CN210736674U - Full-automatic mixed gas calorific value quantitative control system - Google Patents
Full-automatic mixed gas calorific value quantitative control system Download PDFInfo
- Publication number
- CN210736674U CN210736674U CN201920960015.0U CN201920960015U CN210736674U CN 210736674 U CN210736674 U CN 210736674U CN 201920960015 U CN201920960015 U CN 201920960015U CN 210736674 U CN210736674 U CN 210736674U
- Authority
- CN
- China
- Prior art keywords
- gas
- valve
- pipeline
- tail
- tail gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007789 gas Substances 0.000 claims abstract description 423
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 216
- 230000001105 regulatory effect Effects 0.000 claims abstract description 118
- 239000003345 natural gas Substances 0.000 claims abstract description 108
- 239000000203 mixture Substances 0.000 claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 8
- 239000002737 fuel gas Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 9
- 229910002091 carbon monoxide Inorganic materials 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 3
- 239000005997 Calcium carbide Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000007363 regulatory process Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Feeding And Controlling Fuel (AREA)
Abstract
A full-automatic mixed gas calorific value quantitative control system comprises a tail gas pipeline, a natural gas pipeline, a gas mixer, a mixed gas pipeline, a first flow transmitter, a first regulating valve, a second flow transmitter, a second regulating valve and a first calorific value analyzer, wherein the tail gas pipeline is connected with the gas mixer, and the natural gas pipeline is connected with the gas mixer; the mixed gas pipeline is connected with the gas mixer; the first flow transmitter, the first regulating valve and the first heat value analyzer are arranged on the tail gas pipeline and are close to the gas mixer; the second flow rate transmitter and the second regulating valve are installed on the natural gas pipeline; the first regulating valve is matched with the second regulating valve and used for regulating the proportion of the tail gas and the natural gas entering the gas mixer. The problem of the tail gas that contains carbon monoxide unstable calorific value when carrying out the energy supply is solved, can also adjust in real time the calorific value of gas mixture.
Description
Technical Field
The utility model relates to a tail gas utilization field, more specifically relates to an industrial production in-process, retrieves a mixed gas calorific value ration control system that cyclic utilization in-process such as blast furnace gas, converter gas and carbide tail gas (CO) used.
Background
At present, tail gas generated by a blast furnace, a converter, a calcium carbide furnace and the like in the industrial production process contains a large amount of carbon monoxide, and the tail gas can be recycled in order to prevent the environment from being polluted when the tail gas is discharged to the atmosphere. However, the production load of production devices such as blast furnaces, converters, calcium carbide furnaces and the like is different in height or the recovery energy efficiency is different, so that the concentration of carbon monoxide in the recovered tail gas is suddenly high or low.
For example, the carbon monoxide concentration of the recovered tail gas is generally between 40% and 90%, so the calorific value of the tail gas during combustion is low, and the fluctuation is large, and the calorific value of the tail gas is generally between 1200Kcal/Kg and 2700 Kcal/Kg. In the process of industrial lime production, tail gas is used as fuel, and the overall kiln condition in the production process can be seriously influenced due to unstable heat value.
In industrial production, different production systems have different heat value requirements for gas fuel, and the systems with different heat value requirements are generally supplied with energy by adopting fuel with the same heat value. For example, high heating value fuels such as natural gas can provide energy to gas using devices with low heating value requirements, which can cause redundant heating values and waste of resources.
How to make the utilization of tail gas more convenient, overcome the unstable difficulty of tail gas calorific value to and can adjust the calorific value of gas to the gas consuming apparatus of different calorific value demands on this basis, be the problem that awaits solving.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the calorific value is unstable when tail gas containing carbon monoxide is used for energy supply; the problem of the gas supply calorific value redundancy of gas using devices with different calorific value requirements is solved.
In order to solve the above problems, the utility model provides a full-automatic mixed gas calorific value quantitative control system, including tail gas pipeline 1, natural gas pipeline 2, gas mixer 3, mixed gas pipeline 4, first flow transmitter 11, first governing valve 12, second flow transmitter 21, second governing valve 22, first calorific value analysis appearance 13, tail gas pipeline 1 with gas mixer 3 is connected for to gas mixer 3 carries tail gas; the natural gas pipeline 2 is connected with the gas mixer 3 and is used for conveying natural gas to the gas mixer 3; the gas mixer 3 is used for mixing the tail gas and the natural gas into mixed gas; the mixed gas pipeline 4 is connected with the gas mixer 3 and is used for conveying the mixed gas in the gas mixer 3 to a gas using device; the first flow transmitter 11 is installed on the exhaust gas pipeline 1 and used for detecting the flow of the exhaust gas; the first regulating valve 12 is installed on the exhaust pipeline 1 and used for regulating the flow of the exhaust; the first calorific value analyzer 13 is installed on the exhaust gas pipeline 1, is arranged close to the gas mixer 3, and is used for detecting the calorific value of the exhaust gas; the second flow transmitter 21 is installed on the natural gas pipeline 2 and used for detecting the flow of the natural gas; the second regulating valve 22 is installed on the natural gas pipeline 2 and is used for regulating the flow rate of the natural gas; the first regulating valve 12 is matched with the second regulating valve 22, and is used for regulating the proportion of the tail gas and the natural gas entering the gas mixer 3 according to the heat value of the tail gas detected by the first heat value analyzer 13.
