Glass-burning natural gas and coal gas adjustable system and adjusting method thereof

Abstract

The invention relates to the technical field of glass production, in particular to an adjustable system for natural gas and coal gas for burning glass and an adjusting method thereof.The adjustable system comprises a natural gas main pipeline, a coal gas main pipeline and a mixed gas pipeline; wherein a gas outlet of the natural gas main pipeline is communicated with a first gas inlet of the mixed gas pipeline, a gas outlet of the coal gas main pipeline is communicated with a second gas inlet of the mixed gas pipeline, and a gas outlet of the mixed gas pipeline is communicated with a gas inlet of the combustor; a first ball valve, a first flow meter, a natural gas adjusting valve, a second ball valve and a pneumatic ball valve are sequentially and fixedly arranged on the natural gas main pipeline in the flowing direction of natural gas. By means of adjustable mixed combustion of natural gas and coal gas, cost can be saved by%-%, energy is saved, and emission of nitric oxide is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of glass production, and in particular to an adjustable system for burning natural gas and coal gas for glass and an adjusting method thereof. Background Art

[0002] The glass industry is a high-energy-consuming industry. The fuels used for glass melting include coal, petroleum coke, heavy oil, natural gas, diesel, coke oven gas, etc. At present, except for some areas, the domestic energy structure has gradually shifted to a clean fuel natural gas-based energy structure. By the end of 2022, the proportion of natural gas used as fuel in my country's glass melting furnaces was 45.9%, producer gas 23.6%, petroleum coke 18.7%, coke oven gas 5.9%, heavy oil 4.6%, and coal tar 1.3%. Relative to glass factories, using natural gas with relatively high calorific value and less impurities as fuel, the quality of glass produced under the same conditions is significantly better than that of glass production lines based on fossil fuels such as coal and petroleum coke. However, my country's natural gas mainly relies on external imports, and the supply of natural gas to production enterprises is not stable and the price is relatively high compared to other fuels. At present, most glass factories use pure single natural gas as fuel, which is not economically effective for enterprises.

[0003] In recent years, with the rapid increase in demand for natural gas and its repeated price increases, "coal to gas" projects have emerged in some areas, that is, using coal to produce natural gas, which can meet the requirements of glass companies to a certain extent. Summary of the invention

[0004] The purpose of the present invention is to provide an adjustable system and method for adjusting natural gas and coal gas for burning glass in view of the deficiencies in the prior art;

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention provides an adjustable system for burning natural gas and coal gas for glass, comprising: a natural gas main line, a coal gas main line, and a mixed gas line;

[0007] The gas outlet of the natural gas main pipeline is connected to the first gas inlet of the mixed gas pipeline, the gas outlet of the coal gas main pipeline is connected to the second gas inlet of the mixed gas pipeline, and the gas outlet of the mixed gas pipeline is connected to the gas inlet of the burner;

[0008] Wherein, the natural gas main line is provided with a first ball valve, a first flow meter, a natural gas regulating valve, a second ball valve, and a pneumatic ball valve in sequence and fixedly arranged along the natural gas flow direction;

[0009] Among them, the first rubber-lined butterfly valve, the second flow meter, the coal gas regulating valve, the second rubber-lined butterfly valve, the pneumatic butterfly valve, and the manual gate valve are fixedly arranged in sequence along the coal gas flow direction on the coal gas main line.

[0010] Furthermore, a natural gas bypass pipeline is fixedly arranged on the natural gas main pipeline, and a third ball valve is fixedly arranged on the natural gas bypass pipeline;

[0011] The inlet of the natural gas bypass pipeline is arranged between the inlet of the natural gas main pipeline and the first ball valve, and the outlet of the natural gas bypass pipeline is arranged between the inlet of the pneumatic ball valve and the second ball valve.

[0012] Furthermore, a coal gas bypass pipeline is fixedly arranged on the coal gas main pipeline, and a third rubber-lined butterfly valve is fixedly arranged on the coal gas bypass pipeline;

[0013] Among them, the inlet of the coal gas bypass pipeline is arranged between the inlet of the coal gas main pipeline and the first rubber lined butterfly valve, and the outlet of the coal gas bypass pipeline is arranged between the second rubber lined butterfly valve and the pneumatic butterfly valve.

