Device for removing organic chlorine in oil product in presence of hydrogen

Abstract

The utility model provides a device for removing organic chlorine in an oil product in the presence of hydrogen, which comprises a feeding pump for providing fractionation raw materials; the heating furnace is used for heating the fractionation raw material to reach the temperature required by hydrogenation reaction; the first reactor is connected with the heating furnace and is used for removing impurities; the second reactor is connected with the first reactor and is used for removing oxygen in the oil product; the thermal high-pressure separator is connected with the second reactor and is used for carrying out oil-gas separation on the material at high temperature and high pressure; and the air cooler is connected with the hot high-pressure separator and is used for cooling the separated oil gas at low temperature. According to the device, an oil product containing organic chlorine is converted into a cleaner and safer product, meanwhile, the influence on the environment and corrosion to equipment are reduced through effective acidic material neutralization and ammonia removal, and the device can also adapt to continuous production of the device and has good convenience and economical efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen removal oil product organic chlorine device. BACKGROUND

[0002] The raw oil of oil product hydrogenation process contains high organic chlorine, and hydrogen chloride is generated in the hydrogenation process, which can easily cause serious corrosion of equipment and pipeline when meeting liquid water, thereby leading to device shutdown, and ammonium salt formed by hydrogen chloride is also easy to form salt crystallization in the cooling process, block the heat exchanger and air cooler, cause the heat exchange effect to be greatly discounted, equipment pressure drop increases, and compressor energy consumption increases and other problems. UTILITARY MODEL CONTENT

[0003] The utility model provides hydrogen removal oil product organic chlorine device can effectively solve the above -mentioned problem.

[0004] The utility model is realized as follows:

[0005] Hydrogen removal oil product organic chlorine device, the device includes

[0006] Feed pump is used for providing fractionation raw material;

[0007] Heating furnace is used for heating the fractionation raw material to reach the temperature required for hydrogenation reaction;

[0008] The first reactor is connected with the heating furnace and is used for removing impurities;

[0009] The second reactor is connected with the first reactor and is used for removing oxygen in the oil product;

[0010] Hot high-pressure separator is connected with the second reactor and is used for separating oil gas under high temperature and high pressure;

[0011] Air cooler is connected with the hot high-pressure separator and is used for cooling the separated oil gas under low temperature;

[0012] Cold high-pressure separator is connected with the air cooler and is used for secondary oil gas separation of the cooled oil gas under lower temperature.

[0013] As a further improvement, the bottom of the hot high-pressure separator is provided with an inlet hole for filling hot hydrogen from the inlet hole at the bottom of the hot high-pressure separator.

[0014] As a further improvement, the cold high-pressure separator includes a water washing section, and the ammonia in the circulating hydrogen is removed by the purified water in the water washing section.

[0015] As a further improvement, the purified water in the water washing section is washed from top to bottom.

[0016] As a further improvement, the overhead line of the hot high pressure separator is also provided with injection of excess ammonia water, so that the chlorine in the gas phase generates ammonium chloride, and all of it enters the waste liquid.

[0017] The utility model discloses the beneficial effect is:

[0018] (1) the case injects hot hydrogen gas at the bottom of the hot high pressure separator, reduces the solubility of chloride ion in the oil phase, makes it all go into the gas phase, and then injects excess ammonia water before the air cooler to remove all chloride ions, and let it all enter the waste liquid, in order to remove excess ammonia, inject purified water at the top of the cold high pressure separator to absorb the remaining ammonia, so that it is discharged from the waste liquid, prevent the corrosion problem of hydrogen chloride in the hydrogenation process of high-chlorine oil, at the same time, the dechlorination means of the case is continuous use, without use period, can adapt to the continuous production of device, has good convenience and economy. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced the drawing needed to be used in the embodiment, it should be understood, the following drawings only show some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0020] Figure 1 It is the flow chart of the utility model.

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] 1, feed pump;2, first reactor;3, second reactor;4, hot high pressure separator;5, cold high pressure separator;6, air cooler;7, heating furnace. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clearly, the following will be combined with the drawing in the embodiment of the utility model, and the technical scheme in the embodiment of the utility model is clearly and completely described, obviously, the described embodiment is a part of the embodiment of the utility model, instead of all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by ordinary skilled person in the art without making creative labor belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents the selected embodiment of the utility model.

