temperature T in the input central tube needs to be selected first 1 Then calculating the required temperature value as T 1 The flue gas flow rate Q; wherein, the central tube inlet smoke temperature T in the central tube is input 1 The selection method comprises the following steps:
the data calculation module firstly calculates the target temperature T of the smoke according to the preset smoke 0 A received temperature value T 2 And flow rate value Q 2 Respectively calculating the flue gas flow rate in the center tube as 80% m Time corresponding smoke temperature value T max And the flue gas flow in the center tube is 20% m Smoke temperature value T corresponding to time min ，Q m The flow rate when the plug is completely separated from the outlet end of the central pipe is shown; then according to the selection condition T min ≤T≤T max To screen out the matched central tube inlet smoke temperature T 2j When the screened central tube inlet smoke temperature T is 2j When only one is available, the data calculation module can send a valve opening and closing instruction to the control valve at the corresponding position through the execution module so as to open the screened central tube inlet smoke temperature T 2j A corresponding control valve; when the temperature T of the smoke at the inlet of the screened central tube is 2j When there is more than one, the data calculation module firstly calculates the smoke temperature T of each central tube inlet 2j Sorting, and selecting the smoke temperature T at the inlet of the central tube 2j The largest smoke is used as the input smoke of the central pipe, and the data calculation module can send a valve opening and closing instruction to the control valve through the execution module so as to open the control valve corresponding to the smoke temperature at the inlet of the central pipe.
10. The outlet flue gas temperature adjusting method of the fire tube type waste heat boiler as claimed in claim 8, wherein in the first step, the aperture of the second matching connection hole formed in the center of the sleeve front cover plate is 2mm larger than the diameter of the threaded rod; the length of the external thread of the push-pull rod meets the requirement that the plug is completely separated/installed in place at the outlet of the central pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211199707.0A CN115789614B (en) | 2022-09-29 | 2022-09-29 | Central tube adjusting device of fire tube type waste heat boiler and outlet smoke temperature adjusting method thereof |
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| CN202211199707.0A CN115789614B (en) | 2022-09-29 | 2022-09-29 | Central tube adjusting device of fire tube type waste heat boiler and outlet smoke temperature adjusting method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190022559A (en) * | 1900-12-11 | 1901-04-20 | Ferdinand Henry Fitzler | Improvements relating to Water Circulating Devices for Fire-tube Boilers. |
| CN201531898U (en) * | 2009-04-17 | 2010-07-21 | 中江能源回收(上海)有限公司 | Central tube flue gas double valve flap regulation valve |
| CN203052686U (en) * | 2012-12-27 | 2013-07-10 | 盐城市锅炉制造有限公司 | Fire tube type waste heat boiler soot cleaning device |
| CN112682809A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Waste heat boiler for waste sulfuric acid cracking regeneration device and method for treating flue gas |
| CN218885199U (en) * | 2022-09-29 | 2023-04-18 | 江苏东九重工股份有限公司 | Central tube adjusting device of fire tube type waste heat boiler |
-
2022
- 2022-09-29 CN CN202211199707.0A patent/CN115789614B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190022559A (en) * | 1900-12-11 | 1901-04-20 | Ferdinand Henry Fitzler | Improvements relating to Water Circulating Devices for Fire-tube Boilers. |
| CN201531898U (en) * | 2009-04-17 | 2010-07-21 | 中江能源回收(上海)有限公司 | Central tube flue gas double valve flap regulation valve |
| CN203052686U (en) * | 2012-12-27 | 2013-07-10 | 盐城市锅炉制造有限公司 | Fire tube type waste heat boiler soot cleaning device |
| CN112682809A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Waste heat boiler for waste sulfuric acid cracking regeneration device and method for treating flue gas |
| CN218885199U (en) * | 2022-09-29 | 2023-04-18 | 江苏东九重工股份有限公司 | Central tube adjusting device of fire tube type waste heat boiler |
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| CN115789614B (en) | 2023-12-22 |
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