Ammonia tail gas treatment device

Abstract

An embodiment of the utility model provides an ammonia tail gas treatment device, which relates to the technical field of tail gas treatment and comprises a tail gas absorption tower, the lower end of the tail gas absorption tower is connected with an ammonia water tank through a pipeline, a tail gas tank is mounted at the upper end of the ammonia water tank, and the top of the tail gas tank is connected with a tail gas fan through a pipeline. The output end of the tail gas fan is connected with the washing tower, liquid at the bottom of the washing tower is conveyed into the washing tank through a pipeline and a second conveying pump for secondary absorption, and an adsorption tank is mounted at the top of the washing tank, so that the problem that the ammonia-containing tail gas is discharged into the atmosphere in the production process and seriously pollutes the environment is solved; by adopting the designed tail gas absorption device, the tail gas becomes ammonia water after being fully absorbed, and the ammonia water can be returned to a chemical production system to be reused as a raw material, so that the cost is saved, the ammonia-containing tail gas subjected to absorption treatment reaches the emission standard, and the device has the advantages of low treatment cost, safety, environmental protection, higher economic value, great reduction of the production cost and improvement of the economic benefit.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to an ammonia tail gas treatment device. Background Art

[0002] Vinyl pyrrolidone is a colorless liquid that readily polymerizes. It is prepared by reacting γ-butyrolactone with liquid ammonia to form α-pyrrolidone, which is then further prepared by reacting α-pyrrolidone with acetylene gas. It is primarily used in the production of polyvinyl pyrrolidone (PVP) and tertiary pyrrolidone, both plasma substitutes. It is also used as a dispersant, dyeing auxiliary, and paint additive in the papermaking industry, as well as in the production of adhesives and color films. It is a general-purpose reagent.

[0003] Vinyl pyrrolidone is produced through a two-step reaction of liquid ammonia, acetylene, and γ-butyrolactone. The resulting liquid ammonia produces a large amount of ammonia-containing tail gas. The indiscriminate release of ammonia-containing tail gas into the atmosphere during production severely pollutes the environment and contributes to a significant amount of factory waste gas. Existing ammonia treatment equipment typically uses incineration, which typically requires complex process flows for ammonia recovery, resulting in high costs, low processing efficiency, and the potential for secondary pollution. Utility Model Content

[0004] The purpose of the utility model is to provide an ammonia tail gas treatment device, which can solve the problem that existing ammonia treatment devices usually adopt an incineration method and usually require a complex process flow to recover ammonia.

[0005] The utility model provides a device for treating ammonia tail gas, comprising:

[0006] The tail gas absorption tower has its lower end connected to the ammonia tank through a pipeline, the upper end of the ammonia tank is equipped with a tail gas tank, the top of the tail gas tank is connected to the tail gas fan through a pipeline, the output end of the tail gas fan is connected to the washing tower, the bottom liquid of the washing tower is transported to the inside of the washing tank through a pipeline and a second delivery pump for secondary absorption, and an adsorption tank is installed on the top of the washing tank.

[0007] Preferably, the tail gas absorption tower, the washing tower and the adsorption tank are all supplied with water by external spraying from an external water supply part.

[0008] Preferably, the bottom of the washing tank is connected to the sewage pool through a pipeline, and is transported by a third delivery pump.

[0009] Preferably, the upper end of the tail gas absorption tower is connected to the ammonia-containing tail gas conveying part, and a chilled water system is also arranged at the upper end of the tail gas absorption tower.

[0010] Preferably, the bottom of the adsorption tank is connected to the filter box through a delivery pipe, and a return pipe is installed on one side of the filter box.

[0011] Preferably, an adsorption part is provided inside the adsorption tank, a spray rack is arranged on the upper end of the adsorption part, and the spray rack is connected to an external water supply part.

[0012] Preferably, a filter plate and a cleaning portion arranged on the upper end of the filter plate are provided inside the filter box, and the cleaning portion is installed in contact with the filter plate.

[0013] Preferably, ash storage troughs are fixedly mounted on both sides of the filter plate, and the ash storage troughs are mounted in close contact with the filter plate.

