CN213467730U

CN213467730U - Feeding preheating system

Info

Publication number: CN213467730U
Application number: CN202021577654.8U
Authority: CN
Inventors: 刘哲; 吕云飞; 邓宏达; 王鑫; 昝大鑫
Original assignee: Zhangjiagang Free Trade Zone Huixin Chemical Technology Co ltd
Current assignee: Zhangjiagang Free Trade Zone Huixin Chemical Technology Co ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-06-18
Anticipated expiration: 2030-08-03

Abstract

The application discloses feeding system of preheating relates to suspension bed hydrocracking field. The feed system described herein comprises: a heater; the condensate tank is connected with the heater through an air outlet pipe; the feeding premixing tank is connected with the heater through the discharging pipe; the temperature detection module is arranged on the feeding premixing tank; and the liquid level control module is arranged on the condensate tank and is communicated with the temperature detection module. This application embodiment is through setting up temperature detection module and liquid level control module, and liquid level control module is through the control to the liquid level in the condensate tank, controls the steam flow of input heater to the realization is to the control of feed temperature.

Description

Feeding preheating system

Technical Field

The application relates to the technical field of suspension bed hydrogenation, in particular to a feeding preheating system.

Background

The suspension bed hydrocracking technology is a thermal hydrocracking process, and can convert petroleum residue and coarse coal into marketable liquid fraction. In a suspension bed hydrogenation reaction system, when the raw materials are subjected to pre-hydrogenation, the raw materials need to be preheated to an ideal reaction temperature, so a feeding preheating system needs to be arranged in a mixing device.

For example, chinese utility model patent with publication number CN206173270U discloses "a pre-hydrogenation reaction heat exchange system for oil", which includes: the device comprises a pre-hydrogenation reactor and a feed heat exchanger, wherein one end of a tube pass of the feed heat exchanger is provided with a raw material inlet, the other end of the tube pass of the feed heat exchanger is provided with a raw material outlet, and the pre-hydrogenation reactor is communicated with the raw material outlet of the feed heat exchanger; one end of the shell side of the feeding heat exchanger is provided with a steam inlet, and the other end of the shell side of the feeding heat exchanger is provided with a steam outlet; the inlet of the temperature and pressure reducer is connected with a 3.5MPa steam pipeline of a steam pipe network, and the outlet of the temperature and pressure reducer is communicated with the steam inlet of the feeding heat exchanger; and one end of the condensed water tank is communicated with a steam outlet of the shell pass of the feeding heat exchanger through a drain valve, and the other end of the condensed water tank is provided with a water outlet.

In above-mentioned technical scheme, make raw materials and steam carry out the heat transfer through the feeding heat exchanger, reach the purpose that the raw materials preheated, but in actual operation, can't control the temperature of feeding, if the feeding temperature is unstable, can cause very big fluctuation to the feeding buffer tank that preheats the system low reaches, lead to production interrupt even when serious.

SUMMERY OF THE UTILITY MODEL

The utility model provides a feeding system of preheating solves the problem that can't control feeding temperature among the prior art, guarantees that the raw materials gets into the feeding buffer tank with the temperature of a temperature.

In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions: a feed preheating system comprising: a heater having: a feed pipe for feeding the raw material to the heater; a discharge pipe disposed opposite to the feed pipe, the discharge pipe for outputting the raw material from the heater; an inlet pipe for inputting steam to the heater; the air outlet pipe is arranged opposite to the air inlet pipe, and the air inlet pipe is used for outputting steam from the heater; the condensate tank is connected with the heater through an air outlet pipe; the feeding premixing tank is connected with the heater through the discharging pipe; the temperature detection module is arranged on the feeding premixing tank; and the liquid level control module is arranged on the condensate tank and is communicated with the temperature detection module.

