Waste heat utilization device for ascension pipe of coke oven

Abstract

The utility model relates to a coke oven ascension pipe waste heat utilization device which comprises a coke oven ascension pipe, the bottom end of the coke oven ascension pipe is connected to the top of a coke oven, and the coke oven ascension pipe serves as a heat exchange pipe and sequentially comprises a crude benzene rich oil heat exchange section, a coke oven heating gas heat exchange section and a coke oven combustion chamber introduced air preheating heat exchange section from bottom to top. The primary section of the crude benzene rich oil heat exchange section is connected with the rich oil tank pipe section, the tail section of the crude benzene rich oil heat exchange section is connected with the debenzolization tower, the coke oven heating gas heat exchange section is connected with the gas storage tank, and the coke oven combustion chamber introduced air preheating heat exchange section is connected with the coke oven waste gas disc. The coke oven ascension pipe waste heat utilization device adopts the principle of proximity, and heat loss in the heat exchange conveying process is avoided. The energy utilization efficiency can be improved and the waste heat utilization value of the ascension pipe of the coke oven can be improved by utilizing an approximately similar fluctuation corresponding relationship between the coke oven heating system and the raw gas output as well as the rest heat.

Description

Technical Field

[0001] The utility model relates to the technical field of coking, and in particular to a coke oven riser waste heat utilization device. Background Art

[0002] The byproduct of coke refining in coke ovens - raw gas, has a temperature of up to 650-800℃ and contains a large amount of sensible heat. In order to reduce the temperature of the raw gas in the coke oven for subsequent coking process treatment, the traditional process uses ammonia spraying to cool the high-temperature raw gas, causing the raw gas to drop sharply to 80-85℃. This process not only wastes a large amount of sensible heat of the raw gas, but also requires a large amount of circulating cooling water and cooling electricity, resulting in energy waste. Based on the above scheme, hot water or low-temperature steam is generated during the waste heat recovery and utilization of the raw gas riser, and there are few application scenarios, which cannot make the waste heat of the raw gas truly and effectively utilized. Utility Model Content

[0003] In response to the technical problems raised above, a coke oven riser waste heat utilization device is provided.

[0004] The technical means adopted by the utility model are as follows:

[0005] A coke oven riser waste heat utilization device comprises a coke oven riser, the bottom end of the coke oven riser is connected to the coke oven top, the coke oven riser as a heat exchange pipe comprises, from bottom to top, a crude benzene oil-rich heat exchange section, a coke oven heating gas heat exchange section and a coke oven combustion chamber introduced air preheating heat exchange section, the initial section of the crude benzene oil-rich heat exchange section is connected to the oil-rich trough pipe section, the final section of the crude benzene oil-rich heat exchange section is connected to a debenzene tower, the coke oven heating gas heat exchange section is connected to a gas storage tank, and the coke oven combustion chamber introduced air preheating heat exchange section is connected to a coke oven waste gas tray.

[0006] Furthermore, the gas storage tanks include blast furnace gas tanks and coke oven gas tanks, and valves are provided on the connecting pipes between the blast furnace gas tanks and the coke oven gas tanks and the coke oven heating gas heat exchange section.

[0007] Furthermore, the coke oven riser includes an inner pipe and an outer pipe, the inner pipe is used for the passage of raw coal gas, and the outer pipe is provided with a partition between the crude benzene oil-rich heat exchange section, the coke oven heating coal gas heat exchange section and the coke oven combustion chamber introduced air preheating heat exchange section to separate the sections, the outer pipe of the crude benzene oil-rich heat exchange section is an oil-rich channel, and the outer pipe outlet of the crude benzene oil-rich heat exchange section is connected to the debenzene tower.

[0008] Furthermore, an oil-rich pump is arranged between the oil-rich tank pipe section and the crude benzene oil-rich heat exchange section, and an oil-rich pump valve is arranged at the outlet of the oil-rich pump. By adjusting the opening of the oil-rich pump valve, the temperature of the crude benzene oil-rich heat exchange section after heat exchange is controlled to reach the debenzene operating temperature of the debenzene tower.

[0009] Furthermore, a temperature sensor is provided in the crude benzene oil-rich heat exchange section, and the temperature sensor is used to measure the oil-rich outlet temperature. The main control system adjusts the opening of the oil-rich pump based on the data transmitted by the temperature sensor.

[0010] Furthermore, an induced draft fan is provided in the air preheating heat exchange section introduced into the coke oven combustion chamber.

[0011] Furthermore, the crude benzene oil-rich heat exchange section occupies more than 1 / 2 of the heat exchange height direction of the coke oven riser; the coke oven heating gas heat exchange section and the coke oven combustion chamber introduced air preheating heat exchange section equally divide the remaining heating height distance of the coke oven riser.

[0012] Compared with the prior art, the utility model has the following advantages: the coke oven riser waste heat utilization device adopts the principle of proximity to avoid heat loss during heat exchange and transportation. By using the coke oven heating system and the amount of raw gas generated and the remaining heat, which have a similar fluctuation correspondence, the energy utilization efficiency can be improved and the utilization value of the coke oven riser waste heat can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] In the figure: 1-debenzene tower; 2-coke oven riser; 3-coke oven exhaust gas tray; 4-induced draft fan; 5-blast furnace gas tank; 6-coke oven gas tank; 7-rich oil tank; 8-rich oil pump. DETAILED DESCRIPTION

