Energy-saving type steam heat tracing system

Abstract

The utility model relates to the technical field of heat exchange equipment, in particular to an energy-saving type steam heat tracing system. Comprising a heat tracing pipeline used for supplying heat to a main material pipeline; the starting end of the heat tracing pipeline is communicated with a steam source in a workshop, and the tail end of the heat tracing pipeline is inserted into condensed water in the water seal container; the steam inlet control valve is arranged near the starting end of the heat tracing pipeline; the heat tracing pipeline surface remote thermometer is arranged on the surface of the heat tracing pipeline; the material pipeline internal remote thermometer is arranged in the main material pipeline; a DCS operation station; a water seal container discharge port is formed in the upper half part of the side wall of the water seal container; the condensate recovery pool is communicated with the water seal container discharge port through a steam condensate discharge pipeline, and a gate valve is arranged on the steam condensate discharge pipeline. Whole-process control over material heat tracing is achieved, the purposes of convenience, rapidness and high efficiency are achieved, most importantly, steam is appropriately used, the utilization rate of the steam is increased, and the situation that the steam is wasted in process application is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to an energy-saving steam heating system. Background Art

[0002] Generally, during the production and operation of petrochemical plants, some materials have a high freezing point. In winter when the temperature is low, some pipelines or instruments need to be heated to prevent the materials from freezing.

[0003] At present, most chemical plants use steam heating. In winter, the steam usage is extremely high. At the same time, the steam is vented at the end in vain, resulting in low steam utilization rate. Utility Model Content

[0004] The utility model provides an energy-saving steam tracing system, the purpose of which is to avoid excessive waste of steam and improve the effective utilization rate of resources by optimizing steam supply and steam recovery.

[0005] To achieve the above purpose, the technical solution of the utility model is:

[0006] The utility model provides an energy-saving steam heating system, comprising:

[0007] The heating pipeline is used to heat the main material pipeline; its starting end is connected to the steam source in the workshop, and the end of the heating pipeline is inserted into the condensate in the water seal container described below;

[0008] A steam inlet control valve is used to control the amount of steam entering; it is arranged near the beginning of the heating pipeline;

[0009] A remote thermometer for the surface of the heating pipeline, used to detect the temperature of the surface of the heating pipeline; it is arranged on the surface of the heating pipeline;

[0010] A remote thermometer inside the material pipeline, used to detect the temperature of the material in the main material pipeline, which is arranged in the main material pipeline;

[0011] A DCS operation station is connected to the remote thermometer on the surface of the heating pipeline and the remote thermometer inside the material pipeline through signal lines, and controls the steam inlet control valve through a PID module;

[0012] A water seal container is provided with condensed water inside and an external discharge port of the water seal container is provided on the upper half of the side wall;

[0013] The condensate recovery pool is used to accommodate overflowed condensed water; it is connected to the external discharge port of the water seal container through a steam condensate discharge pipeline, and a gate valve is arranged on the steam condensate discharge pipeline.

[0014] Furthermore, the steam inlet control valve is a solenoid valve.

[0015] Furthermore, the number of the remote temperature transmitters on the surface of the heating pipeline is one or two.

[0016] Furthermore, the number of the remote temperature transmitter inside the material pipeline is one.

[0017] Furthermore, the steam heating system also includes a material pipeline surface remote thermometer, and the material pipeline surface remote thermometer is arranged on the surface of the main material pipeline.

[0018] Furthermore, the number of remote temperature transmitters inside the material pipeline is two.

[0019] The beneficial effects achieved by the utility model are:

[0020] The utility model is provided with three groups of thermometers to monitor the material pipeline and the steam pipeline, realizes the whole process control of the material heating, achieves the purpose of convenience, speed and efficiency, and most importantly, uses steam in an appropriate amount, improves the utilization rate of steam, and avoids the waste of steam in process application.

