A device for treating coal chemical shift condensate stripping wastewater

Abstract

The present application relates to a kind of device for treating coal chemical conversion condensate stripping wastewater, including low-temperature conversion condensate main stripping tower;Low-temperature conversion condensate main stripping tower top is connected cooling device, gas-liquid separator in turn, the bottom of gas-liquid separator is connected stripping tower by heater, the stripping tower is connected ammonia water absorption tower, and the top of gas-liquid separator and the top of the stripping tower are all connected to sulfur removal recovery device;Tower plate is provided in ammonia water absorption tower, filter screen is provided in tower plate, and slide rail is vertically provided on the inner wall of ammonia water absorption tower;The bottom of tower plate is respectively provided with ejection block on both sides;Limiting block is provided at the top of slide rail;Shaft is provided in the lower part of tower plate, eccentric wheel is respectively provided at both ends of the shaft, and the eccentric wheel position and the ejection block are matched with setting. Through the setting of ejection assembly and eccentric wheel in ammonia water absorption tower, the residual attachments in tower plate are shaken out, avoid tower plate blockage, guarantee the normal use of ammonia water absorption tower.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of environmental protection, and in particular to a device for treating coal chemical conversion condensate stripping wastewater. BACKGROUND

[0002] In the process of crushed coal pressurized gasification, the crude coal gas at the outlet of the gasification furnace contains a large amount of water vapor and organic by-products such as tar, oil, phenol, fatty acid, soluble gas, inorganic salt, etc., and the temperature is relatively high, so a large amount of water is needed for washing and cooling to reduce the temperature of the crude coal gas and recover heat. In the process of washing and cooling the crude coal gas, the components of the blockage enter the washing water, forming coal gasification wastewater (coal gas water) with complex components in gas, liquid and solid states. At present, during the operation of the coal chemical system, the high concentration of ammonia nitrogen in the condensate liquid causes great operating pressure on the subsequent wastewater treatment, increasing the operating cost of wastewater treatment; in order to achieve energy saving and environmental protection and reduce pollution, most enterprises currently use ammonia absorption towers to recover ammonia in coal chemical wastewater, but the existing tower plates in the ammonia absorption tower are prone to ammonium salt crystallization, which blocks the equipment and pipelines, thereby reducing the operating efficiency of the ammonia absorption tower. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, the present application provides a device for treating coal chemical conversion condensate stripping wastewater.

[0004] The technical scheme adopted by the present application to solve its technical problems is: a device for treating coal chemical conversion condensate stripping wastewater, characterized in that it comprises a low-temperature conversion condensate main stripping tower, a cooler, a gas-liquid separator, a heater, a stripping tower and an ammonia water absorption tower;

[0005] The top end of the low-temperature conversion condensate main stripping tower is connected to the cooler and the gas-liquid separator in turn, the bottom end of the gas-liquid separator is connected to the stripping tower through the heater, the stripping tower is connected to the ammonia water absorption tower, and the top end of the gas-liquid separator and the top end of the stripping tower are both connected to a sulfur removal and recovery device;

[0006] The ammonia water absorption tower is provided with a tower plate, the tower plate is provided with a filter screen, vertical slide rails are provided on the inner wall of the ammonia water absorption tower, the tower plate is arranged on the slide rails on the inner wall of the ammonia water absorption tower at both ends, and the tower plate moves along the slide rails;

[0007] Ejector blocks are arranged on both sides of the bottom end of the tower plate; limit blocks are arranged at the top end of the slide rails;

[0008] A rotating shaft is arranged at the lower part of the tower plate, the rotating shaft is arranged in parallel with the tower plate with a spacing, the rotating shaft is connected to a rotating shaft motor on the outer wall of the ammonia water absorption tower, eccentric wheels are arranged at both ends of the rotating shaft, and the eccentric wheels are arranged in matching positions with the ejector blocks.

[0009] In a preferred embodiment of the present application, the limiting block upper portion is further provided with an ejection assembly, the ejection assembly comprising an ejection plate and an ejection needle arranged on the ejection plate, the ejection plate and the tray plate are arranged in parallel with a spacing, the ejection needle is arranged on the side of the ejection plate facing the tray plate, and the ejection needle is arranged in matching with the filter holes on the filter screen.

[0010] In a preferred embodiment of the present application, the bottom end of the ejection block is outwardly contoured as an arc protruding towards the eccentric wheel direction.

