Low-pressure pipeline series connection device

Abstract

The utility model relates to the technical field of titanium dioxide production, in particular to a low-pressure pipeline series connection device which comprises a first-stage oxygen buffer tank, a first-stage nitrogen buffer tank, a second-stage oxygen buffer tank and a second-stage nitrogen buffer tank. The second-stage nitrogen buffer tank is connected into the first-stage nitrogen buffer tank through a nitrogen intercommunication pipeline, a descending pipe is arranged at the end, close to the first-stage oxygen buffer tank, of the oxygen intercommunication pipeline, an ascending pipe is arranged at the end, close to the second-stage oxygen buffer tank, of the oxygen intercommunication pipeline, a butterfly valve is installed on the ascending pipe, and the nitrogen intercommunication pipeline and the oxygen intercommunication pipeline are the same in structure. According to the low-pressure pipeline series connection device, first-stage nitrogen and second-stage nitrogen and oxygen are connected in series through the oxygen intercommunication pipeline and the nitrogen intercommunication pipeline which are arranged in the low-pressure pipeline series connection device and then can be standby for each other on the two sides, oxygen and nitrogen compressors can be maintained on the premise that gas supply is not affected after series connection, and the pressure of oxygen and nitrogen is better controlled after series connection.

Description

TECHNICAL FIELD

[0001] The utility model relates to titanium dioxide production technical field, specifically, relate to a low pressure pipeline series connection device. BACKGROUND

[0002] The chlorination method has the advantages of high production efficiency, stable product quality, less three wastes emission, short process flow and the like. The chlorination method production process of titanium dioxide includes titanium tetrachloride preparation, titanium tetrachloride oxidation and titanium dioxide surface treatment three parts, and the titanium tetrachloride oxidation is a key link of the chlorination method titanium dioxide production, and the oxidation process is directly related to the quality of product and the sustainability and economy of production.

[0003] In the titanium tetrachloride oxidation process, multiple oxidations need to be carried out, i.e. the input of first-stage and second-stage nitrogen and oxygen, in the prior art, oxygen and nitrogen are compressed by a compressor after passing through a front buffer tank from a fractionating tower, and then supplied to the oxidation position, the first-stage and second-stage low-pressure pipelines in the prior art are separated, the first-stage input can only be input to the first-stage nitrogen and oxygen compressor, and the second-stage input can only be input to the second-stage oxygen and nitrogen compressor, so that mutual use and mutual communication cannot be realized, for example, when the gas amount of a pipeline is excessive or the machine is under maintenance, the excessive nitrogen and oxygen cannot be sent to the machine under maintenance for compression, so that the gas is wasted, and when the gas amount of a pipeline is insufficient, the pipeline cannot be quickly supplemented, so that the transportation is interrupted and is not conducive to the titanium tetrachloride oxidation. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a low pressure pipeline series connection device to solve the problem that the first-stage and second-stage low-pressure pipelines in the prior art are separated, the first-stage input can only be input to the first-stage nitrogen and oxygen compressor, and the second-stage input can only be input to the second-stage oxygen and nitrogen compressor, so that mutual use and mutual communication cannot be realized.

[0005] To achieve the above object, the utility model provides a low pressure pipeline series connection device, including first stage oxygen buffer tank, first stage nitrogen buffer tank, second stage oxygen buffer tank and second stage nitrogen buffer tank, the top of second stage oxygen buffer tank is connected with first stage oxygen buffer tank through oxygen mutual communication pipeline, second stage nitrogen buffer tank is connected with first stage nitrogen buffer tank through nitrogen mutual communication pipeline, the one end close to first stage oxygen buffer tank of oxygen mutual communication pipeline is provided with downcomer, the one end close to second stage oxygen buffer tank of oxygen mutual communication pipeline is provided with riser, is installed butterfly valve on riser, the structure of nitrogen mutual communication pipeline is same with oxygen mutual communication pipeline.

[0006] Preferably, a first-stage fractionating tower is arranged between the first-stage oxygen buffer tank and the first-stage nitrogen buffer tank, the first-stage fractionating tower is communicated with the first-stage oxygen buffer tank through a first-stage oxygen delivery pipe, and the first-stage fractionating tower is communicated with the first-stage nitrogen buffer tank through a first-stage nitrogen delivery pipe.

[0007] As preferred, a two-stage fractionating tower is arranged between the two-stage oxygen buffer tank and the two-stage nitrogen buffer tank, the two-stage fractionating tower is communicated with the two-stage oxygen buffer tank through a two-stage oxygen delivery pipe, and the two-stage fractionating tower is communicated with the two-stage nitrogen buffer tank through a two-stage nitrogen delivery pipe.