[0024] In the description of the utility model, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0025] Referring to Figure 1 As shown, the hydrogen removal oil product organic chlorine device, the device comprises

[0026] The feed pump 1 is used for providing the fractionation raw material, the heating furnace 7 is used for heating the fractionation raw material to reach the temperature required for hydrogenation reaction, the first reactor 2 is connected with the heating furnace 7 and is used for removing impurities, the second reactor 3 is connected with the first reactor 2 and is used for removing oxygen in oil products, the hot high-pressure separator 4 is connected with the second reactor 3 and is used for separating oil gas under high temperature and high pressure, the air cooler 6 is connected with the hot high-pressure separator 4 and is used for cooling the separated oil gas at low temperature, and the cold high-pressure separator 5 is connected with the air cooler 6 and is used for carrying out secondary oil gas separation at lower temperature.

[0027] During processing, the raw material is sent into the feed pump 1 and mixed with new hydrogen, then enters the heating furnace 7, the mixture after heating enters the first reactor 2 for hydrogenation refining reaction to remove impurities, then is transported to the second reactor 3 to remove oxygen in oil products, then the mixture is transported to the hot high-pressure separator 4 and oil gas is separated under high temperature and high pressure. The air cooler is arranged after the hot high-pressure separator and is used for cooling the separated oil gas, and the cold high-pressure separator is arranged after the air cooler and is used for carrying out secondary oil gas separation at low temperature.

[0028] It should be noted that the first reactor 2 and the second reactor 3 can be a refining reactor and a deoxygenation reactor respectively, including but not limited to a refining reactor or a deoxygenation reactor, as long as the requirements of the process of the utility model can be met. Further, the number of the first reactor 2 and the third reactor 3 includes but is not limited to one, and can be multiple reactors connected, and the specific number can be set according to actual needs.

[0029] The bottom of the hot high-pressure separator 4 is provided with an inlet hole for pouring hot hydrogen gas from the inlet hole at the bottom of the hot high-pressure separator 4.

[0030] It is to be noted that in the traditional hydrogenation dechlorination process, desalted water is usually injected into the inlet of the hot high-pressure separator 4 to remove NH4Cl in the reaction effluent to prevent crystallization from blocking the heat exchanger. However, this method has some limitations. For example, when the NH3 in the reaction effluent is insufficient to combine with all the chloride ions, the HCl content in the waste liquid will be relatively high, which will cause serious corrosion of the equipment and require replacement of the high-exchange equipment material, resulting in a substantial increase in investment. Therefore, compared with the traditional scheme, the present case is provided with an inlet hole for conveying hot hydrogen gas at the bottom of the hot high-pressure separator 4. The hydrogen gas is conveyed from the bottom, which can reduce the solubility of chloride ions in the oil phase and promote more chloride ions to enter the gas phase, so that they are more easily removed in the subsequent treatment. At the same time, as shown in FIG. 6, it can be seen that the injection of excess ammonia water before the air cooler 6 can react with chloride ions to form ammonium chloride, thereby removing chloride ions from the system. This method can ensure that all chloride ions are removed, avoiding the problem of high HCl content caused by insufficient NH3 in the traditional method. In turn, when the HCl content in the waste liquid is reduced, the corrosion of the equipment is reduced, the need to replace the high-exchange equipment material due to equipment corrosion is reduced, and the investment cost is reduced. Figure 1

[0031] Furthermore, by improving the utilization efficiency of raw materials, waste emissions are reduced, achieving green at the source of fine chemical production, which is of great significance to improving the sustainability of the entire chemical process. Moreover, compared with physical separation techniques such as adsorption, although chlorinated organic compounds can be removed, secondary pollution is easily caused. The method of injecting hot hydrogen gas of the present case removes chloride ions through chemical reaction, reducing the risk of secondary pollution.

[0032] Further, the bottom of the hot high-pressure separator 4 is also provided with a hydrogen stripping, so that the hydrogen sulfide, hydrogen chloride and ammonia generated by hydrogenation are discharged from the top of the hot high-pressure separator.

