CN105757387A - Pipeline emergency thawing device utilizing solar hot air recirculating - Google Patents
Pipeline emergency thawing device utilizing solar hot air recirculating Download PDFInfo
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- CN105757387A CN105757387A CN201610214054.7A CN201610214054A CN105757387A CN 105757387 A CN105757387 A CN 105757387A CN 201610214054 A CN201610214054 A CN 201610214054A CN 105757387 A CN105757387 A CN 105757387A
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- 238000010257 thawing Methods 0.000 title claims abstract description 21
- 230000003134 recirculating effect Effects 0.000 title 1
- 238000005338 heat storage Methods 0.000 claims abstract description 7
- 230000008676 import Effects 0.000 claims 4
- 230000001105 regulatory effect Effects 0.000 abstract description 18
- 238000009413 insulation Methods 0.000 abstract description 11
- 238000010438 heat treatment Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000005485 electric heating Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/30—Heating of pipes or pipe systems
- F16L53/32—Heating of pipes or pipe systems using hot fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
一种利用太阳能热风再循环的管道应急解冻装置，其热空气套管(3)套装在需要伴热的主管道(2)外周，与需要伴热的管道为同轴布置，包裹在同一储热保温层(1)内。空气流量调节阀门(7)安装在热空气套管(3)的出口与热风再循环管道(6)的进口之间。热风再循环管道(6)的出口与再循环风机(4)相连接，再循环风机(4)的出口连接空气加热器(5)，太阳能空气加热器(5)的出口连接热空气套管(3)的进口，热空气套管(3)的出口通过空气流量调节阀(7)连接热风再循环管道(6)，与热风再循环管道(6)连通。太阳能空气加热器(5)、热空气套管(3)、热风再循环管道(6)和再循环风机(4)构成伴热循环回路，为主管道(2)伴热。
An emergency thawing device for pipelines using solar hot air recirculation, the hot air sleeve (3) is set on the outer periphery of the main pipeline (2) that needs heat tracing, arranged coaxially with the pipelines that need heat tracing, wrapped in the same heat storage In the insulation layer (1). The air flow regulating valve (7) is installed between the outlet of the hot air sleeve (3) and the inlet of the hot air recirculation pipe (6). The outlet of the hot blast recirculation pipe (6) is connected with the recirculation fan (4), the outlet of the recirculation fan (4) is connected with the air heater (5), and the outlet of the solar air heater (5) is connected with the hot air casing ( 3), the outlet of the hot air sleeve (3) is connected to the hot air recirculation pipe (6) through the air flow regulating valve (7), and is communicated with the hot air recirculation pipe (6). The solar air heater (5), the hot air sleeve (3), the hot air recirculation pipeline (6) and the recirculation fan (4) form a heat tracing circulation loop, which is heat tracing for the main pipe (2).
Description
技术领域technical field
本发明涉及一种管道应急解冻装置，特别涉及太阳能热风利用的管道解冻装置。The invention relates to an emergency thawing device for pipelines, in particular to a pipeline thawing device utilizing solar hot air.
背景技术Background technique
在环境温度低于工质凝结温度时，充满工质的管道会通过自然对流和热传导等方式对环境散热，导致管内工质温度降低，当工质温度低于凝结温度时，可能导致管道内工质发生冻结现象，使得管道发生堵塞，工质无法正常流动，造成整个管道系统无法运行。When the ambient temperature is lower than the condensation temperature of the working fluid, the pipeline filled with the working fluid will dissipate heat to the environment through natural convection and heat conduction, resulting in a decrease in the temperature of the working fluid in the pipeline. The refrigerant freezes, causing the pipeline to be blocked, and the working fluid cannot flow normally, resulting in the failure of the entire pipeline system to operate.
