A chlorinated paraffin tail gas separation device

Abstract

The utility model discloses a chlorinated paraffin tail gas separation device, comprising a cyclone separator, a pretreatment system and a tail gas separator, wherein the chlorinated paraffin tail gas enters the cyclone separator through an air inlet of the cyclone separator, is communicated with the air inlet of the pretreatment system from the air outlet of the cyclone separator, the air outlet of the pretreatment system is communicated with the air inlet of the tail gas separator, and the chlorinated paraffin tail gas flows out from the air outlet of the tail gas separator; N layers of packing layers are arranged inside the tail gas separator, and the N layers of packing layers are arranged at equal distances; wherein the cyclone separator is used to separate the chlorinated paraffin in the chlorinated paraffin tail gas, the pretreatment system is used to cool and sediment the chlorinated paraffin tail gas, and the tail gas separator is used to separate the liquid-phase light liquid wax in the chlorinated paraffin tail gas.

Description

Technical Field

[0001] The utility model belongs to the technical field of chlorinated paraffin production, and particularly relates to a chlorinated paraffin tail gas separation device. Background Art

[0002] With the acceleration of industrialization, chlorinated paraffin, as an important chemical raw material, will produce a large amount of tail gas during the production process. These tail gases contain a large amount of hydrogen chloride and a small amount of unreacted chlorine, as well as light component liquid wax and chlorinated paraffin, which will be taken out with the tail gas. A large amount of hydrogen chloride and a small amount of chlorine in the tail gas can be recycled. If they are directly discharged, it will cause waste of raw materials and environmental pollution. Therefore, it is necessary to treat the tail gas. The existing tail gas treatment device is complicated to operate when treating the tail gas, which makes the equipment maintenance difficult. Therefore, there is an urgent need for a method that is simple to operate and can efficiently separate the tail gas of chlorinated paraffin. Utility Model Content

[0003] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a chlorinated paraffin tail gas separation device to solve the problem of how to separate chlorinated paraffin tail gas in the prior art.

[0004] A chlorinated paraffin tail gas separation device comprises a cyclone separator, a pretreatment system and a tail gas separator, wherein the chlorinated paraffin tail gas enters the cyclone separator through an air inlet of the cyclone separator, is communicated with the air inlet of the pretreatment system from an air outlet of the cyclone separator, the air outlet of the pretreatment system is communicated with the air inlet of the tail gas separator, and the chlorinated paraffin tail gas flows out from the air outlet of the tail gas separator; N layers of packing layers are arranged inside the tail gas separator, and the N layers of packing layers are arranged at equal distances.

[0005] The cyclone separator is used to separate the chlorinated paraffin in the chlorinated paraffin tail gas, the pretreatment system is used to cool and settle the chlorinated paraffin tail gas, and the tail gas separator is used to separate the liquid light wax in the chlorinated paraffin tail gas.

[0006] Preferably, the value of N is 5-8.

[0007] Preferably, the distance between each packing layer is 8 cm to 15 cm.

[0008] Preferably, the interior of the tail gas separator is connected to a plurality of mutually overlapping filler support cylinders, the bottom of each filler support cylinder is connected to a support grid, and the filler is placed on the support grid to form the filler layer.

[0009] Preferably, a support ring is connected to the filler support tube located at the bottom of the filler support tubes arranged overlapping each other.

[0010] Preferably, a heat exchanger is connected inside the tail gas separator, and the heat exchanger is used to adjust the temperature of the chlorinated paraffin tail gas.

[0011] Preferably, the gas outlet of the tail gas separator is connected to the gas inlet of the falling film absorption tower.

[0012] Preferably, the liquid phase outlet of the tail gas separator is connected to the reactor.

[0013] Preferably, the liquid phase outlet of the cyclone separator is connected to the reactor.

[0014] The utility model provides a chlorinated paraffin tail gas separation device, which can separate the chlorinated paraffin contained in the chlorinated paraffin tail gas by using a cyclone separator, and the pretreatment system performs cooling pretreatment and sedimentation pretreatment on the tail gas from which the chlorinated paraffin is separated, so that the tail gas can maintain a suitable temperature before entering the tail gas separator, and the sedimentation pretreatment can sediment other particulate matter in the tail gas, and further separate other impurities in the tail gas. The tail gas treated by the pretreatment system enters the tail gas separator, and the light liquid wax in the tail gas is separated by the tail gas separator. The tail gas treated by the tail gas separator contains hydrogen chloride and chlorine, and the hydrogen chloride and chlorine are then subjected to subsequent treatment. In the utility model, the tail gas in the production process of chlorinated paraffin can be separated by using a cyclone separator, a pretreatment system and a tail gas separator. The operation is simple. When maintaining the separation device, only the three devices need to be maintained separately. The separation effect is obvious, and the chlorinated paraffin, light liquid wax and other particulate matter in the tail gas can be effectively separated. That is, when the hydrogen chloride and chlorine in the tail gas are subsequently used to produce by-products, the hydrogen chloride and chlorine in the tail gas are treated to remove impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0016] Figure 1 It is a structural schematic diagram of the separation device provided by the utility model;

