Device for pre-preparing emulsion

Abstract

The device for pre - preparing emulsion disclosed by the present invention includes a liquid - preparation tank, which comprises a pre - heating tank and an oil - adding tank arranged side by side. A number of oil drums are placed in the pre - heating tank. The device for pre - preparing emulsion of the present invention uses the circulating emulsion as a heat source, and effectively pre - heats the demineralized water and rolling oil through two - stage heat exchange between the circulating emulsion and the demineralized water, and between the demineralized water and the rolling oil. This pre - heating method is reliable and can effectively avoid problems such as the deterioration and invalidation of the rolling oil, or the large amount of remaining oil that is difficult to recover. In addition, after uniformly mixing the pre - heated rolling oil and the demineralized water to obtain the pre - prepared emulsion and then adding it to the emulsion clean oil tank, this device can effectively reduce the fluctuation of the emulsion concentration and the oil consumption caused by the adsorption of the miscellaneous oil on the upper layer of the emulsion to the crude oil.

Description

Technical Field

[0001] The present invention belongs to the technical field of strip cold rolling equipment, and particularly relates to a device for pre-preparing emulsion liquid. Background Art

[0002] In the production of cold-rolled thin sheet mills, emulsion liquid needs to be used to implement effective process cooling and lubrication. The emulsion liquid needs to ensure the stability of the emulsion liquid composition and temperature through a circulating filtration cooling system. During the rolling process, with the consumption of the emulsion liquid, it is necessary to prepare and supplement the emulsion liquid at any time according to the needs of the rolling process conditions. In addition, the rolling oil commonly used in current cold rolling enterprises is composed of various base oils and a variety of additives, and is stored in oil drums of about 200L. It will start to solidify when the temperature is lower than 10°C. Therefore, before the cold rolling oil is used, especially in winter at low temperatures, it needs to be preheated first.

[0003] Currently, steam or tracing tape is usually used to directly preheat the rolling oil, and the preheated rolling oil is directly added to the emulsion liquid clean oil tank to achieve the preparation and supplement of the emulsion liquid. However, this method has the following problems: First, the reliability of directly preheating the rolling oil by steam or tracing tape is poor, and it is greatly affected by factors such as the heat source temperature and preheating time. It may cause problems such as the rolling oil being prone to deterioration and failure due to too high preheating temperature or too long preheating time, or the problem of a large amount of remaining oil and difficulty in recovery due to too low preheating temperature or too short preheating time; Second, directly adding the preheated rolling oil to the emulsion liquid clean oil tank may cause large fluctuations in the emulsion liquid concentration, which may lead to under-lubrication or over-lubrication phenomena during the cold rolling process. In addition, the miscellaneous oil floating on the upper layer of the emulsion liquid has a certain adsorption effect on the original oil, which is prone to cause an increase in oil consumption. Therefore, the present invention proposes a device for pre-preparing emulsion liquid, which can reliably preheat the rolling oil and pre-prepare the emulsion liquid, thereby reducing the fluctuation of the emulsion liquid concentration. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for pre-preparing emulsion liquid, which solves the problems of low reliability of preheating the rolling oil and large fluctuations in the emulsion liquid concentration caused by directly adding the preheated rolling oil to the emulsion liquid clean oil tank in the prior art.

[0005] The technical solution adopted by the present invention is that the device for pre-preparing emulsion liquid includes a liquid preparation tank, and the liquid preparation tank includes a preheating tank and an oil filling tank arranged in parallel. A number of oil drums are placed in the preheating tank.

[0006] The present invention is further characterized in that

[0007] The rolling oil in the oil drum is pumped into the oil filling tank by an oil filling pump group, and a stirrer is arranged in the oil filling tank.

[0008] The preheating tank includes an outer box body and an inner box body. The tops of the outer box body and the inner box body are open, and a connecting plate is provided at the opening. The outer box body, the inner box body and the connecting plate enclose a closed circulating emulsion accommodating cavity; the oil barrel is placed inside the inner box body.

[0009] A plurality of support ribs are provided between the bottom walls of the outer box body and the inner box body.

[0010] A circulating emulsion inlet connecting pipe and a circulating emulsion outlet connecting pipe are provided on the side wall of the outer box body.

