Pipeline type decoking waste gas dehumidification dryer

Abstract

The utility model discloses a pipeline type decoking waste gas dehumidification dryer, decoking water-containing waste gas enters a cooling condensation tube bundle of the dehumidification dryer, and a baffle plate is arranged outside the cooling condensation tube bundle so as to improve the flow speed of cooling water; after the water-containing waste gas exchanges heat with cold water, condensed water in the waste gas is removed from a liquid removal tank at the bottom of the cooling condensation tube bundle and enters a dehydration bag of the dehydration section, gas enters the heating and drying section from the top of the cooling condensation tube bundle through the dehydration section, and dehydrated water in the dehydration bag is discharged to a sewage treatment system under the control of a liquid level; the dehumidified waste gas enters an inner spiral heating pipe of the heating and drying section from the dehydration section; through three procedures of cooling condensation, dehydration and heating, a large amount of moisture in decoking waste gas is removed before the decoking waste gas enters the air flue of the coking heating furnace, the temperature of the waste gas is increased, and the phenomenon of water vapor condensation is avoided, so that the safety and the high efficiency of the delayed coking heating furnace are improved.

Description

Technical Field

[0001] This utility model belongs to the field of dryer technology, and specifically relates to a pipeline-type dehumidifying dryer for desiccant exhaust gas. Background Technology

[0002] To improve the environmental protection level of delayed coking units and reduce VOC emissions, it is necessary to optimize and upgrade closed coking systems. Regardless of the type of closed coking technology, the coking waste gas needs to be recovered and treated. Currently, most waste gas treatment technologies adopt a process route of collection, cooling, alkaline washing and desulfurization, and incineration in a heating furnace. The coking waste gas has high temperature and high humidity, and the treated waste gas has a high water content. The waste gas is used as air distribution for incineration in the delayed coking heating furnace, which increases the heat loss of the heating furnace and affects its thermal efficiency. The water in the waste gas is easy to condense in the air duct, causing air duct corrosion and adversely affecting the operation of the heating furnace.

[0003] Therefore, it is essential to install a dehumidifier before the treated coking exhaust gas enters the coking furnace duct to remove a large amount of moisture from the exhaust gas, increase the exhaust gas temperature to avoid water vapor condensation, and ensure the safe and efficient operation of the delayed coking furnace. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a pipeline-type dehumidifying dryer for coke removal exhaust gas, which can solve the problems existing in the prior art.

[0005] To solve the above problems, the technical solution provided by this utility model is as follows:

[0006] This utility model embodiment provides a pipeline type desiccant dehumidification dryer, including a dehumidification dryer shell (1), the dehumidification dryer shell (1) includes a cooling condensation section, a dehydration section and a heating drying section, the cooling condensation section, the dehydration section and the heating drying section are connected by a connecting flange (7);

[0007] The cooling and condensing section is provided with a cooling and condensing tube bundle (2), and a coalescing dehydration element (3) is installed inside the cooling and condensing tube bundle (2). A dehydration tank is provided at the bottom of the gas outlet of the cooling and condensing tube bundle (2). A baffle plate (5) is provided outside the cooling and condensing tube bundle (2). The dehumidifier shell (1) is provided with a cold water outlet (9) and a cold water inlet (8) on the upper and lower sides corresponding to the cooling and condensing section, respectively.

[0008] A water separator is provided at the bottom of the dehydration section, a dehydration drain outlet (12) is provided at the bottom of the water separator, a level gauge port (15) is provided on the water separator, a baffle plate (6) is provided behind the airflow direction of the water separator, and a sharp hole is opened at the bottom of the water separator to prevent liquid from accumulating behind the baffle plate (6); a thermometer port (13) and a pressure gauge port (14) are provided at the top of the dehydration section;

[0009] The heating drying section is provided with an inner spiral heating pipe (4), and baffles (5) are arranged outside the inner spiral heating pipe (4).

[0010] In an optional embodiment of the utility model, the dewatering and draining port (12) of the water distribution bag is connected with a sewage treatment system.

[0011] In an optional embodiment of the utility model, the inner wall of the inner spiral heating pipe (4) adopts a spiral structure.

