Flue gas diluting and sampling device

Abstract

The utility model discloses a flue gas diluting and sampling device, which relates to the technical field of flue gas diluting and sampling, and is characterized in that a diluting module comprises a sintering filter element, a sound speed small hole, a sealing gasket, a nozzle, a shrinkage hole, a four-way joint and a stainless steel pipe; according to the design, diluent gas with certain pressure enters the nozzle and then enters the shrinkage pipe, negative pressure is generated at the moment, smoke is sucked into the four-way connector to be mixed with the diluent gas, and then the mixture enters the analyzer to be measured; after the device is adopted, high-concentration flue gas can be diluted by 100 times and then enters a high-precision analyzer to be measured, the concentration of measured gas in the flue gas is greatly reduced after dilution, dust, humidity and the like are also greatly reduced, and the loss of the measured gas caused by the dust and the humidity can be reduced, so that the measurement precision of the system is improved, and the maintenance amount of the system is also reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas dilution sampling technical field especially, relate to a flue gas dilution sampling device. BACKGROUND

[0002] ‌In the process of continuous detection of flue gas emission, since most of the fixed pollution sources have been modified for dust removal and desulfurization, the emitted pollutants have the characteristics of low concentration, high humidity, strong corrosion, complex and unstable desulfurization byproducts, etc., which causes certain difficulty in actual measurement.

[0003] Whether sampling from the flue or sampling from the chimney, once the flue gas leaves the flue (chimney) and enters the sampling system, if not corresponding technical treatment is carried out, the water vapor in the flue gas will condense due to the decrease of flue gas temperature (from the original 150℃~300℃ to below 100℃), the flue dust combines with water vapor to form viscous material, which blocks the sampling probe and pipeline, or the gaseous pollutants (especially sulfur dioxide) are absorbed by water, which affects the measurement result, therefore, the utility model provides a flue gas dilution sampling device. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a flue gas dilution sampling device, which solves the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a flue gas dilution sampling device, comprising a sampling rod, a side of the sampling rod is provided with an asbestos pad and an air inlet pipe module, a side of the air inlet pipe module is provided with a machine box, a side of the air inlet pipe module is connected with a gas guide pipe module, first and second O-shaped rings are arranged between the air inlet pipe module and the gas guide pipe module, an end of the gas guide pipe module is connected with a locking mechanism, a bottom of the air inlet pipe module is provided with a double-jacket outer tooth side tee joint, a dilution module and a double-jacket pipe joint, an outer side of the dilution module is provided with a second stainless steel pipe, a double-jacket through plate joint and a double-jacket right-angle joint.

[0006] As a further technical scheme of the utility model, the sampling rod comprises a joint, a sampling pipe is installed in the middle of the joint, the air inlet pipe module comprises a connecting flange, an air inlet pipe connected with the outer side of the connecting flange and an installation assembly.

[0007] As a further technical scheme of the utility model, the gas guide pipe module comprises a spherical screw, a filter, a connecting rod arranged in the middle of the filter, a gas guide seat connected with a side of the filter and a first sealing gasket arranged at the connecting position of the gas guide seat and the filter.

[0008] As a further technical scheme of the utility model, the locking mechanism comprises a connecting seat, a lead screw connected to one side of the connecting seat, an automatic adjusting assembly connected to the end of the lead screw, and a clamping block arranged outside the lead screw.

[0009] As a further technical scheme of the utility model, the dilution module comprises a four-way joint, a first stainless steel pipe connected to the outside of the four-way joint, a sintered filter element, an acoustic speed orifice, a second sealing gasket, a nozzle, and a contraction hole.

[0010] As a further technical scheme of the utility model, the mounting assembly comprises a plug post, an inner cavity, a moving slot and a limiting slot are formed in the middle of the plug post, the moving slot and the limiting slot are connected, the number of the limiting slots and the moving slots is twice the number of the plug posts, and a main pull rope is adaptively connected to the middle of the inner cavity.

[0011] As a further technical scheme of the utility model, the end of the main pull rope is connected with a pull block, the pull block is in a cylindrical structure, the other end of the main pull rope is connected with a secondary pull rope, the end of the secondary pull rope is connected with an auxiliary plate, the auxiliary plate is adapted to the limiting slot, a limiting block and a supporting spring are fixedly connected to the outside of the auxiliary plate, the limiting block is adapted to the moving slot, and the number of the supporting springs is equal to the number of the limiting blocks.