[0033] The cold high-pressure separator 5 includes a water washing section for removing ammonia in the circulating hydrogen through the purified water in the water washing section. Further, in order to prevent the ammonia in the circulating hydrogen coming out of the top of the cold high-pressure separator from affecting the activity of the reaction catalyst and crystallizing in the system pipeline and equipment, the purified water in the water washing section is washed from top to bottom to remove the ammonia in the circulating hydrogen.

[0034] The present case also includes a hydrogenation treatment process of the hydrogenation dechlorination device for oil products:

[0035] S1, raw material preparation, new hydrogen (freshly produced hydrogen) is introduced into the hydrogenation device;

[0036] S2, heating, the raw oil (such as fractionated raw material) is heated in a heating furnace to reach the required temperature for hydrogenation reaction;

[0037] ​S3, deoxygenation, the heated oil enters the second reactor 3, and the oxygen in the oil is removed;

[0038] S4, hydrofining, the deoxygenated oil enters the first reactor 2, and a hydrofining reaction is carried out to remove impurities such as sulfur, nitrogen, chlorine, etc.;

[0039] S5, oil and gas separation (hot high-pressure separator 4), the material in the second reactor 3 enters the hot high-pressure separator 4, and oil and gas separation is carried out at high temperature and high pressure;

[0040] S6, cooling, the separated oil and gas enters the air cooler 6 for cooling to facilitate further processing;

[0041] S7, neutralization of acidic substances, ammonia water is injected before the air cooler 6 to neutralize the acidic substances such as HCl in the reaction effluent to generate ammonium chloride;

[0042] S8, secondary oil and gas separation (cold high-pressure separator 5), the cooled oil and gas enters the cold high-pressure separator 5 for secondary oil and gas separation at a lower temperature;

[0043] S9, removal of ammonia, purified water is injected at the top of the cold high-pressure separator 5 to absorb the remaining ammonia in the circulating hydrogen, preventing the influence of ammonia on the activity of the catalyst;

[0044] S10, waste liquid treatment, the waste liquid containing ammonium chloride and ammonium thiocyanate is discharged from the bottom of the cold high-pressure separator for subsequent treatment;

[0045] S11, product separation, the oil phase separated by the separator enters the fractionation section for further separation to obtain the refined product.

[0046] The above process is a continuous hydrogenation treatment process, which aims to convert oil containing organic chlorine into cleaner and safer products, while reducing the impact on the environment and equipment corrosion through effective neutralization of acidic substances and removal of ammonia. This process reflects the deep processing of raw oil and strict control of product quality.

[0047] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device for removing organic chlorine from oil products under hydrogenation, characterized in that: The device includes A feed pump (1) for providing fractionation raw materials; A heating furnace (7) for heating the fractionated raw material to reach a temperature required for a hydrogenation reaction; A first reactor (2), connected to the heating furnace (7), for removing impurities; A second reactor (3), connected to the first reactor (2), for removing oxygen from the oil product; A hot high-pressure separator (4), connected to the second reactor (3), is used to separate oil and gas from the material under high temperature and high pressure; an air cooler (6), connected to the hot high-pressure separator (4), for cooling the separated oil and gas at a low temperature; The cold high-pressure separator (5) is connected to the air cooler (6) and is used to perform secondary oil-gas separation on the cooled oil and gas at a lower temperature.

2. The device for removing organic chlorine from oil products by hydrolysis according to claim 1, characterized in that: The bottom of the hot high-pressure separator (4) is provided with an inlet hole for injecting hot hydrogen through the inlet hole at the bottom of the hot high-pressure separator (4).

3. The device for removing organic chlorine from oil products by hydrolysis according to claim 1, characterized in that: The cold high-pressure separator (5) includes a water washing section, and ammonia in the circulating hydrogen is removed by purified water in the water washing section.

4. The device for removing organic chlorine from oil products by hydrolysis according to claim 3, characterized in that: The purified water in the water washing section flushes from top to bottom.

5. The device for removing organic chlorine from oil products by hydrolysis according to claim 1, characterized in that: Excessive ammonia water is injected into the top pipeline of the hot high-pressure separator (4), so that the chlorine in the gas phase is converted into ammonium chloride, which is then completely discharged into the waste liquid.

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