[0012] Beneficial effects: the utility model discloses a pipeline type decoking waste gas dehumidifying dryer, and the water-containing waste gas enters the cooling condensing pipe bundle in the dehumidifying dryer, in order to improve the cooling condensing effect in the pipe, the coalescence dewatering element is arranged in the cooling condensing pipe bundle, so that the condensed water droplets grow up and are separated from the gas better, the cooling water is arranged outside the cooling condensing pipe bundle, the cooling water can be chilled water or fresh water, the cold water inlet is arranged at the lower part of the dehumidifying dryer shell, and the cold water outlet is arranged at the upper part, in order to improve the heat exchange effect outside the pipe, the baffle is arranged outside the cooling condensing pipe bundle to improve the flow rate of the cooling water, after the water-containing waste gas exchanges heat with the cold water, the condensed water in the waste gas is discharged from the liquid discharge groove at the bottom of the cooling condensing pipe bundle and enters the dewatering bag in the dewatering section, the gas enters the heating drying section from the top of the cooling condensing pipe bundle through the dewatering section, the dewatering and draining water of the dewatering bag is drained to the sewage treatment system under the control of the liquid level, the dehumidified waste gas enters the inner spiral heating pipe in the heating drying section, the inner wall of the inner spiral heating pipe adopts the spiral structure to make the gas turbulent in order to improve the heating effect in the inner spiral heating pipe, the hot water is arranged outside the inner spiral heating pipe, the hot water can be steam condensate water or heat medium water, the hot water inlet is arranged at the upper part of the shell, and the hot water outlet is arranged at the lower part, and the dried waste gas after heating is discharged from the heating drying section, the utility model discloses three processes of cooling condensing, dewatering and heating, so that a large amount of water in the decoking waste gas is removed before the decoking waste gas enters the coking heating furnace air duct, the temperature of the waste gas is improved, the water vapor condensation phenomenon is avoided, and therefore the safety and efficiency of the delayed coking heating furnace are improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings required to be used in the embodiments or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0014] Figure 1 The utility model provides a pipeline type decoking waste gas dehumidifying dryer's structure schematic view for the embodiment of the application. DETAILED DESCRIPTION

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The terms "upper," "lower," "front," "rear," "left," and "right," etc., used when describing the installation position or direction of the structure or components in this embodiment are based on the orientation shown in the accompanying drawings. They are merely for convenience of description, used to distinguish the relative positions of various components or directions, and do not represent the orientation of the dehumidifier dryer in this embodiment during use.

[0016] like Figure 1 As shown in the figure, this utility model embodiment provides a pipeline-type desiccant dehumidifier, characterized in that it includes a dehumidifier shell 1, which comprises a cooling and condensing section, a dehydration section, and a heating and drying section. The cooling and condensing section, the dehydration section, and the heating and drying section are connected by connecting flanges 7 and are distributed sequentially on the left, middle, and right sides of the dehumidifier shell 1. In this embodiment, the three functional sections can be installed as a whole or in sections. When installed in sections, the elevation of the dehydration section should be lower than that of the cooling and condensing section.

[0017] The cooling and condensing section is equipped with a cooling and condensing tube bundle 2, and a coalescing and dehydration element 3 is installed inside the cooling and condensing tube bundle 2. A dehydration tank is set at the bottom of the gas outlet of the cooling and condensing tube bundle 2. A baffle plate 5 is set outside the cooling and condensing tube bundle 2. A cold water outlet 9 and a cold water inlet 8 are respectively set on the upper and lower sides of the dehumidifier shell 1 corresponding to the cooling and condensing section.

[0018] A water separator is installed at the bottom of the dewatering section, with a dewatering drain outlet 12 at the bottom of the water separator and a level gauge port 15 on the top of the water separator. A baffle plate 6 is installed behind the airflow direction of the water separator, and a sharp hole is opened at the bottom of the water separator to prevent liquid accumulation behind the baffle plate 6. A thermometer port 13 and a pressure gauge port 14 are installed at the top of the dewatering section. The dewatering drain outlet 12 of the water separator is connected to the sewage treatment system.

[0019] The heating and drying section is equipped with an inner spiral heating tube 4. The inner wall of the inner spiral heating tube 4 adopts a spiral structure. A baffle plate 5 is installed outside the inner spiral heating tube 4. The dehumidifier shell 1 is equipped with a hot water inlet 10 and a hot water outlet 11 on the upper and lower sides corresponding to the heating and drying section.

