Closed decoking waste gas treatment device

Abstract

The utility model discloses a closed decoking waste gas treatment device which comprises a closed bin arranged above a coke pit and a centrifugal fan arranged outside the closed bin, an air inlet hole is arranged on the outer wall of the closed bin and is far away from the centrifugal fan, the closed bin is matched with a water washing tower through the centrifugal fan, the water washing tower is provided with a circulating pump, and the circulating pump is communicated with the air inlet hole. An exhaust pipe is connected between the centrifugal fan and the sealing bin, and an air supply pipe is connected between the centrifugal fan and the water washing tower; the equipment can effectively reduce the adverse influence of dust and volatile pollution gas in the waste gas in the decoking process on human health and surrounding environment, and ensures that the environmental treatment effect meets the relevant national environmental protection requirements.

Description

Technical Field

[0001] The utility model relates to a closed decoking waste gas treatment device. Background Art

[0002] Most delayed coking units use an open hydraulic decoking method, and most operations are carried out in the open air. Needle coke often produces a large amount of dust, steam and volatile pollutant gases during the decoking, transportation and storage process. Even if calculated based on a 1% volatility, it will have adverse effects on human health and the surrounding environment. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a closed decoking waste gas treatment device to solve the problem of adverse effects on human health and the surrounding environment caused by a large amount of steam, dust and volatile pollutant gas generated during open hydraulic decoking.

[0004] The utility model is realized by the following technical solutions:

[0005] A closed decoking waste gas treatment device comprises a closed bin installed above a coke pit, and a centrifugal fan installed outside the closed bin, an air inlet is provided on the outer wall of the closed bin away from the centrifugal fan, a water scrubber is provided through the centrifugal fan, the water scrubber is equipped with a circulation pump, an exhaust duct is connected between the centrifugal fan and the closed bin, and an air supply duct is connected between the centrifugal fan and the water scrubber.

[0006] Preferably, the water washing tower includes a tower body, a plurality of brackets are arranged below the tower body, the tower body is suspended under the action of the brackets, a conical air outlet hood is arranged at the upper end of the tower body, the air supply pipe is connected to the upper middle position of the tower body, a water suction pipe is connected between the circulation pump and the tower body, and a water supply pipe is connected between the circulation pump and the air outlet hood.

[0007] Preferably, a spherical base is provided at the bottom of the tower body, a sewage pipe is provided at the bottom of the spherical base, and a sewage valve is installed on the sewage pipe.

[0008] Preferably, a water inlet pipe is installed on the outer wall of the tower body at a position higher than the water pumping pipe, and a water inlet valve is installed on the water inlet pipe.

[0009] Preferably, an air guide hood is provided on the top of the tower body, and a bottom edge portion is provided at the bottom of the air guide hood. The bottom edge portion and the inner wall of the tower body are welded and sealed, and an air vent is provided in a ring shape on the surface of the bottom edge portion. The upper end of the air guide hood is closed, and a ventilation gap is formed between the air guide hood and the air outlet hood. The width of the formed ventilation gap gradually narrows upward, and the water sprayed from the water supply pipe flows down along the ventilation gap and falls back into the tower body from the air vent.

[0010] Preferably, an impeller is rotatably arranged at the upper end of the air guide cover, and the water supply pipe and the air outlet cover are eccentrically arranged so that the water flow sprayed from the water supply pipe flushes the impeller.

[0011] The beneficial effects of the utility model are:

[0012] (1) The required equipment has a simple structure, low investment, high safety, and strong reliability. There is no complex equipment, and the subsequent maintenance is simple, which takes up less time of maintenance personnel. The maintenance and replacement of smaller parts can be completed quickly on site, and the maintenance cost is low;

[0013] (2) It can effectively reduce the adverse effects of dust and volatile pollutants in the waste gas during the decoking process on human health and the surrounding environment, ensuring that the environmental management effect meets the relevant national environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is the structural diagram of the water washing tower;

[0017] Figure 3 A top view of the air shroud. DETAILED DESCRIPTION

[0018] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0019] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0020] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In addition, in the description of the present invention, “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "set", "socket", "connect", "penetrate", "plug in" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figure 1 A closed decoking waste gas treatment device is shown, comprising a closed bin 1 installed above the coke pit, and a centrifugal fan 2 installed outside the closed bin 1, an air inlet 101 is provided on the outer wall of the closed bin 1, away from the centrifugal fan 2, the air inlet 101 is provided to avoid excessive sealing causing the closed bin 1 to be sucked flat, the closed bin 1 adopts a membrane structure with a steel frame inside, a water scrubber 3 is cooperated with the centrifugal fan 2, the water scrubber 3 is equipped with a circulating pump 4, an exhaust pipe 21 is connected between the centrifugal fan 2 and the closed bin 1, and an air supply pipe 22 is connected between the centrifugal fan 2 and the water scrubber 3.

[0024] In the above technical solution, the coke pit of the open hydraulic decoking system is closed by a closed chamber 1, and the exhaust gas is reversely contacted with the circulating solution delivered by the circulating pump to absorb the dust and volatile pollutant gases in the exhaust gas, and then the treated exhaust gas that meets the emission standards is discharged into the atmosphere.

[0025] See also Figure 1 and Figure 2 As shown, the water washing tower 3 includes a tower body 31, and a plurality of brackets 32 are arranged below the tower body 31. The tower body 31 is suspended under the action of the brackets 32. A conical air outlet hood 33 is arranged at the upper end of the tower body 31. The air supply pipe 22 is connected to the upper and middle position of the tower body 31. A water suction pipe 41 is connected between the circulating pump 4 and the tower body 31, and a water supply pipe 42 is connected between the circulating pump 4 and the air outlet hood 33.

