Sodium silicate kiln tail gas emission detection device

Abstract

A sodium silicate kiln tail gas emission detection device relates to the technical field of tail gas detection devices and comprises a first-effect separator, a second-effect separator and a third-effect separator which are arranged in parallel, and a first-effect evaporator, a second-effect evaporator and a third-effect evaporator which are correspondingly connected with the first-effect separator, the second-effect separator and the third-effect separator. The utility model solves the problems in the prior art that the RO (reverse osmosis) membrane is short in service life, frequent in replacement and large in equipment investment due to the existence of soluble silicon impurities when the raw material saline water is pre-concentrated by adopting the RO membrane; multiple-effect evaporation is carried out by adopting an MVR method or directly using fresh steam, so that the energy consumption is relatively high and is not applied; in the process of increasing the concentration of the saline water, generated silicon dioxide sediment impurities cannot be removed in time, so that the purity is low, scaling is carried out in an evaporator, and normal operation of equipment is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas detection devices, in particular to a tail gas emission detection device for a sodium silicate kiln furnace. Background Art

[0002] The flue gas of the sodium silicate kiln furnace needs to undergo environmental protection treatment measures such as dry desulfurization, denitrification, and bag dust removal, and is discharged after all data meet the standards. The environmental protection supervision department conducts assessments based on the data of the on-line optical monitoring instrument installed on the emission chimney.

[0003] A patent with a publication number of CN219641657U is disclosed in the prior art. The solution includes a mounting frame, a telescopic cylinder, and a tray for connecting a tail gas probe; the telescopic cylinder includes a cylinder body and a telescopic rod. The cylinder body is connected to the mounting frame, the telescopic rod is slidably connected to the cylinder body, and the tray is connected to the telescopic rod. The telescopic rod drives the tray to move in a direction away from or close to the cylinder body. This tail gas probe fixture changes the way of manually holding the tail gas probe for detection. The tray on this tail gas probe fixture is connected to the tail gas probe, making the tail gas probe more stable. The telescopic cylinder drives the tray to move through expansion and contraction, so that the tail gas probe can move smoothly and the moving position of the tail gas probe can be accurately controlled, thereby improving the detection accuracy. The test results obtained by the tail gas detection device and the tail gas detection system using this tail gas probe fixture are more accurate.

[0004] The prior art including the above patent gradually exposes the deficiencies of the prior art during use, mainly manifested in the following aspects:

[0005] Since the flue gas contains water vapor, trace amounts of alkali dust, sand, etc., after a certain period of time, these impurities will adhere to the sensitive parts of the detector probe, resulting in a large deviation in the data of the dust content, leaving the operator at a loss.

[0006] In summary, it is obvious that the prior art has inconveniences and defects in actual use, so it is necessary to improve it. Summary of the Utility Model

[0007] Aiming at the defects in the prior art, the utility model provides a tail gas emission detection device for a sodium silicate kiln furnace to solve the problem that in the traditional technology, due to the fact that the flue gas contains water vapor, trace amounts of alkali dust, sand, etc., after a certain period of time, these impurities will adhere to the sensitive parts of the detector probe, resulting in a large deviation in the data of the dust content.

[0008] To achieve the above object, the utility model provides the following technical solutions:

[0009] Sodium silicate kiln tail gas emission detection device, including a sodium silicate kiln, the flue gas outlet of the sodium silicate kiln is successively connected in series with a denitration device and a desulfurization device, the desulfurization device is connected to a bag filter, the bag filter is connected with a flue gas pipeline, the flue gas pipeline is connected with a wet dust collector, and the smoke inlet of the wet dust collector is connected to a chimney through a smoke inlet pipeline;

[0010] A vertically arranged inlet pipe connected to the inlet pipe is arranged in the wet dust collector, the lower port of the inlet pipe extends below the liquid level of the wet dust collector, a diffusion component for uniformly diffusing the incoming flue gas is rotatably arranged in the wet dust collector, and a guiding structure for guiding impurities in the wet dust collector out is arranged on the diffusion component.

[0011] As an optimized scheme, the wet dust collector includes a transparent housing, and a sampling valve communicating with its inner cavity is fixedly connected to the outer wall of the housing near the lower end.