According to an embodiment of the present invention, the system further comprises a controller 5, the controller 5 is electrically connected to the first regulating valve 12, the first flow rate transmitter 11, the first heat value analyzer 13, the second regulating valve 22, and the second flow rate transmitter 21, respectively, for regulating the first regulating valve 12 and the second regulating valve 22 according to the heat value requirement of the mixed gas, so as to regulate the flow rate of the tail gas and the natural gas.
According to an embodiment of the present invention, the system further comprises a second heat value analyzer 43, the second heat value analyzer 43 is installed on the mixed gas pipeline 4 for detecting the heat value of the mixed gas; the controller 5 is electrically connected to the second calorific value analyzer 43, and is configured to adjust the first regulating valve 12 and the second regulating valve 22 according to a detection result of the second calorific value analyzer 43.
According to an embodiment of the present invention, the system further comprises a third flow transmitter 41 and a third regulating valve 42, wherein the third flow transmitter 41 is installed on the mixed gas pipeline 4 and is used for detecting the flow of the mixed gas; the third regulating valve 42 is installed on the mixed gas pipeline 4 and is used for regulating the flow of the mixed gas; the controller 5 is electrically connected to the third flow transmitter 41 and the third regulating valve 42, respectively, and is configured to regulate the third regulating valve 42 according to the demand of the gas-using device.
According to an embodiment of the present invention, the system further comprises a tail gas evacuation pipeline 14, the tail gas evacuation pipeline 14 is installed on the tail gas pipeline 1, and is located between the first regulating valve 12 and the first heat value analyzer 13, for evacuating the gas in the tail gas pipeline 1.
According to an embodiment of the present invention, the system further comprises a first tail gas cut-off valve 15, a second tail gas cut-off valve 16, a first tail gas automatic cut-off valve 17, a tail gas check valve 18 and a second tail gas automatic cut-off valve 19 mounted on the tail gas exhaust pipe 1, wherein the first tail gas cut-off valve 15 is located at one end of the tail gas pipe 1 away from the gas mixer 3; the second tail gas shut-off valve 16 is positioned between the tail gas emptying pipeline 14 and the heat value analyzer; the first tail gas automatic cut-off valve 17 is positioned between the first regulating valve 12 and the tail gas emptying pipeline 14; the tail gas check valve 18 is located between the heating value analyzer and the gas mixer 3.
According to the utility model discloses an embodiment, the system still include nitrogen gas pipeline 6, nitrogen gas pipeline 6 through the nitrogen gas trip valve with tail gas pipeline 1 is connected, the hookup location is located respectively the both sides of first governing valve 12.
According to an embodiment of the present invention, the system further comprises a natural gas emptying pipe 24 installed on the natural gas pipe 2, the natural gas emptying pipe 24 is located between the second regulating valve 22 and the gas mixer 3, and is used for emptying the gas in the natural gas pipe 2.
According to an embodiment of the present invention, the system further comprises a first gas shut-off valve 25, a second gas shut-off valve 26, a first gas automatic shut-off valve 27, a natural gas check valve 28, a pressure reducing valve 29 and a second gas automatic shut-off valve 23 mounted on the natural gas emptying pipeline 24, wherein the first gas shut-off valve 25 is located at one end of the natural gas pipeline 2 away from the gas mixer 3; the second gas shutoff valve 26 is located between the natural gas evacuation pipe 24 and the gas mixer 3; the first automatic fuel gas shut-off valve 27 is positioned between the second regulating valve 22 and the natural gas emptying pipeline 24; the natural gas check valve 28 is located between the second gas shut-off valve 26 and the gas mixer 3; the pressure reducing valve 29 is located between the first gas shut-off valve 25 and the second regulating valve 22.
According to an embodiment of the present invention, the system further comprises a first mixed gas shutoff valve 45, a second mixed gas shutoff valve 46, a first mixed gas automatic shutoff valve 47, a mixed gas emptying pipeline 44 and a second mixed gas automatic shutoff valve 48 installed on the mixed gas emptying pipeline 44, wherein the first mixed gas shutoff valve 45 is located between the third regulating valve 42 and the gas mixer 3; the second mixed gas cut-off valve 46 is positioned at one end of the mixed gas pipeline 4 far away from the gas mixer 3; the first automatic mixed gas cut-off valve 47 is positioned between the third regulating valve 42 and the second mixed gas cut-off valve 46; the emptying pipeline is positioned between the first mixed gas automatic shut-off valve 47 and the second mixed gas shut-off valve 46.