In above-mentioned technical scheme, this application embodiment is through setting up temperature detection module and liquid level control module, and temperature detection module is arranged in detecting the raw materials temperature in the feeding premixing jar, and liquid level control module is arranged in controlling the liquid level in the condensate tank. The temperature detection module is communicated with the liquid level control module, the temperature detection module transmits a temperature signal to the liquid level control module, and the liquid level control module controls the steam flow of the input heater through controlling the liquid level in the condensate tank, so that the control of the feeding temperature is realized. This application can be accurate control feeding temperature, makes production operation steady smooth-going, has effectively solved the control problem of the feeding temperature among the prior art, for the long period operation of system provides the assurance, more can adapt to the market demand.

Further, according to the embodiment of the application, the heater is a shell-and-tube heat exchanger.

Further, according to the embodiment of the application, a drain pipe is arranged at the lower part of the condensate tank.

Further, according to the embodiment of the present application, wherein, the liquid level control module includes: the second liquid level meter is arranged at the end part of the condensate tank; the first control valve is arranged on the liquid discharge pipe, and the second liquid level meter is communicated with the control valve.

Further, according to this application embodiment, wherein, the temperature detection module includes temperature sensor, and temperature sensor sets up the discharge gate department below the feeding premixing jar.

Further, according to the embodiment of the application, a gas phase balance pipeline is arranged above the condensate tank.

Further, according to this application embodiment, wherein, feeding mixes jar below in advance and is provided with level gauge one, is provided with control valve two on the discharging pipe, and level gauge one communicates with control valve two.

In order to achieve the purpose, the embodiment of the application also discloses.

Compared with the prior art, the method has the following beneficial effects: this application is through setting up temperature detection module and liquid level control module, and temperature detection module is arranged in detecting the feeding and mixes the raw materials temperature in the jar in advance, and liquid level control module is arranged in controlling the liquid level in the condensate tank. The temperature detection module is communicated with the liquid level control module, the temperature detection module transmits a temperature signal to the liquid level control module, and the liquid level control module controls the steam flow of the input heater through controlling the liquid level in the condensate tank, so that the control of the feeding temperature is realized. This application can be accurate control feeding temperature, makes production operation steady smooth-going, has effectively solved the control problem of the feeding temperature among the prior art, for the long period operation of system provides the assurance, more can adapt to the market demand.

Drawings

The present application is further described below with reference to the drawings and examples.

FIG. 1 is a schematic diagram of a feed preheating system of the present application.

In the attached drawings

1. Heater 2, lime set jar 3, feeding premix jar

4. Feed pipe 5, intake pipe 6, discharging pipe

7. An air outlet pipe 8, a liquid discharge pipe 9 and a liquid level meter I

10. Temperature sensor 11, liquid level meter II 12 and control valve I

13. Control valve II 14 and gas phase balance pipe

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clear and fully described, embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art that the embodiments may be practiced without these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.

The present application illustrates a feed preheating system through fig. 1, which is mainly used for a suspension hydrocracking system, but is also applicable to other reaction systems requiring preheating of raw materials. As shown in fig. 1, the feeding preheating system includes a heater 1, a condensate tank 2 and a feeding premixing tank 3, the condensate tank 2 is a horizontal tank, and the feeding premixing tank 3 is a vertical tank. In the present application, the heater 1 is a shell-and-tube heat exchanger having a tube side and a shell side, raw material is fed into the tube side of the heater 1 through a feed pipe 4, steam is fed into the shell side of the heater 1 through a feed pipe 5, and the raw material is heated by the steam in the heater 1. The heated raw materials are discharged out of the heater 1 through the discharging pipe 6, the discharging pipe 6 is connected with the middle part of the feeding premixing tank 3, and the heated raw materials are conveyed into the feeding premixing tank 3 for mixing. Steam through the heat transfer passes through outlet duct 7 and discharges heater 1, and the lower part of outlet duct and condensate tank 2 is connected, carries the steam after the heat transfer to condensate tank 2 in and condenses into the liquid phase, and the condensate is discharged through setting up at condensate tank 2 lower part's fluid-discharge tube 8.