[0014] Preferably, the cleaning part includes a movable frame and an elastic scraper arranged at the lower end of the movable frame, the side of the elastic scraper is inclined, and a reciprocating screw is inserted through the upper end of the movable frame. The reciprocating screw is matched with the movable frame for transmission, and the two ends of the reciprocating screw are supported by bearings, and the ends are connected to the output end of the driving device.

[0015] Preferably, a diverter plate is mounted on the inner upper end of the filter box by screws, and a reflux pump is provided at the lower end of the filter box, and the reflux pump is connected to the reflux pipe.

[0016] The embodiment of the present invention provides a device for treating ammonia tail gas, wherein the tail gas from the ammonia tail gas conveying part is discharged to the tail gas absorption tower for washing and absorption, the liquid at the bottom of the tower enters the ammonia water tank for secondary absorption through the first delivery pump, and -% ammonia solution is extracted from the bottom of the ammonia water tank through the product pump for product presentation, the tail gas not absorbed by the top of the ammonia water tank enters the tail gas tank for collection, and is sent to the washing tower for washing and absorption through the tail gas blower, and the excess tail gas can be sent to the incineration device for incineration, and the liquid at the bottom of the washing tower is sent to the washing tank for secondary absorption through the second delivery pump, and the gas not absorbed by the washing tank is adsorbed by the adsorption tank, so as to solve the problem that the ammonia tail gas in the production process is discharged into the atmosphere indiscriminately and seriously pollutes the environment. The tail gas absorption device designed is used, and after full absorption, it becomes ammonia water, which can be returned to the chemical production system for reuse as raw material, saving costs. The ammonia tail gas after absorption and treatment meets the emission standards, has low treatment cost, and is safe, environmentally friendly, has high economic value, greatly reduces production costs, and improves economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1This is a schematic diagram of the overall process structure of an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the installation structure of the adsorption tank according to an embodiment of the present utility model.

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the adsorption tank according to an embodiment of the present utility model.

[0021] Figure 4 This is a schematic diagram of the internal structure of the filter box according to an embodiment of the present utility model.

[0022] Figure 5 This is a schematic diagram of the filter plate structure of an embodiment of the present utility model.

[0023] Figure 6 This is a schematic structural diagram of the cleaning part of an embodiment of the present utility model.

[0024] Icons: 100, tail gas absorption tower; 110, ammonia-containing tail gas conveying section; 120, chilled water system; 200, ammonia water tank; 300, tail gas tank; 400, tail gas fan; 410, incineration device; 500, washing tower; 600, washing tank; 700, adsorption tank; 710, conveying pipe; 720, filter box; 721, diverter plate; 730, return pipe; 731, return pump; 740, spray rack; 750, adsorption section; 760, filter plate; 761, ash storage tank; 770, cleaning section; 771, movable rack; 772, elastic scraper; 773, reciprocating screw; 774, limit rod; 800, sewage tank; 900, external water supply section. DETAILED DESCRIPTION

[0025] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0026] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0028] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0029] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0030] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of a construction cost progress management device of the present invention in conjunction with the accompanying drawings.

[0031] like Figures 1-6 As shown, an embodiment of the present invention provides an ammonia tail gas treatment device, including a tail gas absorption tower 100, the lower end of the tail gas absorption tower 100 is connected to the ammonia water tank 200 through a pipeline, the bottom liquid of the tail gas absorption tower 100 is sent into the ammonia water tank 200 for secondary recovery through a first delivery pump, and the upper end of the ammonia water tank 200 is equipped with a tail gas tank 300 for collecting the tail gas from the top of the ammonia water tank 200, the top of the tail gas tank 300 is connected to the tail gas fan 400 for transporting the tail gas through a pipeline, the output end of the tail gas fan 400 is connected to the washing tower 500 for washing and recycling the tail gas, the bottom liquid of the washing tower 500 is transported to the inside of the washing tank 600 through a pipeline and a second delivery pump for secondary absorption, and the top of the washing tank 600 is equipped with an adsorption tank 700 for re-adsorbing the gas inside the washing tank 600, and after the adsorption tank 700 adsorbs the gas, the top gas is led to a safe position for discharge.

