Ascending pipe heat energy recycling system

Abstract

The utility model discloses a heat energy recycling system of an ascending pipe, which comprises a desalting water tank, a heat exchanger, a heat exchanger and a heat exchanger, the dead steam recovery device is communicated with the demineralized water tank and is used for preheating normal-temperature demineralized water; the deaerator is communicated with the dead steam recovery device and is used for deoxidizing and heating the preheated demineralized water to generate deoxygenated water, and diffused exhaust gas of the deaerator enters the dead steam recovery device; the steam pocket is communicated with the deaerator, and diffused exhaust gas of the steam pocket enters the dead steam recovery device; the ascending pipe is communicated with the steam pocket, deoxygenated water circularly exchanges heat between the steam pocket and the ascending pipe, and after heat exchange, a steam-water mixture in the ascending pipe returns to the steam pocket to be subjected to steam-water separation; and the discharged water of the steam pocket enters the blowdown flash tank, the discharged gas of the blowdown flash tank enters the deaerator, and the discharged water enters the dead steam recovery device.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery and utilization technology of riser pipes, specifically to a heat energy recycling system for riser pipes. Background Technology

[0002] In recent years, the technology of coke oven gas riser pipe waste heat recovery system has gradually matured and become a standard feature in the construction and renovation of coke ovens in the coking industry. The deaerator in the riser pipe waste heat recovery system generates a large amount of steam and condensate due to deoxygenation requirements, necessitating venting and drainage for safe operation. Furthermore, the steam drum in the riser pipe waste heat recovery system is also a critical component. It typically includes drainage pipes to drain water and maintain the water level and pressure within safe ranges, as well as venting pipes to discharge gases (including steam and air) to ensure stable internal pressure and prevent the accumulation of oxygen and other gases, thus avoiding oxidation.

[0003] However, in current riser waste heat recovery systems, the exhaust and drainage from the deaerator and steam drum are generally discharged directly into the air and to the ground. This directly discharged water and gas actually contain a lot of heat energy, which results in a serious waste of energy. As an important technology for energy conservation and emission reduction in coking, it is essential to optimize and improve the riser waste heat recovery process. Utility Model Content

[0004] The purpose of this invention is to address the energy waste caused by exhaust and drainage in the deaerator and steam drum processes of existing riser heat recovery systems, and to design a riser heat energy recycling system that solves the above problems.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] This utility model designs a riser pipe heat energy recycling system, which includes:

[0007] Demineralized water tank, which is used to provide demineralized water at room temperature;

[0008] A waste steam recovery device is connected to the demineralized water tank and is used to preheat the demineralized water at room temperature.

[0009] A deaerator pump, used to supply demineralized water to the waste steam recovery unit;

[0010] The deaerator, which is connected to the exhaust steam recovery device, is used to deaerate and heat the preheated demineralized water to produce deoxygenated water. The exhaust gas from the deaerator enters the exhaust steam recovery device as a heat source for preheating the room temperature demineralized water.

[0011] A steam drum is connected to the deaerator, and the exhaust gas from the steam drum enters the waste steam recovery device as a heat source for preheating the ambient temperature demineralized water.

[0012] Circulating pump;

[0013] The riser pipe is connected to the steam drum. The deoxygenated water is circulated and heat-exchanged between the steam drum and the riser pipe by the circulating pump. After heat exchange, the steam-water mixture in the riser pipe returns to the steam drum for steam-water separation.

[0014] The steam drum discharges water into the wastewater discharge expansion container, the exhaust water from the wastewater discharge expansion container enters the deaerator, and the wastewater from the wastewater discharge expansion container enters the exhaust steam recovery device.

[0015] Specifically, the riser heat energy recycling system designed in this utility model is an improvement design to address the problem of energy and heat waste caused by the many defects in the existing riser waste heat recovery system. That is, a waste steam recovery device and a sewage expansion tank are added to the existing riser waste heat recovery system, which can recover and utilize the heat energy contained in the exhaust gas and drainage that are directly discharged into the air and to the ground from the deaerator and steam drum, thus avoiding energy waste.

[0016] Furthermore, in a riser heat energy recycling system, the waste steam recovery device is also connected to the demineralized water tank via a waste steam drain pipe.