According to one embodiment of the present invention, the gas mixer 3 includes a main body 31, a blowoff valve 32 disposed at the bottom of the main body 31, and a safety valve 33 disposed at the top of the main body 31.
According to the utility model discloses an embodiment, controller 5 is PLC automated control system.
The utility model discloses a tail gas pipeline and natural gas line set up jointly, adjust through the natural gas combustible gas content in the tail gas to obtain the gas mixture that has stable calorific value. Through first governing valve with the second governing valve cooperatees, and reasonable adjustment gets into proportion between tail gas and the natural gas in the gas mixer reaches the effect that the calorific value of mixed gas is in stable state on the one hand, and on the other hand reaches the effect that the mixed gas gained different calorific values, and the unstable problem of calorific value when having solved tail gas that contains carbon monoxide and carrying out the energy supply can also be adjusted in real time according to the different calorific value demands of different gas appliances the calorific value of mixed gas. The aim of guaranteeing the safe operation of the system is achieved by arranging the emptying pipeline and each valve group.
Drawings
FIG. 1 is a schematic diagram of a fully automatic mixed gas calorific value quantitative control system;
FIG. 2 is a schematic diagram of the electrical connections of the controller;
FIG. 3 is a schematic diagram of a second thermal value analyzer;
FIG. 4 is a schematic diagram of a third flow transmitter;
FIG. 5 is a schematic view of an exhaust evacuation line;
FIG. 6 is a schematic diagram of a nitrogen gas line;
FIG. 7 is a schematic view of a natural gas evacuation pipeline;
FIG. 8 is a schematic view of a valve assembly of the mixed gas conduit; and
fig. 9 is a schematic diagram of a gas mixer.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like elements and techniques of the present invention so that advantages and features of the present invention may be more readily understood when implemented in a suitable environment. The following description is an embodiment of the present invention, and other embodiments related to the claims that are not explicitly described also fall within the scope of the claims.
FIG. 1 shows a schematic diagram of a fully automatic mixed gas calorific value quantitative control system.
As shown in fig. 1, a full-automatic mixed gas calorific value quantitative control system comprises a tail gas pipeline 1, a natural gas pipeline 2, a gas mixer 3, a mixed gas pipeline 4, a first flow rate transmitter 11, a first regulating valve 12, a second flow rate transmitter 21, a second regulating valve 22 and a first calorific value analyzer 13, wherein the tail gas pipeline 1 is connected with the gas mixer 3 and is used for conveying tail gas to the gas mixer 3; the natural gas pipeline 2 is connected with the gas mixer 3 and is used for conveying natural gas to the gas mixer 3; the gas mixer 3 is used for mixing the tail gas and the natural gas into mixed gas; the mixed gas pipeline 4 is connected with the gas mixer 3 and is used for conveying the mixed gas in the gas mixer 3 to a gas using device; the first flow transmitter 11 is installed on the exhaust gas pipeline 1 and used for detecting the flow of the exhaust gas; the first regulating valve 12 is installed on the exhaust pipeline 1 and used for regulating the flow of the exhaust; the first calorific value analyzer 13 is installed on the exhaust gas pipeline 1, is arranged close to the gas mixer 3, and is used for detecting the calorific value of the exhaust gas; the second flow transmitter 21 is installed on the natural gas pipeline 2 and used for detecting the flow of the natural gas; the second regulating valve 22 is installed on the natural gas pipeline 2 and is used for regulating the flow rate of the natural gas; the first regulating valve 12 is matched with the second regulating valve 22, and is used for regulating the proportion of the tail gas and the natural gas entering the gas mixer 3 according to the heat value of the tail gas detected by the first heat value analyzer 13.
The tail gas conveyed by the tail gas pipeline 1 is tail gas containing carbon monoxide, and can also be tail gas containing other combustible gases. Because the concentration of carbon monoxide in the tail gas is unstable, lead to the unstability of calorific value, the utility model discloses a set up natural gas line 2 and tail gas line 1 and coexist, adjust through the natural gas combustible gas content in the tail gas to the acquisition has the gas mixture of stabilizing the calorific value. The tail gas and the natural gas are fully mixed in the gas mixer 3 to obtain mixed gas, and the mixed gas is conveyed to a gas using device along the mixed gas conveying pipeline.
The gas-using device can be any production device, different gas-using devices have different minimum requirements on heat values, and the mixed gas with lower heat value can meet the gas-using device with low heat value requirement, so that the consumption of natural gas can be reduced, and the production cost can be reduced.
The first flow rate transmitter 11 and the second flow rate transmitter 21 collect the flow rates of the tail gas and the natural gas in real time, and are used as references for adjusting the first adjusting valve 12 and the second adjusting valve 22.
