CN219409623U - Kerosene gas recovery system - Google Patents

Abstract

The utility model aims to provide a kerosene gas recovery system which is used for improving the recovery rate of kerosene in hot flue gas so as to reduce the emission of kerosene gas, save the cost and protect the environment. The device comprises a crude collecting device for preliminarily cooling hot flue gas to collect condensed kerosene liquid and a separation and filtration component for treating the flue gas discharged by the crude collecting device; the separation filter assembly includes a condenser for condensing the gaseous kerosene into droplets and a mist eliminator in communication with the condenser for filtering the droplets of kerosene. The condenser again carries out more careful condensation treatment on the hot flue gas, and condenses most of the gaseous kerosene into small liquid drops. The demister is used for filtering small kerosene droplets in the flue gas, and filtering the droplets to the collecting device after collecting the droplets, so that most kerosene in the hot flue gas is obtained through condensation and filtration, and further the recovery rate of the kerosene is improved, the content of kerosene gas in the hot flue gas is reduced, and the environment is protected. The recovered kerosene can be reused, thereby saving the cost.

Description

Kerosene gas recovery system

Technical Field

The utility model belongs to the technical field of kerosene gas recovery, and particularly relates to a kerosene gas recovery system.

Background

In industrial production, kerosene is added to some raw materials and heated in an oven during production to form hot flue gas with gaseous kerosene. Since the hot flue gas has a positive pressure, a flue gas outlet is required for discharging the flue gas. Before the flue gas is discharged, the kerosene gas in the flue gas needs to be recovered. Chinese patent document publication No. CN213012690U discloses a kerosene smoke recovery system. The system comprises a kerosene gas recovery device, a kerosene adsorption and filtration device communicated with the kerosene gas recovery device, and a mixed oil separation device communicated with the kerosene adsorption and filtration device. The system comprehensively recovers the generated kerosene gas through the gas collecting hood, then carries out adsorption and filtration treatment, and separates the treated mixed oil, thereby realizing the purification treatment of the gas and the recovery of kerosene in the gas. However, this recovery system still has the following drawbacks: the kerosene gas is recovered only through the gas collecting hood, the recovery rate of the kerosene is low, and the gas emission with the kerosene pollutes the environment.

Disclosure of Invention

The utility model aims to provide a kerosene gas recovery system which is used for improving the recovery rate of kerosene in hot flue gas so as to reduce the emission of kerosene gas, save the cost and protect the environment.

The technical aim of the utility model is realized by the following technical scheme:

a kerosene gas recovery system comprising a coarse collection device for initially cooling hot flue gas to collect condensed kerosene liquid, and further comprising a separation filter assembly for treating flue gas exiting said coarse collection device; the separation filter assembly includes a condenser for condensing the gaseous kerosene into droplets and a mist eliminator in communication with the condenser for filtering the droplets of kerosene.

Thus, the hot flue gas is initially condensed by the coarse collecting device, wherein part of the gaseous kerosene is directly condensed into liquid kerosene and then collected. The coarse collecting device may be a common exhaust pipe placed in the cold water tank. And the primarily treated hot flue gas is introduced into a separation filter assembly, and the separation filter assembly comprises a condenser and a demister. The condenser again carries out more careful condensation treatment on the hot flue gas, and condenses most of the gaseous kerosene into small liquid drops. The flue gas with the small droplets continues to circulate until it passes to the demister. The demister is used for filtering small kerosene droplets in the flue gas, and filtering the droplets to the collecting device after collecting the droplets, so that most kerosene in the hot flue gas is obtained through condensation and filtration, and further the recovery rate of the kerosene is improved, the content of kerosene gas in the hot flue gas is reduced, and the environment is protected. The recovered kerosene can be reused, thereby saving the cost.

Preferably, the filter comprises more than two groups of separation filter components, wherein one demister is arranged at the flue gas outlet

Preferably, an inertial separator for separating gas from kerosene droplets is mounted on the gas flow path between the two separation filter assemblies.

Preferably, the separation filter assembly is in communication with the inertial separator via a conduit having a height of no less than 15 meters.

