A steam energy-saving centralized drainage system

Abstract

The present invention relates to the technical field of steam heating systems, and specifically to a steam energy-saving centralized drain system, comprising a boiler, a steam cylinder, heat-using equipment, a centralized drain device, a soft water tank, a soft water pump, and a deaerator connected in sequence; the bottom of the deaerator is connected to the boiler through a pipeline provided with a water supply pump, forming a completely closed recovery of condensate; the heat-using equipment is arranged in multiple groups and arranged in parallel, one end of the heat-using equipment is a steam inlet, and the other end is a condensate outlet, the steam inlet is connected to the steam cylinder, and the condensate outlet is connected to the centralized drain device. The present invention arranges multiple groups of heat-using equipment in parallel, so that the condensate is collected in the centralized drain device, and there is no need to set up many drain valves, thereby realizing the centralized drain function. At the same time, the steam in the system cannot pass through the condensate, thereby avoiding the problem of leakage.

Description

Technical Field

[0001] The invention relates to the technical field of steam heating systems, and in particular to a steam energy-saving centralized drain system. Background Art

[0002] In traditional steam heating systems, each device is equipped with at least one steam trap, and there are many steam traps. Whether the condensate recovery system works properly depends on whether each steam trap works properly. For example, if the steam trap is blocked, it will lead to poor drainage, equipment temperature drop, and tire undersulfurization; if the steam trap is stuck and not closed tightly, it will lead to steam leakage and waste of steam; if the condensate cannot be drained back, it will cause system back pressure and the vulcanizer will open a bypass to discharge; if there are many steam traps, it will lead to a large workload for on-site maintenance, which will waste manpower and material resources.

[0003] At present, many equipment and transportation methods for recovering high-temperature condensate have been developed at home and abroad, but most of them focus on: how to choose a suitable steam trap for each equipment: thermal power, thermal static, float type, inverted bucket type, etc.; how to collect and transport the condensate discharged from the steam trap. But no comprehensive consideration is given to how to efficiently use heat energy in heat-using equipment, how to effectively collect condensate, and how to adopt effective methods to transport condensate. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and propose a steam energy-saving centralized drain system, which eliminates many traditional steam traps or cut-off valves, can realize the function of centralized draining in the heating system of hundreds of vulcanizers, is efficient and energy-saving, and avoids poor drainage.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] A steam energy-saving centralized drain system includes a boiler, a steam cylinder, a heat-using device, a centralized drain device, a soft water tank, a soft water pump, and a deaerator connected in sequence; the bottom of the deaerator is connected to the boiler through a pipeline provided with a water supply pump, so as to form a completely closed recovery of condensate; the heat-using device is provided in multiple groups and arranged in parallel, one end of the heat-using device is a steam inlet, and the other end is a condensate outlet, the steam inlet is connected to the steam cylinder, and the condensate outlet is connected to the centralized drain device. The multiple groups of heat-using devices are arranged in parallel, so that the condensate is collected in the centralized drain device, and there is no need to set up many drain valves, so the centralized drain function is realized. At the same time, the steam in the system cannot pass through the condensate, thereby avoiding the problem of leakage.

[0007] Furthermore, one end of each group of heat-using equipment is connected to a branch pipe 1, all branch pipes 1 are connected to the main pipe 1, and the main pipe 1 is connected to the sub-cylinder; the other end of each group of heat-using equipment is connected to a branch pipe 2, all branch pipes 2 are connected to the main pipe 2, and the main pipe 2 is connected to the centralized drain device. The condensate is drained through the branch pipe 2, collected in the main pipe 2, and precisely adjusted by the centralized drain device to ensure a relatively stable water level in the branch pipe 2. At the same time, the main pipe 2 is filled with condensate in a single liquid phase, so that the steam in the system cannot pass through the condensate and leak; the drain system eliminates many drain valves (or cut-off valves), realizes centralized draining in the heating system of hundreds of vulcanizers, and is highly efficient and energy-saving, avoiding poor drainage; at the same time, the condensate can be completely recovered in a closed manner.

[0008] Furthermore, the branch pipe 2 is provided with a water level control line to better control the water level in the branch pipe 2.

[0009] Furthermore, the centralized drainage device is divided into two or more areas by a partition, which effectively alleviates the drainage difficulties caused by excessive water.

[0010] Furthermore, the centralized drain device is divided into two areas by a partition; the bottom of one area is connected to the main pipe two, and the tops of the two areas are respectively connected to the main pipe three through a branch pipe three, and the main pipe three is connected to the soft water tank. Through the pressure regulating function of the centralized drain device, the outlet pressure of the device is set as needed, so that the entire condensate recovery system forms a pressure gradient from high to low without top steam.

[0011] Furthermore, the main pipe three is connected to the deaerator through a branch pipe four. When there is too much water in the soft water tank, the branch pipe four can directly enter the deaerator to avoid the excessive water in the soft water tank affecting the operation of the entire drainage system.

