Deslagging system for glycerol distillation residues

Abstract

The utility model provides a residue discharge system for glycerin distillation residues. The residue discharge system comprises a stripping kettle, a residue storage tank, a first vacuum pipeline, a first vacuum valve, a bottom blowing steam pipeline, a bottom blowing steam valve, a residue discharge steam pipeline, a residue discharge steam valve, a first residue discharge pipeline and a first residue discharge valve, the method comprises the following steps: firstly closing a first vacuum valve, then blowing high-pressure steam into a stripping kettle through a bottom blowing steam pipeline, loosening bottom residues, and then closing a bottom blowing steam valve; opening a residue discharge steam valve and a first residue discharge valve, extruding residues in the stripping kettle out of the stripping kettle by utilizing the pressure of high-pressure steam, and discharging the residues into a residue storage tank through a first residue discharge pipeline; after residue discharging is finished, high-pressure steam continues to be blown in for purging, residual materials in the pipeline are purged cleanly, and then the residue discharging steam valve and the first residue discharging valve are closed; glycerin residues in the stripping kettle can be quickly and efficiently discharged, meanwhile, pipeline purging is considered, the residue discharging efficiency is improved, and the pipeline is prevented from being blocked by the residues.

Description

Technical Field

[0001] The utility model relates to the technical field of glycerin distillation system equipment, in particular to a slag discharge system for glycerin distillation residue. Background Art

[0002] In the glycerin distillation production process, as the finished glycerin is continuously evaporated, the glycerin content at the bottom of the distillation tower becomes lower and lower, and it is necessary to discharge the tower bottom residue to replenish new raw materials. Then the discharged residue needs to be further stripped in the stripping kettle. The residue after stripping has high viscosity and high freezing point. It is very easy to damage the pump body and block the pipeline during the slag discharge process. Utility Model Content

[0003] The utility model aims to provide a slag discharge system for glycerol distillation residue.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0005] A slag discharge system for glycerol distillation residue, the slag discharge system comprising a stripping kettle, a residue storage tank, a vacuum pump, a first vacuum pipeline, a first vacuum valve, a bottom blowing steam pipeline, a bottom blowing steam valve, a slag discharge steam pipeline, a slag discharge steam valve, a first slag discharge pipeline and a first slag discharge valve;

[0006] The air inlet of the first vacuum pipeline is connected to the air outlet at the top of the stripping kettle, the air outlet of the first vacuum pipeline is connected to the air inlet of the vacuum pump, and the first vacuum pipeline is provided with a first vacuum valve;

[0007] The gas outlet of the bottom blowing steam pipeline is communicated with the bottom opening of the stripping kettle, and a bottom blowing steam valve is provided on the bottom blowing steam pipeline, so as to blow pressurized steam into the stripping kettle through the bottom blowing steam pipeline and the bottom blowing steam valve, and then use the pressurized steam to loosen and stir the residue in the stripping kettle;

[0008] The gas outlet of the slag discharge steam pipeline is connected with the upper gas inlet of the stripping kettle, and the upper gas inlet of the stripping kettle is located above the top liquid surface of the residue in the stripping kettle. The slag discharge steam pipeline is provided with a slag discharge steam valve, so as to blow pressurized steam into the stripping kettle through the slag discharge steam pipeline and the slag discharge steam valve, and then use the pressure of the pressurized steam to squeeze the residue in the stripping kettle out of the stripping kettle;

[0009] The inlet of the first slag discharge pipe is communicated with the bottom opening of the stripping kettle, the outlet of the first slag discharge pipe is communicated with the top slag inlet of the residue storage tank, and the first slag discharge pipe is provided with a first slag discharge valve.

[0010] Preferably, the slag discharge system further comprises a second vacuum pipe, a second vacuum valve, a second slag discharge pipe, a second slag discharge valve, an intermediate closed slag tank, a slag discharge pump and a third slag discharge valve;

[0011] The inlet of the second slag discharge pipe is communicated with the bottom opening of the stripping kettle, the outlet of the second slag discharge pipe is communicated with the top slag inlet of the intermediate closed slag tank, and a second slag discharge valve is provided on the second slag discharge pipe;

[0012] The air inlet of the second vacuum pipeline is connected to the top air outlet of the middle sealed slag pot, the air outlet of the second vacuum pipeline is connected to the air inlet of the vacuum pump, and the second vacuum pipeline is provided with a second vacuum valve;

[0013] The slag inlet of the slag discharge pump is connected with the bottom slag outlet of the intermediate closed slag tank through a pipeline, and the slag outlet of the slag discharge pump is connected with the top slag inlet of the residual slag storage tank through a pipeline. A third slag discharge valve is arranged on the pipeline connecting the slag inlet of the slag discharge pump and the bottom slag outlet of the intermediate closed slag tank.