[0016] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0018] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0019] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0020] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present utility model: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0021] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0022] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0023] like Figure 1 As shown, the embodiment of the utility model discloses a coke oven riser waste heat utilization device, including a coke oven riser 2, the bottom end of the coke oven riser is connected to the coke oven top, the coke oven riser as a heat exchange pipe includes a crude benzene oil-rich heat exchange section, a coke oven heating gas heat exchange section and a coke oven combustion chamber introduced air preheating heat exchange section from bottom to top, the initial section of the crude benzene oil-rich heat exchange section is connected to the oil-rich tank 7 pipe section, the final section of the crude benzene oil-rich heat exchange section is connected to the debenzene tower 1, the coke oven heating gas heat exchange section is connected to the gas storage tank, and the coke oven combustion chamber introduced air preheating heat exchange section is connected to the coke oven waste gas tray 3. The gas storage tank includes a blast furnace gas tank 5 and a coke oven gas tank 6, and valves are provided on the connecting pipes of the blast furnace gas tank and the coke oven gas tank and the coke oven heating gas heat exchange section. In this embodiment, after the blast furnace gas and the coke oven gas are heated by heat exchange, the gas enters the coke oven gas lower nozzle of the chamber coke oven, and the blast furnace gas enters the blast furnace gas side inlet.

[0024] The coke oven riser includes an inner tube and an outer tube, wherein the inner tube is used for raw gas to pass through, and the outer tube is provided with a partition between the crude benzene oil-rich heat exchange section, the coke oven heating gas heat exchange section and the coke oven combustion chamber air preheating heat exchange section to separate the sections, and the outer tube of the crude benzene oil-rich heat exchange section is an oil-rich channel, and the outer tube outlet of the crude benzene oil-rich heat exchange section is connected to the debenzene tower. After the rich oil passes through the oil-rich heating device, it enters the debenzene tower through the oil-rich pipe, ensuring the debenzene effect.

[0025] An oil-rich pump 8 is arranged between the oil-rich tank pipe section and the crude benzene oil-rich heat exchange section. An oil-rich pump valve is arranged at the outlet of the oil-rich pump. By adjusting the opening of the oil-rich pump valve, the temperature of the crude benzene oil-rich heat exchange section after heat exchange is controlled to reach the debenzene operation temperature of the debenzene tower.

[0026] A temperature sensor is provided in the crude benzene rich oil heat exchange section, and the temperature sensor is used to measure the rich oil outlet temperature. The main control system adjusts the opening of the rich oil pump based on the data transmitted by the temperature sensor. The opening of the rich oil pump is adjusted according to the rich oil outlet temperature measured by the temperature sensor, which has the advantages of stable heating of the rich oil temperature and high degree of automation.

[0027] An induced draft fan 4 is provided in the air preheating heat exchange section introduced into the coke oven combustion chamber.

[0028] The crude benzene oil-rich heat exchange section occupies more than 1 / 2 of the heat exchange height of the coke oven riser; the coke oven heating gas heat exchange section and the coke oven combustion chamber introduced air preheating heat exchange section evenly divide the remaining heating height distance of the coke oven riser.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A coke oven riser waste heat utilization device, characterized in that: It includes a coke oven riser, the bottom end of which is connected to the coke oven top. The coke oven riser as a heat exchange pipe includes, from bottom to top, a crude benzene oil-rich heat exchange section, a coke oven heating gas heat exchange section and a coke oven combustion chamber introduced air preheating heat exchange section. The initial section of the crude benzene oil-rich heat exchange section is connected to the oil-rich trough pipe section, the final section of the crude benzene oil-rich heat exchange section is connected to a debenzene tower, the coke oven heating gas heat exchange section is connected to a gas storage tank, and the coke oven combustion chamber introduced air preheating heat exchange section is connected to a coke oven waste gas tray.

2. The coke oven riser waste heat utilization device according to claim 1, characterized in that: The gas storage tanks include blast furnace gas tanks and coke oven gas tanks. Valves are arranged on the connecting pipelines of the blast furnace gas tanks and coke oven gas tanks and the coke oven heating gas heat exchange section.

3. The coke oven riser waste heat utilization device according to claim 1, characterized in that: The coke oven riser includes an inner tube and an outer tube, the inner tube is used for the passage of raw coal gas, and the outer tube is provided with a partition between the crude benzene oil-rich heat exchange section, the coke oven heating coal gas heat exchange section and the coke oven combustion chamber introduced air preheating heat exchange section to separate the sections, the outer tube of the crude benzene oil-rich heat exchange section is an oil-rich channel, and the outer tube outlet of the crude benzene oil-rich heat exchange section is connected to the debenzene tower.

4. The coke oven riser waste heat utilization device according to claim 1, characterized in that: An oil-rich pump is arranged between the oil-rich tank pipe section and the crude benzene oil-rich heat exchange section. An oil-rich pump valve is arranged at the outlet of the oil-rich pump. By adjusting the opening of the oil-rich pump valve, the temperature of the crude benzene oil-rich heat exchange section after heat exchange is controlled to reach the debenzene operating temperature of the debenzene tower.

5. The coke oven riser waste heat utilization device according to claim 1, characterized in that: A temperature sensor is provided in the crude benzene oil-rich heat exchange section, and the temperature sensor is used to measure the oil-rich outlet temperature. The main control system adjusts the opening of the oil-rich pump based on the data transmitted by the temperature sensor.

6. The coke oven riser waste heat utilization device according to claim 1, characterized in that: The air preheating heat exchange section introduced into the coke oven combustion chamber is provided with an induced draft fan.

7. The coke oven riser waste heat utilization device according to claim 1, characterized in that: The crude benzene oil-rich heat exchange section occupies more than 1 / 2 of the heat exchange height of the coke oven riser; the coke oven heating gas heat exchange section and the coke oven combustion chamber introduced air preheating heat exchange section evenly divide the remaining heating height distance of the coke oven riser.

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