传统管道应急解冻的方法是对管道加装保温层，同时使用电伴热带缠绕管道，利用电加热的方式保持管内工质温度高于其凝结温度，或者当管道内工质发生冻结时，利用电加热的方式给管内工质加热，实现管道的解冻。利用电伴热带加热的方法实现带保温层管道的和解冻的技术存在耗电量大，电伴热带发生故障时难以确定故障点的位置问题，在现场运行中，难以有效实现管道和解冻的经济性和可靠性要求。The traditional method for emergency thawing of pipelines is to install an insulation layer on the pipeline, and at the same time use electric heating tape to wrap the pipeline, and use electric heating to keep the temperature of the working fluid in the pipeline higher than its condensation temperature, or when the working fluid in the pipeline freezes, use electric heating to The heating method heats the working medium in the pipe to realize the thawing of the pipe. The technology of using electric heating cable to heat the pipe with insulation layer and thawing technology has the problem of high power consumption, and it is difficult to determine the location of the fault point when the electric heating cable fails. and reliability requirements.
国内关于解冻的现有技术多集中于电伴热和蒸汽、热水伴热技术，蒸汽伴热或热水伴热存在伴热管线跑冒滴漏的问题，会影响到需要伴热管道的安全运行。当主管道停运时间比较长时，同样存在冻结的问题。Domestic existing technologies on thawing are mostly focused on electric heat tracing and steam and hot water heat tracing technology. Steam heat tracing or hot water heat tracing has the problem of running, emitting, dripping and leaking in the heat tracing pipeline, which will affect the safe operation of the heat tracing pipeline. . When the main pipeline is out of service for a long time, there is also the problem of freezing.
现有解冻的技术需要消耗电能或高温蒸汽，采用太阳能空气加热器作为热源的技术尚未见相关报道。The existing thawing technology needs to consume electric energy or high-temperature steam, and the technology using solar air heaters as a heat source has not been reported yet.
发明内容Contents of the invention
本发明的目的是克服电伴热、蒸汽伴热或热水伴热实现管道解冻技术中存在的经济性差、安全性得不到保证的问题，提出一种利用太阳能热风再循环的管道应急解冻装置。The purpose of this invention is to overcome the problems of poor economy and unguaranteed safety in the technology of electric heat tracing, steam heat tracing or hot water heat tracing to realize pipeline thawing, and propose an emergency thawing device for pipelines using solar hot air recirculation .
为实现所述的发明目的，本发明采用的技术方案如下：For realizing described purpose of the invention, the technical scheme that the present invention adopts is as follows:
一种利用太阳能热风再循环的管道应急解冻装置，包括：太阳能空气加热器、再循环风机、空气流量调节阀门、热空气套管和热风再循环管道。热空气套管内部安装有测量伴热空气的温度、压力以及流量的装置，测量装置安装在管道上预留的管座处，就地显示仪表位于保温层外，显示测量结果。热空气套管套装在需要伴热的主管道外周，与需要伴热的主管道同轴，包裹在同一储热保温层内。An emergency thawing device for pipes utilizing solar hot air recirculation, comprising: a solar air heater, a recirculation fan, an air flow regulating valve, a hot air sleeve and a hot air recirculation pipe. The hot air sleeve is equipped with a device for measuring the temperature, pressure and flow of the heating air. The measuring device is installed at the socket reserved on the pipe, and the local display instrument is located outside the insulation layer to display the measurement results. The hot air sleeve is set on the outer periphery of the main pipeline that needs heat tracing, is coaxial with the main pipeline that needs heat tracing, and is wrapped in the same heat storage insulation layer.
所述的再循环风机安装在热空气套管的进口处。所述的太阳能空气加热器位于再循环风机的出口处。空气流量调节阀门安装在热空气套管的出口与热风再循环管道的进口之间，用于调整热风再循环管道内的空气流量，从而控制管道伴热。热空气套管与热风再循环管道连通。热风再循环管道的出口与再循环风机相连接，再循环风机的出口连接太阳能空气加热器，太阳能空气加热器的出口连接热空气套管的进口，热空气套管的出口通过空气流量调节阀连接热风再循环管道。热风再循环管道与再循环风机连接。太阳能空气加热器、热空气套管、热风再循环管道再循环风机构成伴热循环回路，为主管道伴热。热风再循环管路外包裹有储热保温层保温。The recirculation fan is installed at the inlet of the hot air casing. The solar air heater is located at the outlet of the recirculation fan. The air flow regulating valve is installed between the outlet of the hot air sleeve and the inlet of the hot air recirculation pipe, and is used to adjust the air flow in the hot air recirculation pipe, thereby controlling the heat tracing of the pipe. The hot air sleeve communicates with the hot air recirculation pipe. The outlet of the hot air recirculation pipe is connected to the recirculation fan, the outlet of the recirculation fan is connected to the solar air heater, the outlet of the solar air heater is connected to the inlet of the hot air sleeve, and the outlet of the hot air sleeve is connected through the air flow regulating valve Hot air recirculation duct. The hot air recirculation pipe is connected with the recirculation fan. The solar air heater, the hot air casing, and the hot air recirculation pipe recirculation fan form a heat tracing loop, which is used to trace heat to the main pipe. The hot air recirculation pipeline is wrapped with a heat storage insulation layer for insulation.