[0014] Preferably, the first vacuum valve, the bottom blowing steam valve, the slag discharge steam valve, the first slag discharge valve, the second vacuum valve, the second slag discharge valve and the third slag discharge valve are all normally closed valves.

[0015] The present application has achieved the following beneficial technical effects:

[0016] The operating method of the slag discharge system of the present application is as follows: (1). When the stripping kettle needs to discharge residue, first close the first vacuum valve on the first vacuum pipe, then blow pressurized steam into the stripping kettle through the bottom blowing steam pipe, use the pressurized steam to loosen the bottom residue in the stripping kettle, and then close the bottom blowing steam valve; (2). Open the slag discharge steam valve and the first slag discharge valve, use the slag discharge steam pipe and the slag discharge steam valve to blow high-pressure steam into the stripping kettle to use the pressure of the high-pressure steam to squeeze the residue in the stripping kettle out of the stripping kettle, and discharge it into the residue storage tank through the first slag discharge pipe; after the residue is discharged, use the slag discharge steam pipe and the slag discharge steam valve to continue blowing high-pressure steam into the stripping kettle for a period of time to clean the residual material in the pipe, and then close the slag discharge steam valve and the first slag discharge valve, thereby completing the slag discharge operation;

[0017] The present application can quickly and efficiently discharge the polymerized glycerol residue in the stripping kettle, while taking into account pipeline purging, effectively preventing the original residue from condensing and clogging the pipeline. At the same time, the present application reduces the use of a process pump and utilizes the steam produced by the production system, which is in line with the low-carbon concept of energy conservation and emission reduction, improves the slag discharge efficiency, avoids residue clogging the pipeline, and reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the working principle of a slag discharge system for glycerol distillation residue provided in an embodiment of the utility model;

[0019] In the figure: 1 stripping kettle, 2 residue storage tank;

[0020] 301 a first vacuum pipeline, 302 a first vacuum valve;

[0021] 401 bottom blowing steam pipeline, 402 bottom blowing steam valve;

[0022] 501 slag discharge steam pipeline, 502 slag discharge steam valve;

[0023] 601 first slag discharge pipe, 602 first slag discharge valve;

[0024] 701 a second vacuum pipeline, 702 a second vacuum valve;

[0025] 801 second slag discharge pipe, 802 second slag discharge valve;

[0026] 9 vacuum pump, 10 intermediate sealed slag tank, 11 slag discharge pump, 1101 third slag discharge valve. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "center", "axial", "radial", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0029] Reference Figure 1In the figure: stripping kettle 1, residue storage tank 2; first vacuum pipeline 301, first vacuum valve 302; bottom blowing steam pipeline 401, bottom blowing steam valve 402; slag discharge steam pipeline 501, slag discharge steam valve 502; first slag discharge pipeline 601, first slag discharge valve 602; second vacuum pipeline 701, second vacuum valve 702; second slag discharge pipeline 801, second slag discharge valve 802; vacuum pump 9, intermediate closed slag tank 10, slag discharge pump 11, third slag discharge valve 1101.

[0030] The present application provides a slag discharge system for glycerol distillation residue, the slag discharge system comprising a stripping kettle 1, a residue storage tank 2, a vacuum pump 9, a first vacuum pipeline 301, a first vacuum valve 302, a bottom blowing steam pipeline 401, a bottom blowing steam valve 402, a slag discharge steam pipeline 501, a slag discharge steam valve 502, a first slag discharge pipeline 601 and a first slag discharge valve 602;

[0031] The air inlet of the first vacuum pipeline 301 is connected to the air outlet at the top of the stripping reactor 1, the air outlet of the first vacuum pipeline 301 is connected to the air inlet of the vacuum pump 9, and the first vacuum pipeline 301 is provided with a first vacuum valve 302;