[0017] Furthermore, a riser heat energy recycling system: the deaerator is connected to the exhaust steam recovery device through the deaerator vent pipe.

[0018] Furthermore, in a riser heat energy recycling system, the deaerator is also connected to the waste steam recovery device via a deaerator drain pipe.

[0019] Furthermore, a riser heat energy recycling system: the steam drum is connected to the waste steam recovery device through a steam drum vent pipe.

[0020] Furthermore, a riser heat energy recycling system: the steam drum is connected to the sewage expansion container through a steam drum drain pipe.

[0021] Furthermore, a riser heat energy recycling system: the sewage expansion container is connected to the deaerator through the expansion container exhaust pipe.

[0022] Furthermore, a riser heat energy recycling system: the sewage expansion container is connected to the waste steam recovery device through the expansion container drainage pipe.

[0023] The beneficial effects of this utility model are:

[0024] This invention improves and optimizes the existing coke oven riser pipe waste heat recovery system. Addressing the problem of heat energy waste caused by direct exhaust and drainage from the deaerator and steam drum in the existing system, this invention designs a riser pipe heat energy recycling system. By adding a waste steam recovery device and a blowdown expansion tank to the system, the heat energy in the exhaust and drainage from the deaerator and steam drum can be fully recycled, reducing energy consumption, enhancing the energy-saving effect of the riser pipe waste heat recovery system, and improving the system's economic efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a riser tube thermal energy recycling system designed for Embodiment 1 of this utility model.

[0027] The markings in the diagram are: 1-Demineralized water tank, 2-Waste steam recovery device, 3-Deaerator, 4-Steam drum, 5-Rising pipe, 6-Sewage expansion container, 7-Waste steam drain pipe, 8-Deaerator vent pipe, 9-Deaerator drain pipe, 10-Steam drum vent pipe, 11-Bubble drain pipe, 12-Expansion container exhaust pipe, 13-Expansion container drain pipe. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "top," and "bottom," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein.

[0030] Example 1

[0031] like Figure 1 As shown in the figure, this embodiment 1 designs a riser pipe heat energy recycling system, which includes the following:

[0032] Demineralized water tank 1 is used to provide demineralized water at room temperature. The demineralized water at room temperature in the demineralized water tank 1 is supplied to the waste steam recovery device 2 by a deoxygenation pump.

[0033] Waste steam recovery device 2 is connected to the demineralized water tank 2 and is used to preheat the demineralized water at room temperature. The waste steam recovery device 2 is also connected to the demineralized water tank 1 through waste steam drain pipe 7.

[0034] The deaerator 3 is connected to the waste steam recovery device 2 and is used to deaerate and heat the preheated demineralized water to produce deoxygenated water. The exhaust gas from the deaerator 3 enters the waste steam recovery device 2 through the deaerator vent pipe 8 as a heat source for preheating the room temperature demineralized water. The drainage water from the deaerator 3 enters the waste steam recovery device 2 through the deaerator drain pipe 9.

[0035] Steam drum 4 is connected to the deaerator 3, and the exhaust gas from the steam drum 4 enters the exhaust steam recovery device 2 through the steam drum exhaust pipe 10.

[0036] The riser pipe 5 is connected to the steam drum 4. The deoxygenated water is circulated and heat exchanged between the steam drum 4 and the riser pipe 5 by a circulating pump. After heat exchange, the steam-water mixture in the riser pipe 5 returns to the steam drum 4 for steam-water separation. The generated low-pressure saturated steam is sent from the top of the steam drum 4 to the steam separator.

[0037] And the wastewater expansion container 6, the drainage of the steam drum 4 enters the wastewater expansion container 6 through the steam drum drainage pipe 11, the exhaust of the wastewater expansion container 6 enters the deaerator 3 through the expansion container exhaust pipe 12, and the drainage of the wastewater expansion container 6 enters the waste steam recovery device 2 through the expansion container drainage pipe 13.

[0038] Example 1: Working principle of this riser heat energy recycling system:

[0039] First, the ambient temperature demineralized water output from the demineralized water station outlet pipe enters the demineralized water tank 1, and then is sent to the waste steam recovery device 2 for preheating through the deaerator pump. After the ambient temperature demineralized water is heated, it enters the deaerator 3 for deoxygenation and heating, producing deoxygenated water at about 104°C. Then the deoxygenated water enters the steam drum 4, and the circulating pump controls the deoxygenated water to circulate and exchange heat between the steam drum 4 and the riser pipe 5.