[0011] The circulating emulsion inlet connecting pipe is arranged near the bottom of the outer box body, and the circulating emulsion outlet connecting pipe is arranged near the top of the outer box body.

[0012] A desalted water inlet connecting pipe and a desalted water outlet connecting pipe are provided on the side wall of the inner box body, and both the desalted water inlet connecting pipe and the desalted water outlet connecting pipe penetrate through the outer box body.

[0013] The desalted water inlet connecting pipe is arranged near the bottom of the inner box body, the desalted water outlet connecting pipe is arranged near the top of the inner box body, and the height from the top of the desalted water outlet connecting pipe to the bottom wall of the inner box body is less than the height of the oil barrel.

[0014] A fuel filling output connecting pipe is provided near the bottom on the side wall of the fuel filling tank.

[0015] Switch valves are arranged in the pipe sections of the circulating emulsion inlet connecting pipe, the desalted water inlet connecting pipe and the fuel filling output connecting pipe.

[0016] The beneficial effects of the present invention are as follows.

[0017] (1) The device for pre-preparing the emulsion of the present invention is arranged in parallel with the circulating filtration and cooling system of the process lubrication system, uses the circulating emulsion before cooling as the heat source, and effectively realizes the preheating of the desalted water and the rolling oil through two-stage heat exchange between the circulating emulsion and the desalted water, and between the desalted water and the rolling oil. Moreover, this preheating method is reliable and can effectively avoid problems such as the deterioration and failure of the rolling oil or the large amount of remaining oil and difficult recovery.

[0018] (2) The preheated desalted water and the pre-prepared emulsion of the device for pre-preparing the emulsion of the present invention both enter the subsequent equipment by means of gravity flow, which can save energy to a certain extent. And after the preheated rolling oil and the desalted water are mixed evenly to obtain the pre-prepared emulsion, the pre-prepared emulsion is added to the emulsion clean oil tank, which can reduce the fluctuation of the emulsion concentration and the oil consumption caused by the adsorption of the miscellaneous oil on the upper layer of the emulsion to the crude oil. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the device for pre-preparing the emulsion of the present invention;

[0020] Figure 2It is the top view of the device for pre - preparing emulsified liquid of the present invention.

[0021] In the figure, 1. liquid - preparation tank, 2. pre - heating tank, 2 - 1. outer box body, 2 - 2. inner box body, 2 - 3. connecting plate, 3. oil - adding tank, 4. oil barrel, 5. oil - adding pump group, 6. agitator, 7. circulating emulsified - liquid inlet connecting pipe, 8. circulating emulsified - liquid outlet connecting pipe, 9. desalted - water inlet connecting pipe, 10. desalted - water outlet connecting pipe, 11. oil - adding output connecting pipe. Detailed implementation mode

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation modes.

[0023] The structure of the device for pre - preparing emulsified liquid of the present invention is as Figure 1 shown, including a liquid - preparation tank 1. The liquid - preparation tank 1 includes a pre - heating tank 2 and an oil - adding tank 3 arranged side by side. The pre - heating tank 2 is used for pre - heating desalted water and rolling oil, and the oil - adding tank 3 is used for mixing the pre - heated desalted water and rolling oil. Several oil barrels 4 are placed in the pre - heating tank 2, and the rolling oil for pre - preparing emulsified liquid is contained in the oil barrels 4.

[0024] Among them, the pre - heating tank 2 includes an outer box body 2 - 1 and an inner box body 2 - 2. The tops of the outer box body 2 - 1 and the inner box body 2 - 2 are open, and a connecting plate 2 - 3 is arranged at the opening. The outer box body 2 - 1, the inner box body 2 - 2 and the connecting plate 2 - 3 enclose a closed circulating - emulsified - liquid accommodation cavity for accommodating circulating emulsified liquid and providing heat source for the pre - heating tank 2; the oil barrels 4 are placed in the inner box body 2 - 2 of the pre - heating tank 2, and the rolling oil in the oil barrels 4 is pumped into the oil - adding tank 3 by the oil - adding pump group 5 or added to the oil - adding tank 3 by pouring the whole barrel. In addition, in order to support the inner box body 2 - 2 and ensure the stability of the double - layer structure of the outer box body 2 - 1 and the inner box body 2 - 2, the present invention also arranges several support ribs between the bottom walls of the outer box body 2 - 1 and the inner box body 2 - 2. The model, quantity, etc. of the support ribs are determined according to the actual load of the inner box body, and the installation of the support ribs cannot block the flow of circulating emulsified liquid.