[0032] The gas outlet of the bottom blowing steam pipeline 401 is communicated with the bottom opening of the stripping kettle 1, and a bottom blowing steam valve 402 is provided on the bottom blowing steam pipeline 401, so as to blow pressurized steam into the stripping kettle 1 through the bottom blowing steam pipeline 401 and the bottom blowing steam valve 402, and then use the pressurized steam to loosen and stir the residue in the stripping kettle 1;

[0033] The gas outlet of the slag discharge steam pipeline 501 is communicated with the upper gas inlet of the stripping kettle 1, and the upper gas inlet of the stripping kettle 1 is located above the top liquid surface of the residue in the stripping kettle 1. The slag discharge steam pipeline 501 is provided with a slag discharge steam valve 502, so as to blow pressurized steam into the stripping kettle 1 through the slag discharge steam pipeline 501 and the slag discharge steam valve 502, and then use the pressure of the pressurized steam to squeeze the residue in the stripping kettle 1 out of the stripping kettle 1;

[0034] The inlet of the first slag discharge pipe 601 is connected to the bottom opening of the stripping kettle 1 , the outlet of the first slag discharge pipe 601 is connected to the top slag inlet of the residue storage tank 2 , and the first slag discharge pipe 601 is provided with a first slag discharge valve 602 .

[0035] In the above embodiment, the present application provides a slag discharge pipeline for a slag discharge system for glycerol distillation residue. In actual production, slag discharge difficulties and slag discharge failures may occur unpredictably and inevitably. The above-mentioned single slag discharge pipeline is definitely not enough, and a spare or additional slag discharge pipeline is required. For this reason, in one embodiment of the present application, the slag discharge system further includes a second vacuum pipeline 701, a second vacuum valve 702, a second slag discharge pipeline 801, a second slag discharge valve 802, an intermediate closed slag tank 10, a slag discharge pump 11 and a third slag discharge valve 1101;

[0036] The inlet of the second slag discharge pipe 801 is connected to the bottom opening of the stripping kettle 1, the outlet of the second slag discharge pipe 801 is connected to the top slag inlet of the intermediate closed slag pot 10, and the second slag discharge pipe 801 is provided with a second slag discharge valve 802;

[0037] The air inlet of the second vacuum pipe 701 is communicated with the air outlet at the top of the middle sealed slag pot 10, the air outlet of the second vacuum pipe 701 is communicated with the air inlet of the vacuum pump 9, and the second vacuum pipe 701 is provided with a second vacuum valve 702, so as to evacuate the inner cavity of the middle sealed slag pot 10 through the second vacuum pipe 701, the second vacuum valve 702 and the vacuum pump 9;

[0038] The slag inlet of the slag discharge pump 11 is connected to the bottom slag outlet of the intermediate closed slag tank 10 through a pipeline, and the slag outlet of the slag discharge pump 11 is connected to the top slag inlet of the residual slag storage tank 2 through a pipeline, and a third slag discharge valve 1101 is provided on the pipeline connecting the slag inlet of the slag discharge pump 11 and the bottom slag outlet of the intermediate closed slag tank 10;

[0039] Here, a second spare slag discharge pipeline is formed, and when the slag discharge pipeline in the above embodiment is difficult to discharge slag or fails, the second slag discharge pipeline is activated:

[0040] When the stripping kettle 1 needs to discharge residue, the first vacuum valve 302 on the first vacuum pipeline 301 is closed first;

[0041] Then, pressurized steam is blown into the stripping kettle 1 through the bottom blowing steam pipeline 401, and the bottom residue in the stripping kettle 1 is loosened and stirred by the pressurized steam, and then the bottom blowing steam valve 402 is closed;

[0042] Then, the slag discharge steam valve 502, the second vacuum valve 702 and the second slag discharge valve 802 are opened, and high-pressure steam is blown into the stripping kettle 1 through the slag discharge steam pipeline 501 and the slag discharge steam valve 502 to squeeze the residue in the stripping kettle 1 out of the stripping kettle 1 by the pressure of the high-pressure steam, and at the same time, the middle closed slag tank 10 is evacuated into a vacuum state through the vacuum pump 9, the second vacuum pipeline 701 and the second vacuum valve 702, so that the slag is pressed downward by the pressurized steam above and sucked downward by the vacuum negative pressure below, and the upper pressure and the lower suction are combined to discharge the residue in the stripping kettle 1 into the middle closed slag tank 10 more smoothly;