[0026] In the above technical solution, the solution is pumped by the circulation pump 4 and transported to the air outlet hood 33 to achieve full contact between the solution and the exhaust gas. Then the solution is refluxed and re-extracted to achieve cyclic spraying.

[0027] See also Figure 2 As shown, a spherical base 331 is provided at the bottom of the tower body 31 , a sewage pipe 332 is provided at the bottom of the spherical base 331 , and a sewage valve 333 is installed on the sewage pipe 332 .

[0028] The above technical solution is mainly used to gather particulate matter and facilitate its cleaning.

[0029] See also Figure 2 As shown, a water inlet pipe 334 is installed on the outer wall of the tower body 31 at a position higher than the water pumping pipe, and a water inlet valve 335 is installed on the water inlet pipe 334 .

[0030] The aqueous solution enters the water inlet pipe 334.

[0031] See also Figure 2 and Figure 3 As shown, an air guide cover 5 is provided on the top of the tower body 31, and a bottom edge portion 51 is provided at the bottom of the air guide cover 5. The bottom edge portion 51 and the inner wall of the tower body 31 are welded and sealed, and a vent hole 52 is provided in a ring shape on the surface of the bottom edge portion 51. The upper end of the air guide cover 5 is closed, and a ventilation gap is formed between the air guide cover 5 and the air outlet cover 33. The width of the formed ventilation gap gradually narrows upward, and the water sprayed from the water supply pipe 42 flows down along the ventilation gap and falls back into the tower body 31 from the vent hole 42.

[0032] In the above technical solution, the air guide hood 5 is used to reduce the gap through which the exhaust gas can pass, thereby facilitating uniform contact with the sprayed solution, thereby increasing the contact rate with the exhaust gas and the capture rate of particulate matter in the exhaust gas.

[0033] The water flowing down from the vent hole 42 forms a water curtain in the tower body 31, comes into contact with the exhaust gas entering initially, and then falls back.

[0034] See also Figure 2 and Figure 3 As shown, an impeller 6 is rotatably provided at the upper end of the air guide cover 5 , and the water supply pipe 42 and the air outlet cover 33 are eccentrically provided so that the water flow sprayed from the water supply pipe 42 flushes the impeller 6 .

[0035] The function of the impeller is to form water mist after being scour by the water flow, thereby increasing the contact rate with the exhaust gas. Secondly, the impeller 6 generates an upward lifting force after rotating, which helps to discharge the treated exhaust gas.

[0036] The working principle and process are as follows: an intelligent material taking system is used in the closed warehouse, and the needle coke in the coke pit is grabbed and transferred by remote control in the operating room. The system can automatically complete the full cycle of delayed coking and decoking, realize unmanned control, safer operation, more stable operation, high coke grabbing efficiency, and reduce labor intensity and personal safety. When the needle coke device is hydraulically decoking, a large amount of steam, dust, and volatile pollutant gas is generated. A centrifugal fan is used to send the waste gas to the feed port of the water washing tower through a pipeline. At the same time, the circulating pump of the water washing tower transports the circulating solution in the tower kettle to the upper part of the tower for spraying, so that the waste gas and the circulating solution are in reverse contact, absorbing the dust and volatile pollutant gas in the waste gas, and condensing the steam, so that the waste gas meets the emission standards; achieves waste gas emission standards and green production, and significantly improves the production and surrounding environment, eliminating the odor in the surrounding environment.

[0037] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A closed decoking waste gas treatment device, characterized in that: It includes a closed bin installed above the coke pit, and a centrifugal fan installed outside the closed bin. An air inlet is provided on the outer wall of the closed bin away from the centrifugal fan. A water washing tower is cooperated with the centrifugal fan. The water washing tower is equipped with a circulation pump. An exhaust pipe is connected between the centrifugal fan and the closed bin, and an air supply pipe is connected between the centrifugal fan and the water washing tower.

2. The closed decoking waste gas treatment device according to claim 1, characterized in that: The water washing tower includes a tower body, a plurality of brackets are arranged below the tower body, the tower body is suspended under the action of the brackets, a conical air outlet hood is arranged at the upper end of the tower body, the air supply pipe is connected to the middle and upper part of the tower body, a water suction pipe is connected between the circulation pump and the tower body, and a water supply pipe is connected between the circulation pump and the air outlet hood.

3. The closed decoking waste gas treatment device according to claim 2, characterized in that: A spherical base is arranged at the bottom of the tower body, a sewage pipe is arranged at the bottom of the spherical base, and a sewage valve is installed on the sewage pipe.

4. The closed decoking waste gas treatment device according to claim 3 is characterized in that: A water inlet pipe is installed on the outer wall of the tower body at a position higher than the water pumping pipe, and a water inlet valve is installed on the water inlet pipe.

5. The closed decoking waste gas treatment device according to claim 2, characterized in that: An air guide hood is arranged on the top of the tower body, and a bottom edge portion is arranged at the bottom of the air guide hood. The bottom edge portion and the inner wall of the tower body are welded and sealed, and an air vent is arranged in a ring on the surface of the bottom edge portion. The upper end of the air guide hood is closed, and a ventilation gap is formed between the air guide hood and the air outlet hood. The width of the formed ventilation gap gradually narrows upwards, and the water sprayed from the water supply pipe flows down along the ventilation gap and falls back into the tower body from the air vent.

6. The closed decoking waste gas treatment device according to claim 5, characterized in that: An impeller is rotatably arranged at the upper end of the air guide cover, and the water supply pipe and the air outlet cover are eccentrically arranged so that the water flow sprayed from the water supply pipe flushes the impeller.

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