[0014] Furthermore, the mixed gas pipeline includes: a plurality of branch pipes, and the branch pipes are provided with a first switch valve, a pneumatic valve, and a second switch valve in sequence from the inlet to the outlet.

[0015] Furthermore, a branch pipe bypass is fixedly provided on the branch pipe, and a third switch valve is fixedly provided on the branch pipe bypass;

[0016] The inlet of the branch pipe bypass is arranged between the inlet of the branch pipe and the first switch valve, and the outlet of the branch pipe bypass is arranged between the outlet of the branch pipe and the second switch valve.

[0017] Furthermore, the natural gas main pipeline, the coal gas main pipeline, and the mixed gas pipeline are all provided with pressure gauges.

[0018] A method for regulating the adjustable system of natural gas and coal gas for burning glass as described above, comprising the steps of:

[0019] Step 1: Open the first ball valve, the natural gas regulating valve, the second ball valve, and the pneumatic ball valve on the natural gas main line in sequence; or / and

[0020] Open the first rubber-lined butterfly valve, the coal gas regulating valve, the second rubber-lined butterfly valve, the pneumatic butterfly valve, and the manual gate valve on the coal gas main line in sequence;

[0021] Allowing natural gas and / or coal-based gas to enter the mixed gas pipeline;

[0022] Step 2: Open the first switch valve, the pneumatic valve, and the second switch valve on the branch pipe to send the gas into the small furnace combustion system for combustion.

[0023] Furthermore, the outlet pressure of the natural gas main pipeline is the same as the outlet pressure of the coal-to-gas main pipeline. The present invention adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0024] The present invention solves the problems of single natural gas fuel, high price and insufficient natural gas supply in the current production process of the glass industry. By using adjustable mixed combustion of natural gas and coal gas, the cost can be saved by % to %, thereby saving energy and reducing the emission of nitrogen oxides. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] The reference numerals in the accompanying drawings are:

[0027] Natural gas main line, 1; coal gas main line, 2; mixed gas line, 3; first ball valve, 4; first flow meter, 5; natural gas regulating valve, 6; second ball valve, 7; pneumatic ball valve, 8; first rubber-lined butterfly valve, 9; second flow meter, 10; coal gas regulating valve, 11; second rubber-lined butterfly valve, 17; pneumatic butterfly valve, 12; manual gate valve, 13; natural gas bypass line, 14; third ball valve, 15; coal gas bypass line, 16; third rubber-lined butterfly valve, 18; branch pipe, 22; first switch valve, 19; pneumatic valve, 20; second switch valve, 21; branch pipe bypass, 23; third switch valve, 24. DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention will be described in detail below.

[0029] Unless otherwise defined, technical or scientific terms used in the claims and the specification shall have the common meanings understood by persons having ordinary skills in the technical field to which the present invention belongs.

[0030] The words "include" or similar words used in the patent application specification and claims of the present invention mean that the items appearing before "include" include the items listed after "include" or their equivalents, and do not exclude other items.

[0031] The numerical values ​​mentioned in the present invention include all numerical values ​​that increase from low to high by one unit, assuming that there are at least two units between any lower value and the higher value. For example, if a component or a physical quantity is said to be from 1 to 100, 10 to 90 is more preferred, and 20 to 80 is the most preferred, it is intended to express that values ​​such as 5 to 95, 14 to 76, 23 to 67, 32 to 58, 41 to 49 are clearly listed in this specification; for values ​​less than 1, 0.0001, 0.001, 0.01 or 0.1 are considered to be more suitable as a unit. The above examples are for illustrative purposes only. In fact, all numerical combinations between the lowest value and the highest value listed are deemed to be clearly listed in this specification in a similar manner.