The volume of the gas mixer 3 can be set according to actual production requirements, and meanwhile, the flow collected by the first flow transmitter 11 and the second flow transmitter 21 also needs to be matched with the volume of the gas mixer 3, so that the mixed gas keeps a certain pressure, and the stability of the heat value is further ensured.
The first regulating valve 12 is matched with the second regulating valve 22, namely the proportion between the tail gas and the natural gas entering the gas mixer 3 is reasonably regulated by regulating the opening degree of the first regulating valve 12 and/or the second regulating valve 22, so that the result that the heat value of the mixed gas is in a stable state is achieved.
The utility model discloses in, get into the flow of tail gas and natural gas in the gas blender 3 is through first governing valve 12 with second governing valve 22 controls, is used for satisfying gas blender 3 mixes the two into the pressure isoparametric of gas mixture. Meanwhile, the proportion of the tail gas and the natural gas entering the gas mixer 3 is also controlled by the first regulating valve 12 and the second regulating valve 22, and the purpose of controlling different heat values of the mixed gas is achieved by regulating the proportion of the tail gas and the natural gas.
The utility model discloses a first calorific value analysis appearance 13 survey the calorific value of tail gas, and the calorific value of natural gas is the constant value, 8400 (Kcal)/cubic meter, consequently, when needs keep the calorific value of gas mixture is constant, according to first calorific value analysis appearance 13 measuring result, the adjustment first governing valve 12 with the aperture of second governing valve 22 can obtain the gas mixture that has stable calorific value. For example, when the calorific value demand of the mixed fuel gas is 4000 (Kcal)/cubic meter, the calorific value of the offgas measured by the first calorific value analyzer 13 is 1200 (Kcal)/cubic meter, and the ratio of the input amount of the natural gas to the input amount of the offgas is 7:10, that is, the ratio of the flow rate of the offgas passing through the first regulating valve 12 to the flow rate of the natural gas passing through the second regulating valve 22 is 10: 7. Further, when the calorific value of the tail gas is changed, the calorific value of the mixed fuel gas can be always kept in a constant state by adjusting the first adjusting valve 12 and the second adjusting valve 22.
The utility model discloses can not only make the calorific value of mixed gas is in invariable state, can also be based on the demand of the different calorific values of mixed gas is adjusted. For example, different gas consumers may require different levels of heating value, some gas consumers may require higher heating values, and some gas consumers may require lower heating values. For gas utilization devices with lower heat value requirements, the provided mixed fuel gas can reduce the heat value appropriately. For example, the calorific value of a certain gas plant may be up to 3000 (Kcal)/cubic meter, and the ratio of the input amount of natural gas to the input amount of tail gas is 1:3 when the calorific value of the tail gas is 1200 (Kcal)/cubic meter. That is, the amount of natural gas having a high heating value can be reduced with respect to a gas-using plant having a heating value demand of 4000 (Kcal)/cubic meter.
Fig. 2 shows a schematic diagram of the electrical connections of the controller.
As shown in fig. 2, the system further comprises a controller 5, wherein the controller 5 is electrically connected with the first regulating valve 12, the first flow rate transmitter 11, the first heat value analyzer 13, the second regulating valve 22 and the second flow rate transmitter 21 respectively, and is used for regulating the first regulating valve 12 and the second regulating valve 22 according to the heat value requirement of the mixed fuel gas, so as to regulate the flow rate of the tail gas and the natural gas.
The controller 5 obtains the flow rate of the tail gas through the first flow rate transmitter 11, obtains the current opening degree of the first regulating valve 12 through the first regulating valve 12, obtains the current calorific value of the tail gas through the first calorific value analyzer 13, obtains the flow rate of the natural gas through the second flow rate transmitter 21, and obtains the current opening degree of the second regulating valve 22 through the second regulating valve 22. The first regulating valve 12 and the second regulating valve 22 can be adjusted in real time through calculation according to the preset or real-time input heat value requirement of the mixed gas, so that the mixed gas value is constant. And the constant value of the mixed gas value can be adjusted in real time according to the requirement.
The controller 5 can be various existing or future utility model automated operation systems, the utility model discloses preferred PLC automated control system.
Fig. 3 shows a schematic diagram of a second calorific value analyzer.
As shown in fig. 3, the system further includes a second calorific value analyzer 43, the second calorific value analyzer 43 being installed on the mixed gas pipeline 4 to detect a calorific value of the mixed gas; the controller 5 is electrically connected to the second calorific value analyzer 43, and is configured to adjust the first regulating valve 12 and the second regulating valve 22 according to a detection result of the second calorific value analyzer 43.
The utility model discloses in, when using the gas unit fixed, promptly the calorific value demand of mixed gas is fixed, nevertheless because the calorific value of tail gas is unstable reason or other reasons, when the calorific value that leads to mixed gas appears the deviation for above-mentioned calorific value demand, controller 5 passes through second calorific value analysis appearance 43 acquires in real time the calorific value of mixed gas to compare with the calorific value demand, when appearing the deviation, according to the size of deviation, it is right first governing valve 12 with second governing valve 22 finely tunes, constantly rectifies, further guarantees that the calorific value of mixed gas satisfies the demand of using the gas unit.
