CN214794037U - Cracking gas sampling device of ethylene cracking furnace - Google Patents

Abstract

The utility model discloses a cracking gas sampling device of an ethylene cracking furnace, which comprises a heat preservation pipeline, a gas vortex refrigerator and a gas-liquid separation tank internally provided with a cyclone separator, an extension pipeline is formed at the outlet end of the heat preservation pipeline in an extending way and is connected with the inlet end of the coil pipe of the gas vortex refrigerator, the outlet end of the coil of the gas vortex refrigerator is connected with a gas-liquid separation tank through a pipeline, a liquid phase outlet at the lower end of the gas-liquid separation tank is connected with a first ball valve through a pipeline, a ball valve exit end has the receiving flask in order to realize that liquid phase flows to the receiving flask through the pipe connection, the gaseous phase export of gas-liquid separation jar upper end department has connected gradually filter, mass flowmeter, No. two ball valves and gasbag in order to realize the gaseous phase intercommunication through the pipeline, has simple structure, can solve technical characterstic such as the gas-liquid separation is incomplete, gas-liquid phase collection is inaccurate.

Description

Cracking gas sampling device of ethylene cracking furnace

Technical Field

The utility model relates to a sampling device, more specifically say a bit, relate to a pyrolysis gas sampling device of ethylene cracking furnace, belong to the petrochemical field.

Background

At present, a tubular cracking furnace is mainly adopted for the ethylene cracking furnace, but a plurality of chemical reaction parameters and processes in the furnace tube cannot be monitored, and the complex reaction state in the furnace tube can be inferred only through product calibration under different working conditions, so that optimization and adjustment are facilitated. The ethylene yield is an important index for measuring the economic benefit of the cracking device, so that the components of the cracking gas at the outlet of the cracking furnace are analyzed, the composition distribution of the cracking gas is mastered, the diene yield of the cracking product and the gas-liquid phase composition are analyzed, the raw material ratio and the operation parameter adjustment are effectively optimized, and an important basis is provided for optimizing the operation of the cracking furnace and improving the yields of ethylene and propylene. Therefore, the calibration experiment needs to be carried out on the ethylene cracking device, the cracked gas needs to be accurately sampled and analyzed in the calibration experiment, and the quality of the cracked gas sampling equipment is the key for accurately calibrating the ethylene cracking device.

Patent document CN202255988 discloses a cracking gas sampling device of an industrial ethylene cracking furnace, the device mainly comprises a water-cooled separator, an ice-cooled separator, a humidifier and a gas flowmeter, a stainless steel pipe is connected with a ball valve to ensure the strength and the sealing performance of the device, and simultaneously ice water is adopted for cooling, the sampling device can ensure the separation and the metering of gas and liquid phases in a cracking product, quickly obtain the separated gas and liquid phases, and meet the requirements of chromatographic analysis and tar distillation, the device is simple and convenient to move when the furnace is not calibrated, but the device still has the defects of poor sealing of a liquid phase collecting bottle and inaccurate liquid collection; inaccurate control precision, poor result repeatability, large amount of ice water for cooling, complex cooling system, and incapability of continuous sampling in a long period.

Patent document CN202599711 discloses a cracked gas sampling device of an ethylene cracking furnace, which mainly comprises 2 condensation shells, two liquid phase collection bottles, a humidifying bottle and a wet flowmeter. The device can implement online sample to industry ethylene cracking furnace, and characteristics such as small, convenient nimble carrying, but the device's condensing system still need a large amount of frozen water, and the condensation effect is not showing remarkably, and adopts the hose connection receiving flask, and the liquid phase receiving flask is sealed not good, and the junction is not hard up easily and leads to gas leakage, and liquid is collected inaccurately, influences the accuracy of liquid phase ration result, also has the difficult problem that can not long period continuous sampling simultaneously.