[0012] As an optimized scheme, the diffusion component includes a rotating column rotatably installed on the inner bottom surface of the housing, the rotating column is located below the inlet pipe, bottom diffusion blades are arranged around the circumferential wall of the rotating column, and side diffusion blades are vertically fixedly connected to the outer ends of the bottom diffusion blades.

[0013] As an optimized scheme, the lower end of the bottom diffusion blade abuts against the inner bottom surface of the housing by friction.

[0014] As an optimized scheme, the side end of the side diffusion blade is in frictional contact with the inner side surface of the housing.

[0015] As an optimized scheme, a dispersion groove is coaxially opened at the upper end of the rotating column, the lower end of the inlet pipe is rotatably inserted into the dispersion groove, and a plurality of dispersion holes communicating with the dispersion groove are arranged around the circumferential wall of the rotating column.

[0016] As an optimized scheme, each dispersion hole is located in the area between adjacent bottom diffusion blades.

[0017] As an optimized scheme, the guiding structure includes a guiding hole opened at the lower end of the rotating column, the guiding hole is communicated with the dispersion groove, the lower end of the guiding column extends below the housing, and a plug is threadedly connected to the lower port of the guiding hole.

[0018] As an optimized scheme, a toothed ring is fixedly connected to the outer wall of the guiding column, a driving machine is fixedly connected to the outer bottom surface of the housing, and the output end of the driving machine meshes with the toothed ring by a gear.

[0019] As an optimized solution, a flue gas outlet pipe is fixedly connected to the upper end of the housing. The inlet end of the flue gas outlet pipe is located in the area above the liquid level of the housing, and the outlet end of the flue gas outlet pipe is connected to a flue gas pipeline.

[0020] As an optimized solution, a liquid adding valve port communicating with its inner cavity is fixedly connected to the outer wall of the housing near the upper end.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] By using the sampling valve, regularly detect the color, turbidity, conductivity and pH value of the water in the housing. According to the variation rules of these data, it can be determined whether the dust content in the flue gas exceeds the standard. If there is a large deviation from the data of the optical instrument, the optical instrument can be calibrated and corrected.

[0023] By rotatably arranging a dispersion component in the housing, the mixing uniformity of the incoming flue gas and the internal liquid can be increased, and the detection accuracy can be improved; by providing a guiding-out structure, it is convenient to discharge the accumulated impurities inside during the cleaning state, which is convenient for daily maintenance and improves the detection accuracy. Description of the Drawings

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual scale.

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

[0026] Figure 2 It is a schematic structural diagram of the wet dust collector of the present utility model.

[0027] In the figure: 1 - sodium silicate kiln; 2 - denitration device; 3 - desulfurization device; 4 - bag filter; 5 - flue gas pipeline; 6 - flue gas induced draft fan; 7 - wet dust collector; 8 - inlet flue; 9 - chimney; 10 - on-line environmental protection detector; 11 - housing; 12 - inlet pipe; 13 - flue gas outlet pipe; 14 - rotating column; 15 - bottom diffusion blade; 16 - side diffusion blade; 17 - dispersion hole; 18 - dispersion tank; 19 - guiding-out hole; 20 - plug; 21 - driving machine; 22 - gear ring; 23 - sampling valve; 24 - liquid adding valve port. Detailed Embodiments

[0028] The embodiments of the technical solution of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0029] As Figure 1 and Figure 2 shown, the sodium silicate kiln tail gas emission detection device includes a sodium silicate kiln 1. A denitration device 2 and a desulfurization device 3 are connected in series in sequence at the flue gas outlet of the sodium silicate kiln 1. The desulfurization device 3 is connected to a bag filter 4. A flue gas pipeline 5 is connected to the bag filter 4. A wet dust collector 7 is connected to the flue gas pipeline 5. The smoke inlet of the wet dust collector 7 is connected to a chimney 9 through a smoke inlet pipeline 8;

[0030] A flue gas induced draft fan 6 is connected to the flue gas pipeline 5, and an on-line environmental protection detection instrument 10 is connected to the chimney 9.