Fig. 4 shows a schematic diagram of a third flow transmitter.
As shown in fig. 4, the system further includes a third flow transmitter 41 and a third regulating valve 42, wherein the third flow transmitter 41 is installed on the mixed gas pipeline 4 and is used for detecting the flow of the mixed gas; the third regulating valve 42 is installed on the mixed gas pipeline 4 and is used for regulating the flow of the mixed gas; the controller 5 is electrically connected to the third flow transmitter 41 and the third regulating valve 42, respectively, and is configured to regulate the third regulating valve 42 according to the demand of the gas-using device.
The third regulating valve 42 is regulated by firstly calculating the standard flow of the mixed gas required by the gas using device through the manually given required value of the heat value of the mixed gas and the required heat consumption of the gas using device, and the standard flow is used as the regulating reference value of the third regulating valve 42. In the adjusting process, the actual flow (the value obtained by temperature and pressure compensation calculation) measured by the third flow transmitter is compared with the reference value to control the opening of the third adjusting valve 42, so as to control the gas flow in the mixed gas pipeline 4.
The artificially given mixed gas heat value refers to the artificially set heat value amount meeting the minimum heat value requirement of the gas using device, namely the heat value amount can be larger than the minimum required heat value of the gas using device.
The standard flow rate will be different because the required heat consumption is different according to the different gas-using devices or the different production loads of the gas-using devices. The reference value for the adjustment of the third adjustment valve 42, which can be processed by manual input, can thus be adjusted for different production loads.
Meanwhile, the third flow transmitter 41 and the third regulating valve 42 are also electrically connected to the controller 5.
The first regulating valve 12 calculates the proportion of the premixed tail gas flow to the standard mixed gas flow required by the gas using device according to the control parameters of the third regulating valve 42, and then calculates an adjusting reference value of the first regulating valve 12 according to the tail gas flow proportion, and the actual flow (value obtained by temperature and pressure compensation calculation) measured by the first flow transmission instrument in the adjusting process is compared with the reference value to control the opening of the first regulating valve 12, so as to control the gas flow in the tail gas pipeline 1.
The second regulating valve 22 calculates the proportion of the premixed natural gas flow in the standard mixed gas flow required by the mixed gas using device according to the control parameter of the third regulating valve 42, then calculates the regulating reference value of the second regulating valve 22 according to the natural gas flow proportion, and compares the actual flow (the value obtained by temperature and pressure compensation calculation) measured by the second flow transmission instrument with the reference value in the regulating process to control the opening degree of the second regulating valve 22, thereby controlling the gas flow in the mixed natural gas pipeline 2.
Fig. 5 shows a schematic view of an exhaust evacuation line.
As shown in fig. 5, the system further includes a tail gas exhaust pipeline 14, wherein the tail gas exhaust pipeline 14 is installed on the tail gas pipeline 1, is located between the first regulating valve 12 and the first calorific value analyzer 13, and is used for exhausting gas in the tail gas pipeline 1.
In order to guarantee safety when tail gas pipeline 1 carries tail gas, the utility model discloses set up the evacuation pipeline on the tail gas pipeline for will under emergency the tail gas evacuation in the tail gas pipeline is handled.
As shown in fig. 5, the system further includes a first tail gas cut-off valve 15, a second tail gas cut-off valve 16, a first tail gas automatic cut-off valve 17, a tail gas check valve 18 and a second tail gas automatic cut-off valve 19 mounted on the tail gas exhaust pipeline 1, wherein the first tail gas cut-off valve 15 is located at one end of the tail gas pipeline 1 far away from the gas mixer 3; the second tail gas shut-off valve 16 is positioned between the tail gas emptying pipeline 14 and the heat value analyzer; the first tail gas automatic cut-off valve 17 is positioned between the first regulating valve 12 and the tail gas emptying pipeline 14; the tail gas check valve 18 is located between the heating value analyzer and the gas mixer 3.
In order to guarantee safety when tail gas pipeline 1 carries tail gas, it is further set up first tail gas trip valve 15, second tail gas trip valve 16 and first tail gas automatic shut-off valve 17 on the tail gas pipeline 1 for at first under emergency 1 each section of tail gas pipeline cuts, avoids endangering the safety of whole pipeline. Each of the shut-off valves may be electrically connected to the controller 5. For example: the second exhaust gas cut-off valve 16 and the first exhaust gas cut-off valve 15 may be closed first, and after the exhaust gas is exhausted, the first exhaust gas automatic cut-off valve 17 may be closed. Or other sequential closing order.
Figure 6 shows a schematic of the nitrogen line.