[0011] In a preferred embodiment of the present application, the inner top end of the stripping tower is provided with a stripping separator, the stripping separator comprising a separator shell and a rotating mechanism arranged in the separator shell, the rotating mechanism comprising a rotating motor and a rotating shaft, the rotating motor is arranged on the upper portion of the top cover of the separator shell, one end of the rotating shaft is vertically extended into the separator shell, one end of the rotating shaft is connected with the rotating motor arranged on the upper portion of the top cover, and the outer wall of the rotating shaft is provided with propeller blades; the bottom end of the separator shell is provided with an air inlet, and the top end of the separator shell is provided with an air outlet.

[0012] In a preferred embodiment of the present application, the inner wall of the top cover of the separator shell is a wavy inner top cover, the inner wall of the side wall of the separator shell is a wavy inner wall, and the gas-liquid passage is formed between the wavy inner top cover and the wavy inner wall; the bottom end of the gas-liquid passage is connected with the air inlet, and the top end of the gas-liquid passage is connected with the air outlet.

[0013] In a preferred embodiment of the present application, the rotating shaft is located at the center position of the gas-liquid passage, and the propeller blades are spaced apart from the wavy inner wall of the separator shell; a plurality of triangular pyramid-shaped protrusions are distributed on the propeller blades.

[0014] The present application has the following advantages: through the arrangement of the ejection assembly and the eccentric wheel in the ammonia water absorption tower, the residual adhering substances in the tray are shaken out, the tray is prevented from being blocked, the normal use of the ammonia water absorption tower is ensured, and the operation efficiency of the ammonia water absorption tower is ensured. Through the gas-liquid separator, efficient separation of gas and liquid is achieved, the separation efficiency of gas and liquid is improved, and through the ammonia water absorption tower, effective recovery of ammonia water is achieved, which greatly saves resources and reduces environmental pollution. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the present application;

[0016] Figure 2 is a structural schematic diagram of the stripping separator of the present application;

[0017] Figure 3 is a structural schematic diagram of the propeller blade of the present application;

[0018] Figure 4 is a schematic diagram of the tray structure of the present application;

[0019] Figure 5 is a schematic diagram of the eccentric wheel against the ejection block structure of the present application;

[0020] In the figure: low-temperature shift condensate main stripping tower 100; cooler 200; gas-liquid separator 300; heater 400; stripping tower 500; ammonia water absorption tower 600; tray 601; filter screen 602; sliding rail 603; ejection block 604; the sliding rail 603; limiting block 605; rotating shaft 607; rotating shaft motor 608; eccentric wheel 609; ejection plate 610; ejection needle 611; stripping separator 700; separator shell 701; rotating motor 702; rotating shaft 703; propeller blade 704; air inlet 705; air outlet 706; three-prism-shaped protrusions 707. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and should not be construed as limiting the present application.

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0023] As Figures 1 to 5 shown, a device for treating coal chemical shift condensate stripping wastewater, comprising a low-temperature shift condensate main stripping tower 100, a cooler 200, a gas-liquid separator 300, a heater 400, a stripping tower 500, and an ammonia water absorption tower 600;

[0024] The low-temperature shift condensate main stripping tower 100 is sequentially connected with a cooler 200 and a gas-liquid separator 300 at the top end, the bottom end of the gas-liquid separator 300 is connected with a stripper 500 through a heater 400, the stripper 500 is connected with an ammonia water absorption tower 600, and the top end of the gas-liquid separator 300 and the top end of the stripper 500 are both connected to a desulfurization recovery device;

[0025] The ammonia water absorption tower 600 is provided with a tower plate 601, the tower plate 601 is provided with a filter screen 602, vertical slide rails 603 are arranged on the inner wall of the ammonia water absorption tower, the tower plate 601 is arranged on the slide rails 603 on the inner wall of the ammonia water absorption tower 600 at both ends, and the tower plate 601 moves along the slide rails 603;

[0026] Both sides of the bottom end of the tower plate 601 are provided with ejection blocks 604, and the top end of the slide rail 603 is provided with a limiting block 605;

[0027] The lower part of the tower plate 601 is provided with a rotating shaft 607, the rotating shaft 607 is arranged in parallel with the tower plate 601 and is spaced apart, the rotating shaft 607 is connected with a rotating shaft motor 608 on the outer wall of the ammonia water absorption tower 600, both ends of the rotating shaft 607 are provided with eccentric wheels 609, and the eccentric wheels 609 are arranged in a matched mode with the ejection blocks 604.