太阳能空气加热器加热再循环风机吹入的空气，形成伴热用的热风。热风进入热空气套管，加热与热空气套管平行布置的主管道，为主管道伴热，实现主管道的解冻。热风经热空气套管的出口经过热风再循环管道进入再循环风机，提高压头，然后再次进入空气加热器加热，驱动热风在热空气套管内循环。热风通过不断的循环，利用太阳能空气加热器和储热中的热量实现对主管道的连续伴热。再循环风机出口通过法兰螺栓与空气加热器连接，法兰间加装密封垫片密封。太阳能空气加热器与热空气套管、热空气套管与空气流量调节阀门、空气流量调节阀门与热风再循环管道、热风再循环管道与再循环风机之间也采用法兰加装密封垫片的联接方式，方便装置的检修作业。The solar air heater heats the air blown by the recirculation fan to form hot air for heat tracing. The hot air enters the hot air sleeve, heats the main pipeline parallel to the hot air sleeve, heats the main pipeline, and realizes the thawing of the main pipeline. The hot air enters the recirculation fan through the hot air recirculation pipe through the outlet of the hot air sleeve to increase the pressure head, and then enters the air heater again for heating, driving the hot air to circulate in the hot air sleeve. The hot air is continuously circulated, and the heat in the solar air heater and heat storage is used to realize the continuous heat tracing of the main pipeline. The outlet of the recirculation fan is connected to the air heater through flange bolts, and sealing gaskets are installed between the flanges for sealing. Flanges are also installed with sealing gaskets between solar air heaters and hot air sleeves, hot air sleeves and air flow regulating valves, air flow regulating valves and hot air recirculation pipes, hot air recirculation pipes and recirculation fans The connection method is convenient for the maintenance of the device.
本发明具有以下特征：The present invention has the following characteristics:
1、采用太阳能空气伴热的方式，可以避免采用电伴热、热水或蒸汽伴热时，伴热系统发生故障时，导致的解冻装置失效问题。减少排放，1. The use of solar air heat tracing can avoid the failure of the thawing device caused by the failure of the heat tracing system when electric heat tracing, hot water or steam heat tracing is used. emission reduction,
2、采用与主管道包裹在同一保储热温层内，平行布置在主管道外侧的同圆心热空气套管，可以降低管道的散热损失，储热延长伴热时间，增强热空气和解冻的效果。2. The hot air casing with the same circle as the main pipeline is wrapped in the same thermal storage layer and arranged parallel to the outside of the main pipeline, which can reduce the heat dissipation loss of the pipeline, heat storage and prolong the heat tracing time, and enhance the effect of hot air and thawing. Effect.
3、采用热风再循环的方式，可以使太阳能空气加热器进口空气温度升高，提高出口热风温度，强化管道和解冻效果，缩短热风伴热运行时间，降低伴热系统耗电量。3. The hot air recirculation method can increase the inlet air temperature of the solar air heater, increase the outlet hot air temperature, strengthen the pipeline and thawing effect, shorten the hot air heating running time, and reduce the power consumption of the heating system.
4、采用空气作为伴热系统的工质，在伴热系统发生泄露后对环境造成影响比较小。4. Air is used as the working medium of the heat tracing system, and the impact on the environment is relatively small after the heat tracing system leaks.
