Rich oil heating device

Abstract

The utility model relates to the field of coking devices, in particular to a rich oil heating device. The rich oil heating device comprises a rich oil heater, a steam inlet and a condensate water outlet, wherein the rich oil heater is provided with a rich oil inlet, a rich oil outlet, a steam inlet and a condensate water outlet; the rich oil inlet pipe is communicated with the rich oil inlet; the rich oil outlet pipe is communicated with the rich oil outlet; the steam inlet pipe comprises a methanol saturated steam pipe and a dry quenching superheated steam pipe which are selectively communicated with the steam inlet; the methanol saturated steam pipe is configured to introduce methanol saturated steam into the rich oil heater; the dry quenching superheated steam pipe is configured to enable dry quenching superheated steam to pass into the rich oil heater; and the condensed water pipe is communicated with the condensed water outlet. According to the rich oil heating device, methanol saturated steam can be used for heating rich oil, dry quenching superheated steam can also be used for heating the rich oil, the flexibility is high, and the rich oil can be stably heated.

Description

Technical Field

[0001] The utility model relates to the field of coking devices, in particular to an oil-rich heating device. Background Art

[0002] The tubular furnace heating oil-rich debenzening process is currently the dominant process in the debenzening section of the coking plant. It uses coke oven gas as fuel, and is heated by tubular furnace combustion to produce oil-rich and saturated steam. The heated oil-rich and superheated steam enter the debenzening tower for debenzening. However, with the emergence of high-pressure superheated steam as a by-product of coke dry quenching production equipment or power generation equipment in coking plants, as well as the development of high-value-added products downstream of coal gas, energy conservation and consumption reduction, and tightening of environmental protection policies, the traditional tubular furnace heating oil-rich debenzening process will gradually be replaced by steam heating debenzening process.

[0003] The existing steam heating debenzening process usually includes a coke oven riser, a steam drum, a cylinder, an oil-rich heater, a deoxygenated water supply device and a debenzening device; one end of the coke oven riser is connected to the coke oven, and the other end is connected to the first inlet of the steam drum through a pipeline, the first outlet of the steam drum is connected to the inlet of the cylinder through a pipeline, the outlet of the cylinder is connected to the first inlet of the oil-rich heater through a pipeline, and the first outlet of the oil-rich heater is connected to the debenzening device; the second inlet of the steam drum is connected to the deoxygenated water supply device. However, in actual use, the entire process heavily relies on the coke oven riser waste heat recovery device. During operation, it is affected by the coke oven production load and the number of risers opened, the steam production and quality fluctuate greatly, and the oil-rich heating effect is unstable.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0005] In order to improve or solve the technical problems in the prior art that the steam flow is affected by the coke oven riser waste heat recovery device, fluctuates greatly, and the rich oil heating is unstable, the utility model provides an oil-rich heating device. The rich oil heating device includes: an oil-rich heater, having an oil-rich inlet, an oil-rich outlet, a steam inlet and a condensed water outlet; an oil-rich inlet pipe, arranged at the rich oil inlet and connected to the rich oil inlet; an oil-rich outlet pipe, arranged at the rich oil outlet and connected to the rich oil outlet; a steam inlet pipe, arranged at the steam inlet, and including a methanol saturated steam pipe and a dry coke quenching superheated steam pipe that are selectively connected to the steam inlet; the methanol saturated steam pipe is configured to pass methanol saturated steam into the rich oil heater; the dry coke quenching superheated steam pipe is configured to pass dry coke quenching superheated steam into the rich oil heater; a condensed water pipe, arranged at the condensed water outlet and connected to the condensed water outlet.

[0006] In the oil-rich heating device of the utility model, it includes an oil-rich heater, an oil-rich inlet pipe, an oil-rich outlet pipe, a steam inlet pipe and a condensed water pipe. Among them, the oil-rich heater is used to heat the rich oil and store part of the condensed water, and the steam and the condensed water can exchange heat with the rich oil at the same time. The steam inlet pipe includes a methanol saturated steam pipe and a dry coke quenching superheated steam pipe, so that the oil-rich heater can use methanol saturated steam to heat the rich oil, and can also use dry coke quenching superheated steam to heat the rich oil. When one of them fluctuates, the other can be used for heating. It has high flexibility and good heating effect on the rich oil. Through the above-mentioned settings, the oil-rich heating device of the utility model can use methanol saturated steam to heat the rich oil, and can also use dry coke quenching superheated steam to heat the rich oil. It has high flexibility and can heat the rich oil more stably.