[0025] A circulation emulsion liquid inlet pipe 7 and a circulation emulsion liquid outlet pipe 8 are arranged on the side wall of the outer box body 2-1. Among them, the circulation emulsion liquid inlet pipe 7 is connected to the pipe section in front of the cooler in the existing circulation filtration and cooling system, and a switch valve is arranged on the pipe section of the circulation emulsion liquid inlet pipe 7 to control the opening and closing of the circulation emulsion liquid pipeline. The circulation emulsion liquid outlet pipe 8 is connected to the return oil tank of the existing emulsion liquid station. Under the action of the circulation pump, the circulation emulsion liquid serving as a heat source is injected into the circulation emulsion liquid accommodating cavity of the preheating box 2. After heat exchange and cooling with the demineralized water and rolling oil in the inner box body 2-2, it flows from the circulation emulsion liquid outlet pipe 8 to the return oil tank of the emulsion liquid station. In order to ensure the full utilization of the heat of the circulation emulsion liquid, the circulation emulsion liquid inlet pipe 7 of the present invention is arranged close to the bottom of the outer box body 2-1, and the circulation emulsion liquid outlet pipe 8 is arranged close to the top of the outer box body 2-1. In order to facilitate the installation of on-site pipelines and ensure the heat exchange effect as much as possible, the circulation emulsion liquid inlet pipe 7 and the circulation emulsion liquid outlet pipe 8 of the present invention are arranged on the diagonal line of the same side wall of the outer box body 2-1.

[0026] The oil barrel 4 is placed inside the inner box body 2-2 of the preheating box 2. A demineralized water inlet pipe 9 and a demineralized water outlet pipe 10 penetrating the side wall of the outer box body 2-1 are arranged on the side wall of the inner box body 2-2. Among them, the demineralized water inlet pipe 9 is connected to the demineralized water node of the workshop, injects demineralized water into the inner box body 2-2, realizes the preheating of the demineralized water through the heat exchange between the circulation emulsion liquid and the demineralized water, and realizes the preheating of the rolling oil through the heat exchange between the demineralized water and the rolling oil. And a switch valve is arranged on the pipe section of the demineralized water inlet pipe 9 to control the opening and closing of the demineralized water pipeline; the outlet of the demineralized water outlet pipe 10 is arranged inside the adjacent fuel filling box 3, and the preheated demineralized water flows into the fuel filling box by gravity through the demineralized water outlet pipe 10 and is mixed with the rolling oil in the fuel filling box 3. The present invention mainly realizes the preheating of the demineralized water and the rolling oil through two-stage heat exchange between the circulation emulsion liquid and the demineralized water, and between the demineralized water and the rolling oil. While saving energy, it can effectively avoid the problems in the prior art that the rolling oil is prone to deterioration and failure due to too high preheating temperature or too long preheating time during the preheating process of the rolling oil by steam or heat tracing belt, and the problems of large residual oil volume and difficult recovery caused by too low preheating temperature or short preheating time and incomplete melting of the rolling oil. In addition, in order to prevent the demineralized water from entering the oil barrel 4, the height from the top of the demineralized water outlet pipe 10 to the bottom wall of the inner box body 2-2 is less than the height of the oil barrel 4.

[0027] A stirrer 6 is also arranged in the fuel filling box 3 to mix the preheated demineralized water and the rolling oil evenly to obtain a pre-prepared emulsion liquid. A fuel filling output pipe 11 is arranged close to the bottom on the side wall of the fuel filling box 3, and a switch valve is arranged on the pipe section of the fuel filling output pipe 11 to control the opening and closing of the pre-prepared emulsion liquid pipeline. During use, the switch valve is opened, and the pre-prepared emulsion liquid flows into the clean oil tank of the emulsion liquid station by gravity through the fuel filling output pipe 11 to complete the oil replenishment.