[0012] Furthermore, the steam energy-saving centralized drain system has a drain capacity of 0-4 t / h.

[0013] Technical effects of the present invention:

[0014] Compared with the prior art, the steam energy-saving centralized drain system of the present invention has the following advantages:

[0015] 1. High efficiency and energy saving: Saving steam: after testing, the steam saving is between 18%-22%;

[0016] 2. No power: No condensate pump is required, no additional power is required, and the condensate's own pressure is fully utilized for transportation without consuming electricity;

[0017] 3. Closed type: The system is completely closed and operates under pressure, without secondary steam leakage, no air mixing and condensation; no oxygen corrosion in water and pipelines; the system thermal efficiency is nearly 100%;

[0018] 4. Centralized drainage: For vulcanizers with basically the same steam pressure, a large number of steam traps are eliminated, centralized drainage is achieved, and a virtuous cycle of the heating system is realized;

[0019] 5. Easy management and maintenance: The system has a simple structure, is convenient and practical, greatly improves the working environment of workers, eliminates the direct exhaust of steam from the original steam trap on site, and greatly reduces the cost and maintenance workload of frequent replacement of a large number of steam traps, reducing management by more than 90%;

[0020] 6. Stable vulcanization temperature: changing intermittent hydrophobicity to continuous hydrophobicity solves the problem of temperature drop of steam resistance hot plate;

[0021] 7. Accurate vulcanization temperature: The temperatures of multiple vulcanizers are basically the same, which solves the problem of inaccurate (drift) display of thermal resistance and temperature change, and ensures that the actual temperature and displayed temperature are accurate;

[0022] 8. Simple and reliable operation: There are no electronically controlled valves or valves that need to be switched frequently, and personnel are not required to regularly check and operate the equipment for self-regulation.

[0023] 9. Solve the problem of thermal engine bypass: The equipment has large channels, large flow, and a wide flow range. A single device can vary the drainage volume in the range of 0~4t / h, and the thermal engine does not need to be bypassed;

[0024] 10. Wide range of applications: The equipment can be connected in parallel to solve the use of different pressures and different flow rates, and is easy to install and construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structural principle of the steam energy-saving centralized drain system of the present invention.

[0026] In the figure, boiler 1, steam cylinder 2, heat-consuming equipment 3, centralized drain device 4, soft water tank 5, soft water pump 6, deaerator 7, water pump 8, branch pipe 1 9, main pipe 1 10, branch pipe 2 11, main pipe 2 12, branch pipe 3 13, main pipe 3 14, branch pipe 4 15, water level control line 16, and pipeline 17. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention is clearly and completely described below in conjunction with the accompanying drawings.

[0028] Example:

[0029] like Figure 1 As shown, the present embodiment involves a steam energy-saving centralized drain system, comprising a boiler 1, a steam cylinder 2, a heat-using device 3, a centralized drain device 4, a soft water tank 5, a soft water pump 6, and a deaerator 7 connected in sequence.

[0030] The bottom of the deaerator 7 is connected to the boiler 1 through a pipeline 17 provided with a water feed pump 8, so as to form a completely closed recovery of condensed water.

[0031] The heat-using equipment 3 is arranged in multiple groups and in parallel. One end of the heat-using equipment 3 is a steam inlet and the other end is a condensate outlet. The steam inlet is connected to the steam cylinder 2, and the condensate outlet is connected to the centralized drain device 4. The multiple groups of heat-using equipment 3 are arranged in parallel, so that the condensate is collected in the centralized drain device 4, and there is no need to set up many drain valves, so the centralized drain function is realized. At the same time, the steam in the system cannot pass through the condensate, thereby avoiding the problem of leakage.

[0032] One end of each group of heat-using equipment 3 is connected to a branch pipe 1 9, all branch pipes 1 9 are connected to the main pipe 10, and the main pipe 10 is connected to the steam cylinder 2; the other end of each group of heat-using equipment 3 is connected to a branch pipe 2 11, all branch pipes 2 11 are connected to the main pipe 2 12, and the main pipe 2 12 is connected to the centralized drain device 4; the branch pipe 2 11 is provided with a water level control line 16. The condensate is drained through the branch pipe 2 11, collected in the main pipe 2 12, and finely adjusted by the centralized drain device 4 to ensure that there is a relatively stable water level in the branch pipe 2 11, and at the same time, the main pipe 2 12 is filled with condensate in a single liquid phase, so that the steam in the system cannot pass through the condensate and leak; the drain system eliminates many drain valves (or cut-off valves), realizes centralized draining in the heating system of hundreds of vulcanizers, and is highly efficient and energy-saving, avoiding poor drainage; at the same time, the condensate is completely recovered in a closed manner, and the utilization rate of steam heat energy in the entire system is close to 100%.