[0012] As a further technical scheme of the utility model, the automatic adjusting assembly comprises an auxiliary frame, a driving motor is mounted to the outside of the auxiliary frame, an installation plate is arranged between the driving motor and the auxiliary frame, the installation plate is connected to the auxiliary frame through bolts, the output end of the driving motor is fixedly connected with a threaded column, the outside of the lead screw is fixedly connected with a threaded block, and the threaded column is engaged with the threaded block.

[0013] The utility model provides a kind of flue gas dilution sampling device.Compared with prior art, it has the following beneficial effects:

[0014] 1, the design a kind of flue gas dilution sampling device, by the setting of dilution module, gas can enter flue gas dilution sampling device with very low flow, compared with the intake of direct extraction system is low two orders of magnitude.It means that only a little moisture to remove and a little particulate matter to filter.Because of low airflow velocity, particulate matter basically flows with flue gas instead of entering flue gas dilution sampling device.Greatly reduce the problem caused by humidity and particulate matter interference to instrument, reduce a lot of failure;Small amount of air extraction, improve the service time of filter, reduce maintenance workload;Gas is transported under positive pressure, pipeline leakage has less impact on measurement;Dilution reduces the moisture content, so that the dew point of flue gas drops to-29~-40℃, without heating sampling tube and cooler;It can dilute high-concentration gas to the appropriate concentration measurement range of analytical instrument;Improve system measurement accuracy, reduce routine maintenance.

[0015] 2、The design of a flue gas dilution sampling device, by setting the installation assembly between the connecting flange and the machine case, when installing between the machine case and the connecting flange, the user will pull the pull block to drive the main pull rope, the auxiliary plate and the limit block to move to the inside of the moving groove, when the connecting flange is in contact with the machine case, the pull block is loosened, under the elastic potential of the supporting spring, the auxiliary plate and the limit block are extruded, the outside of the insert post is extended, the insert post is clamped in the reserved hole, and the remaining insert posts are fixed in the same way, which is simple in structure, convenient in operation, time-saving and labor-saving in installation, and improves the installation efficiency of the air inlet pipe module.

[0016] 3、The design of a flue gas dilution sampling device, by setting the automatic adjusting assembly, when the lead screw needs to be adjusted, under the support of the auxiliary frame, the driving motor is connected with the auxiliary frame through the mounting plate, the driving motor is started, the output end of the driving motor drives the threaded column to rotate, and then meshes with the threaded block, so that the threaded block drives the lead screw to rotate, thereby the locking operation of the subsequent air guide pipe module can be performed, which is simple in structure, convenient in operation, time-saving and labor-saving. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural diagram of a flue gas dilution sampling device;

[0018] Figure 2 It is a side view of a flue gas dilution sampling device;

[0019] Figure 3 It is a partial side view of a sampling tube in a flue gas dilution sampling device;

[0020] Figure 4 It is a partial side view of an air inlet pipe module in a flue gas dilution sampling device;

[0021] Figure 5 It is a partial side view of a flue gas dilution sampling device Figure 4 It is an enlarged view of A in a flue gas dilution sampling device;

[0022] Figure 6 It is a partial side view of an air guide pipe module in a flue gas dilution sampling device;

[0023] Figure 7 It is a partial side view of a locking mechanism in a flue gas dilution sampling device;

[0024] Figure 8 It is a partial side view of a dilution module in a flue gas dilution sampling device.