[0032] The tail gas from the ammonia tail gas delivery section 110 is discharged to the tail gas absorption tower 100 for washing and absorption. The liquid at the bottom of the tower enters the ammonia water tank 200 for secondary absorption through the first delivery pump. The 10-30% ammonia solution is extracted from the bottom of the ammonia water tank 200 by the product pump for product presentation. The tail gas that is not absorbed at the top of the ammonia water tank 200 enters the tail gas tank 300 for collection and is sent to the washing tower 500 for washing and absorption through the tail gas blower 400. The excess tail gas can be sent to the incineration device 410 for incineration. The liquid at the bottom of the washing tower 500 is sent to the second delivery pump. The gas is pumped to the washing tank 600 for secondary absorption, and the unabsorbed gas in the washing tank 600 is adsorbed by the adsorption tank 700, so as to solve the problem of the ammonia-containing tail gas being discharged into the atmosphere during the production process, which seriously pollutes the environment. The tail gas absorption device is designed, and after full absorption, it is turned into ammonia water, which can be returned to the chemical production system as a raw material for reuse, saving costs. The ammonia-containing tail gas after absorption and treatment meets the emission standards, has low processing cost, and is safe, environmentally friendly, and has high economic value, greatly reducing production costs and improving economic benefits.

[0033] The tail gas absorption tower 100, the washing tower 500 and the adsorption tank 700 are all supplied with external spray water from the external water supply part 900, which is used to spray the inner cavity to prevent the temperature of the tail gas absorption tower 100, the washing tower 500 and the adsorption tank 700 from being too high, causing high temperature spontaneous combustion of the inner cavity.

[0034] The bottom of the washing tank 600 is connected to the sewage pool 800 through a pipeline, and is transported by a third delivery pump to discharge the sewage at the bottom of the washing tank 600, so as to facilitate the collection of the sewage.

[0035] The upper end of the tail gas absorption tower 100 is connected to the ammonia-containing tail gas conveying part 110 for feeding. The upper end of the tail gas absorption tower 100 is also arranged with a chilled water system 120 for heat exchange of the internal equipment of the tail gas absorption tower 100. The low-temperature chilled water of the chilled water system 120 is used for cooling between towers to ensure the normal use of the tail gas absorption tower 100.

[0036] The bottom of the adsorption tank 700 is connected to the filter box 720 through a delivery pipe 710. A reflux pipe 730 is installed on one side of the filter box 720 for transporting and reversing the liquid for recycling. The interior of the adsorption tank 700 is provided with an adsorption part 750 for secondary adsorption of the gas. The upper end of the adsorption part 750 is provided with a spray rack 740 for spraying, cooling and backwashing the adsorption tank 700. The spray rack 740 is connected to the external water supply part 900.

[0037] When the external water supply part 900 sprays water inside the spray rack 740, the temperature is lowered and the internal adsorption part 750 is backwashed and cleaned. The filter box 720 filters and recovers the liquid at the bottom of the adsorption tank 700, and then returns it for water spraying, saving costs and ensuring the cleanliness of the spray water.

[0038] The interior of the filter box 720 is provided with a filter plate 760 for recovering and filtering the spray liquid and a cleaning part 770 arranged at the upper end of the filter plate 760 for cleaning and recovering the filter plate 760. The cleaning part 770 is installed in contact with the filter plate 760. After the liquid enters the filter box 720 for filtration, the dust remains on the upper end of the filter plate 760, which facilitates the filtration of the liquid, keeps it clean, and avoids clogging of the pipeline.

[0039] The cleaning section 770 includes a movable frame 771 for transmission and fixation and an elastic scraper 772 arranged at the lower end of the movable frame 771 for fixedly scraping and cleaning the filter plate 760. The side of the elastic scraper 772 is inclined and is made of elastic silicone material to avoid scratching the filter plate 760. The upper end of the movable frame 771 is penetrated by a reciprocating screw 773 for driving the movable frame 771 to move. The reciprocating screw 773 is matched with the movable frame 771 for transmission. The two ends of the reciprocating screw 773 are supported by bearings, and the ends are connected to the output end of the driving device. The two sides of the movable frame 771 are supported and limited by limit rods 774. When in use, the driving device drives the reciprocating screw 773 to rotate, thereby driving the movable frame 771 to move back and forth, scraping the dust at the upper end to both sides to avoid clogging of the filter plate 760.

[0040] Ash storage troughs 761 for temporarily storing dust on the upper end of the filter plate 760 are fixedly installed on both sides of the filter plate 760. The sides of the ash storage troughs 761 are inclined to collect dust.