Preferably, the device comprises a collecting device for collecting kerosene, a filtering device communicated with the collecting device and used for filtering out impurities in kerosene liquid, and an oil filtering device used for oil-water separation.

Preferably, a valve for adjusting the flow rate of kerosene is installed between the collecting device and the filtering device.

Preferably, the coarse collecting device includes a fume exhaust duct placed in the cooling water tank to circulate fume.

Preferably, the filter device comprises a filter bag and mineral attapulgite clay disposed within the filter bag.

Preferably, the condenser is a shell-and-tube condenser.

Preferably, the demister is a wire mesh demister.

In summary, the embodiment of the utility model has the following beneficial effects:

1. the hot flue gas passes through the coarse collecting device, the condenser and the demister in the separation filtering component in sequence, and the plurality of devices perform condensation and filtration for a plurality of times, so that the recovery rate of kerosene is improved.

2. The condenser is a shell-and-tube condenser, and has the advantages of convenient installation, high heat transfer efficiency, good condensation effect, convenient cleaning and the like; the demister is a wire mesh demister, and the wire mesh demister has the advantages of small pressure drop, large specific surface area and high demisting efficiency.

3. The filter comprises more than two groups of sequentially communicated separation filter components, and the number of the separation filter components is increased to increase the number of times of filtering the smoke, so that the recovery rate of kerosene is improved.

4. An inertial separator for separating gas and kerosene droplets is arranged on an airflow flow path between the two separation filter assemblies, and the kerosene droplets or fog droplets in the flue gas are separated, so that the recovery rate of kerosene is further improved.

5. Comprises a filtering device for filtering out impurities in kerosene liquid and an oil filtering device for oil-water separation.

6. A valve for adjusting the flow of kerosene is arranged between the collecting device and the filtering device. The speed of kerosene filtration can be regulated after the valve is arranged.

Drawings

Fig. 1 is a schematic diagram of the present embodiment.

In the figure:

1. coarse collecting device 11, exhaust pipe, 2, separation filter assembly, 21, condenser, 22, defroster, 3, collecting device, 4, inertial separator, 5, filter equipment, 6, oil filter.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.

Example 1 as shown in fig. 1, a kerosene gas recovery system comprising a crude collection device 1 for preliminarily cooling hot flue gas to collect condensed kerosene liquid, and further comprising a separation filter assembly 2 for treating flue gas discharged from the crude collection device 1; the separation filter assembly 2 includes a condenser 21 for condensing the gaseous kerosene into droplets and a demister 22 communicating with the condenser 21 for filtering the kerosene droplets.

The hot flue gas is first subjected to preliminary condensation by the coarse collecting device 1, wherein part of the gaseous kerosene is directly condensed into liquid kerosene and then collected. The coarse collecting device 1 comprises a smoke exhaust pipe 11 placed in a cooling water tank for smoke to circulate. The water in the cold water tank can flow circularly to reduce the water temperature. The number and positions of the smoke exhaust pipes 11 can be designed according to actual requirements.

The hot flue gas discharged from the coarse collecting device 1 is introduced into the separation filter assembly 2 through a ventilation structure such as a pipe, and the separation filter assembly 2 includes a condenser 21 and a demister 22. The flue gas is first introduced into a condenser 21, and the condenser 21 performs more careful condensation treatment on the introduced hot flue gas again. Specifically, the flue gas is introduced into a plurality of condensing pipelines, water is introduced outside the condensing pipelines, and the flue gas in the pipelines is condensed by utilizing the water. The most gaseous kerosene condenses into small droplets and flows through the internal flow conduit to the collection device 3. The condenser 21 is a shell-and-tube condenser, and has the advantages of convenient installation, high heat transfer efficiency, good condensing effect, convenient cleaning and the like.