[0021] In addition, the utility model also recovers the steam at the end to achieve the recycling of the steam condensate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0024] In the figure, 1. heating pipeline; 2. main material pipeline; 3. steam inlet control valve; 4. remote thermometer on the surface of material pipeline; 5. remote thermometer on the surface of heating pipeline; 6. signal line; 7. DCS operation station; 8. remote thermometer inside material pipeline; 9. water seal container; 10. gate valve; 11. steam condensate discharge pipeline; 12. condensate recovery tank; 13. condensate; 14. PID module; 15. end of heating pipeline; 16. external discharge port of water seal container. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0028] The utility model provides an energy-saving steam heating system, which utilizes instrument automation technology to effectively combine the material pipeline temperature with the steam heating temperature, adopts a solenoid valve to adjust the heating pipeline temperature, effectively controls the steam volume and improves the steam utilization rate while ensuring the safe and stable operation of the material pipeline, and adopts a water seal condensate recovery system at the end 15 of the heating pipeline to effectively convert the end exhaust steam into condensate, thereby realizing the recycling of resources.

[0029] like Figure 1 As shown, the utility model includes:

[0030] The heat tracing pipeline 1 is used to supply heat to the main material pipeline 2 in the workshop; its starting end is connected to the steam source in the workshop, and the end 15 of the heat tracing pipeline is inserted into the condensate 13 in the water seal container 9 described below;

[0031] A steam inlet control valve 3 is used to control the amount of steam entering; it is arranged near the beginning of the heating pipeline 1;

[0032] The heating pipeline surface remote thermometer 5 is used to detect the temperature of the surface of the heating pipeline 1; it is arranged on the surface of the heating pipeline 1;

[0033] A remote thermometer 8 inside the material pipeline is used to detect the temperature of the material in the main material pipeline 2, and is arranged in the main material pipeline 2;

[0034] The DCS operation station 7 is connected to the remote thermometer 5 on the surface of the heating pipeline and the remote thermometer 8 inside the material pipeline through the signal line 6, and controls the steam inlet control valve 3 through the PID module 14;

[0035] A water seal container 9, wherein condensed water is arranged inside, and an external discharge port 16 of the water seal container is arranged at the upper half of the side wall;

[0036] The condensate recovery pool 12 is used to accommodate overflowed condensed water; it is connected to the external discharge port 16 of the water seal container through a steam condensate discharge pipeline 11, and a gate valve 10 is provided on the steam condensate discharge pipeline 11.

[0037] The arrangement of the heating pipeline 1 and the main material pipeline 2 is the prior art, and its arrangement does not affect the solution of the problem by the present invention, so the technical details thereof will not be elaborated in this article.

[0038] The steam inlet control valve 3 is a solenoid valve, which controls the opening and closing degree through electrical signals, and its power supply adopts 24VAC; the steam inlet control valve 3 is arranged at the beginning of the heating pipeline 1 to control the amount of steam entering, so as to accurately use steam and reduce waste.

[0039] The number of the heating pipeline surface remote thermometer 5 is one or two; when the number of the heating pipeline surface remote thermometer 5 is one, the heating pipeline surface remote thermometer 5 is arranged near the middle or near the end of the heating pipeline 1, so as to measure the surface temperature of the heating pipeline 1. Preferably, the number of the heating pipeline surface remote thermometer 5 is two, which are arranged near the middle and near the end of the heating pipeline 1, respectively, so as to more accurately monitor the surface temperature of the heating pipeline 1, and avoid the situation that the temperature in the middle of the heating pipeline 1 is appropriate but the temperature near the end is too low.

[0040] The number of the remote temperature transmitters 8 inside the material pipeline is one or two.

[0041] When the number of remote thermometers 8 inside the material pipeline is one, the steam heating system also includes a material pipeline surface remote thermometer 4; the material pipeline surface remote thermometer 4 is arranged on the surface of the main material pipeline 2, and the material pipeline surface remote thermometer 4 is used to detect the temperature of the surface of the main material pipeline 2; the purpose of this design is to prevent the remote thermometer 8 inside the material pipeline from being corroded and damaged by the material, causing the entire system to be paralyzed.