[0025] In the figure: 1, sampling rod; 1001, joint; 1002, sampling tube; 2, asbestos pad; 3, air inlet pipe module; 31, connecting flange; 32, air inlet pipe; 33, mounting assembly; 331, insertion column; 332, inner cavity; 333, moving groove; 334, limiting groove; 335, main pull rope; 336, pull block; 337, auxiliary pull rope; 338, auxiliary plate; 339, limiting block; 3310, supporting spring; 4, case; 5, first O-ring; 6, second O-ring; 7, air guide pipe module; 71, spherical screw; 72, filter; 73, connecting rod; 74, first gasket; 75, air guide seat; 8, locking mechanism; 81, connecting seat; 82, clamping block; 83, automatic adjusting assembly; 831, auxiliary frame; 832, drive motor; 833, mounting plate; 834, threaded column; 835, threaded block; 84, lead screw; 9, double-clamping sleeve outer tooth side tee joint; 10, dilution module; 101, sintered filter element; 102, sonic orifice; 103, second gasket; 104, nozzle; 105, contraction hole; 106, four-way joint; 107, first stainless steel pipe; 11, second stainless steel pipe; 12, double-clamping sleeve plate-through joint; 13, double-clamping sleeve pipe joint; 14, double-clamping sleeve right-angle joint. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Please refer to Figures 1-8 The present application provides a flue gas dilution sampling device technical scheme: a flue gas dilution sampling device, comprising a sampling rod 1, one side of the sampling rod 1 is provided with an asbestos pad 2 and an air inlet pipe module 3, one side of the air inlet pipe module 3 is provided with a case 4, one side of the air inlet pipe module 3 is connected with an air guide pipe module 7, a first O-ring 5 and a second O-ring 6 are arranged between the air inlet pipe module 3 and the air guide pipe module 7, an end of the air guide pipe module 7 is connected with a locking mechanism 8, the bottom of the air inlet pipe module 3 is provided with a double-clamping sleeve outer tooth side tee joint 9, a dilution module 10 and a double-clamping sleeve pipe joint 13, the outer side of the dilution module 10 is provided with a second stainless steel pipe 11, a double-clamping sleeve plate-through joint 12 and a double-clamping sleeve right-angle joint 14.

[0028] As Figures 2-3As shown, the sampling rod 1 comprises a joint 1001, and a sampling tube 1002 is arranged at the middle of the joint 1001, and the air inlet pipe module 3 comprises a connecting flange 31, an air inlet pipe 32 connected outside the connecting flange 31 and an installation assembly 33, thereby facilitating the installation of the sampling rod 1 and the air inlet pipe module 3.

[0029] As shown in the Figure 2 , Figure 6 , the air guide pipe module 7 comprises a spherical screw 71, a filter 72, a connecting rod 73 arranged at the middle of the filter 72, an air guide seat 75 connected to one side of the filter 72 and a first sealing gasket 74 arranged at the connecting position of the air guide seat 75 and the filter 72, thereby facilitating the air guiding of the air guide pipe module 7.

[0030] As shown in the Figures 7-8 , Figures 4-5 , the locking mechanism 8 comprises a connecting seat 81, a lead screw 84 connected to one side of the connecting seat 81, an automatic adjusting assembly 83 connected to the end of the lead screw 84, clamping blocks 82 arranged outside the lead screw 84, the dilution module 10 comprises a four-way joint 106, a first stainless steel pipe 107 connected outside the four-way joint 106, a sintered filter element 101, an acoustic speed orifice 102, a second sealing gasket 103, a nozzle 104 and a contraction hole 105, thereby facilitating the installation of the dilution module 10 and the dilution of the gas.

[0031] As shown in the Figure 2 , Figures 4-5 , the installation assembly 33 comprises a plug column 331, and an inner cavity 332, a moving groove 333 and a limiting groove 334 are arranged at the middle of the plug column 331, the moving groove 333 and the limiting groove 334 are connected, the number of the limiting groove 334 and the moving groove 333 is twice the number of the plug column 331, a main pull rope 335 is connected at the middle of the inner cavity 332, a pull block 336 is connected at the end of the main pull rope 335, the pull block 336 is a cylindrical structure, a secondary pull rope 337 is connected at the other end of the main pull rope 335, an auxiliary plate 338 is connected at the end of the secondary pull rope 337, the auxiliary plate 338 is adapted to the limiting groove 334, a limiting block 339 and a supporting spring 3310 are fixedly connected outside the auxiliary plate 338, the limiting block 339 is adapted to the moving groove 333, and the number of the supporting spring 3310 is equal to the number of the limiting block 339, thereby facilitating the quick installation and fixation of the air inlet pipe module 3.

[0032] As shown in the Figure 7As shown, the automatic adjusting assembly 83 comprises an auxiliary frame 831, a driving motor 832 is mounted on the outer side of the auxiliary frame 831, and a mounting plate 833 is arranged between the driving motor 832 and the auxiliary frame 831 and connected by bolts, the output end of the driving motor 832 is fixedly connected with a threaded column 834, the outer side of the lead screw 84 is fixedly connected with a threaded block 835, and the threaded column 834 and the threaded block 835 are engaged, thereby facilitating automatic adjustment and locking of the lead screw 84 without manual operation.