[0020] like Figure 1As shown, in addition to the de-focusing water-containing waste gas A1 into the cooling condensing pipe bundle 2 of the dehumidifying dryer, in order to improve the cooling condensing effect in the pipe, the coalescence dehydration element 3 is arranged in the cooling condensing pipe bundle 2, so that the condensed water droplets grow up and are well separated from the gas; the outside of the cooling condensing pipe bundle 2 is cooling water, which can be chilled water or fresh water, the cooling water inlet B1 enters from the lower part of the dehumidifying dryer shell 1, and the cooling water outlet B2 is discharged from the upper part thereof, in order to improve the heat exchange effect outside the pipe, the baffle 5 is arranged outside the cooling condensing pipe bundle 2 to improve the flow rate of the cooling water; after the water-containing waste gas exchanges heat with the cooling water, the condensed water in the waste gas is discharged from the liquid removal groove at the bottom of the cooling condensing pipe bundle 2 and enters the dehydration bag of the dehydration section, the gas passes through the dehydration section from the top of the cooling condensing pipe bundle 2 and enters the heating drying section, and the dehydration water D of the dehydration bag is discharged to the sewage treatment system under the control of the liquid level. The dehumidified waste gas enters the inner spiral heating pipe 4 of the heating drying section, in order to improve the heating effect in the inner spiral heating pipe 4, the inner wall of the inner spiral heating pipe 4 adopts a spiral structure to make the gas turbulent; the outside of the inner spiral heating pipe 4 is hot water, which can be steam condensate water or heat medium water, the hot water inlet C1 enters from the upper part of the shell, and the hot water outlet C2 is discharged from the lower part, and the dried waste gas A2 after heating is discharged from the heating drying section.

[0021] The de-focusing waste gas dehumidifying dryer of the embodiment is a pipeline type, and the inlet and outlet can be connected with the connecting flange 7 of the de-focusing waste gas pipeline; the specifications and sizes of the cooling condensing pipe 2 and the coalescence dehydration element 3 inside the same need to be calculated and determined according to the waste gas flow, waste gas composition, waste gas temperature and pressure, dehumidification effect, pressure drop requirement, cooling water condition and the like. The specifications and sizes of the water separation bag should be determined according to the dehumidification and dehydration amount. The specifications and sizes of the inner spiral heating pipe 4 of the heating drying section need to be calculated and determined according to the waste gas flow, waste gas composition, waste gas temperature and pressure, water vapor superheat degree, pressure drop requirement, hot water condition and the like.

[0022] Although the utility model has disclosed as above with preferred embodiments, the above preferred embodiments are not used to limit the utility model, ordinary skilled in the art can make various modifications and modifications without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model is the range defined by claims.

Claims

1. A ducted decoking off-gas dehumidifying dryer characterized by, The application relates to a dehumidifying dryer shell (1) comprising a cooling condensing section, a dewatering section and a heating drying section which are connected by connecting flanges (7); A cooling condensing pipe bundle (2) is arranged in the cooling condensing section, the cooling condensing pipe bundle (2) is provided with coalescence dewatering elements (3), a liquid removal groove is arranged at the bottom of the gas outlet of the cooling condensing pipe bundle (2), baffles (5) are arranged outside the cooling condensing pipe bundle (2), and cold water outlets (9) and cold water inlets (8) are arranged on the upper and lower sides of the corresponding cooling condensing section of the dehumidifying dryer shell (1); A water distribution bag is arranged at the lower part of the dewatering section, a dewatering drainage port (12) is arranged at the bottom of the water distribution bag, a liquid level meter port (15) is arranged on the water distribution bag, a liquid blocking plate (6) is arranged behind the airflow direction of the water distribution bag, sharp holes are arranged at the bottom of the water distribution bag to avoid liquid accumulation behind the liquid blocking plate (6), a thermometer port (13) and a pressure gauge port (14) are arranged at the upper part of the dewatering section; An inner spiral heating pipe (4) is arranged in the heating drying section, baffles (5) are arranged outside the inner spiral heating pipe (4), and hot water inlets (10) and hot water outlets (11) are arranged on the upper and lower sides of the corresponding heating drying section of the dehumidifying dryer shell (1).

2. A ducted decoking off-gas dehumidifying dryer according to claim 1, characterized in that, The dewatering drainage port (12) of the water distribution bag is connected with a sewage treatment system.

3. A ducted decoking off-gas dehumidifying dryer according to claim 1, characterized in that, The inner wall of the inner spiral heating pipe (4) adopts a spiral structure.

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