Condensed water waste heat utilization device

Abstract

The utility model belongs to the field of condensed water recovery devices, and particularly relates to a condensed water waste heat utilization device which comprises a plurality of reboilers, each reboiler is provided with a condensed water pipe, all the condensed water pipes are connected with a heat preservation tank after being gathered, and a preheater is arranged on one side of the heat preservation tank and comprises a water inlet pipe and a water outlet pipe. A hot water pipe connected with the preheater is arranged on the heat preservation tank, a liquid phase pump is arranged on the hot water pipe, a water storage tank is arranged on one side of the preheater and connected with a water outlet pipe, a direct discharge pipe is arranged between the hot water pipe and the water outlet pipe, a three-way switching valve is arranged between the direct discharge pipe and the water inlet pipe and between the direct discharge pipe and the hot water pipe, and a first check valve is arranged on the water outlet pipe. And a drain valve is arranged on the water storage tank. Compared with the prior art, the waste heat utilization device has the advantages that the energy utilization efficiency is remarkably improved and the production cost is reduced by efficiently recovering and reutilizing the waste heat of the steam condensate water generated by the reboiler.

Description

Technical Field

[0001] The utility model belongs to the field of condensate recovery devices, and in particular relates to a condensate waste heat utilization device. Background Art

[0002] In current rubber production processes, reboilers, key equipment in processes such as solvent refining, solvent de-weighting, and butadiene recovery, are typically heated using low-pressure steam. However, after completing their heat exchange tasks, the steam condensate produced by these reboilers is often directly recycled back into the pipeline network, ignoring the large amount of high-temperature waste heat contained therein, resulting in significant energy waste.

[0003] Traditional condensate treatment methods not only limit the comprehensive utilization efficiency of energy but also increase energy consumption costs during the production process, which is contrary to the current concept of energy conservation, emission reduction, and green production. Therefore, it is particularly important to develop a device that can effectively recover and utilize the waste heat of steam condensate. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a condensate waste heat utilization device to solve the above-mentioned problems.

[0005] The utility model provides a condensate waste heat utilization device, including several reboilers, each reboiler is provided with a condensate pipe, all the condensate pipes are collected and connected to an insulation tank, a preheater is provided on one side of the insulation tank, the preheater includes a water inlet pipe and a water outlet pipe, the insulation tank is provided with a hot water pipe connected to the preheater, the hot water pipe is provided with a liquid phase pump, a water storage tank is provided on one side of the preheater, the water storage tank is connected to the water outlet pipe, a straight pipe is provided between the hot water pipe and the water outlet pipe, a three-way switching valve is provided between the straight pipe and the water inlet pipe and the hot water pipe, a first check valve is provided on the water outlet pipe; and a drain valve is provided on the water storage tank.

[0006] Furthermore, each of the condensate pipes is provided with a second check valve.

[0007] Furthermore, the condensate pipe and the hot water pipe are both 304 stainless steel pipes, and the insulation tank is a 304 stainless steel tank.

[0008] Furthermore, the outer walls of the condensing water pipe, the hot water pipe and the insulation tank are all provided with insulation layers.

[0009] Furthermore, a flow meter is provided on the hot water pipe.

[0010] Furthermore, both the heat preservation tank and the water storage tank are provided with liquid level gauges.

[0011] Furthermore, a vent valve is provided on the heat preservation tank.

[0012] Compared with existing technologies, this waste heat recovery device significantly improves energy efficiency and reduces production costs by efficiently recovering and reusing the waste heat from steam condensate generated in the reboiler. Its flexible piping design and three-way switching valve enable the system to automatically adjust its operating mode based on production load, while ensuring operational safety and stable system operation, achieving the dual goals of energy conservation and emission reduction, as well as green production. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] In the figure: 1. Reboiler; 2. Condensate pipe; 3. Insulation tank; 4. Preheater; 5. Water inlet pipe; 6. Water outlet pipe; 7. Hot water pipe; 8. Liquid phase pump; 9. Water storage tank; 10. Straight discharge pipe; 11. Three-way switching valve; 12. First check valve; 13. Drain valve; 14. Second check valve; 15. Flow meter; 16. Liquid level gauge; 18. Vent valve. DETAILED DESCRIPTION

[0015] In order to better understand the present invention, Figure 1 The embodiments of the present invention will be explained in detail.

[0016] It should be noted that the directions “front, back, left, right, up, down” mentioned in the text are all based on Figure 1 The directions of “front, back, left, right, up and down” are used as the reference.

[0017] The present invention provides a condensate waste heat utilization device, comprising several reboilers 1 installed on production lines at different stages of the chemical production process to heat process media. Each reboiler 1 is equipped with a condensate pipe 2 for collecting steam condensate generated during the heating process. These condensate pipes 2 ultimately converge and connect to a common insulation tank 3. To prevent condensate backflow, each condensate pipe 2 is also equipped with a second check valve 14.

[0018] The holding tank 3 is made of 304 stainless steel, which has excellent corrosion resistance and heat preservation properties. It is used to temporarily store the condensed water collected from each reboiler 1. The outer wall of the holding tank 3 is covered with an insulation layer to reduce heat loss and maintain the high temperature of the condensed water.