[0008] As preferred, an oxygen inlet compressor is externally connected to the top of the first-stage oxygen buffer tank through a pipeline, and a nitrogen inlet compressor is externally connected to the top of the first-stage nitrogen buffer tank through a pipeline.

[0009] As preferred, a first main pipe is connected to one side of the upper portion of the two-stage oxygen buffer tank, the outer end of the first main pipe is connected to an oxygen inlet compressor, a first shunt interface is arranged on the first main pipe, the first shunt interface is externally connected to an oxygen intercommunication pipeline, and the bottom of the two-stage oxygen buffer tank is communicated with the two-stage oxygen delivery pipe through a first access pipe.

[0010] As preferred, a second main pipe is connected to one side of the upper portion of the two-stage nitrogen buffer tank, the outer end of the second main pipe is connected to a nitrogen inlet compressor, a second shunt interface is arranged on the second main pipe, the second shunt interface is externally connected to a nitrogen intercommunication pipeline, and the bottom of the two-stage nitrogen buffer tank is communicated with the two-stage nitrogen delivery pipe through a second access pipe.

[0011] As preferred, a heat insulation layer is arranged in the two-stage oxygen buffer tank, and a corrosion-proof layer is arranged in the inner side of the heat insulation layer, and the two-stage oxygen buffer tank and the two-stage nitrogen buffer tank have the same structure.

[0012] As preferred, the volume of the first-stage oxygen buffer tank and the first-stage nitrogen buffer tank is 10 cubic meters, and the volume of the two-stage oxygen buffer tank and the two-stage nitrogen buffer tank is 50 cubic meters.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] In the low-pressure pipeline series connection device, the first-stage and the two-stage nitrogen and oxygen are connected in series through the oxygen intercommunication pipeline and the nitrogen intercommunication pipeline arranged therein, and the two sides can be used as standby for each other, the oxygen compressor and the nitrogen compressor can be maintained without affecting the gas supply after being connected in series, and the pressure of the oxygen and the nitrogen is better controlled after being connected in series. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic view of the utility model;

[0016] Figure 2 It is a structure schematic view of the oxygen intercommunication pipeline in the utility model;

[0017] Figure 3 It is a structure schematic view of the two-stage oxygen buffer tank in the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the second-stage nitrogen buffer tank in this utility model.

[0019] The meanings of the labels in the diagram are as follows:

[0020] 1. Phase I Oxygen Buffer Tank; 2. Phase I Nitrogen Buffer Tank; 3. Phase I Fractionating Tower; 31. Phase I Oxygen Delivery Pipe; 32. Phase I Nitrogen Delivery Pipe; 4. Phase II Oxygen Buffer Tank; 41. First Main Pipe; 42. First Diversion Interface; 43. First Inlet Pipe; 44. Insulation Layer; 45. Anti-corrosion Layer; 5. Phase II Nitrogen Buffer Tank; 51. First Main Pipe; 52. First Diversion Interface; 53. First Inlet Pipe; 6. Phase II Fractionating Tower; 61. Phase II Oxygen Delivery Pipe; 62. Phase II Nitrogen Delivery Pipe; 7. Oxygen Inlet Compressor; 8. Nitrogen Inlet Compressor; 9. Oxygen Interconnection Pipeline; 91. Downcomer; 92. Ascendant; 93. Butterfly Valve; 10. Nitrogen Interconnection Pipeline. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model provides a low-pressure pipeline series connection device, such as Figures 1-4 As shown, the system includes a primary oxygen buffer tank 1, a primary nitrogen buffer tank 2, a secondary oxygen buffer tank 4, and a secondary nitrogen buffer tank 5. The top of the secondary oxygen buffer tank 4 is connected to the primary oxygen buffer tank 1 via an oxygen interconnection pipeline 9. The secondary nitrogen buffer tank 5 is connected to the primary nitrogen buffer tank 2 via a nitrogen interconnection pipeline 10. A downcomer 91 is installed at the end of the oxygen interconnection pipeline 9 near the primary oxygen buffer tank 1, and an ascender 92 is installed at the end of the oxygen interconnection pipeline 9 near the secondary oxygen buffer tank 4. A butterfly valve is installed on the ascender 92. Valve 93, by switching butterfly valve 93, enables the flow and closure of gas. When butterfly valve 93 is opened, the gas is separated, and the pressure is reduced, thereby achieving good control of the gas supply pressure. The nitrogen interconnection pipeline 10 has the same structure as the oxygen interconnection pipeline 9. The oxygen interconnection pipeline 9 and nitrogen interconnection pipeline 10 realize the series connection of the pipelines between the first and second phases, thereby ensuring that the gas in the second phase oxygen buffer tank 4 can be introduced into the first phase oxygen buffer tank 1, and the gas in the second phase nitrogen buffer tank 5 can be introduced into the first phase nitrogen buffer tank 2.