[0032] Example 1

[0033] This embodiment provides an adjustable system for burning natural gas and coal gas for glass, comprising: a natural gas main line 1, a coal gas main line 2, and a mixed gas line 3;

[0034] The gas outlet of the natural gas main line 1 is connected to the first gas inlet of the mixed gas pipeline 3, the gas outlet of the coal gas main line 2 is connected to the second gas inlet of the mixed gas pipeline 3, and the gas outlet of the mixed gas pipeline 3 is connected to the gas inlet of the burner;

[0035] The natural gas main pipeline 1 is provided with a first ball valve 4, a first flow meter 5, a natural gas regulating valve 6, a second ball valve 7, and a pneumatic ball valve 8 in sequence and fixedly arranged along the natural gas flow direction;

[0036] Among them, the first rubber-lined butterfly valve 9, the second flow meter 10, the coal gas regulating valve 11, the second rubber-lined butterfly valve 17, the pneumatic butterfly valve 12, and the manual gate valve 13 are fixedly arranged in sequence on the coal gas main pipeline 2 along the flow direction of the coal gas.

[0037] Wherein, a natural gas bypass pipeline 14 is fixedly arranged on the natural gas main pipeline 1, and a third ball valve 15 is fixedly arranged on the natural gas bypass pipeline 14;

[0038] The inlet of the natural gas bypass pipeline 14 is arranged between the inlet of the natural gas main pipeline 1 and the first ball valve 4 , and the outlet of the natural gas bypass pipeline 14 is arranged between the inlet of the pneumatic ball valve 8 and the second ball valve 7 .

[0039] Wherein, a coal gas bypass pipeline 16 is fixedly arranged on the coal gas main pipeline 2, and a third rubber-lined butterfly valve 18 is fixedly arranged on the coal gas bypass pipeline 16;

[0040] The inlet of the coal gas bypass pipeline 16 is arranged between the inlet of the coal gas main pipeline 2 and the first rubber lined butterfly valve 9 , and the outlet of the coal gas bypass pipeline 16 is arranged between the second rubber lined butterfly valve 17 and the pneumatic butterfly valve 12 .

[0041] The mixed gas pipeline 3 includes: a plurality of branch pipes 22 , and the branch pipes 22 are provided with a first switch valve 19 , a pneumatic valve 20 , and a second switch valve 21 in sequence from the inlet to the outlet.

[0042] Wherein, a branch pipe bypass 23 is fixedly arranged on the branch pipe 22, and a third switch valve 24 is fixedly arranged on the branch pipe bypass 23;

[0043] The inlet of the branch pipe bypass 23 is arranged between the inlet of the branch pipe 22 and the first switch valve 19 , and the outlet of the branch pipe bypass 23 is arranged between the outlet of the branch pipe 22 and the second switch valve 21 .

[0044] The natural gas main pipeline 1 , the coal gas main pipeline 2 , and the mixed gas pipeline 3 are all provided with pressure gauges.

[0045] Example 2

[0046] A method for regulating an adjustable system of natural gas and coal-fired gas for burning glass, the steps comprising:

[0047] Step 1: Open the first ball valve 4, the natural gas regulating valve 6, the second ball valve 7, and the pneumatic ball valve 8 on the natural gas main line 1 in sequence; or / and

[0048] Open the first rubber-lined butterfly valve 9, the coal gas regulating valve 11, the second rubber-lined butterfly valve 17, the pneumatic butterfly valve 12, and the manual gate valve 13 on the coal gas main pipeline 2 in sequence;

[0049] Allowing natural gas and / or coal-based gas to enter the mixed gas pipeline 3;

[0050] Step 2: Open the first switch valve 19, the pneumatic valve 20, and the second switch valve 21 on the branch pipe 22 to send the gas into the small furnace combustion system for combustion.

[0051] The outlet pressure of the natural gas main pipeline 1 is the same as the outlet pressure of the coal-to-gas main pipeline 2 .

[0052] In summary, the present invention solves the problems of single natural gas fuel, high price, insufficient natural gas supply, etc. in the current production process of the glass industry. By using adjustable mixed combustion of natural gas and coal gas, the cost can be saved by 5% to 15%, thereby saving energy and reducing the emission of nitrogen oxides.