The flue gas passing through the condenser 21 may have uncollected kerosene droplets, and the flue gas with the kerosene droplets and the kerosene gas continues to flow to the demister 22, and compared with the condenser 22, the demister 22 is in direct contact with the flue gas, the contact area is large, and the kerosene recovery rate can be improved. Specifically, the droplets are filtered directly to the collection device 3 as they pass through the mist eliminator 22; the kerosene smoke is condensed to form small droplets after flowing to the surface of the demister 22, and the small droplets are condensed to form large droplets and filtered to the collecting device 3. So far, most kerosene in the hot flue gas is obtained by condensation and filtration, so that the recovery rate of the kerosene is improved, the content of kerosene gas in the hot flue gas is reduced, and the environment is protected. The recovered kerosene can be reused, thereby saving the cost. The mist eliminator 22 is a wire mesh mist eliminator in the prior art, and has advantages of small pressure drop, large specific surface area and high mist eliminating efficiency.

As shown in fig. 1, two or more sets of the separation filter assemblies 2 are included. By increasing the number of separation filter assemblies 2, the number of times of filtration of the flue gas is increased, thereby improving the recovery rate of kerosene. One of the mist eliminators 22 is disposed at the flue gas discharge port to ensure that the discharge content meets environmental standards.

An inertial separator 4 for separating gas and kerosene droplets is mounted on the gas flow path between the two separation filter assemblies 2. The hot flue gas has a certain speed in the circulation process, and the inertial separator 4 is arranged on the flue gas flowing path like an obstacle, so that when the air flow bypasses the obstacle, sudden turning occurs, particles or liquid drops collide on the obstacle and are collected, and the gas liquid drops are collected. The inertial separator 4 may be a PTFE filled ring of the prior art.

Specifically, the separation filter assembly 2 is communicated with the inertial separator 4 through a pipeline, and the height of the pipeline is not less than 15 meters. The longer the length of the conduit, the gas has a temperature that can be reduced by time, thus allowing a better condensation filtering effect to be achieved in the second separation filter assembly 2.

Comprises a filtering device 5 communicated with the collecting device 3 and used for filtering out impurities in kerosene liquid and an oil filtering device 6 used for oil-water separation. A valve for adjusting the flow rate of kerosene is arranged between the collecting device 3 and the filtering device 5. The speed of kerosene filtration can be regulated after the valve is arranged. The filter device 5 comprises a filter bag and mineral attapulgite clay arranged in the filter bag.

Claims (10)

1. A kerosene gas recovery system comprising a coarse collecting device (1) for initially cooling hot flue gas to collect condensed kerosene liquid, characterized by further comprising a separation filter assembly (2) for treating flue gas exiting said coarse collecting device (1); the separation filter assembly (2) comprises a condenser (21) for condensing the gaseous kerosene into droplets and a demister (22) which is communicated with the condenser (21) and is used for filtering the kerosene droplets.

2. A kerosene gas recovery system according to claim 1, comprising more than two sets of said separation filter assemblies (2), wherein one of said mist eliminators (22) is provided at the flue gas discharge opening.

3. A kerosene gas recovery system according to claim 2, wherein an inertial separator (4) for separating gas from kerosene droplets is mounted in the gas flow path between the two separation filter assemblies (2).

4. A kerosene gas recovery system according to claim 3, wherein the separation filter assembly (2) is in communication with the inertial separator (4) via a conduit having a height of not less than 15 meters.

5. A kerosene gas recovery system according to claim 1, comprising a collecting device (3) for collecting kerosene and a filtering device (5) for filtering out impurities in kerosene liquid and an oil filtering device (6) for oil-water separation communicating with the collecting device (3).

6. A kerosene gas recovery system according to claim 5, characterized in that a valve for regulating the flow of kerosene is installed between the collecting device (3) and the filtering device (5).

7. A kerosene gas recovery system according to claim 1, characterized in that the coarse collecting device (1) comprises a fume duct (11) placed in a cooling water tank for the passage of fumes.

8. A kerosene gas recovery system according to claim 5, wherein the filter means (5) comprises a filter bag and mineral clay disposed within the filter bag.

9. A kerosene gas recovery system according to claim 1, wherein the condenser (21) is a shell-and-tube condenser.

10. A kerosene gas recovery system according to claim 1, wherein the mist eliminator (22) is a wire mesh mist eliminator.