[0023] In this embodiment, a first-stage oxygen buffer tank 1 and a first-stage nitrogen buffer tank 2 are provided with a first-stage fractionating tower 3, the first-stage fractionating tower 3 is communicated with the first-stage oxygen buffer tank 1 through a first-stage oxygen delivery pipe 31, the first-stage fractionating tower 3 is communicated with the first-stage nitrogen buffer tank 2 through a first-stage nitrogen delivery pipe 32, oxygen and nitrogen are generated through the first-stage fractionating tower 3 and are respectively introduced into the first-stage oxygen buffer tank 1 and the first-stage nitrogen buffer tank 2.

[0024] Specifically, a second-stage oxygen buffer tank 4 and a second-stage nitrogen buffer tank 5 are provided with a second-stage fractionating tower 6, the second-stage fractionating tower 6 is communicated with the second-stage oxygen buffer tank 4 through a second-stage oxygen delivery pipe 61, the second-stage fractionating tower 6 is communicated with the second-stage nitrogen buffer tank 5 through a second-stage nitrogen delivery pipe 62, oxygen and nitrogen are generated through the second-stage fractionating tower 6 and are respectively introduced into the second-stage oxygen buffer tank 4 and the second-stage nitrogen buffer tank 5.

[0025] Further, the top of the first-stage oxygen buffer tank 1 is externally connected with an oxygen inlet compressor 7 through a pipeline, which is used for pressurizing the oxygen and introducing the pressurized oxygen into an oxygen supply position, the top of the first-stage nitrogen buffer tank 2 is externally connected with a nitrogen inlet compressor 8 through a pipeline, which is used for pressurizing the nitrogen and introducing the pressurized nitrogen into a nitrogen supply position.

[0026] Further, the upper side of the second-stage oxygen buffer tank 4 is connected with a first main pipe 41, the outer end of the first main pipe 41 is connected with an oxygen inlet compressor 7, the first main pipe 41 is provided with a first shunt interface 42, the first shunt interface 42 is externally connected with an oxygen intercommunication pipeline 9, the bottom of the outer side of the second-stage oxygen buffer tank 4 is communicated with the second-stage oxygen delivery pipe 61 through a first access pipe 43, which facilitates the smooth connection of the pipeline of the second-stage oxygen buffer tank 4.

[0027] Further, the upper side of the second-stage nitrogen buffer tank 5 is connected with a second main pipe 51, the outer end of the second main pipe 51 is connected with a nitrogen inlet compressor 8, the second main pipe 51 is provided with a second shunt interface 52, the second shunt interface 52 is externally connected with a nitrogen intercommunication pipeline 10, the bottom of the outer side of the second-stage nitrogen buffer tank 5 is communicated with the second-stage nitrogen delivery pipe 62 through a second access pipe 53, which facilitates the smooth connection of the pipeline of the second-stage nitrogen buffer tank 5.

[0028] Further, the inner side of the second-stage oxygen buffer tank 4 is provided with a heat insulation layer 44, the heat insulation layer 44 is made of asbestos tile material and has high heat insulation property, the inner side of the heat insulation layer 44 is provided with a corrosion-resistant layer 45, the corrosion-resistant layer 45 is made of epoxy phenolic paint and has good corrosion resistance, so that the second-stage oxygen buffer tank 4 has good corrosion resistance, and the second-stage oxygen buffer tank 4 and the second-stage nitrogen buffer tank 5 have the same structure.

[0029] Further, the volume of the first oxygen buffer tank 1 and the first nitrogen buffer tank 2 is 10 cubic meters, the volume of the second oxygen buffer tank 4 and the second nitrogen buffer tank 5 is 50 cubic meters, more oxygen and nitrogen are stored in the second oxygen buffer tank 4 and the second nitrogen buffer tank 5, and the first oxygen buffer tank 1 and the first nitrogen buffer tank 2 can be supplied with oxygen when oxygen is insufficient.

[0030] The low-pressure pipeline series connection device of the utility model in use, first connect the tank body and pipeline of the device, realize the series connection of the pipeline between the first stage and the second stage through the oxygen intercommunication pipeline 9 and the nitrogen intercommunication pipeline 10, thereby ensuring that the gas in the second oxygen buffer tank 4 can be introduced into the first oxygen buffer tank 1, and the gas in the second nitrogen buffer tank 5 can be introduced into the first nitrogen buffer tank 2, when oxygen needs to be introduced, open the butterfly valve 93 on the oxygen intercommunication pipeline 9, oxygen rises to the oxygen intercommunication pipeline 9 along the ascending pipe 92, and then enters the first oxygen buffer tank 1 through the descending pipe 91, in the same way, the excess nitrogen in the second nitrogen buffer tank 5 can be introduced into the first nitrogen buffer tank 2 through the nitrogen intercommunication pipeline 10, realizing flexible gas delivery, when equipment maintenance is carried out, one oxygen compressor 7 or nitrogen compressor 8 is closed, and the other oxygen compressor 7 or nitrogen compressor 8 can realize gas supply.