[0007] In the preferred technical solution of the above-mentioned oil-rich heating device, the steam inlet pipe also includes a collecting pipe, and the collecting pipe is connected to the methanol saturated steam pipe and the CDQ superheated steam pipe.

[0008] In the preferred technical solution of the above-mentioned oil-rich heating device, a check valve is arranged on the methanol saturated steam pipe. Through the above-mentioned arrangement, the arrangement of the check valve can prevent the high-temperature and high-pressure CDQ superheated steam from entering the methanol saturated steam pipe, thereby preventing the methanol saturated steam pipe from rupturing and being damaged.

[0009] In the preferred technical solution of the above-mentioned rich oil heating device, a remote thermometer for detecting the rich oil temperature is arranged on the rich oil outlet pipe. Through the above-mentioned arrangement, the arrangement of the remote thermometer can more conveniently obtain the temperature of the rich oil after heat exchange.

[0010] In the preferred technical solution of the above-mentioned oil-rich heating device, a first regulating valve group linked with the remote thermometer is arranged on the methanol saturated steam pipe, and the first regulating valve group is configured to adjust the opening according to the indication of the remote thermometer. Through the above-mentioned setting, the first regulating valve group is linked with the remote thermometer, and the delivery amount of methanol saturated steam can be adjusted according to the rich oil temperature at the rich oil outlet, so as to dynamically adjust the rich oil temperature; when the indication of the remote thermometer is lower than the preset value, the opening is increased to allow more methanol saturated steam to flow into the rich oil heater, thereby increasing the temperature of the rich oil; when the indication of the remote thermometer is higher than the preset value, the opening is reduced to reduce the inflow of methanol saturated steam, thereby reducing the temperature of the rich oil.

[0011] In the preferred technical solution of the above-mentioned oil-rich heating device, a second regulating valve group linked to the remote thermometer is arranged on the dry coke quenching superheated steam pipe; the second regulating valve group is configured to adjust the opening according to the indication of the remote thermometer. Through the above-mentioned setting, the second regulating valve group is linked with the remote thermometer, and the delivery amount of the dry coke quenching superheated steam can be adjusted according to the rich oil temperature at the rich oil outlet, so as to dynamically adjust the rich oil temperature; when the indication of the remote thermometer is lower than the preset value, the opening is increased to allow more dry coke quenching superheated steam to flow into the rich oil heater, thereby increasing the temperature of the rich oil; when the indication of the remote thermometer is higher than the preset value, the opening is reduced to reduce the inflow of the dry coke quenching superheated steam, thereby reducing the temperature of the rich oil.

[0012] In the preferred technical solution of the above-mentioned oil-rich heating device, the CDQ superheated steam pipe is connected to a branch pipe suitable for connecting to the debenzene tower and the regenerator, and a pressure reducing valve, a remote pressure gauge and a third regulating valve group are arranged in sequence on the branch pipe, the pressure reducing valve is configured to adjust the steam pressure of the CDQ superheated steam in the branch pipe; the remote pressure gauge is configured to detect the adjusted steam pressure of the CDQ superheated steam; the third regulating valve group is configured to adjust the flow rate of the CDQ superheated steam in the branch pipe.

[0013] In the preferred technical solution of the above-mentioned rich oil heating device, a liquid level meter for detecting the water level of condensed water in the rich oil heater is arranged in the rich oil heater. Through the above-mentioned arrangement, the arrangement of the liquid level meter facilitates the detection of the water level of condensed water in the rich oil heater.

[0014] In the preferred technical solution of the above-mentioned rich oil heating device, a fourth regulating valve group linked with the liquid level meter is arranged on the condensed water pipe, and the fourth regulating valve group is configured to adjust the opening according to the indication of the liquid level meter. Through the above-mentioned setting, the fourth regulating valve group is linked with the liquid level meter, and the discharge amount of condensed water can be adjusted according to the indication of the liquid level meter, thereby avoiding the adverse effect of excessive or insufficient condensed water on the heating effect of rich oil.

[0015] In the preferred technical solution of the above-mentioned rich oil heating device, a methanol deaerator is arranged at one end of the condensed water pipe away from the rich oil heater. Through the above-mentioned arrangement, the arrangement of the methanol deaerator can deoxygenate the discharged condensed water so as to recycle the condensed water; at the same time, the condensed water has a certain temperature, which can avoid reheating the water with a lower temperature, thereby saving heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0017] Figure 1 It is a schematic diagram of an embodiment of the oil-rich heating device of the utility model.