[0028] When the ammonia water absorption tower is used for a period of time, the system is started and stopped or the gas volume fluctuates greatly, a small amount of carbon dioxide gas is mixed into the ammonia water absorption tower, reacts with high-concentration ammonia water to generate ammonium bicarbonate crystals, blocks the tower plate, affects the normal operation of the ammonia water absorption tower, and affects the exhaust efficiency of the gas in the ammonia water absorption tower; at this time, the rotating shaft motor 608 can be started, the rotating shaft motor 608 drives the rotating shaft 607 to rotate, and then the rotation of the eccentric wheels 609 on the rotating shaft 607 is realized, the eccentric wheels 609 touch the ejection blocks 604 when rotating to a position, the ejection blocks 604 are ejected upward, since the ejection blocks 604 are arranged on the bottom plate of the tower plate 601, the tower plate 601 drives the filter screen 602 to move upward along the slide rails 603, when the ejection blocks 604 are not supported after the eccentric wheels 609 rotate to a lower position, the tower plate 601 moves downward along the slide rails 603, and the up-and-down vibration of the filter screen 602 is realized, the blockage in the filter screen 602 is shaken out, and the normal use of the tower plate 601 is ensured. The bottom end of the ejection block 604 is in an arc shape protruding to the eccentric wheel direction, so that the matching contact of the ejection block and the eccentric wheel is facilitated.

[0029] The limiting block 605 is further provided with an ejection assembly at the upper portion of the limiting block 605, the ejection assembly comprising an ejection plate 610 and an ejection needle 611 arranged on the ejection plate 610, the ejection plate 610 is arranged in parallel with the tower plate 601 and is spaced apart, the ejection needle 611 is arranged on the ejection plate 610 towards the side of the tower plate 601, and the ejection needle 611 is arranged in matching with the filter holes on the filter screen 602. After the rotating shaft 607 is driven to rotate by the rotating shaft motor 608, the eccentric wheel 609 on the rotating shaft 607 pushes the ejection block 604 upwards, and then pushes the tower plate 601 upwards, in the process of pushing the tower plate 601 upwards, the filter screen 602 on the tower plate 601 moves upwards and contacts with the ejection needle 611, when the eccentric wheel 609 rotates to the highest position, the ejection needle 611 completely extends into the mesh holes of the filter screen 602, and the clogging in the filter holes is ejected; when the tower plate 601 moves downwards without the support of the eccentric wheel, the vibration generated when the tower plate 601 contacts with the bottom end of the slide rail 603 and stops moving drives the vibration of the filter screen, and then the clogging in the filter holes is further shaken out, which effectively avoids the clogging of the filter screen, ensures the normal and effective use of the ammonia water absorption tower, and ensures that the gas can be normally discharged.

[0030] The top end of the stripping tower 500 is provided with a stripping separator 700, the stripping separator 700 comprises a separator shell 701 and a rotating mechanism arranged in the separator shell 701, the rotating mechanism comprises a rotating motor 702 and a rotating shaft 703, the rotating motor 702 is arranged on the upper portion of the top cover of the separator shell 701, one end of the rotating shaft 703 vertically extends into the separator shell 701, one end of the rotating shaft 703 is connected with the rotating motor 702 located on the upper portion of the top cover, and the outer wall of the rotating shaft 703 is provided with a propeller blade 704; the bottom end of the separator shell 701 is provided with an air inlet 705, and the top end of the separator shell 701 is provided with an air outlet 706.

[0031] The pretreated condensate is injected into the low-temperature shift condensate main stripping tower for stripping, the condensate releases carbon dioxide, hydrogen sulfide, ammonia and other gases through desorption, and the condensate is pumped back to the gasification device to wash the raw coal gas, the gas phase after stripping is cooled by a cooler and then enters a gas-liquid separator to realize separation of gas and liquid, the separated gas phase is connected and sent to a sulfur recovery device, the separated waste liquid is heated by a heater and then enters the stripping tower for stripping, ammonia gas collected from the side line of the stripping tower enters the ammonia water absorption tower through temperature control of the stripping tower; carbon dioxide and hydrogen sulfide gas are separated out at the top, and the formed gas phase enters the stripping separator 700, the rotating motor drives the rotating shaft to rotate, the rotating shaft drives the propeller blade arranged on the rotating shaft to rotate, the high-speed rotation of the propeller blade continuously contacts with the waste gas, so that the waste gas collides with the propeller blade, and water and gas are separated, thereby realizing good gas-liquid separation effect.

[0032] As a better implementation, the inner wall of the top cover of the separator shell 701 is a wavy inner top cover, the inner wall of the side wall of the separator shell 701 is a wavy inner wall, and the wavy inner top cover and the wavy inner wall form a gas-liquid passage; the bottom end of the gas-liquid passage is connected to the gas inlet 705, and the top end is connected to the gas outlet 706. That is, the exhaust gas enters the stripping separator from the gas inlet, and after passing through the gas-liquid passage, the exhaust gas is discharged from the gas outlet. During the process of passing through the gas-liquid passage, the inner wall and the inner top cover of the separator shell are wavy, that is, the exhaust gas collides with the wavy inner wall and the inner top cover multiple times during the process of being discharged from the gas-liquid passage to the gas outlet. The contact area between the exhaust gas and the side wall and the inner top cover is increased, the passing time of the exhaust gas is prolonged, and the high-speed rotating propeller blade is combined to realize multiple turning of the exhaust gas, which is beneficial to improving the separation efficiency of the gas-liquid.