[0033] The working principle of the utility model is as follows: during the device assembly process, the sampling rod 1 is fixed inside the air inlet pipe module 3, the air inlet pipe module 3 is connected with the case 4, then the air guide pipe module 7 and the air inlet pipe module 3 are sealed by the first O-shaped ring 5 and the second O-shaped ring 6; the locking mechanism 8 is connected with the air inlet pipe module 3; the dilution module 10 is connected with the air inlet pipe module 3 and connected by the second stainless steel pipe 11; the double sleeve outer tooth side tee joint 9 and the double sleeve pipe joint 13 are fixed to the air inlet pipe module 3; finally, the double sleeve through plate joint 12 is connected with the case 4, the dilution gas with a certain pressure enters the nozzle 104, then enters the contraction hole 105, at this time, negative pressure (Venturi effect) is generated, the flue gas is drawn into the four-way joint 106, mixed with the dilution gas and then enters the analyzer for measurement; the high concentration flue gas can be diluted by 100 times and then enters the high precision analyzer environment air instrument for measurement, the concentration of the measured gas in the flue gas is greatly reduced after dilution, the dust and humidity are also greatly reduced, the loss of the measured gas caused by the dust and humidity can be reduced, thereby the system measurement precision is improved, and the system maintenance amount is also reduced.

[0034] It should be noted that, compared with the traditional direct extraction system, one of the main problems is to filter and adjust a large amount of flue gas. The utility model dilution system avoids such problems to the greatest extent. The gas can enter the flue gas dilution sampling device at a very low flow rate, which is two orders of magnitude lower than the air intake of the direct extraction system. This means that only a small amount of moisture needs to be removed and a small amount of particulate matter needs to be filtered. Due to the low air flow rate, the particulate matter basically flows with the flue gas instead of entering the flue gas dilution sampling device. This greatly reduces the problems caused by humidity and particulate matter interference in the instrument, reduces many faults; the small air extraction amount improves the service life of the filter 72 and reduces the maintenance workload; the gas is transported under positive pressure, and pipeline leakage has less effect on measurement; dilution reduces the moisture content, so that the dew point of the flue gas is reduced to-29~-40 DEG C, and a heating sampling pipe and a cooler are not needed; high concentration gas can be diluted to the appropriate concentration measurement range of the analyzer; the system measurement precision is improved, and the daily maintenance amount is reduced.

[0035] It should be noted that the flue gas dilution sampling device in the case is a small flow flue gas continuous sampling device designed by using the principle of sonic orifice, taking the dilution gas as the power source of the vacuum generator; The flue gas passes through the coarse and fine filter and the pre-selected sonic orifice 102, is diluted by the dilution gas introduced into the vacuum generator, and becomes sample gas sent to the gas analyzer. The dew point of the sample gas is much lower than the dew point of the outside air, which ensures that the sample gas entering the analyzer will not condense, thereby ensuring the accuracy of the measurement results.

[0036] It should be noted that, through the installation of the assembly 33, when installing between the case 4 and the connecting flange 31, the user will pull the pull block 336, so that the pull block 336 drives the main pull rope 335 to pull along the inside of the inner cavity 332, and at the same time pulls the auxiliary pull rope 337, so that the auxiliary pull rope 337 drives the auxiliary plate 338 and the limiting block 339 to move to the inside of the moving groove 333, at this time The supporting spring 3310 is compressed until the limiting block 339 completely enters the inside of the moving groove 333, when the insertion column 331 is inserted into the through hole reserved in the case 4, the connecting flange 31 is in contact with the case 4, the pull block 336 is loosened, and the auxiliary plate 338 and the limiting block 339 are extruded under the elastic potential of the supporting spring 3310, so that the outside of the insertion column 331 extends, and the insertion column 331 is clamped in the reserved hole. Similarly, the remaining insertion columns 331 are fixed in the above manner, which is simple in structure, convenient to operate, time-saving and labor-saving, and improves the installation efficiency of the air inlet pipe module 3.