[0018] List of reference numerals: 1. oil-rich heater; 11. remote level gauge; 12. local level gauge; 2. oil-rich inlet pipe; 3. oil-rich outlet pipe; 31. remote thermometer; 4. steam inlet pipe; 41. methanol saturated steam pipe; 411. first regulating valve group; 42. CDQ superheated steam pipe; 421. second regulating valve group; 422. branch pipe; 423. pressure reducing valve; 424. safety valve; 425. remote pressure gauge; 426. third regulating valve group; 43. collecting pipe; 44. check valve; 5. condensate pipe; 51. fourth regulating valve group; 52. methanol deaerator; 53. throttling orifice. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0020] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In order to improve or solve the technical problems in the prior art that the steam flow is affected by the coke oven riser waste heat recovery device, fluctuates greatly, and the rich oil heating is poor, the utility model provides an oil-rich heating device. The oil-rich heating device comprises: an oil-rich heater 1, having an oil-rich inlet, an oil-rich outlet, a steam inlet and a condensed water outlet; an oil-rich inlet pipe 2, arranged at the oil-rich inlet and connected to the oil-rich inlet; an oil-rich outlet pipe 3, arranged at the oil-rich outlet and connected to the oil-rich outlet; a steam inlet pipe 4, arranged at the steam inlet, and comprising a methanol saturated steam pipe 41 and a dry coke quenching superheated steam pipe 42, which are optionally connected to the steam inlet; the methanol saturated steam pipe 41 is configured to pass methanol saturated steam into the oil-rich heater 1; the dry coke quenching superheated steam pipe 42 is configured to pass dry coke quenching superheated steam into the oil-rich heater 1; and a condensed water pipe 5, arranged at the condensed water outlet and connected to the condensed water outlet.

[0023] Figure 1 Schematic diagram of an embodiment of the oil-rich heating device of the utility model. Figure 1 As shown, in one or more embodiments, the oil-rich heating device of the utility model includes an oil-rich heater 1, an oil-rich inlet pipe 2, an oil-rich outlet pipe 3, a steam inlet pipe 4 and a condensed water pipe 5.

[0024] Continue to see Figure 1 The rich oil heater 1 has a rich oil inlet, a rich oil outlet, a steam inlet, and a condensate outlet. Among them, the rich oil inlet and the condensate outlet are located below the rich oil heater 1, and the rich oil outlet and the steam inlet are located above the rich oil heater 1. The rich oil enters the rich oil heater 1 from the rich oil inlet, and the steam enters the rich oil heater 1 from the steam inlet. After the rich oil heater 1 exchanges heat with the condensate and steam, it flows out of the rich oil heater 1 from the rich oil outlet. Exemplarily, the rich oil is 130℃-150℃ before entering the rich oil heater 1, and the rich oil is 175℃-190℃ when it flows out of the rich oil heater 1. In one or more embodiments, the rich oil heater 1 has an upper and lower part, wherein the upper part is a steam heat exchanger and the lower part is a condensate storage tank, and both the upper part and the lower part can heat the rich oil. Furthermore, a liquid level gauge for detecting the condensate water level in the rich oil heater 1, that is, a liquid level gauge for detecting the condensate water level in the condensate tank, is arranged in the rich oil heater 1. Preferably, the liquid level meter includes a remote liquid level meter 11 and an on-site liquid level meter 12. The remote liquid level meter 11 can transmit the detection indication to other components. The on-site liquid level meter 12 is convenient for the staff to actually observe the detection indication. Preferably, the remote liquid level meter 11 is a dual-view balance container liquid level meter, which is suitable for environments with high pressure and has high stability and accuracy. The on-site liquid level meter 12 is a glass plate two-color water level meter with distinct colors, which is convenient for the staff to observe the liquid level and has high accuracy.

[0025] Continue to see Figure 1The rich oil inlet pipe 2 is arranged at the rich oil inlet and communicated with the rich oil inlet. The rich oil outlet pipe 3 is arranged at the rich oil outlet and communicated with the rich oil outlet. In one or more embodiments, a remote thermometer 31 for detecting the rich oil temperature is arranged on the rich oil outlet pipe 3. The remote thermometer 31 can transmit the detection reading to other components.