[0019] A preheater 4 is installed on one side of the insulation tank 3 and connected to the insulation tank 3 via a hot water pipe 7. A liquid phase pump 8 is installed on the hot water pipe 7 to transport the high-temperature condensed water from the insulation tank 3 to the preheater 4 for heat exchange. The preheater 4 includes an inlet pipe 5 and an outlet pipe 6, which are used to introduce the medium to be preheated (such as raw water) and discharge the preheated medium.

[0020] To increase system flexibility, a straight-line pipe 10 is installed between the hot water pipe 7 and the outlet pipe 6. A three-way switching valve 11 connects the straight-line pipe 10 to the water inlet pipe 5 and the hot water pipe 7. The three-way switching valve 11 allows the output path of the hot water pipe 7 to be switched between the water inlet pipe 5 and the straight-line pipe 10, allowing the condensed water to flow in the desired direction. To drain the condensed water directly, the valve on the hot water pipe 7 is closed and the valve on the straight-line pipe 10 is opened, allowing the condensed water to drain through the straight-line pipe 10.

[0021] A water storage tank 9 is located on one side of the preheater 4 to recover and store the preheated medium. This tank is connected to the preheater 4 via an outlet pipe 6, which is equipped with a first check valve 12 to prevent backflow of the medium. A drain valve 13 is also provided on the tank 9 for connecting to other equipment that can use condensed water as a water source, or directly to a wastewater discharge pipeline.

[0022] In order to better monitor and manage the system, a flow meter 15 is also provided on the hot water pipe 7 for monitoring the flow of condensed water; a liquid level gauge 16 is provided on both the insulation tank 3 and the water storage tank 9 for real-time monitoring of the liquid level in the tank; a drain valve 18 is also provided on the insulation tank 3 for draining the medium in the tank during system maintenance or failure.

[0023] Taking into account the corrosion resistance and thermal insulation performance of the pipeline, the condensate pipe 2 and the hot water pipe 7 are both 304 stainless steel pipes, and the outer walls of the condensate pipe 2, the hot water pipe 7 and the insulation tank 3 are all provided with an insulation layer, which is preferably a polyurethane foam layer.

[0024] The usage and principle of this utility model:

[0025] During the chemical production process, steam condensate from each reboiler 1 flows through condensate pipe 2 into insulation tank 3. Driven by liquid phase pump 8, the condensate in insulation tank 3 flows through hot water pipe 7 into preheater 4, where it heats the preheated medium introduced through water inlet pipe 5. The preheated medium flows through outlet pipe 6 into water storage tank 9 for standby use. When the liquid level in insulation tank 3 reaches the set upper limit, the excess condensate can be diverted to the inline discharge pipe 10 for discharge via a three-way switching valve 11, or it can be used for other heating processes as required by the system.

[0026] In addition to the aforementioned functions, this waste heat utilization device can flexibly select the direction of condensed water flow by adjusting the position of three-way switching valve 11 according to changes in production load and preheating requirements. For example, when production load is high and preheating requirements are high, the valve on the inline pipe 10 can be closed to ensure that all condensed water is used in the preheating process. When production load is low and preheating requirements are low, the valve on the inline pipe 10 can be opened to directly discharge some or all of the condensed water, saving system energy.

[0027] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication between two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A condensate waste heat utilization device, characterized by: The invention comprises a plurality of reboilers (1), each of which is provided with a condensed water pipe (2), all of which are collected and connected to a heat preservation tank (3), a preheater (4) is provided on one side of the heat preservation tank (3), the preheater (4) comprises a water inlet pipe (5) and a water outlet pipe (6), the heat preservation tank (3) is provided with a hot water pipe (7) connected to the preheater (4), the hot water pipe (7) is provided with a liquid phase pump (8), and the heat preservation tank (3) is provided with a plurality of reboilers (1), each of which is provided with a condensed water pipe (2), all of which are collected and connected to a heat preservation tank (3), and the heat preservation tank (3) is provided with a preheater (4), the preheater (4) comprises a water inlet pipe (5) and a water outlet pipe (6), the heat preservation tank (3) is provided with a hot water pipe (7) connected to the preheater (4), the hot water pipe (7 A water storage tank (9) is provided on one side of the preheater (4), the water storage tank (9) is connected to the water outlet pipe (6), a straight pipe (10) is provided between the hot water pipe (7) and the water outlet pipe (6), a three-way switching valve (11) is provided between the straight pipe (10), the water inlet pipe (5) and the hot water pipe (7), and a first check valve (12) is provided on the water outlet pipe (6); and a drain valve (13) is provided on the water storage tank (9).

2. A condensate waste heat utilization device as claimed in claim 1, characterized in that: Each of the condensate water pipes (2) is provided with a second check valve (14).

3. The condensate waste heat utilization device according to claim 1, characterized in that: The condensed water pipe (2) and the hot water pipe (7) are both 304 stainless steel pipes, and the heat preservation tank (3) is a 304 stainless steel tank.

4. A condensate waste heat utilization device as claimed in claim 3, characterized in that: The outer walls of the condensed water pipe (2), the hot water pipe (7) and the heat preservation tank (3) are all provided with a heat preservation layer.

5. The condensate waste heat utilization device as claimed in claim 1, characterized in that: The hot water pipe (7) is provided with a flow meter (15).

6. The condensate waste heat utilization device according to claim 1, characterized in that: The heat preservation tank (3) and the water storage tank (9) are both provided with liquid level gauges (16).

7. The condensate waste heat utilization device according to claim 1, characterized in that: The heat-insulating tank (3) is provided with a vent valve (18).

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