[0017] Figure 2 It is a structural schematic diagram of the packing support cylinder provided by the utility model;

[0018] Figure 3 It is a structural schematic diagram of a packing support cylinder provided by the utility model.

[0019] Description of main reference numerals:

[0020] 1- cyclone separator, 2- pretreatment system, 3- tail gas separator, 4- packing layer, 11- air inlet of cyclone separator, 12- air outlet of cyclone separator, 13- paraffin outlet of cyclone separator, 21- air inlet of pretreatment system, 22- air outlet of pretreatment system, 23- cooling water inlet of pretreatment system, 24- cooling water outlet of pretreatment system, 25- liquid wax outlet of pretreatment system, 31- air inlet of tail gas separator, 32- air outlet of tail gas separator, 33- liquid wax outlet of tail gas separator, 41- packing support tube, 42- support grid, 43- support ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0022] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.

[0025] See also Figure 1 The chlorinated paraffin tail gas separation device includes a cyclone separator 1, a pretreatment system 2 and a tail gas separator 3. The chlorinated paraffin tail gas enters the cyclone separator 1 through the air inlet 11 of the cyclone separator, and is communicated with the air inlet 21 of the pretreatment system from the air outlet 12 of the cyclone separator. The air outlet 22 of the pretreatment system is communicated with the air inlet 31 of the tail gas separator, and the chlorinated paraffin tail gas flows out from the air outlet 32 ​​of the tail gas separator. N layers of packing layers 4 are arranged inside the tail gas separator, and the N layers of packing layers are arranged at equal distances.

[0026] The cyclone separator 1 is used to separate the chlorinated paraffin in the chlorinated paraffin tail gas, the pretreatment system 2 is used to cool and settle the chlorinated paraffin tail gas, and the tail gas separator 3 is used to separate the liquid light wax in the chlorinated paraffin tail gas.

[0027] Specifically, the cyclone separator 1 is provided with a paraffin outlet 13 of the cyclone separator, and the chlorinated paraffin separated from the tail gas flows out from the paraffin outlet 13 of the cyclone separator. The pretreatment system 2 is provided with a cooling water inlet 23 and a cooling water outlet 24 of the pretreatment system, which can meet the cooling and sedimentation treatment of the tail gas by the pretreatment system 2. The pretreatment system 2 is provided with a liquid wax sewage outlet 25 of the pretreatment system, and the liquid wax sewage outlet 25 of the pretreatment system can discharge the liquid wax containing other particulate matter in the tail gas during the pretreatment process. The tail gas separator 3 is provided with a liquid wax outlet 33 of the tail gas separator, and the separated light liquid wax flows out from the liquid wax outlet 33 of the tail gas separator.

[0028] In the utility model, the tail gas in the production process of chlorinated paraffin can be separated by using the cyclone separator, the pretreatment system and the tail gas separator, which is easy to operate and maintain.

[0029] In a preferred embodiment, the value of N is 5 to 8. Specifically, as a more preferred embodiment, 5 layers of the packing layer are provided, which has a better separation effect, can effectively increase the contact area between the tail gas and the packing, and improve the separation efficiency.

[0030] In a preferred embodiment, the distance between each packing layer is 8 cm to 15 cm. Specifically, as a more preferred embodiment, the distance between each packing layer is 10 cm.

[0031] See also Figure 1 , Figure 2 and Figure 3 In a preferred embodiment, the interior of the exhaust gas separator is connected with a plurality of overlapping packing support tubes 41, and the bottom of each packing support tube 41 is connected with a support grid 42, and the packing is placed on the support grid 42 to form the packing layer 4. Specifically, as a more preferred embodiment, the height of each packing support tube 41 determines the distance between each packing layer, so this method is easier to operate the packing layer. The outer wall of the packing support tube 41 is directly in contact with the inner wall of the exhaust gas separator 3, and the gaps formed between the support grids 42 allow the exhaust gas to pass into the packing. See Figure 2 In this embodiment, only three filler support tubes 41 are provided, and a support grid 42 is connected to the bottom of each filler support tube 41 to support and place the filler.