[0053] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable system for burning natural gas and coal gas for glass, characterized in that: include: A natural gas main pipeline (1), a coal gas main pipeline (2), and a mixed gas pipeline (3); The gas outlet of the natural gas main pipeline (1) is connected to the first gas inlet of the mixed gas pipeline (3), the gas outlet of the coal gas main pipeline (2) is connected to the second gas inlet of the mixed gas pipeline (3), and the gas outlet of the mixed gas pipeline (3) is connected to the gas inlet of the burner; Wherein, a first ball valve (4), a first flow meter (5), a natural gas regulating valve (6), a second ball valve (7), and a pneumatic ball valve (8) are fixedly arranged in sequence on the natural gas main pipeline (1) along the natural gas flow direction; Wherein, a first rubber-lined butterfly valve (9), a second flow meter (10), a coal gas regulating valve (11), a second rubber-lined butterfly valve (17), a pneumatic butterfly valve (12), and a manual gate valve (13) are fixedly arranged in sequence on the coal gas main pipeline (2) along the flow direction of the coal gas.

2. The adjustable system for burning natural gas and coal gas for glass according to claim 1, characterized in that: A natural gas bypass pipeline (14) is fixedly arranged on the natural gas main pipeline (1), and a third ball valve (15) is fixedly arranged on the natural gas bypass pipeline (14); The inlet of the natural gas bypass pipeline (14) is arranged between the inlet of the natural gas main pipeline (1) and the first ball valve (4), and the outlet of the natural gas bypass pipeline (14) is arranged between the inlet of the pneumatic ball valve (8) and the second ball valve (7).

3. The adjustable system for burning natural gas and coal gas for glass according to claim 1, characterized in that: A coal gas bypass pipeline (16) is fixedly arranged on the coal gas main pipeline (2), and a third rubber-lined butterfly valve (18) is fixedly arranged on the coal gas bypass pipeline (16); The inlet of the coal gas bypass pipeline (16) is arranged between the inlet of the coal gas main pipeline (2) and the first rubber-lined butterfly valve (9), and the outlet of the coal gas bypass pipeline (16) is arranged between the second rubber-lined butterfly valve (17) and the pneumatic butterfly valve (12).

4. The adjustable system for burning natural gas and coal gas for glass according to claim 1, characterized in that: The mixed gas pipeline (3) comprises: a plurality of branch pipes (22), wherein the branch pipes (22) are provided with a first switch valve (19), a pneumatic valve (20), and a second switch valve (21) in sequence from an inlet to an outlet.

5. The adjustable system for burning natural gas and coal gas for glass according to claim 4, characterized in that: A branch pipe bypass (23) is fixedly arranged on the branch pipe (22), and a third switch valve (24) is fixedly arranged on the branch pipe bypass (23); The inlet of the branch pipe bypass (23) is arranged between the inlet of the branch pipe (22) and the first switch valve (19), and the outlet of the branch pipe bypass (23) is arranged between the outlet of the branch pipe (22) and the second switch valve (21).

6. The adjustable system for burning natural gas and coal gas for glass according to claim 1, characterized in that: The natural gas main pipeline (1), the coal gas main pipeline (2), and the mixed gas pipeline (3) are all provided with pressure gauges.

7. A method for regulating an adjustable system of natural gas and coal gas for burning glass as claimed in any one of claims 1 to 6, characterized in that the steps include: Step 1: Open the first ball valve (4), the natural gas regulating valve (6), the second ball valve (7), and the pneumatic ball valve (8) on the natural gas main line (1) in sequence; or / and Opening the first rubber-lined butterfly valve (9), the coal gas regulating valve (11), the second rubber-lined butterfly valve (17), the pneumatic butterfly valve (12), and the manual gate valve (13) on the coal gas main pipeline (2) in sequence; Allowing natural gas and / or coal-based gas to enter the mixed gas pipeline (3); Step 2: Open the first switch valve (19), the pneumatic valve (20), and the second switch valve (21) on the branch pipe (22) to send the gas into the small furnace combustion system for combustion.

8. The method for regulating the adjustable system of natural gas and coal gas for burning glass according to claim 7, characterized in that: The outlet pressure of the natural gas main pipeline (1) is the same as the outlet pressure of the coal-to-gas main pipeline (2).

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