In above-mentioned technical scheme, in order to control feeding temperature, this application has set up temperature detection module and liquid level control module, and temperature detection module sets up in the feeding mixes jar 3 below in advance for detect the feeding and mix the raw materials temperature in jar 3 in advance, and liquid level control module sets up on condensate tank 2, is arranged in the liquid level of control condensate tank 2. Temperature detect module and liquid level control module intercommunication, temperature detect module give liquid level control module with temperature signal transmission, and liquid level control module controls the steam flow of input heater 1 through the control to the liquid level in condensate tank 2 to the realization is to the control of feed temperature.

Wherein, the temperature detection module is including setting up the temperature sensor 10 of jar 3 below discharge gate department in advance at the feeding, and the level control module is including setting up the level gauge two 11 at the tip of condensate tank 2 and setting up the control valve one 12 at fluid-discharge tube 8, and temperature sensor 10 and level gauge two 11 are connected, and level gauge two 11 are connected with control valve one 12. Specifically, temperature sensor 10 is arranged in detecting the feeding and mixes the raw materials temperature in jar 3 in advance to give two 11 level gauge with temperature signal transmission, two 11 level gauge receive the temperature signal of raw materials, set for a reasonable liquid level according to temperature signal, and detect the liquid level height of condensate tank 2, adjust the liquid level height in the condensate tank 2 through the aperture of adjustment control valve one 12, and then realize the steam flow of control input heater 1, finally reach the purpose of accurate control feeding temperature.

In addition, a gas phase balance pipeline 14 is arranged above the condensate tank 2, and is connected with the gas inlet pipe 5 for ensuring the pressure balance in the condensate tank 2.

In addition, a first liquid level meter 9 is arranged below the feeding premixing tank 3, a second control valve 13 is arranged on the discharging pipe 6, the first liquid level meter 9 is communicated with the second control valve 13, the liquid level in the feeding premixing tank 3 is ensured to be maintained at a normal height by adjusting the opening degree of the second control valve 13, and if the liquid level in the feeding premixing tank 3 is unstable, the stability of downstream production operation is influenced.

Although the illustrative embodiments of the present application have been described above to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the embodiments, and various modifications within the spirit and scope of the present application defined and determined by the appended claims will be apparent to those skilled in the art from this disclosure.

Claims

1. A feed preheating system, comprising:

a heater having:

a feed pipe for inputting the raw material to the heater;

a discharge tube disposed opposite the feed tube, the discharge tube for outputting the feedstock from the heater;

the air inlet pipe is used for inputting steam to the heater;

the air outlet pipe is arranged opposite to the air inlet pipe and is used for outputting the steam from the heater;

the condensate tank is connected with the heater through the gas outlet pipe;

the feeding premixing tank is connected with the heater through the discharging pipe;

the temperature detection module is arranged on the feeding premixing tank;

the liquid level control module is arranged on the condensate tank and communicated with the temperature detection module.

2. A feed preheating system according to claim 1, wherein the heater is a shell and tube heat exchanger.

3. A feed preheating system according to claim 1, wherein a drain is provided in a lower portion of the condensate tank.

4. A feed preheating system according to claim 3, wherein the liquid level control module comprises:

the liquid level meter II is arranged at the end part of the condensate tank;

the first control valve is arranged on the liquid discharge pipe, and the second liquid level meter is communicated with the control valve.

5. A feed preheating system according to claim 1, wherein the temperature detection module comprises a temperature sensor disposed at a discharge port below the feed premixer.

6. A feed preheating system according to claim 1, wherein a vapor phase equalization line is provided above the condensate tank.

7. A feeding preheating system as claimed in claim 1, wherein a first liquid level meter is disposed below the feeding premixing tank, a second control valve is disposed on the discharging pipe, and the first liquid level meter is communicated with the second control valve.