[0042] When there are two remote thermometers 8 inside the material pipeline, they are respectively arranged near the middle and the end of the main material pipeline 2 to more accurately monitor the temperature of the material inside the main material pipeline 2.

[0043] The DCS operation station 7 (Distributed Control System, DCS for short) is responsible for directly interacting with the operator, monitoring and controlling the production process. It is an outsourced part, and the specific principles and details are not repeated here. The DCS operation station 7 is respectively connected to the surface remote thermometer 5 of the heating pipeline, the internal remote thermometer 8 of the material pipeline, and the surface remote thermometer 4 of the material pipeline, and is used to receive temperature information and control the opening and closing degree of the steam inlet control valve 3 according to the temperature information, so as to realize accurate control of the amount of steam entering.

[0044] In addition, the operating personnel can timely grasp the operating status of the heating pipeline 1 from the DCS operating station 7, and adjust the overall steam flow of the heating pipeline 1 by changing the set value of the steam inlet control valve 3 according to actual production, so as to achieve the optimal solution for steam usage when the device ensures that the pipeline material does not freeze in extremely cold weather.

[0045] The PID module 14 adopts FM355 provided by Siemens, which is suitable for closed-loop control of pressure, temperature and flow rate; the PID module 14 may also adopt other models, which is only an example and does not constitute a limitation.

[0046] The software part of the utility model can be implemented by those skilled in the art according to the description without creative work, so the details are not described again.

[0047] The end 15 of the heating pipeline is inserted into the water seal container 9 filled with condensate 13 to form a steam-water mixture. When the condensate 13 rises to the external discharge port 16 of the water seal container, the condensate 13 is discharged to the existing condensate recovery pool 12 of the device through the steam condensate discharge pipeline 11 while ensuring that the external water discharge gate valve 10 is normally open, thereby realizing the recycling of steam condensate.

[0048] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An energy-saving steam heating system, characterized in that: include: A heat tracing pipeline (1) is used to provide heat to the main material pipeline (2); its starting end is connected to the steam source in the workshop, and the end (15) of the heat tracing pipeline is inserted into the condensate (13) in the water seal container (9) described below; A steam inlet control valve (3) for controlling the amount of steam entering; It is arranged near the starting end of the heating pipeline (1); A heating pipeline surface remote temperature transmitter (5) for detecting the surface temperature of the heating pipeline (1); It is arranged on the surface of the heating pipeline (1); A remote thermometer (8) inside the material pipeline, used for detecting the temperature of the material in the main material pipeline (2), and arranged in the main material pipeline (2); A DCS operating station (7) is connected to the remote thermometer (5) on the surface of the heating pipeline and the remote thermometer (8) inside the material pipeline through a signal line (6), and controls the steam inlet control valve (3) through a PID module (14); A water seal container (9) is provided with condensed water inside and an external discharge port (16) of the water seal container is provided on the upper half of the side wall; The condensate recovery pool (12) is used to contain overflowed condensate; it is connected to the external discharge port (16) of the water seal container through a steam condensate discharge pipeline (11), and a gate valve (10) is provided on the steam condensate discharge pipeline (11).

2. An energy-saving steam heating system according to claim 1, characterized in that: The steam inlet control valve (3) is a solenoid valve.

3. An energy-saving steam heating system according to claim 1, characterized in that: The number of the heating pipeline surface remote temperature meters (5) is one or two.

4. An energy-saving steam heating system according to any one of claims 1 to 3, characterized in that: The number of the remote temperature transmitter (8) inside the material pipeline is one.

5. An energy-saving steam heating system according to claim 4, characterized in that: The steam tracing system further comprises a material pipeline surface remote thermometer (4), and the material pipeline surface remote thermometer (4) is arranged on the surface of the main material pipeline (2).

6. An energy-saving steam heating system according to any one of claims 1 to 3, characterized in that: The number of the remote temperature transmitters (8) inside the material pipeline is two.

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