Heating furnace steam temperature control structure of naphthenic oil hydrogenation system
By setting a temperature reducer and a temperature reduction water pipe at the steam inlet of the heating furnace of the cycloalkyl oil hydrogenation system, the steam temperature is adjusted by mixing low-pressure steam and reduced water, which solves the problem of excessive steam temperature of the heating furnace being too high, and improves the stability and economicality of the system.
Patent Information
- Application Number
- CN202421775038.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-25
AI Technical Summary
The superheating steam temperature of the heating furnace of the existing cycloalkyl oil hydrogenation system is high, which poses safety hazards and affects the stability and economy of the system.
A steam temperature control structure of heating furnace is designed. By connecting a temperature reducer and a temperature reduction water pipe at the steam inlet, the steam temperature is adjusted by mixing low-pressure steam and reduced water, including low-pressure steam input pipe, superheated steam output pipe, temperature reducer, temperature reduction water pipe and multiple valves to achieve fine temperature control.
It effectively avoids equipment damage and safety accidents caused by excessive overheating steam temperature after the furnace, improves the stability and economy of the system, and promotes reaction rate and product yield.
Smart Images
Figure CN222911614U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of naphthenic base oil hydrogenation equipment, and in particular relates to a steam temperature control structure of a heating furnace in a naphthenic base oil hydrogenation system. Background Art
[0002] In the field of petrochemicals, the cycloalkane oil hydrogenation system is a set of production facilities specifically used to process cycloalkane oil. Cycloalkane oil is a petroleum product containing cycloalkanes, which has a wide range of industrial applications, such as as a base oil for lubricants and a solvent in certain chemical reactions.
[0003] The naphthenic oil hydrogenation system is to remove impurities such as sulfur and nitrogen in oil products through hydrogenation reaction to improve the quality of oil products. In order to improve the purity of oil products, in the naphthenic oil hydrogenation system, light hydrocarbons are removed from the hydrogenated oil products through steam stripping process.
[0004] At present, the cycloalkane oil hydrogenation system used by Shenmu Fuyou Energy Technology Co., Ltd. has been shut down for some stripping towers due to product structure adjustments, resulting in a reduction in the use of superheated steam in the heating furnace. During operation, the temperature of the superheated steam behind the furnace is relatively high, posing a safety hazard. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a heating furnace steam temperature control structure of a cycloalkane oil hydrogenation system which has a reasonable design and improves system stability and economy.
[0006] The technical solution adopted to solve the above technical problems is: a steam temperature control structure of a heating furnace of a cycloalkyl oil hydrogenation system, wherein the steam inlet of the heating furnace is connected to a low-pressure steam input pipe, the superheated steam outlet is connected to a superheated steam output pipe, the low-pressure steam input pipe is connected to a desuperheater at the steam inlet of the heating furnace, the desuperheater is connected to a desuperheating water pipe, and the desuperheating water pipe is connected in series with a first low-temperature water gate valve, a regulating valve, and a second low-temperature water gate valve.
[0007] As a preferred technical solution, a third low-temperature water gate valve is connected in parallel to the water inlet of the first low-temperature water gate valve, and the water outlet of the third low-temperature water gate valve is connected to the water outlet of the second low-temperature water gate valve through a pipeline.
[0008] As a preferred technical solution, a low-pressure steam gate valve is connected to the water inlet side of the desuperheater on the low-pressure steam input pipe.
[0009] As a preferred technical solution, a thermometer is provided on the superheated steam output pipe, and at least two superheated steam delivery structures are provided in parallel on the superheated steam output pipe downstream of the thermometer.
[0010] As a preferred technical solution, the superheated steam delivery structure is a superheated steam branch pipe with a branch pipe gate valve connected in series, and a vent gate valve is arranged downstream of the branch pipe gate valve.
[0011] As a preferred technical solution, a venting structure is connected between the thermometer on the superheated steam output pipe and the superheated steam delivery structure.
[0012] As a preferred technical solution, the venting structure is a venting pipe with a first superheated steam gate valve and a second superheated steam gate valve connected in series, a venting gate valve is connected between the first superheated steam gate valve and the second superheated steam gate valve, and a muffler is arranged at the far end of the venting pipe.
[0013] The beneficial effects of the utility model are as follows:
[0014] The utility model connects a desuperheater at the steam inlet of the heating furnace, and a desuperheater is connected to the desuperheater. Desuperheating water is introduced into the desuperheater through the desuperheater water pipe to mix with low-pressure steam to adjust the temperature of the steam, thereby avoiding the risk of equipment damage and safety accidents caused by excessively high temperature of superheated steam after the furnace, and more accurate temperature control is helpful to improve the reaction rate and product yield. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model.
[0016] Among them: low-pressure steam gate valve 1, low-pressure steam input pipe 2, desuperheater 3, heating furnace 4, superheated steam output pipe 5, thermometer 6, first superheated steam gate valve 7, second vent gate valve 8, second superheated steam gate valve 9, vent pipe 10, muffler 11, first vent gate valve 12, branch gate valve 13, superheated steam branch pipe 14, second low-temperature water gate valve 15, third low-temperature water gate valve 16, regulating valve 17, first low-temperature water gate valve 18, desuperheating water pipe 19. DETAILED DESCRIPTION
[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the following embodiments.