As shown in fig. 6, the system further includes a nitrogen pipeline 6, the nitrogen pipeline 6 is connected to the exhaust pipeline 1 through a nitrogen shut-off valve, and the connection positions are respectively located at two sides of the first regulating valve 12.
In order to guarantee safety when tail gas pipeline 1 carries tail gas, it is further, set up inert gas protection pipeline, the utility model discloses well inert gas selects nitrogen gas. In emergency, carry nitrogen gas to exhaust pipeline 1 in, open the evacuation pipeline simultaneously, avoid the pipeline to receive harm.
Preferably, the nitrogen pipeline 6 with the tail gas pipeline 1 sets up many places and is connected, with first tail gas trip valve 15, second tail gas trip valve 16 and first tail gas automatic shut-off valve 17 mutually support, and the segmentation is handled nitrogen gas in the tail gas pipeline 1.
Fig. 7 shows a schematic view of a natural gas evacuation pipeline.
As shown in fig. 7, the system further includes a natural gas evacuation pipeline 24 installed on the natural gas pipeline 2, wherein the natural gas evacuation pipeline 24 is located between the second regulating valve 22 and the gas mixer 3, and is used for evacuating gas in the natural gas pipeline 2.
In order to guarantee safety when 2 natural gas line carry tail gas, the utility model discloses natural gas line is last to set up the evacuation pipeline for will under emergency natural gas evacuation among the natural gas line handles.
As shown in fig. 7, the system further comprises a first gas shut-off valve 25, a second gas shut-off valve 26, a first gas automatic shut-off valve 27, a natural gas check valve 28, a pressure reducing valve 29 and a second gas automatic shut-off valve 23 mounted on the natural gas emptying pipeline 24, wherein the first gas shut-off valve 25 is located at one end of the natural gas pipeline 2 far away from the gas mixer 3; the second gas shutoff valve 26 is located between the natural gas evacuation pipe 24 and the gas mixer 3; the first automatic fuel gas shut-off valve 27 is positioned between the second regulating valve 22 and the natural gas emptying pipeline 24; the natural gas check valve 28 is located between the second gas shut-off valve 26 and the gas mixer 3; the pressure reducing valve 29 is located between the first gas shut-off valve 25 and the second regulating valve 22.
In order to guarantee the safety of natural gas pipeline 2 when carrying the natural gas, further set up first natural gas trip valve, second natural gas trip valve and first natural gas automatic cutout valve on natural gas pipeline 2 for at first will under emergency natural gas pipeline 2 each section cut, avoid endangering the safety of whole pipeline. Each of the shut-off valves may be electrically connected to the controller 5. For example: the second natural gas shut-off valve and the first natural gas shut-off valve may be closed first, the tail gas may be exhausted, and then the first natural gas automatic shut-off valve may be closed, or other sequence of closing may be adopted.
The same as the tail gas pipeline 1, a nitrogen pipeline 6 can be arranged beside the natural gas pipeline 2 or the tail gas pipeline 1 shares the same group of nitrogen pipelines 6 to protect the natural gas pipeline 2 to run safely.
Fig. 8 shows a schematic view of a valve assembly of a mixed gas pipeline.
As shown in fig. 8, the system further includes a first mixed gas shutoff valve 45, a second mixed gas shutoff valve 46, a first mixed gas automatic shutoff valve 47, a mixed gas emptying pipe 44 and a second mixed gas automatic shutoff valve 48 mounted on the mixed gas emptying pipe 44, the first mixed gas shutoff valve 45 is located between the third regulating valve 42 and the gas mixer 3; the second mixed gas cut-off valve 46 is positioned at one end of the mixed gas pipeline 4 far away from the gas mixer 3; the first automatic mixed gas cut-off valve 47 is positioned between the third regulating valve 42 and the second mixed gas cut-off valve 46; the emptying pipeline is positioned between the first mixed gas automatic shut-off valve 47 and the second mixed gas shut-off valve 46.
With the effect that each valve setting on the tail gas pipeline 1 was the same, first gas mixture shutoff valve 45, second gas mixture shutoff valve 46, first gas mixture automatic cutout valve 47, gas mixture evacuation pipeline 44 and installing second gas mixture automatic cutout valve 48 on the gas mixture evacuation pipeline 44 is also for the guarantee the operation safety of gas mixture pipeline 4.
Fig. 9 shows a schematic view of a gas mixer.
As shown in fig. 9, the gas mixer 3 includes a main body 31, a blow-off valve 32 provided at the bottom of the main body 31, and a safety valve 33 provided at the top of the main body 31.
According to the utility model discloses an embodiment, controller 5 is PLC automated control system.