[0033] More preferably, the rotating shaft in the application is located at the center position of the gas-liquid passage, and the propeller blade is spaced apart from the wavy inner wall of the separator shell 701, which facilitates the normal rotation of the propeller blade driven by the rotating shaft. As another preferred embodiment, a plurality of triangular pyramid-shaped protrusions 707 are distributed on the propeller blade. The triangular pyramid-shaped protrusions 707 on the propeller blade make multiple cone surfaces and exhaust gas collide and contact during the rotation of the propeller blade, increase the stirring speed of the exhaust gas, and improve the gas-liquid separation speed and separation effect of the exhaust gas.

[0034] The present application realizes efficient separation of gas-liquid through the gas-liquid separator, improves the separation efficiency of gas-liquid, and realizes effective recovery of ammonia water through the ammonia water absorption tower, greatly saving resources and reducing environmental pollution. Through the setting of the top-out assembly and the eccentric wheel in the ammonia water absorption tower, the residual attachments in the tray are shaken out, the tray is prevented from being blocked, and the normal use of the ammonia water absorption tower is ensured.

[0035] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] In summary, although the present application has been disclosed as above with preferred embodiments, the above preferred embodiments are not intended to limit the present application, and those skilled in the art can make various modifications and decorations without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application is subject to the scope defined by the claims.

Claims

1. A device for treating coal chemical conversion condensate stripping wastewater, characterized in that: It includes a low-temperature shift condensate main stripping tower, a cooler, a gas-liquid separator, a heater, a stripping tower and an ammonia absorption tower; The top of the low-temperature shift condensate main stripping tower is connected to a cooler and a gas-liquid separator in sequence, the bottom of the gas-liquid separator is connected to a stripping tower via a heater, the stripping tower is connected to an ammonia absorption tower, and the tops of the gas-liquid separator and the stripping tower are both connected to a desulfurization recovery device; The ammonia absorption tower is provided with a tower plate, a filter screen is provided in the tower plate, a slide rail is vertically provided on the inner wall of the ammonia absorption tower, both ends of the tower plate are arranged on the slide rail on the inner wall of the ammonia absorption tower, and the tower plate moves along the slide rail; Both sides of the bottom end of the tower plate are provided with ejection blocks respectively; the top end of the slide rail is provided with a limit block; A rotating shaft is provided at the lower part of the tower plate, and the rotating shaft is arranged parallel to the tower plate with a gap therebetween. The rotating shaft is connected to the rotating shaft motor on the outer wall of the ammonia absorption tower. Eccentric wheels are provided at both ends of the rotating shaft, and the positions of the eccentric wheels match the ejection blocks. A stripping separator is provided at the top of the stripping tower, and the stripping separator includes a separator shell and a rotating mechanism disposed in the separator shell, the rotating mechanism including a rotating motor and a rotating shaft, the rotating motor being disposed on the upper portion of the separator shell top cover, one end of the rotating shaft vertically extending into the separator shell, and the other end being connected to the rotating motor located on the upper portion of the top cover, and propeller blades being provided on the outer wall of the rotating shaft; an air inlet is provided at the bottom end of the separator shell, and an air outlet is provided at the top end of the separator shell; The inner wall of the top cover of the separator housing is a wavy inner top cover, and the inner wall of the side wall of the separator housing is a wavy inner wall. A gas-liquid channel is formed between the wavy inner top cover and the wavy inner wall; the bottom end of the gas-liquid channel is connected to the air inlet, and the top end is connected to the air outlet; The rotating shaft is located at the center of the gas-liquid channel, and a distance is left between the propeller blade and the wavy inner wall of the separator housing; a plurality of triangular pyramidal protrusions are distributed on the propeller blade; An ejection assembly is also provided at the upper part of the limit block, and the ejection assembly includes an ejection plate and an ejection pin arranged on the ejection plate. The ejection plate and the tower plate are arranged parallel to each other with a spacing therebetween. The ejection pin is arranged on the side of the ejection plate facing the tower plate, and the ejection pin is matched with the filter hole on the filter screen.

2. The device for treating coal chemical conversion condensate stripping wastewater according to claim 1, characterized in that: The outer contour of the bottom end of the ejector block is an arc shape convex toward the eccentric wheel.

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