SUMMERY OF THE UTILITY MODEL

In order to solve the prior art problem, the utility model provides a pyrolysis gas sampling device of ethylene cracking furnace which has the technical characteristics of simple structure, incomplete gas-liquid separation, inaccurate gas-liquid phase collection and the like.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

the utility model provides a pyrolysis gas sampling device of ethylene cracking furnace, includes heat preservation pipeline, gas vortex refrigerator and the gas-liquid separation jar of being equipped with cyclone in, heat preservation pipeline exit end extends and is formed with the extension pipeline, the extension pipeline is connected with gas vortex refrigerator's coil pipe entrance point, gas vortex refrigerator's coil pipe exit end passes through the pipeline and is connected with the gas-liquid separation jar, the liquid phase export of gas-liquid separation jar lower extreme department has a ball valve through the pipe connection, a ball valve exit end has the receiving flask through the pipe connection in order to realize liquid phase flow to the receiving flask, the gaseous phase export of gas-liquid separation jar upper end department has connected gradually filter, mass flow meter, No. two ball valves and gasbag through the pipeline in order to realize gaseous phase intercommunication.

Preferably, the industrial air pipeline is connected with an inner chamber of the gas vortex refrigerator, and a third ball valve and a pressure valve are connected to the industrial air pipeline in sequence from the inlet end of the industrial air pipeline.

Preferably, still include the frame, gas vortex refrigerator, gas-liquid separation jar, ball valve, receiving flask, filter, mass flowmeter, No. two ball valves are all installed in the frame.

Preferably, a thermometer is connected to a pipeline between the gas vortex refrigerator and the gas-liquid separation tank.

Preferably, the thermal insulation pipeline is at least covered with a layer of thermal insulation layer to prevent the sample gas from condensing and adhering to the pipe wall.

Preferably, the gas vortex refrigerator is a jacket gas vortex refrigerator, industrial air enters the industrial air pipeline, and the industrial air is used as a cold source and is introduced into a gas vortex refrigerator cavity for heat exchange.

Preferably, it has sample gas to get into in the heat preservation pipeline, sample gas gets into gas-liquid separation jar after getting into gas vortex refrigerator's coil pipe internal cooling, gas-liquid separation tank top has cyclone, and the gaseous phase after the separation gets into the gasbag through filter, mass flowmeter, stop valve, gas-liquid separation jar bottom connecting line is the hyaline tube, and the liquid phase dams through a ball valve after the separation, a ball valve is apart from separation tank bottom 3-7cm, controls the liquid phase through observing the hyaline tube and flows out in order to guarantee the liquid level.

Has the advantages that: the gas vortex refrigerator saves a large amount of ice water, is simple to operate and good in cooling effect, and can effectively cool pyrolysis gas of the industrial ethylene cracking furnace and realize gas-liquid separation; the transparent pipe at the outlet of the gas-liquid separation tank is tightly connected with the collecting bottle, and the top of the gas-liquid separation tank is provided with the cyclone separator, so that the structure is simple, the operation is easy, and the liquid phase collecting accuracy is obviously improved; the gas-liquid separation tank is arranged, is not limited by the load of a cooling system and the volume of a liquid phase collecting container, and can realize long-period continuous sampling; the frame design adopts the sled dress structure, but the bulk movement makes things convenient for the sample of many pyrolysis furnaces to use.

Drawings

FIG. 1 is a schematic diagram of cracked gas sampling equipment of an ethylene cracking furnace.

Wherein the reference numerals are:

1-heat preservation pipeline; 2-gas vortex refrigerator; 3-a gas-liquid separation tank; 4-a filter; 5-mass flow meter; 6-collecting bottle; 7-air bag; 8-ball valve number one; 9-ball valve II.

Detailed Description

The present invention will be further described with reference to the drawings attached to the specification, but the present invention is not limited to the following embodiments.