[0041] A diverter plate 721 is installed at the upper end of the interior of the filter box 720 by screws. A plurality of holes are evenly opened on the upper end of the diverter plate 721 for diverting the liquid and distributing the liquid evenly. A reflux pump 731 for returning the liquid is provided at the lower end of the filter box 720. The reflux pump 731 is connected to the reflux pipe 730.

[0042] The working principle of an ammonia tail gas treatment device is as follows: the tail gas from the ammonia tail gas conveying part 110 is discharged to the tail gas absorption tower 100 for washing and absorption, the liquid at the bottom of the tower is then fed into the ammonia water tank 200 through the first delivery pump for secondary absorption, 10-30% ammonia solution is extracted from the bottom of the ammonia water tank 200 through the product pump for product presentation, the tail gas not absorbed from the top of the ammonia water tank 200 is collected in the tail gas tank 300, and is sent to the washing tower 500 for washing and absorption through the tail gas blower 400, and the excess tail gas can be sent to the incineration device 410 for incineration, and the washing tower 500 The bottom liquid is delivered to the washing tank 600 for secondary absorption through the second delivery pump, and the gas not absorbed in the washing tank 600 is adsorbed by the adsorption tank 700, so as to solve the problem of the indiscriminate discharge of ammonia-containing tail gas into the atmosphere during the production process, which seriously pollutes the environment. The tail gas absorption device is designed, and after full absorption, it becomes ammonia water, which can be returned to the chemical production system for reuse as raw material, saving costs. The ammonia-containing tail gas after absorption and treatment meets the emission standards, has low processing cost, and is safe, environmentally friendly, and has high economic value, greatly reducing production costs and improving economic benefits.

[0043] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A device for treating ammonia tail gas, characterized in that: include: The tail gas absorption tower has its lower end connected to the ammonia tank through a pipeline, the upper end of the ammonia tank is equipped with a tail gas tank, the top of the tail gas tank is connected to the tail gas fan through a pipeline, the output end of the tail gas fan is connected to the washing tower, the bottom liquid of the washing tower is transported to the inside of the washing tank through a pipeline and a second delivery pump for secondary absorption, and an adsorption tank is installed on the top of the washing tank.

2. The ammonia tail gas treatment device according to claim 1, characterized in that: The tail gas absorption tower, the washing tower and the adsorption tank are all supplied with water by external spraying from an external water supply part.

3. The ammonia tail gas treatment device according to claim 2, characterized in that: The bottom of the washing tank is connected to the sewage pool through a pipeline and is transported by a third delivery pump.

4. The ammonia tail gas treatment device according to claim 3, characterized in that: The upper end of the tail gas absorption tower is connected to the ammonia-containing tail gas conveying part, and a chilled water system is also arranged at the upper end of the tail gas absorption tower.

5. The ammonia tail gas treatment device according to claim 4, characterized in that: The bottom of the adsorption tank is connected to the filter box through a delivery pipe, and a return pipe is installed on one side of the filter box.

6. The ammonia tail gas treatment device according to claim 5, characterized in that: An adsorption part is provided inside the adsorption tank, a spray rack is arranged on the upper end of the adsorption part, and the spray rack is connected to an external water supply part.

7. The ammonia tail gas treatment device according to claim 6, characterized in that: The filter box is provided with a filter plate and a cleaning portion arranged on the upper end of the filter plate, and the cleaning portion is installed in contact with the filter plate.

8. The ammonia tail gas treatment device according to claim 7, characterized in that: Ash storage troughs are fixedly mounted on both sides of the filter plate, and the ash storage troughs are mounted in close contact with the filter plate.

9. The ammonia tail gas treatment device according to claim 8, characterized in that: The cleaning part includes a movable frame and an elastic scraper arranged at the lower end of the movable frame. The side of the elastic scraper is inclined. A reciprocating screw is inserted through the upper end of the movable frame. The reciprocating screw is matched with the movable frame for transmission. The two ends of the reciprocating screw are supported by bearings, and the ends are connected to the output end of the driving device.

10. The ammonia tail gas treatment device according to claim 9, characterized in that: A diverter plate is mounted on the upper inner end of the filter box via screws, and a reflux pump is provided at the lower end of the filter box, and the reflux pump is connected to a reflux pipe.

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