5、太阳能热风伴热系统空气温度和压力较低，热空气套管、再循环风机和空气加热器等设备的使用寿命较长。5. The air temperature and pressure of the solar hot air heating system are low, and the service life of hot air sleeves, recirculation fans and air heaters and other equipment is longer.
6、可通过空气流量调节阀门调节热风伴热管内的空气流量，应对不同环境时的解冻速度要求。6. The air flow in the hot air heating pipe can be adjusted through the air flow regulating valve to meet the thawing speed requirements in different environments.
7、热空气套管与主管道平行布置，在不影响主管道系统正常运行的前提下，方便实现伴热系统的检修和维护。7. The hot air casing is arranged in parallel with the main pipeline, which facilitates the inspection and maintenance of the heat tracing system without affecting the normal operation of the main pipeline system.
8、太阳能空气加热器出口的热风经过热空气套管后温度下降，在再循环风机的作用下，重新进入空气加热器，提高了空气加热器进口空气温度，减小了空气加热器的热损耗。8. The temperature of the hot air at the outlet of the solar air heater goes through the hot air sleeve and the temperature drops. Under the action of the recirculation fan, it re-enters the air heater, which increases the air temperature at the inlet of the air heater and reduces the heat loss of the air heater. .
附图说明Description of drawings
图1a为本发明的结构组成示意图，图1b为图1a的A-A剖面图，图中：1储热保温层，2主管道，3热空气套管，4再循环风机，5太阳能空气加热器，6热风再循环管道，7空气流量调节阀门。Fig. 1a is a schematic diagram of the structure of the present invention, and Fig. 1b is a sectional view of A-A of Fig. 1a, in the figure: 1 thermal insulation layer, 2 main pipes, 3 hot air sleeves, 4 recirculation fans, 5 solar air heaters, 6 hot air recirculation pipe, 7 air flow regulating valve.
具体实施方式detailed description
下面结合附图和具体实施方式进一步说明本发明。The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
如图1所示，本发明利用太阳能热风实现管道应急解冻装置，包括：As shown in Figure 1, the present invention utilizes solar hot air to realize pipeline emergency thawing device, including:
太阳能空气加热器5，所述的太阳能空气加热器5布置在再循环风机的出口处，对再循环风机出口处的空气加热。太阳能空气加热器5作为伴热的热源。The solar air heater 5, the solar air heater 5 is arranged at the outlet of the recirculation fan, and heats the air at the outlet of the recirculation fan. The solar air heater 5 is used as a heat source for heat tracing.
再循环风机4，所述的再循环风机4布置在热空气套管3的出口处，位于太阳能空气加热器5之前。再循环风机4对伴热后温度、压头降低的空气进行增压，保证热空气套管内热空气的流动。The recirculation fan 4 is arranged at the outlet of the hot air sleeve 3 and before the solar air heater 5 . The recirculation blower 4 pressurizes the air whose temperature and pressure head are lowered after heat tracing, so as to ensure the flow of hot air in the hot air casing.
空气流量调节阀门7，所述的空气流量调节阀门7安装在热空气套管3的出口与热风再循环管道6的进口之间。The air flow regulating valve 7 is installed between the outlet of the hot air sleeve 3 and the inlet of the hot air recirculation pipe 6 .
热空气套管3，所述的热空气套管3套装在需要伴热的主管道2外周，与主管道2同轴，并与主管道2包裹在同一储热保温层1内。空气加热器5的出口连接热空气套管3的进口，热空气套管3的出口连接热风再循环管道6，热空气套管3与热风再循环管道6连通。The hot air sleeve 3, the hot air sleeve 3 is set on the outer periphery of the main pipeline 2 that needs heat tracing, coaxial with the main pipeline 2, and wrapped in the same heat storage insulation layer 1 with the main pipeline 2. The outlet of the air heater 5 is connected to the inlet of the hot air sleeve 3 , the outlet of the hot air sleeve 3 is connected to the hot air recirculation pipeline 6 , and the hot air sleeve 3 communicates with the hot air recirculation pipeline 6 .