Industrial air pipeline and service station industrial air pipeline are connected, utilize heat preservation pipeline 1 to connect the sample gas appearance point, and heat preservation pipeline 1 is the pipeline of outsourcing heat preservation, prevents that pyrolysis gas from cooling at the sampling in-process, influences the testing result, and industrial air pipeline sets up independent pressure valve for adjust suitable pressure and get into gas vortex refrigerator 2, be used for the sample gas cooling, gas vortex refrigerator 2 adopts industrial air cooling, 3 top installation cyclone of gas-liquid separation jar are more favorable to gas-liquid separation, collecting bottle 6 sets up in box (frame) is internal, and the inseparable space of shelving is established in the inseparable combination, and sampling device wholly is box integration of sled dress, and is small, easily removes easy operation.

Fig. 1 shows a specific embodiment of a cracked gas sampling device of an ethylene cracking furnace, which comprises a heat preservation pipeline 1, a gas vortex refrigerator 2 and a gas-liquid separation tank 3 with a cyclone separator arranged inside, an extension pipeline is formed at the outlet end of the heat preservation pipeline 1 in an extending way, the extension pipeline is connected with the inlet end of the coil pipe of the gas vortex refrigerator 2, the outlet end of the coil of the gas vortex refrigerator 2 is connected with the gas-liquid separation tank 3 through a pipeline, the liquid phase outlet at the lower end of the gas-liquid separation tank 3 is connected with a first ball valve 8 through a pipeline, the outlet end of the first ball valve 8 is connected with a collecting bottle 6 through a pipeline to realize the liquid phase flow to the collecting bottle 6, and a gas phase outlet at the upper end of the gas-liquid separation tank 3 is sequentially connected with a filter 4, a mass flow meter 5, a second ball valve 9 and an air bag 7 through pipelines so as to realize gas phase communication. The industrial air pipeline is connected with an inner cavity of the gas vortex refrigerator 2, and a third ball valve and a pressure valve are sequentially connected to the industrial air pipeline from the inlet end of the industrial air pipeline. The gas vortex refrigerator comprises a gas vortex refrigerator 2, a gas-liquid separation tank 3, a first ball valve 8, a collecting bottle 6, a filter 4, a mass flow meter 5 and a second ball valve 9, and is characterized by further comprising a frame. A thermometer is connected on a pipeline between the gas vortex refrigerator 2 and the gas-liquid separation tank 3. The heat-insulating pipeline 1 is at least wrapped with a heat-insulating layer to prevent sample gas from condensing and adhering to the pipeline wall. The gas vortex refrigerator 2 is a jacket gas vortex refrigerator, industrial air enters the industrial air pipeline, and the industrial air is used as a cold source and is introduced into the cavity of the gas vortex refrigerator 2 for heat exchange. Get into in the heat preservation pipeline 1 and have sample gas, sample gas gets into gas-liquid separation jar 3 after getting into gas vortex refrigerator 2's coil pipe internal cooling, 3 tops of gas-liquid separation jar have cyclone, and the gaseous phase after the separation gets into gasbag 7 through filter 4, mass flow meter 5, stop valve 9, 3 bottom connecting line of gas-liquid separation jar are the hyaline tube, and the liquid phase dams through a ball valve 8 after the separation, a ball valve is apart from separation tank bottom 3-7cm, controls the liquid phase through observing the hyaline tube and flows out in order to guarantee the liquid level.

The sample gas import is connected to 1 one end of thermal insulation pipeline, gaseous vortex refrigerator 2 is connected to one end, 2 export installation thermometers of gaseous vortex refrigerator, 2 coil pipe connection gas-liquid separation jar 3 of gaseous vortex refrigerator, gaseous phase export connects gradually filter 4, mass flow meter 5, No. two ball valves 9, No. one ball valve 8 is connected to 3 bottoms of gas-liquid separation jar, collect the liquid bottle 6, sled dress equipment (pyrolysis gas sampling device of ethylene cracking furnace) removes sample gas import thermal insulation pipeline, the industrial air pipeline that admits air, gaseous phase sampling pipeline, other all establish in the frame.