[0028] In actual work, the device for pre-preparing the emulsion of the present invention is connected in parallel with the circulating filtering and cooling system of the process lubrication system, and the circulating emulsion before cooling by the circulating filtering and cooling system is used as the heat source. The specific working process is as follows:

[0029] (1) Connecting pipelines: Connect the circulating emulsion inlet pipe 7 to the pipe section at the front end of the cooler in the existing circulating filtration cooling system, and connect the circulating emulsion outlet pipe 8 to the existing emulsion station return tank; connect the desalted water inlet pipe 9 to the existing workshop desalted water node; connect the refueling outlet pipe 11 to the emulsion station clean oil tank.

[0030] (2) Preheating process: Open the switch valve in the circulating emulsion inlet pipe section 7, and the circulating emulsion with heat enters the circulating emulsion containing chamber of the preheating box 2, and exchanges heat with the desalted water in the inner box 2-2 and the rolling oil in the oil barrel 4. While preheating the desalted water and the rolling oil, the circulating emulsion heat is cooled and flows through the circulating emulsion outlet pipe 8 to the emulsion station return tank.

[0031] (3) Oil replenishment process: adjust the switch valve in the pipe section of the desalted water inlet pipe 9 so that the preheated desalted water flows into the refueling tank 3 through the desalted water outlet pipe 10 by gravity; add the preheated rolling oil into the refueling tank 3 by opening the refueling pump group 5 or pouring the whole barrel; after the desalted water and rolling oil are evenly stirred by the stirrer 6, open the switch valve in the pipe section of the refueling outlet pipe 11 so that the pre-prepared emulsion flows into the emulsion station clean oil tank by gravity, completing the oil replenishment.

Claims

1. An apparatus for pre-preparing an emulsion, characterized in that, It includes a liquid preparation tank (1), and the liquid preparation tank (1) includes a preheating tank (2) and an oil filling tank (3) arranged side by side. A number of oil drums (4) are placed in the preheating tank (2). The preheating tank (2) includes an outer box body (2-1) and an inner box body (2-2). The tops of the outer box body (2-1) and the inner box body (2-2) are open, and a connecting plate (2-3) is arranged at the opening. The outer box body (2-1), the inner box body (2-2) and the connecting plate (2-3) enclose a closed circulating emulsion accommodating cavity. The oil drums (4) are placed inside the inner box body (2-2). A circulating emulsion inlet connecting pipe (7) and a circulating emulsion outlet connecting pipe (8) are arranged on the side wall of the outer box body (2-1). The circulating emulsion inlet connecting pipe (7) is arranged near the bottom of the outer box body (2-1), and the circulating emulsion outlet connecting pipe (8) is arranged near the top of the outer box body (2-1). A desalted water inlet connecting pipe (9) and a desalted water outlet connecting pipe (10) are arranged on the side wall of the inner box body (2-2), and both the desalted water inlet connecting pipe (9) and the desalted water outlet connecting pipe (10) penetrate through the outer box body (2-1). The desalted water inlet connecting pipe (9) is arranged near the bottom of the inner box body (2-2), the desalted water outlet connecting pipe (10) is arranged near the top of the inner box body (2-2), and the height from the top of the pipe of the desalted water outlet connecting pipe (10) to the bottom wall of the inner box body (2-2) is less than the height of the oil drum (4).

2. The device for pre - preparing an emulsion according to claim 1, characterized in that, The rolling oil in the oil drum (4) is pumped into the oil filling tank (3) by an oil filling pump group (5), and a stirrer (6) is arranged in the oil filling tank (3).

3. The device for pre - preparing emulsion according to claim 1, characterized in that, A number of support ribs are arranged between the bottom walls of the outer box body (2-1) and the inner box body (2-2).

4. The device for pre - preparing an emulsion according to claim 1, characterized in that, An oil filling output port connecting pipe (11) is arranged near the bottom on the side wall of the oil filling tank (3).

5. The device for pre - preparing an emulsion according to claim 4, characterized in that, Switch valves are arranged in the pipe sections of the circulating emulsion inlet connecting pipe (7), the desalted water inlet connecting pipe (9) and the oil filling output port connecting pipe (11).

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