The utility model discloses a tail gas pipeline and natural gas line set up jointly, adjust through the natural gas combustible gas content in the tail gas to obtain the gas mixture that has stable calorific value. Through first governing valve with the second governing valve cooperatees, and reasonable adjustment gets into proportion between tail gas and the natural gas in the gas mixer reaches the effect that the calorific value of mixed gas is in stable state on the one hand, and on the other hand reaches the effect that the mixed gas gained different calorific values, and the unstable problem of calorific value when having solved tail gas that contains carbon monoxide and carrying out the energy supply can also be adjusted in real time according to the different calorific value demands of different gas appliances the calorific value of mixed gas. The aim of guaranteeing the safe operation of the system is achieved by arranging the emptying pipeline and each valve group.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Claims (10)
1. A full-automatic mixed gas calorific value quantitative control system is characterized by comprising a tail gas pipeline (1), a natural gas pipeline (2), a gas mixer (3), a mixed gas pipeline (4), a first flow transmitter (11), a first regulating valve (12), a second flow transmitter (21), a second regulating valve (22) and a first calorific value analyzer (13),
the tail gas pipeline (1) is connected with the gas mixer (3) and is used for conveying tail gas to the gas mixer (3);
the natural gas pipeline (2) is connected with the gas mixer (3) and is used for conveying natural gas to the gas mixer (3);
the gas mixer (3) is used for mixing the tail gas and the natural gas into mixed gas;
the mixed gas pipeline (4) is connected with the gas mixer (3) and is used for conveying the mixed gas in the gas mixer (3) to a gas using device;
the first flow transmitter (11) is arranged on the tail gas pipeline (1) and is used for detecting the flow of the tail gas;
the first regulating valve (12) is arranged on the tail gas pipeline (1) and is used for regulating the flow of the tail gas;
the first heat value analyzer (13) is arranged on the tail gas pipeline (1), is close to the gas mixer (3), and is used for detecting the heat value of the tail gas;
the second flow transmitter (21) is arranged on the natural gas pipeline (2) and is used for detecting the flow of the natural gas;
the second regulating valve (22) is arranged on the natural gas pipeline (2) and is used for regulating the flow of the natural gas;
the first adjusting valve (12) is matched with the second adjusting valve (22) and used for adjusting the proportion of the tail gas and the natural gas entering the gas mixer (3) according to the heat value of the tail gas detected by the first heat value analyzer (13).
2. The system according to claim 1, further comprising a controller (5),
the controller (5) is respectively electrically connected with the first regulating valve (12), the first flow transducer (11), the first heat value analyzer (13), the second regulating valve (22) and the second flow transducer (21) and is used for regulating the first regulating valve (12) and the second regulating valve (22) according to the heat value requirement of the mixed fuel gas so as to regulate the flow of the tail gas and the natural gas.
3. The system of claim 2, further comprising a second thermal value analyzer (43),
the second heat value analyzer (43) is arranged on the mixed gas pipeline (4) and is used for detecting the heat value of the mixed gas;
the controller (5) is electrically connected with the second heat value analyzer (43) and is used for adjusting the first adjusting valve (12) and the second adjusting valve (22) according to the detection result of the second heat value analyzer (43).
4. A system according to claim 3, further comprising a third flow transmitter (41) and a third regulating valve (42),
the third flow transmitter (41) is arranged on the mixed gas pipeline (4) and is used for detecting the flow of the mixed gas;
the third regulating valve (42) is arranged on the mixed gas pipeline (4) and is used for regulating the flow of the mixed gas;
the controller (5) is respectively electrically connected with the third flow transmitter (41) and the third regulating valve (42) and is used for regulating the third regulating valve (42) according to the requirement of a gas-using device.
5. The system according to claim 1, further comprising an exhaust evacuation conduit (14),
the tail gas evacuation pipeline (14) is installed on the tail gas pipeline (1), is located between the first regulating valve (12) and the first heat value analyzer (13), and is used for evacuating gas in the tail gas pipeline (1).
6. The system according to claim 5, further comprising a first tail gas shut-off valve (15), a second tail gas shut-off valve (16), a first tail gas automatic shut-off valve (17), a tail gas check valve (18) mounted on the tail gas pipeline (1), and a second tail gas automatic shut-off valve (19) mounted on the tail gas emptying pipeline (14),
the first tail gas stop valve (15) is positioned at one end of the tail gas pipeline (1) far away from the gas mixer (3);
the second tail gas shut-off valve (16) is positioned between the tail gas emptying pipeline (14) and the heat value analyzer;
the first tail gas automatic cut-off valve (17) is positioned between the first regulating valve (12) and the tail gas emptying pipeline (14);
the tail gas check valve (18) is located between the calorific value analyzer and the gas mixer (3).
7. System according to claim 1, further comprising a nitrogen gas duct (6),
the nitrogen pipeline (6) is connected with the tail gas pipeline (1) through a nitrogen stop valve, and the connecting positions are respectively positioned on two sides of the first regulating valve (12).
8. The system according to claim 1, further comprising a natural gas evacuation line (24) mounted on the natural gas pipeline (2), the natural gas evacuation line (24) being located between the second regulating valve (22) and the gas mixer (3) for evacuating gas in the natural gas pipeline (2).