[0026] Continue to see Figure 1 In one or more embodiments, the steam inlet pipe 4 is arranged at the steam inlet, and includes a methanol saturated steam pipe 41 and a dry coke quenching superheated steam pipe 42. The methanol saturated steam pipe 41 can pass methanol saturated steam into the oil-rich heater 1, and the dry coke quenching superheated steam pipe 42 can pass dry coke quenching superheated steam into the oil-rich heater 1. The methanol saturated steam pipe 41 and the dry coke quenching superheated steam pipe 42 are selectively opened, and the two do not provide steam to the oil-rich heater 1 at the same time. Further, the methanol saturated steam pipe 41 and the dry coke quenching superheated steam pipe 42 are gathered near the oil-rich heater 1 to form a collection pipe 43, and the collection pipe 43 is connected to the oil-rich heater 1. Further, a check valve 44 is arranged on the methanol saturated steam pipe 41, and the check valve 44 can prevent the dry coke quenching superheated steam in the dry coke quenching superheated steam pipe 42 from flowing into the methanol saturated steam pipe 41. Furthermore, a first regulating valve group 411 is provided on the methanol saturated steam pipe 41, and the first regulating valve group 411 is linked with the remote thermometer 31, and the opening can be adjusted according to the indication of the remote thermometer 31. Specifically, when the indication of the remote thermometer 31 is lower than the preset value, the opening is increased to allow more methanol saturated steam to flow into the rich oil heater 1, thereby increasing the temperature of the rich oil; when the indication of the remote thermometer 31 is higher than the preset value, the opening is reduced to reduce the inflow of methanol saturated steam, thereby reducing the temperature of the rich oil. Preferably, the first regulating valve group 411 is a pneumatic regulating valve or an explosion-proof high-speed electric regulating valve. Further, a spare pipeline is arranged at the first regulating valve group 411, and the spare pipeline can maintain the opening and closing of the methanol saturated steam pipe 41 when the first regulating valve group 411 is damaged or overhauled.

[0027] Continue to see Figure 1In one or more embodiments, a second regulating valve group 421 is arranged on the CDQ superheated steam pipe 42, and the second regulating valve group 421 is linked with the remote thermometer 31, and the opening can be adjusted according to the indication of the remote thermometer 31. Specifically, when the indication of the remote thermometer 31 is lower than the preset value, the opening is increased to allow more CDQ superheated steam to flow into the oil-rich heater 1, thereby increasing the temperature of the oil-rich; when the indication of the remote thermometer 31 is higher than the preset value, the opening is reduced to reduce the inflow of CDQ superheated steam, thereby reducing the temperature of the oil-rich. Preferably, the second regulating valve group 421 is a pneumatic regulating valve or an explosion-proof high-speed electric regulating valve. Further, a spare pipeline is arranged at the second regulating valve group 421, and the spare pipeline can maintain the opening and closing of the CDQ superheated steam pipe 42 when the second regulating valve group 421 is damaged or overhauled. Further, the CDQ superheated steam pipe 42 is connected with a branch pipe 422, and the branch pipe 422 is suitable for connecting with the debenzene tower and the regenerator. From the CDQ superheated steam pipe 42 to the debenzene tower and the regenerator, a pressure reducing valve 423, a safety valve 424, a remote pressure gauge 425 and a third regulating valve group 426 are arranged in sequence on the branch pipe 422. Among them, the pressure reducing valve 423 can adjust the steam pressure of the CDQ superheated steam in the branch pipe 422. Exemplarily, the steam pressure is reduced from 3.0-3.5MPa to less than 1.5MPa. Further, the pressure reducing valve 423 is set to operate in parallel with two units, one open and one standby, to prevent the normal operation of the branch pipe 422 from being affected by the failure of the pressure reducing valve 423. The remote pressure gauge 425 is arranged between the pressure reducing valve 423 and the third regulating valve group 426, and is used to detect the steam pressure of the CDQ superheated steam after being adjusted by the pressure reducing valve 423. The third regulating valve group 426 is used to adjust the flow rate of the CDQ superheated steam in the branch pipe 422. Preferably, the third regulating valve group 426 is a pneumatic regulating valve or an explosion-proof high-speed electric regulating valve.

[0028] Continue to see Figure 1In one or more embodiments, one end of the condensate pipe 5 is connected to the hot oil heater, and the other end is provided with a methanol deaerator 52. The methanol deaerator 52 is used to deoxygenate the condensate to prevent the oxygen in the condensate from corroding the pipeline, thereby facilitating the recycling of the condensate. Further, a throttling orifice 53 is provided on the condensate pipe 5 near the methanol deaerator 52. The throttling orifice 53 can prevent the condensate pressure from dropping and causing flash evaporation, thereby affecting the normal operation of the condensate pipe 5. Further, a fourth regulating valve group 51 is arranged on the condensate pipe 5, and the fourth regulating valve group 51 is linked with the liquid level gauge, and the opening can be adjusted according to the indication of the liquid level gauge. Specifically, the fourth regulating valve group 51 is linked with the local liquid level gauge 12; when the indication of the local liquid level gauge 12 is lower than the preset value, the opening is reduced to increase the liquid level of the condensate in the rich oil heater 1; when the indication of the local liquid level gauge 12 is higher than the preset value, the opening is increased to reduce the liquid level of the condensate in the rich oil heater 1. Preferably, the fourth regulating valve group 51 is a pneumatic regulating valve or an explosion-proof high-speed electric regulating valve.