The heat preservation pipeline 1 is externally coated with a heat preservation layer to prevent sample gas from condensing at the heat preservation pipeline and adhering to the pipeline wall; gas vortex refrigerator 2 is for pressing from both sides cover gas vortex refrigerator, industrial air lets in the cavity heat transfer as the cold junction, the sample gas gets into gas vortex refrigerator 2 coil pipe cooling back and gets into gas- liquid separation jar 3, 3 tops of gas-liquid separation jar have cyclone, after the separation, gaseous phase process filter 4, mass flowmeter 5, No. two ball valves 9 get into the gaseous phase sample connection, 3 bottom connecting line of gas-liquid separation jar are the transparent pipe, the liquid phase dams through ball valve 8 after the separation, ball valve 8 is apart from the separation tank bottom about 5cm (preferred) distance, the accessible is observed the transparent pipe and is controlled the liquid phase and is flowed out, guarantee certain liquid level, also can carry out the liquid phase and collect in the sampling process, do not receive the container volume restriction of collection.

Finally, it should be noted that the present invention is not limited to the above embodiments, and many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.

Claims (7)

1. The utility model provides a pyrolysis gas sampling device of ethylene cracking furnace which characterized in that: comprises a heat preservation pipeline (1), a gas vortex refrigerator (2) and a gas-liquid separation tank (3) internally provided with a cyclone separator, the outlet end of the heat preservation pipeline (1) extends to form an extension pipeline which is connected with the inlet end of the coil pipe of the gas vortex refrigerator (2), the outlet end of the coil of the gas vortex refrigerator (2) is connected with the gas-liquid separation tank (3) through a pipeline, a liquid phase outlet at the lower end of the gas-liquid separation tank (3) is connected with a first ball valve (8) through a pipeline, the outlet end of the first ball valve (8) is connected with a collecting bottle (6) through a pipeline to realize that liquid phase flows to the collecting bottle (6), and a gas phase outlet at the upper end of the gas-liquid separation tank (3) is sequentially connected with a filter (4), a mass flow meter (5), a second ball valve (9) and an air bag (7) through pipelines so as to realize gas phase communication.

2. The pyrolysis gas sampling device of the ethylene cracking furnace according to claim 1, characterized in that: the industrial air pipeline is connected with an inner cavity of the gas vortex refrigerator (2), and a third ball valve and a pressure valve are sequentially connected to the industrial air pipeline from the inlet end of the industrial air pipeline.

3. The pyrolysis gas sampling device of the ethylene cracking furnace according to claim 1, characterized in that: the gas vortex refrigerator is characterized by further comprising a frame, wherein the gas vortex refrigerator (2), the gas-liquid separation tank (3), the first ball valve (8), the collecting bottle (6), the filter (4), the mass flow meter (5) and the second ball valve (9) are all installed in the frame.

4. The cracked gas sampling device of an ethylene cracking furnace as claimed in claim 1, 2 or 3, wherein: a thermometer is connected on a pipeline between the gas vortex refrigerator (2) and the gas-liquid separation tank (3).

5. The pyrolysis gas sampling device of the ethylene cracking furnace according to claim 1, characterized in that: the heat-insulating pipeline (1) is at least wrapped by a heat-insulating layer to prevent sample gas from condensing at the heat-insulating layer and adhering to the wall of the pipeline.

6. The pyrolysis gas sampling device of the ethylene cracking furnace according to claim 2, characterized in that: the gas vortex refrigerator (2) is a jacket gas vortex refrigerator, industrial air enters the industrial air pipeline and is used as a cold source and introduced into a cavity of the gas vortex refrigerator (2) for heat exchange.

7. The cracked gas sampling device of an ethylene cracking furnace as claimed in claim 1, 2 or 3, wherein: the top of the gas-liquid separation tank (3) is provided with a cyclone separator, a connecting pipeline at the bottom of the gas-liquid separation tank (3) is a transparent pipe, the distance between the first ball valve and the bottom of the separation tank is 3-7cm, and the liquid level is ensured by observing the transparent pipe to control the liquid phase to flow out.

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