[0037] It should be noted that, through the automatic adjustment assembly 83, when the screw rod 84 needs to be adjusted, the driving motor 832 is connected between the auxiliary frame 831 through the mounting plate 833 under the support of the auxiliary frame 831, the driving motor 832 is started, the output end of the driving motor 832 drives the threaded column 834 to rotate, and then meshes with the threaded block 835, so that the threaded block 835 drives the screw rod 84 to rotate, thereby the subsequent locking operation of the gas guide pipe module 7 can be performed, which is simple in structure, convenient to operate, time-saving and labor-saving.

[0038] The above is only the preferred embodiment of the present application, and it should be noted that for ordinary technical personnel in the technical field, without departing from the principle of the present application, some improvements and refinements can be made, which should also be considered as the protection range of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the field without special description and limitation.

Claims

1. A flue gas dilution sampling device, comprising a sampling rod (1), characterized in that, An asbestos pad (2) and an air inlet pipe module (3) are provided on one side of the sampling rod (1). A machine box (4) is provided on one side of the air inlet pipe module (3). A guide pipe module (7) is connected to one side of the air inlet pipe module (3). A first O-ring (5) and a second O-ring (6) are provided between the air inlet pipe module (3) and the guide pipe module (7). A locking mechanism (8) is connected to the end of the guide pipe module (7). A double ferrule external thread tee connector (9), a dilution module (10) and a double ferrule pipe connector (13) are provided at the bottom of the air inlet pipe module (3). A second stainless steel pipe (11), a double ferrule through-plate connector (12) and a double ferrule right angle connector (14) are provided on the outside of the dilution module (10).

2. The flue gas dilution sampling device according to claim 1, characterized in that, The sampling rod (1) includes a connector (1001), a sampling tube (1002) is installed in the middle of the connector (1001), and the air inlet module (3) includes a connecting flange (31), an air inlet pipe (32) connected to the outside of the connecting flange (31), and an installation assembly (33).

3. The flue gas dilution sampling device according to claim 1, characterized in that, The air guide module (7) includes a ball screw (71), a filter (72), a connecting rod (73) set in the middle of the filter (72), an air guide seat (75) connected to one side of the filter (72), and a first sealing gasket (74) set at the connection between the air guide seat (75) and the filter (72).

4. The flue gas dilution sampling device according to claim 1, characterized in that, The locking mechanism (8) includes a connecting seat (81), a lead screw (84) connected to one side of the connecting seat (81), an automatic adjustment component (83) connected to the end of the lead screw (84), and a clamping block (82) provided on the outside of the lead screw (84).

5. The flue gas dilution sampling device according to claim 1, characterized in that, The dilution module (10) includes a four-way connector (106), a first stainless steel tube (107) connected to the outside of the four-way connector (106), a sintered filter element (101), a sonic orifice (102), a second sealing gasket (103), a nozzle (104), and a shrinkage orifice (105).

6. The flue gas dilution sampling device according to claim 2, characterized in that, The installation assembly (33) includes a plug (331), and the plug (331) has an inner cavity (332), a moving groove (333) and a limiting groove (334) in the middle. The moving groove (333) and the limiting groove (334) are connected to each other. The number of the limiting groove (334) and the moving groove (333) is twice the number of the plug (331). The inner cavity (332) is fitted with a main pull rope (335).

7. The flue gas dilution sampling device according to claim 6, characterized in that, The main pull rope (335) is connected to a pull block (336) at one end. The pull block (336) is a cylindrical structure. The other end of the main pull rope (335) is connected to a secondary pull rope (337). The end of the secondary pull rope (337) is connected to an auxiliary plate (338). The auxiliary plate (338) is adapted to the limiting groove (334). A limiting block (339) and a support spring (3310) are fixedly connected to the outside of the auxiliary plate (338). The limiting block (339) is adapted to the moving groove (333). The number of support springs (3310) is equal to the number of limiting blocks (339).

8. The flue gas dilution sampling device according to claim 4, characterized in that, The automatic adjustment component (83) includes an auxiliary frame (831), a drive motor (832) is mounted on the outside of the auxiliary frame (831), an mounting plate (833) is provided between the drive motor (832) and the auxiliary frame (831), the mounting plate (833) and the auxiliary frame (831) are connected by bolts, a threaded column (834) is fixedly connected to the output end of the drive motor (832), a threaded block (835) is fixedly connected to the outside of the lead screw (84), and the threaded column (834) and the threaded block (835) mesh with each other.

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