[0018] exist Figure 1In the embodiment, a steam temperature control structure of a heating furnace of a cycloalkane oil hydrogenation system is provided. A low-pressure steam input pipe 2 is connected to the steam inlet of the heating furnace 4, and a superheated steam output pipe 5 is connected to the superheated steam outlet. A desuperheater 3 is connected to the low-pressure steam input pipe 2 at the steam inlet of the heating furnace 4. A desuperheater water pipe 19 is connected to the desuperheater 3. A first low-temperature water gate valve 18, a regulating valve 17, and a second low-temperature water gate valve 15 are connected in series to the desuperheater water pipe 19. A third low-temperature water gate valve 16 is connected in parallel to the water inlet of the first low-temperature water gate valve 18, and the water outlet of the third low-temperature water gate valve 16 is connected to the water outlet of the second low-temperature water gate valve 15 through a pipeline. A low-pressure steam gate valve 1 is connected to the water inlet side of the desuperheater 3 on the low-pressure steam input pipe 2. A thermometer 6 is provided on the superheated steam output pipe 5, and at least two superheated steam delivery structures are provided in parallel on the superheated steam output pipe 5 downstream of the thermometer 6. The superheated steam delivery structure is a superheated steam branch pipe 14 with a branch pipe gate valve 13 connected in series, and a first vent gate valve 12 is provided downstream of the branch pipe gate valve 13.
[0019] A venting structure is connected between the thermometer 6 on the superheated steam output pipe 5 and the superheated steam delivery structure, which is used to discharge the stripping steam that needs to be discharged from the tower when an emergency occurs in the system. The venting structure is a venting pipe 10 connected in series with a first superheated steam gate valve 7 and a second superheated steam gate valve 9, a second venting gate valve 8 is connected between the first superheated steam gate valve 7 and the second superheated steam gate valve 9, and a muffler 11 is provided at the far end of the venting pipe 10 to reduce the noise generated during venting and protect the operator and the surrounding environment.
[0020] The input end of the cooling water pipe 19 of this embodiment is connected to the deoxygenated water pipe of the cycloalkane oil hydrogenation system, that is, the cooling water comes from the deoxygenated water.
[0021] The working principle of the utility model is as follows:
[0022] The low-pressure steam enters the heating furnace 4 through the low-pressure steam input pipe 2 and is ready to be heated. Before entering the heating furnace 4, the low-pressure steam passes through the desuperheater 3. Desuperheating water is introduced into the desuperheater 3 through the desuperheating water pipe 19, and the temperature of the steam is adjusted after mixing. The first and second low-temperature water gate valves 15 and the third low-temperature water gate valve 16 are used to control the flow of desuperheating water entering the desuperheater 3, so as to finely adjust the temperature of the mixed steam. The low-pressure steam after the festival is heated to the required superheated steam state in the heating furnace 4. The thermometer 6 on the superheated steam output pipe 5 is used to monitor the temperature of the superheated steam in real time to ensure that it is within the range of safety and efficiency requirements. The superheated steam is distributed through at least two superheated steam delivery structures to supply different process requirements.
Claims
1. A steam temperature control structure for a heating furnace of a naphthenic oil hydrogenation system, wherein a low-pressure steam input pipe is connected to the steam inlet of the heating furnace, and a superheated steam output pipe is connected to the superheated steam outlet, characterized in that: A desuperheater is connected to the low-pressure steam input pipe at the steam inlet of the heating furnace, a desuperheater is connected to a desuperheating water pipe, and a first low-temperature water gate valve, a regulating valve and a second low-temperature water gate valve are connected in series to the desuperheating water pipe.
2. The steam temperature control structure of the heating furnace of the naphthenic oil hydrogenation system according to claim 1 is characterized by: A third low-temperature water gate valve is connected in parallel to the water inlet of the first low-temperature water gate valve, and a water outlet of the third low-temperature water gate valve is connected to the water outlet of the second low-temperature water gate valve through a pipeline.
3. The steam temperature control structure of the heating furnace of the naphthenic oil hydrogenation system according to claim 1 is characterized by: A low-pressure steam gate valve is connected to the water inlet side of the desuperheater on the low-pressure steam input pipe.
4. The steam temperature control structure of the heating furnace of the naphthenic oil hydrogenation system according to claim 1 is characterized by: The superheated steam output pipe is provided with a thermometer, and at least two superheated steam delivery structures are provided in parallel on the superheated steam output pipe downstream of the thermometer.
5. The steam temperature control structure of the heating furnace of the naphthenic oil hydrogenation system according to claim 4 is characterized by: The superheated steam delivery structure is a superheated steam branch pipe with a branch pipe gate valve connected in series, and a venting gate valve is arranged downstream of the branch pipe gate valve.
6. The steam temperature control structure of the heating furnace of the naphthenic oil hydrogenation system according to claim 4 is characterized by: A venting structure is connected between the thermometer on the superheated steam output pipe and the superheated steam delivery structure.
7. The steam temperature control structure of the heating furnace of the naphthenic oil hydrogenation system according to claim 6 is characterized by: The venting structure is that a first superheated steam gate valve and a second superheated steam gate valve are connected in series on a venting pipe, a venting gate valve is connected between the first superheated steam gate valve and the second superheated steam gate valve, and a muffler is arranged at the far end of the venting pipe.