[0043] When most of the residue in the stripping kettle 1 is discharged into the middle closed slag tank 10, the second vacuum valve 702 is closed, and then the slag discharge steam pipeline 501 and the slag discharge steam valve 502 are used to continue blowing high-pressure steam into the stripping kettle 1 for a period of time to clean the residual material in the pipeline, and then the slag discharge steam valve 502 and the second slag discharge valve 802 are closed, and the slag discharge operation is completed;

[0044] Then, when the slag in the intermediate closed slag pot 10 accumulates to a certain amount, the slag in the intermediate closed slag pot 10 is extracted and discharged into the residue storage tank 2 through the slag discharge pump 11 and the third slag discharge valve 1101 .

[0045] In one embodiment of the present application, the first vacuum valve 302, the bottom blowing steam valve 402, the slag discharge steam valve 502, the first slag discharge valve 602, the second vacuum valve 702, the second slag discharge valve 802 and the third slag discharge valve 1101 are all normally closed valves.

[0046] The methods and devices not described in detail in the present invention are all prior art and will not be described in detail.

[0047] The principles and implementation methods of the present invention are described in this article using specific embodiments. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A slag discharge system for glycerol distillation residue, characterized in that: The deslagging system comprises a stripping kettle, a residue storage tank, a vacuum pump, a first vacuum pipeline, a first vacuum valve, a bottom blowing steam pipeline, a bottom blowing steam valve, a deslagging steam pipeline, a deslagging steam valve, a first deslagging pipeline and a first deslagging valve; The air inlet of the first vacuum pipeline is connected to the air outlet at the top of the stripping kettle, the air outlet of the first vacuum pipeline is connected to the air inlet of the vacuum pump, and the first vacuum pipeline is provided with a first vacuum valve; The gas outlet of the bottom blowing steam pipeline is communicated with the bottom opening of the stripping kettle, and a bottom blowing steam valve is provided on the bottom blowing steam pipeline, so as to blow pressurized steam into the stripping kettle through the bottom blowing steam pipeline and the bottom blowing steam valve, and then use the pressurized steam to loosen and stir the residue in the stripping kettle; The gas outlet of the slag discharge steam pipeline is connected with the upper gas inlet of the stripping kettle, and the upper gas inlet of the stripping kettle is located above the top liquid surface of the residue in the stripping kettle. The slag discharge steam pipeline is provided with a slag discharge steam valve, so as to blow pressurized steam into the stripping kettle through the slag discharge steam pipeline and the slag discharge steam valve, and then use the pressure of the pressurized steam to squeeze the residue in the stripping kettle out of the stripping kettle; The inlet of the first slag discharge pipe is communicated with the bottom opening of the stripping kettle, the outlet of the first slag discharge pipe is communicated with the top slag inlet of the residue storage tank, and the first slag discharge pipe is provided with a first slag discharge valve.

2. A slag discharge system for glycerol distillation residue according to claim 1, characterized in that: The slag discharge system also includes a second vacuum pipe, a second vacuum valve, a second slag discharge pipe, a second slag discharge valve, an intermediate closed slag tank, a slag discharge pump and a third slag discharge valve; The inlet of the second slag discharge pipe is communicated with the bottom opening of the stripping kettle, the outlet of the second slag discharge pipe is communicated with the top slag inlet of the intermediate closed slag tank, and a second slag discharge valve is provided on the second slag discharge pipe; The air inlet of the second vacuum pipeline is connected to the top air outlet of the middle sealed slag pot, the air outlet of the second vacuum pipeline is connected to the air inlet of the vacuum pump, and the second vacuum pipeline is provided with a second vacuum valve; The slag inlet of the slag discharge pump is connected with the bottom slag outlet of the intermediate closed slag tank through a pipeline, and the slag outlet of the slag discharge pump is connected with the top slag inlet of the residual slag storage tank through a pipeline. A third slag discharge valve is arranged on the pipeline connecting the slag inlet of the slag discharge pump and the bottom slag outlet of the intermediate closed slag tank.

3. A slag discharge system for glycerol distillation residue according to claim 2, characterized in that: The first vacuum valve, the bottom blowing steam valve, the slag discharge steam valve, the first slag discharge valve, the second vacuum valve, the second slag discharge valve and the third slag discharge valve are all normally closed valves.

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