[0040] During this process, the deaerator 3 will generate a large amount of steam and condensate due to the need for deoxygenation. In order to ensure the safe operation of the system, it is necessary to exhaust and drain the steam. The steam and condensate in the deaerator 3 enter the waste steam recovery device 2 through the deaerator vent pipe 8 and the deaerator drain pipe 9, respectively, as a heat source for preheating the ambient temperature demineralized water. After completing the heat exchange with the demineralized water, the water is discharged to the demineralized water tank 1 through the waste steam drain pipe 7 for circulation.

[0041] Meanwhile, the exhaust gas in the steam drum 4 enters the waste steam recovery device 2 through the steam drum vent pipe 10, serving as a heat source for preheating the ambient temperature demineralized water; the drainage water in the steam drum 4 enters the wastewater expansion container 6 through the steam drum drain pipe 11 for flash evaporation and expansion, and the generated steam enters the deaerator 3 through the expansion container exhaust pipe 12 for deoxygenation, while the generated condensate is discharged to the waste steam recovery device 2 through the expansion container drain pipe 13, serving as a heat source for preheating the ambient temperature demineralized water.

[0042] This invention, by adding a waste steam recovery device 2 and a blowdown expansion tank 6 to the existing riser pipe waste heat recovery system, can recover and utilize the heat energy contained in the exhaust gas and drainage that were originally directly discharged into the air and to the ground in the deaerator 3 and steam drum 4. This heat energy can be used to heat the demineralized water at room temperature, thereby reducing the system's heat loss and improving the system's energy utilization rate. At the same time, since the demineralized water has been preheated by the waste steam recovery device 2, it also reduces the energy consumption when the deaerator 3 heats the demineralized water.

[0043] The above-described preferred embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of this utility model. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A riser pipe heat energy recycling system, characterized in that, The system comprises: a desalted water tank (1) for providing normal-temperature desalted water; a waste steam recovery device (2) disposed in communication with the desalted water tank (1) for preheating the normal-temperature desalted water; a deaerator (3) disposed in communication with the waste steam recovery device (2) for deaerating and heating the preheated desalted water to produce deaerated water, the diffusion exhaust of the deaerator (3) entering the waste steam recovery device (2); a steam drum (4) disposed in communication with the deaerator (3), the diffusion exhaust of the steam drum (4) entering the waste steam recovery device (2); a riser (5) disposed in communication with the steam drum (4), the deaerated water circulating and exchanging heat between the steam drum (4) and the riser (5), the steam-water mixture in the riser (5) after heat exchange returning to the steam drum (4) for steam-water separation; and a blowdown flash tank (6), the drainage of the steam drum (4) entering the blowdown flash tank (6), the exhaust of the blowdown flash tank (6) entering the deaerator (3) and the drainage entering the waste steam recovery device (2).

2. The updraft tube heat energy recycling system of claim 1, wherein, The waste steam recovery device (2) is also in communication with the desalted water tank (1) through a waste steam drainage pipe (7).

3. The updraft tube heat energy recycling system of claim 1, wherein, The deaerator (3) is in communication with the waste steam recovery device (2) through a deaerator diffusion exhaust pipe (8).

4. The updraft tube heat energy recycling system of claim 1, wherein, The deaerator (3) is also in communication with the waste steam recovery device (2) through a deaerator drainage pipe (9).

5. The rising pipe heat energy recycling system according to claim 1, characterized in that, The steam drum (4) is in communication with the waste steam recovery device (2) through a steam drum diffusion exhaust pipe (10).

6. The rising pipe heat energy recycling system according to claim 1, characterized in that, The steam drum (4) is in communication with the blowdown flash tank (6) through a steam drum drainage pipe (11).

7. The rising pipe heat energy recycling system according to claim 1, characterized in that, The blowdown flash tank (6) is in communication with the deaerator (3) through a flash tank exhaust pipe (12).

8. The rising pipe heat energy recycling system according to claim 1, characterized in that, The blowdown flash tank (6) is in communication with the waste steam recovery device (2) through a flash tank drainage pipe (13).

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