[0032] See also Figure 2 In a preferred embodiment, a support ring 43 is connected to the bottommost packing support cylinder of the mutually overlapping packing support cylinders. Specifically, the support ring 43 is used to support the mutually overlapping packing support cylinders 41 so as to fix the mutually overlapping packing support cylinders 41 into the interior of the exhaust gas separator 3.

[0033] Specifically, the filler support tube 41 and the support ring 43 are both circular and have the same size, and the support grid 42 is a circular support grid.

[0034] In a preferred embodiment, a heat exchanger is connected to the tail gas separator, and the heat exchanger is used to adjust the temperature of the chlorinated paraffin tail gas. Specifically, a high-efficiency heat exchanger is provided inside the separator, which can achieve rapid adjustment of the tail gas temperature and further improve the separation effect.

[0035] In a preferred embodiment, the gas outlet of the tail gas separator is connected to the gas inlet of the falling film absorption tower. Specifically, the tail gas from the gas outlet of the tail gas separator contains hydrogen chloride and chlorine, which can enter the falling film absorption tower to produce by-products. After the separation device of the utility model, chlorinated paraffin, light liquid wax and other particulate matter in the tail gas are removed, which is the premise for the reuse of hydrogen chloride and chlorine in the tail gas.

[0036] In a preferred embodiment, the liquid phase outlet of the tail gas separator is connected to the reactor, that is, the liquid wax outlet 33 of the tail gas separator is connected to the reactor, and the separated light liquid wax can enter the reactor and flow back to the production line.

[0037] In a preferred embodiment, the liquid phase outlet of the cyclone separator is connected to the reactor, that is, the paraffin outlet 13 of the cyclone separator is connected to the reactor, and the separated chlorinated paraffin can enter the reactor and flow back to the production line.

[0038] In summary, the utility model provides a chlorinated paraffin tail gas separation device, which can separate the tail gas in the chlorinated paraffin production process by using a cyclone separator, a pretreatment system and a tail gas separator. It is simple to operate and easy to maintain, and can solve the problem of how to separate the chlorinated paraffin tail gas in the prior art. The separation device provided by the utility model can achieve efficient separation of chlorinated paraffin tail gas, significantly improve the tail gas treatment effect, and greatly improve the quality of the by-product hydrochloric acid product. At the same time, the useful components after separation can be recycled to achieve efficient utilization of resources.

[0039] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A chlorinated paraffin tail gas separation device, characterized in that: The invention comprises a cyclone separator, a pretreatment system and an exhaust gas separator, wherein the chlorinated paraffin exhaust gas enters the cyclone separator through an air inlet of the cyclone separator, is communicated with the air inlet of the pretreatment system through an air outlet of the cyclone separator, is communicated with the air inlet of the pretreatment system through an air outlet of the pretreatment system, and the chlorinated paraffin exhaust gas flows out from the air outlet of the exhaust gas separator; N layers of packing layers are arranged inside the exhaust gas separator, and the N layers of packing layers are arranged at equal distances; The cyclone separator is used to separate the chlorinated paraffin in the chlorinated paraffin tail gas, the pretreatment system is used to cool and settle the chlorinated paraffin tail gas, and the tail gas separator is used to separate the liquid light wax in the chlorinated paraffin tail gas.

2. The chlorinated paraffin tail gas separation device according to claim 1, characterized in that: The value of N is 5-8.

3. The chlorinated paraffin tail gas separation device according to claim 1, characterized in that: The distance between each packing layer is 8cm to 15cm.

4. The chlorinated paraffin tail gas separation device according to claim 1, characterized in that: The tail gas separator is internally connected with a plurality of mutually overlapping filler support cylinders, the bottom of each filler support cylinder is connected with a support grid, and the filler is placed on the support grid to form the filler layer.

5. The chlorinated paraffin tail gas separation device according to claim 4, characterized in that: A support ring is connected to the filler support tube located at the bottom of the filler support tubes that are overlapped with each other.

6. The chlorinated paraffin tail gas separation device according to claim 1, characterized in that: The tail gas separator is internally connected with a heat exchanger, and the heat exchanger is used to adjust the temperature of the chlorinated paraffin tail gas.

7. The chlorinated paraffin tail gas separation device according to claim 1, characterized in that: The gas outlet of the tail gas separator is communicated with the gas inlet of the falling film absorption tower.

8. The chlorinated paraffin tail gas separation device according to claim 1, characterized in that: The liquid phase outlet of the tail gas separator is communicated with the reaction kettle.

9. The chlorinated paraffin tail gas separation device according to claim 1, characterized in that: The liquid phase outlet of the cyclone separator is communicated with the reaction kettle.

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