[0033] The centralized drain device 4 is divided into area A and area B by a partition. The bottom of area A is connected to the main pipe 2 12, and the tops of areas A and B are respectively connected to the main pipe 3 14 through a branch pipe 3 13. The main pipe 3 14 is connected to the soft water tank 5, and the main pipe 3 14 is connected to the deaerator 7 through a branch pipe 4 15. When the amount of water in the soft water tank 5 is too much, the branch pipe 4 15 can directly enter the deaerator 7 to avoid the excessive amount of water in the soft water tank 5 affecting the operation of the entire drain system; the drain capacity of the steam energy-saving centralized drain system is 0~4t / h.

[0034] The steam energy-saving centralized drain system of the present invention eliminates the drain valve. The condensate is drained through the branch pipe 11 and collected in the main pipe 12. It is precisely adjusted by the centralized drain device 4 to ensure that there is a relatively stable water level in the branch pipe 11. At the same time, the main pipe 12 is filled with condensate in a single liquid phase, and the steam in the system cannot pass through the condensate to cause leakage. Through the pressure regulation function of the centralized drain device 4, the outlet pressure of the device is set as needed, so that the entire condensate recovery system forms a pressure gradient from high to low, and there is no steam backflow. The condensate of the present invention can be fully recovered in a closed manner, and the utilization rate of the steam heat energy of the entire system is close to 100%, which is highly efficient and energy-saving. For non-isobaric systems where equipment is running at different pressures, it can be configured through an array isobaric system, so as to realize the common network operation of condensate of different pressure levels. When in use, the temperatures of multiple vulcanizers are basically the same, which solves the problem of inaccurate (drift) display of thermal resistors and temperature change temperatures, and ensures the accuracy of the actual temperature and displayed temperature.

[0035] Since the present invention is a closed recovery, the back pressure of the condensate system is higher than that of the conventional system, and its thermal energy can be efficiently reused secondary according to specific circumstances. Possible utilization methods include: secondary flash steam is directly or pressurized and then reused in the low-pressure steam system; it is used for lithium bromide refrigeration in summer / heating in winter, etc.

[0036] Compared with the traditional steam heating system, the steam energy-saving centralized drain system of the present invention saves more than 17.96 tons of steam per day on average, and the energy saving rate reaches more than 19.6%, which greatly saves costs. In addition, through steam transformation, the condensate is discharged in time, which improves the tire vulcanization quality. At the same time, since the equipment is a maintenance-free and long-life device, the daily maintenance work is greatly reduced, and the cost of repairing and replacing the steam trap can be saved by about 80,000 yuan per year. At the same time, the maintenance work of the maintenance worker on the steam trap is greatly reduced, and the workload is reduced. At the same time, the hot water recovered by energy saving can be used for heating or cooling by the hot water refrigeration unit, so as to achieve the secondary utilization of energy and eliminate the thermal pollution of the secondary steam. The effect is remarkable and can be widely used in the tire industry.

[0037] The above-mentioned specific implementation modes are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the above-mentioned specific implementation modes. Any appropriate changes or modifications made thereto by any ordinary technician in the technical field in accordance with the claims of the present invention shall fall within the patent protection scope of the present invention.

Claims

1. A steam energy-saving centralized drain system, characterized in that: The invention comprises a boiler (1), a steam cylinder (2), a heat-using device (3), a centralized drain device (4), a soft water tank (5), a soft water pump (6), and a deaerator (7) which are connected in sequence; the bottom of the deaerator (7) is connected to the boiler (1) via a pipeline (17) provided with a water supply pump (8), so as to form a completely closed condensate recovery system; the heat-using device (3) is provided in multiple groups and is arranged in parallel, one end of the heat-using device (3) is a steam inlet, and the other end is a condensate outlet, and the steam inlet is connected to the steam cylinder ( 2) is connected, the condensate outlet is connected to the centralized drain device (4); the centralized drain device (4) is divided into more than two areas by a partition; the centralized drain device (4) is divided into two areas by a partition; the bottom of one area is connected to the main pipe 2 (12), and the tops of the two areas are respectively connected to the main pipe 3 (14) through a branch pipe 3 (13), and the main pipe 3 (14) is connected to the soft water tank (5); the main pipe 3 (14) and the deaerator (7) are connected through a branch pipe 4 (15).

2. The steam energy-saving centralized drain system according to claim 1 is characterized in that: One end of each group of heat-using equipment (3) is connected to a branch pipe 1 (9), all branch pipes 1 (9) are connected to a main pipe 1 (10), and the main pipe 1 (10) is connected to the sub-cylinder (2); the other end of each group of heat-using equipment (3) is connected to a branch pipe 2 (11), all branch pipes 2 (11) are connected to a main pipe 2 (12), and the main pipe 2 (12) is connected to a centralized drain device (4).

3. The steam energy-saving centralized draining system according to claim 2 is characterized in that: The branch pipe 2 (11) is provided with a water level control line (16).

4. The steam energy-saving centralized draining system according to any one of claims 1 to 3, characterized in that: The steam energy-saving centralized drain system has a drain capacity of 0-4 t / h.

Images