9. System according to claim 8, characterized in that it further comprises a first gas shut-off valve (25), a second gas shut-off valve (26), a first gas automatic shut-off valve (27), a natural gas check valve (28), a pressure reducing valve (29) mounted on the natural gas pipeline (2), and a second gas automatic shut-off valve (23) mounted on the natural gas emptying pipeline (24),
the first gas stop valve (25) is positioned at one end of the natural gas pipeline (2) far away from the gas mixer (3);
the second gas shutoff valve (26) is located between the natural gas evacuation pipe (24) and the gas mixer (3);
the first automatic fuel gas cut-off valve (27) is positioned between the second regulating valve (22) and the natural gas emptying pipeline (24);
the natural gas check valve (28) is located between the second gas shut-off valve (26) and the gas mixer (3);
the pressure reducing valve (29) is located between the first gas shut-off valve (25) and the second regulating valve (22).
10. System according to claim 4, characterized by further comprising a first mixture shutoff valve (45), a second mixture shutoff valve (46), a first automatic mixture shutoff valve (47), a mixed gas emptying pipe (44) and a second automatic mixed gas shutoff valve (48) mounted on the mixed gas emptying pipe (44) mounted on the mixed gas pipe (4),
the first mixture shutoff valve (45) is located between the third regulating valve (42) and the gas mixer (3);
the second mixed gas cut-off valve (46) is positioned at one end of the mixed gas pipeline (4) far away from the gas mixer (3);
the first mixed gas automatic cut-off valve (47) is positioned between the third regulating valve (42) and the second mixed gas cut-off valve (46);
the emptying pipeline is positioned between the first mixed gas automatic cut-off valve (47) and the second mixed gas cut-off valve (46).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920960015.0U CN210736674U (en) | 2019-06-25 | 2019-06-25 | Full-automatic mixed gas calorific value quantitative control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920960015.0U CN210736674U (en) | 2019-06-25 | 2019-06-25 | Full-automatic mixed gas calorific value quantitative control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210736674U true CN210736674U (en) | 2020-06-12 |
Family
ID=70981520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920960015.0U Active CN210736674U (en) | 2019-06-25 | 2019-06-25 | Full-automatic mixed gas calorific value quantitative control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210736674U (en) |
-
2019
- 2019-06-25 CN CN201920960015.0U patent/CN210736674U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103148473B (en) | Optimal operation method and system for utility boiler based on CO | |
| US20160354742A1 (en) | System and method for blending biogas | |
| CN108278622B (en) | Ultra-clean furnace for waste gas treatment and waste gas treatment method | |
| CN111503655A (en) | Combustion control method and system based on smoke multi-component detection | |
| CN102748774B (en) | Burning furnace, burning control method and burning control device | |
| CN102937382B (en) | Adjusting and optimizing method of ratio-controlled combustion system | |
| CN108729966A (en) | Gas heat storage oxidation safety guarantee system | |
| CN204630407U (en) | Temperature control device and heating furnace system | |
| CN210736674U (en) | Full-automatic mixed gas calorific value quantitative control system | |
| CN206958963U (en) | A kind of kiln burning control system | |
| CN110243174A (en) | A kind of Atmosphere Control in Ceramic Roller's kiln method, apparatus and storage medium | |
| CN111963342A (en) | Leading hybrid system of low concentration gas | |
| CN105509036B (en) | Pulverized coal boiler pure oxygen burning system of the nitrogen-free without CO2 emission | |
| US11053845B2 (en) | Combustion device and gas turbine | |
| CN217635103U (en) | Accurate control device for natural gas hydrogen-doping proportion | |
| CN201507945U (en) | Control, regulation and remote monitoring system for fuel/gas boilers | |
| CN209655295U (en) | A kind of double gas combustion apparatus | |
| CN102032588B (en) | Controlling, adjusting and remote monitoring system for fuel gas-fired boiler | |
| CN206459507U (en) | One kind sintering oxygen enrichment system | |
| CN207230598U (en) | Oxygen-enriched combustion system of generator set | |
| CN205670267U (en) | Coal gas of converter and natural gas mixed control apparatus | |
| CN115342639A (en) | Automatic temperature control device and method for oxygen-enriched ignition in sintering | |
| US20110036279A1 (en) | NOx reduction control system for boilers | |
| CN210229590U (en) | Supply device for denitration reducing gas in coke oven | |
| CN112797440A (en) | Oxygen-enriched combustion control system of heating furnace and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Qinghai Salt Lake Haina Chemical Co.,Ltd. Assignor: QINGHAI SALT LAKE INDUSTRY Co.,Ltd. Contract record no.: X2023990000997 Denomination of utility model: A fully automatic mixed gas calorific value quantitative control system Granted publication date: 20200612 License type: Exclusive License Record date: 20240102 |
|
| EE01 | Entry into force of recordation of patent licensing contract |