[0031] Finally, it needs to be explained that the oxygen compressor 7, the nitrogen compressor 8 and the like in the embodiment, the electronic components in the above components are all general standard components or components known by those skilled in the art, the structure and principle thereof are known by those skilled in the art through technical manuals or through conventional experimental methods, all the electrical components are respectively connected through wires at the idle place of the device, the specific connection means should be referred to the working order of the electrical components in the above working principle to complete the electrical connection, and all of them are the commonly known technology in the art.

[0032] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above embodiments, the above embodiments and the description in the specification are only preferred examples of the utility model, and are not used to limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A low pressure pipeline series device comprising a first oxygen buffer tank (1), a first nitrogen buffer tank (2), a second oxygen buffer tank (4) and a second nitrogen buffer tank (5), characterized in that: The top of the second-stage oxygen buffer tank (4) is connected to the first-stage oxygen buffer tank (1) through an oxygen intercommunication pipeline (9), the second-stage nitrogen buffer tank (5) is connected to the first-stage nitrogen buffer tank (2) through a nitrogen intercommunication pipeline (10), the oxygen intercommunication pipeline (9) is provided with a downcomer (91) at one end close to the first-stage oxygen buffer tank (1), the oxygen intercommunication pipeline (9) is provided with an upcomer (92) at one end close to the second-stage oxygen buffer tank (4), the upcomer (92) is provided with a butterfly valve (93), and the nitrogen intercommunication pipeline (10) has the same structure as the oxygen intercommunication pipeline (9).

2. The low pressure in-line device of claim 1, wherein: The first-stage oxygen buffer tank (1) and the first-stage nitrogen buffer tank (2) are provided with a first-stage fractional distillation column (3) therebetween, the first-stage fractional distillation column (3) is communicated with the first-stage oxygen buffer tank (1) through a first-stage oxygen delivery pipeline (31), and the first-stage fractional distillation column (3) is communicated with the first-stage nitrogen buffer tank (2) through a first-stage nitrogen delivery pipeline (32).

3. The low pressure in-line device of claim 1, wherein: The second-stage oxygen buffer tank (4) and the second-stage nitrogen buffer tank (5) are provided with a second-stage fractional distillation column (6) therebetween, the second-stage fractional distillation column (6) is communicated with the second-stage oxygen buffer tank (4) through a second-stage oxygen delivery pipeline (61), and the second-stage fractional distillation column (6) is communicated with the second-stage nitrogen buffer tank (5) through a second-stage nitrogen delivery pipeline (62).

4. The low pressure in-line device of claim 1, wherein: The top of the first-stage oxygen buffer tank (1) is externally connected with an oxygen inlet compressor (7) through a pipeline, and the top of the first-stage nitrogen buffer tank (2) is externally connected with a nitrogen inlet compressor (8) through a pipeline.

5. The low pressure in-line device of claim 3, wherein: The upper side of the second-stage oxygen buffer tank (4) is connected with a first main pipeline (41), the outer end of the first main pipeline (41) is connected with an oxygen inlet compressor (7), the first main pipeline (41) is provided with a first shunt interface (42), the first shunt interface (42) is externally connected with an oxygen intercommunication pipeline (9), and the outer bottom of the second-stage oxygen buffer tank (4) is communicated with a second-stage oxygen delivery pipeline (61) through a first connecting pipeline (43).

6. The low pressure in-line device of claim 3, wherein: The upper side of the second-stage nitrogen buffer tank (5) is connected with a second main pipeline (51), the outer end of the second main pipeline (51) is connected with a nitrogen inlet compressor (8), the second main pipeline (51) is provided with a second shunt interface (52), the second shunt interface (52) is externally connected with a nitrogen intercommunication pipeline (10), and the outer bottom of the second-stage nitrogen buffer tank (5) is communicated with a second-stage nitrogen delivery pipeline (62) through a second connecting pipeline (53).

7. The low pressure in-line device of claim 1, wherein: The inner side of the second-stage oxygen buffer tank (4) is provided with a heat insulation layer (44), the inner side of the heat insulation layer (44) is provided with a corrosion-resistant layer (45), and the second-stage oxygen buffer tank (4) has the same structure as the second-stage nitrogen buffer tank (5).

8. The low pressure in-line device of claim 1, wherein: The volume of the first-stage oxygen buffer tank (1) and the first-stage nitrogen buffer tank (2) is 10 cubic meters, and the volume of the second-stage oxygen buffer tank (4) and the second-stage nitrogen buffer tank (5) is 50 cubic meters.

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