[0031] An inlet pipe 12 connected to the smoke inlet pipeline 8 is vertically arranged in the wet dust collector 7. The lower port of the inlet pipe 12 extends below the liquid level of the wet dust collector 7. A diffusion assembly for uniformly diffusing the incoming flue gas is rotatably arranged in the wet dust collector 7. A derivation structure for deriving impurities in the wet dust collector 7 is arranged on the diffusion assembly.

[0032] The wet dust collector 7 includes a transparent housing 11. A sampling valve 23 communicating with its inner cavity is fixedly connected to the outer wall of the housing 11 near the lower end.

[0033] The diffusion assembly includes a rotating column 14 rotatably installed on the inner bottom surface of the housing 11. The rotating column 14 is located below the inlet pipe 12. Bottom diffusion blades 15 are arranged around the circumferential wall of the rotating column 14. Side diffusion blades 16 are vertically and fixedly connected to the outer ends of the bottom diffusion blades 15.

[0034] The lower end of the bottom diffusion blade abuts against the inner bottom surface of the housing 11 by friction.

[0035] The side end of the side diffusion blade 16 is in frictional contact with the inner side surface of the housing 11.

[0036] A dispersion groove 18 is coaxially opened at the upper end of the rotating column 14. The lower end of the inlet pipe is rotatably inserted into the dispersion groove 18. A plurality of dispersion holes 17 communicating with the dispersion groove 18 are arranged around the circumferential wall of the rotating column 14.

[0037] Each dispersion hole 17 is located in the area between adjacent bottom diffusion blades 15.

[0038] The export structure includes an export hole 19 opened at the lower end of the rotating column 14. The export hole 19 is communicated with the dispersion tank 18. The lower end of the guide column extends below the housing 11. A plug 20 is threadedly connected to the lower port of the export hole 19. When internal cleaning is required, the plug is removed, and the driving machine drives the bottom diffusion blade and the side diffusion blade to rotate to clean the impurities adhered to the inner wall, and the liquid and impurities inside are discharged along the export hole together.

[0039] A toothed ring 22 is fixedly connected to the outer wall of the guide column, and a driving machine 21 is fixedly connected to the outer bottom surface of the housing 11. The output end of the driving machine 21 meshes with the toothed ring 22 by a gear.

[0040] A flue gas outlet pipe 13 is fixedly connected to the upper end of the housing 11. The inlet end of the flue gas outlet pipe 13 is located in the area above the liquid level of the housing 11, and the outlet end of the flue gas outlet pipe 13 is connected to the flue gas pipeline 5.

[0041] A liquid adding valve port 24 communicating with its inner cavity is fixedly connected to the outer wall of the housing 11 near the upper end.

[0042] The usage method of this device is as follows:

[0043] Using the wet dust removal principle, a transparent glass bottle wet dust collector is designed and installed. A certain amount of deionized pure water is added in advance, and then a chemical indicator is added. The flue gas is introduced below the liquid level of the glass bottle for bubbling washing, and the purified flue gas is led out from the bottle mouth above the liquid level. Regularly detect the color, turbidity, conductivity and pH value of the water in the bottle. According to the variation rules of these data, it can be determined whether the dust content in the flue gas exceeds the standard. If there is a large deviation from the data of the optical instrument, the optical instrument can be calibrated and corrected.

[0044] In the design scheme, the volume of the glass bottle can be selected from 2500 to 5000 ml. There is a stopcock water sampling valve at the bottom, a rubber stopper at the bottle mouth, holes with a diameter of φ12 - 20 are drilled at the inlet and outlet, and high-temperature resistant PP hoses of the same size are provided. The inlet hose is connected to the outlet pipe of the flue gas fan and inserted below the liquid level in the bottle; the outlet hose is inserted above the liquid level and connected to the inlet pipe of the flue gas fan.

[0045] Judgment principle: ① Phenolphthalein is added as a chemical indicator in the glass bottle, and the water is changed every 8 hours. If the water changes from colorless to light red within 8 hours, it is considered that the dust content has exceeded the upper limit, and attention should be paid to the data displayed by the optical instrument, and the reason for the abnormal working condition should be judged. ② The turbidity, conductivity and pH value are detected once every 4 hours. When two of the three conditions, i.e., turbidity > 5.0 NTU, or conductivity > 100 μs / cm, or pH value > 8.0, are met, it is considered that the working condition is abnormal, and attention should be paid to the data displayed by the optical instrument, and the reason for the abnormal working condition should be judged.