[0029] The utility model of the oil-rich heating device can use the medium-pressure saturated steam produced by methanol to heat the rich oil, and can also use the superheated steam of dry coke quenching for heating. The investment is only 1 / 7 of the waste heat utilization of the coke oven riser. The investment is moderate and can meet the operation requirements of steam replacing tubular furnace heating. At the same time, the use of methanol saturated steam for heating saves gas compared to tubular furnace heating. For coking plants equipped with gas turbines and steam turbine power generation devices, it can greatly improve the utilization rate of gas and increase the added value of gas, with considerable economic benefits. Taking the tubular furnace supporting the 1.5 million tons / year coking project as an example, the oil washing circulation volume is 140m 3 / h, consumes about 8-9t / h of methanol saturated steam, but can save 1400-1500m3 of gas consumption 3 / h, the replaced coal gas can generate 970kw-1100kw more electricity per hour, greatly increasing the added value of coal gas, saving more than 9 million yuan in electricity bills per year, and having good economic benefits.

[0030] So far, the technical scheme of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical schemes after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An oil-rich heating device, characterized in that: include: An oil-rich heater (1) having an oil-rich inlet, an oil-rich outlet, a steam inlet and a condensate outlet; An oil-rich inlet pipe (2) is arranged at the oil-rich inlet and communicated with the oil-rich inlet; An oil-rich outlet pipe (3), arranged at the oil-rich outlet and connected to the oil-rich outlet; a steam inlet pipe (4), arranged at the steam inlet, and comprising a methanol saturated steam pipe (41) and a dry coke quenching superheated steam pipe (42) which are selectively connected to the steam inlet; the methanol saturated steam pipe (41) is configured to pass methanol saturated steam into the oil-rich heater (1); the dry coke quenching superheated steam pipe (42) is configured to pass dry coke quenching superheated steam into the oil-rich heater (1); A condensate water pipe (5) is arranged at the condensate water outlet and communicated with the condensate water outlet.

2. The oil-rich heating device according to claim 1, characterized in that: The steam inlet pipe (4) further comprises a collecting pipe (43), wherein the collecting pipe (43) is in communication with the methanol saturated steam pipe (41) and the CDQ superheated steam pipe (42).

3. The oil-rich heating device according to claim 2, characterized in that: A check valve (44) is arranged on the methanol saturated steam pipe (41).

4. The oil-rich heating device according to claim 1, characterized in that: A remote temperature transmitter (31) for detecting the rich oil temperature is arranged on the rich oil outlet pipe (3).

5. The oil-rich heating device according to claim 4, characterized in that: A first regulating valve group (411) linked to the remote thermometer (31) is arranged on the methanol saturated steam pipe (41), and the first regulating valve group (411) is configured to adjust the opening according to the indication of the remote thermometer (31).

6. The oil-rich heating device according to claim 4, characterized in that: A second regulating valve group (421) linked to the remote thermometer (31) is arranged on the dry quenching superheated steam pipe (42); the second regulating valve group (421) is configured to adjust the opening according to the indication of the remote thermometer (31).

7. The oil-rich heating device according to claim 1, characterized in that: The dry coke quenching superheated steam pipe (42) is connected to a branch pipe (422) suitable for being connected to a debenzene tower and a regenerator. A pressure reducing valve (423), a remote pressure gauge (425) and a third regulating valve group (426) are arranged in sequence on the branch pipe (422). The pressure reducing valve (423) is configured to adjust the steam pressure of the dry coke quenching superheated steam in the branch pipe (422); the remote pressure gauge (425) is configured to detect the adjusted steam pressure of the dry coke quenching superheated steam; and the third regulating valve group (426) is configured to adjust the flow rate of the dry coke quenching superheated steam in the branch pipe (422).

8. The oil-rich heating device according to claim 1, characterized in that: A liquid level meter for detecting the water level of condensed water in the rich oil heater (1) is arranged in the rich oil heater (1).

9. The oil-rich heating device according to claim 8, characterized in that: A fourth regulating valve group (51) linked to the liquid level meter is arranged on the condensate water pipe (5), and the fourth regulating valve group (51) is configured to adjust the opening according to the indication of the liquid level meter.

10. The oil-rich heating device according to claim 1, characterized in that: A methanol deoxygenator (52) is provided at one end of the condensate pipe (5) away from the rich oil heater (1).

Images