热风再循环管道6，所述的热风再循环管道6的进口和热空气套管3连接，热风再循环管道6的出口和再循环风机4连接；热风再循环管道6外包裹有保温层，以减小散热。The hot air recirculation pipe 6, the inlet of the hot air recirculation pipe 6 is connected with the hot air casing 3, the outlet of the hot air recirculation pipe 6 is connected with the recirculation fan 4; the hot air recirculation pipe 6 is wrapped with an insulation layer, so as to Reduce heat dissipation.
太阳能空气加热器5、再循环风机4、空气流量调节阀门之间通过热空气套管3、热风再循环管道6连接在一起。再循环风机4的出口连接太阳能空气加热器5，太阳能空气加热器5出口连接热空气套管3，热空气套管3出口连接空气流量调节阀门7，空气流量调节阀门7的出口连接热风再循环管道6，热风再循环管道6连接到再循环风机4，构成循环回路。在热空气套管3内部安装有测量伴热空气温度，压力以及流量的装置，测量装置安装在管道上预留的管座处，就地显示仪表位于保温层外，显示测量结果，实现对本发明伴热系统热力参数的测量。The solar air heater 5, the recirculation fan 4, and the air flow regulating valve are connected together through the hot air sleeve 3 and the hot air recirculation pipe 6. The outlet of the recirculation fan 4 is connected to the solar air heater 5, the outlet of the solar air heater 5 is connected to the hot air sleeve 3, the outlet of the hot air sleeve 3 is connected to the air flow regulating valve 7, and the outlet of the air flow regulating valve 7 is connected to the hot air recirculation The pipeline 6 and the hot air recirculation pipeline 6 are connected to the recirculation fan 4 to form a circulation loop. A device for measuring the temperature, pressure and flow of the heating air is installed inside the hot air sleeve 3. The measuring device is installed at the socket reserved on the pipeline, and the on-site display instrument is located outside the insulation layer to display the measurement results, realizing the realization of the present invention. Measurement of thermal parameters of heating system.
本发明的工作过程如下：Working process of the present invention is as follows:
空气经过太阳能热空气加热器5加热后温度升高，进入热空气套管3，对主管道2进行伴热，实现主管道的应急解冻。热风经过热空气套管3后温度降低，进入热风再循环管道6，在再循环风机4的作用下提高压头，重新进入空气加热器5加热。布置在热空气套管3内的测量伴热空气温度、压力、流量的装置监测本发明伴热系统的运行数据。通过布置在热风再循环管道6进口处的空气流量调节阀门7调节热风再循环管道6中的空气流量，由于热空气套管进口空气是太阳能空气加热器出口处的空气，温度较高，为防止空气流量调节阀门处于较高温度环境运行导致的损坏，所以将空气流量调节阀门布置在热风再循环管道进口处，此处空气经过热空气套管后温度下降，可以保证空气流量调节阀门的正常工质。本发明可以在不影响主管道运行的前提下，对伴热系统进行停运和检修等作业。After the air is heated by the solar hot air heater 5, the temperature rises and enters the hot air sleeve 3 to heat the main pipeline 2 to realize emergency thawing of the main pipeline. After the hot air passes through the hot air sleeve 3, the temperature decreases, and enters the hot air recirculation pipeline 6. Under the action of the recirculation fan 4, the pressure head is increased, and then re-enters the air heater 5 for heating. The device for measuring the temperature, pressure and flow rate of the heating air arranged in the hot air sleeve 3 monitors the operation data of the heating system of the present invention. The air flow in the hot blast recirculation pipeline 6 is regulated by the air flow regulating valve 7 arranged at the inlet of the hot blast recirculation pipeline 6. Since the air at the inlet of the hot air sleeve is the air at the outlet of the solar air heater, the temperature is relatively high. In order to prevent The air flow regulating valve is damaged due to operation in a higher temperature environment, so the air flow regulating valve is arranged at the inlet of the hot air recirculation pipe, where the temperature of the air passing through the hot air sleeve drops, which can ensure the normal operation of the air flow regulating valve quality. The invention can stop and overhaul the heat tracing system without affecting the operation of the main pipeline.
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