[0046] Record the turbidity, conductivity, pH value of the water in the bottle and the dust content data of the optical instrument at the same time for multiple times, and establish respectively: turbidity-dust content, conductivity-dust content, pH value-dust content comparison curves, and find the data correlation relationship from them, which is more convenient to guide the daily data determination.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the specification of the present invention.

Claims

1. Sodium silicate kiln exhaust emission detection device, characterized by: The invention comprises a sodium silicate kiln (1), wherein a desulfurization device (2) and a desulfurization device (3) are sequentially connected in series at a smoke outlet of the sodium silicate kiln (1), wherein the desulfurization device (3) is connected to a bag filter (4), wherein a smoke pipe (5) is connected to the bag filter (4), wherein a wet dust collector (7) is connected to the smoke pipe (5), wherein a smoke inlet of the wet dust collector (7) is connected to a chimney (9) via a smoke inlet pipe (8); An inlet pipe (12) connected to the smoke inlet pipe (8) is vertically arranged in the wet dust collector (7), and a lower end of the inlet pipe (12) extends below the liquid level of the wet dust collector (7). A diffusion component for uniformly diffusing the incoming smoke is rotatably arranged in the wet dust collector (7), and a diffusing structure for diverting impurities in the wet dust collector (7) is arranged on the diffusion component.

2. The sodium silicate kiln exhaust emission detection device according to claim 1 is characterized in that: The wet dust collector (7) comprises a transparent housing (11), and a sampling valve (23) communicating with the inner cavity of the housing (11) is fixedly connected to the outer wall of the housing (11) near the lower end.

3. The sodium silicate kiln tail gas emission detection device according to claim 2 is characterized in that: The diffusion assembly comprises a rotating column (14) rotatably mounted on the inner bottom surface of the shell (11); the rotating column (14) is located below the inlet pipe (12); a bottom diffusion blade (15) is arranged around the peripheral wall of the rotating column (14); and a side diffusion blade (16) is vertically fixed to the outer end of the bottom diffusion blade (15).

4. The sodium silicate kiln tail gas emission detection device according to claim 3 is characterized in that: The lower end of the bottom spreading blade is frictionally abutted against the inner bottom surface of the shell (11).

5. The sodium silicate kiln tail gas emission detection device according to claim 4 is characterized in that: The side end portions of the side diffusion blades (16) are in frictional contact with the inner side surface of the casing (11).

6. The sodium silicate kiln tail gas emission detection device according to claim 5 is characterized in that: The upper end of the rotating column (14) is coaxially provided with a dispersion groove (18), the lower end of the inlet pipe is rotatably inserted into the dispersion groove (18), and the peripheral wall of the rotating column (14) is provided with a plurality of dispersion holes (17) connected to the dispersion groove (18).

7. The sodium silicate kiln tail gas emission detection device according to claim 6 is characterized in that: Each of the diffusion holes (17) is located in the area between adjacent bottom diffusion blades (15).

8. The sodium silicate kiln tail gas emission detection device according to claim 7 is characterized in that: The derivation structure comprises a derivation hole (19) opened at the lower end of the rotating column (14), the derivation hole (19) is connected to the dispersion groove (18), the lower end of the guide column extends to the bottom of the shell (11), and the lower end of the derivation hole (19) is threadedly connected with a plug (20).

9. The sodium silicate kiln tail gas emission detection device according to claim 8, characterized in that: A gear ring (22) is fixedly connected to the outer wall of the guide column, a driving machine (21) is fixedly connected to the outer bottom surface of the housing (11), and an output end of the driving machine (21) meshes with the gear ring (22) via a gear.

10. The sodium silicate kiln tail gas emission detection device according to claim 9, characterized in that: A smoke outlet pipe (13) is fixedly connected to the upper end of the shell (11), the inlet end of the smoke outlet pipe (13) is located in the area above the liquid level of the shell (11), and the outlet end of the smoke outlet pipe (13) is connected to the smoke duct (5).

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