A sampling device for high-pressure industrial gas condensation filtration

Abstract

This invention discloses a sampling device for high-pressure industrial gas condensation and filtration, comprising a sampling probe, which includes a gas sampling head, a multi-stage filter element, a condensation device, an insulation layer, and a cooling device. The multi-stage filter element has different stages that can filter the sampled gas. One end of the multi-stage filter element is connected to the gas sampling head, and the other end of the multi-stage filter element extends to the outside of the sampling probe. The condensation device is located outside the multi-stage filter element and has a condensation chamber inside, which is separated from the inside of the multi-stage filter element. The insulation layer is located outside the condensation device, and the cooling device is connected to the condensation chamber of the condensation device through the insulation layer. The beneficial effect of this invention is that it enables the filtration and sampling of high-temperature, high-pressure industrial gases not exceeding 4 MPa.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of chemical metallurgy and gas filtering and sampling, and particularly relates to a sampling device for high-pressure industrial gas condensation and filtering. BACKGROUND

[0002] The current industrial gas filtering and sampling technology generally increases a stainless steel filter element in the sampling device for filtering and completing gas sampling. The stainless steel filter element needs to be replaced regularly even if a certain purging is performed, which is relatively cumbersome. Moreover, the industrial gas containing heavy oil or heavy hydrocarbon and the like has strong corrosiveness, and will condense in the pipeline and block the filter element and the pipeline as the temperature decreases, causing damage to the back-end analytical instrument. The current sampling device cannot meet the sampling requirements. In addition, the use pressure of the current sampling device is generally required to be less than 1 MPa, which cannot meet the sampling requirements of the industrial furnace under high pressure conditions, and the application range is small. SUMMARY

[0003] The present application solves the technical problem that the current sampling device samples the gas with high pressure and temperature, and aims to provide a sampling device for high-pressure industrial gas condensation and filtering. The present application can obtain the industrial gas after being cooled and filtered by the sampling device under high-temperature and high-pressure conditions. The present application cools and condenses the substances such as heavy oil and heavy hydrocarbon which are easy to solidify at normal temperature in advance by step-by-step condensation of the industrial gas, and returns the substances. The temperature of the condensation chamber is monitored during the condensation process to ensure that the temperature of the sampled gas after condensation meets the use requirements. In addition, the integrated design meets the sampling requirements of the high-pressure or low-pressure industrial gas with a pressure of ≤4 MPa.

[0004] The present application is implemented by the following technical scheme:

[0005] A sampling device for high-pressure industrial gas condensation and filtering, comprising a sampling probe, wherein the sampling probe comprises:

[0006] a gas sampling head;

[0007] a multi-stage filter element, the multi-stage filter element being used for filtering and sampling the gas at different levels, one end of the multi-stage filter element being communicated with the gas sampling head, and the other end of the multi-stage filter element being communicated with an outlet device at the back end;

[0008] a condensation device, the condensation device being arranged outside the multi-stage filter element, and the condensation device having a condensation cavity in the inside thereof, the condensation cavity being separated from the inside of the multi-stage filter element;

[0009] a heat preservation layer, the heat preservation layer being arranged outside the condensation device;

[0010] a refrigeration device, the refrigeration device being communicated with the condensation cavity of the condensation device through the heat preservation layer.

[0011] Optionally, the sampling probe is vertically placed in use, the gas sampling head is located at the lower end for connecting with the sampling point (such as an industrial pipeline), and the gas outlet device is located at the upper end for discharging the sample gas filtered by condensation for use by the rear-end equipment.

[0012] Optionally, the multi-stage filter core is fixedly arranged in the condensing device, and the multi-stage filter core comprises filter sheets, isolation columns, steel cables and filter holes.

[0013] The steel cables pass a plurality of the filter sheets into a string, and the isolation columns are arranged between adjacent filter sheets to separate the adjacent filter sheets.

[0014] Optionally, the filter holes are arranged on each filter sheet, and the number of the filter holes on each filter sheet is arranged to be less as the filter sheet is farther away from the gas sampling head. The sample gas passes through the multi-stage filter core from bottom to top, is gradually condensed and filtered on different levels and different temperature filter sheets of the multi-stage filter core, so that the sample gas is fully filtered, the filtered gas is transmitted to the gas outlet device for output, and other substances after cooling and condensation are returned to the process pipeline through the gas sampling head and the flange.

[0015] Optionally, the condensing device is fixedly arranged in the heat preservation layer, and the condensing device comprises a first cylinder tube and a second cylinder tube. The first cylinder tube is sleeved in the second cylinder tube, and the condensing cavity is formed between the first cylinder tube and the second cylinder tube. The multi-stage filter core is located in the first cylinder tube, the multi-stage filter core is separated from the first cylinder tube, and the outer wall of the second cylinder tube is attached to the inner wall of the heat preservation layer.

[0016] Optionally, the outer peripheral wall of the first cylinder tube is provided with a spiral sheet, and the spiral sheet is located in the condensing cavity.

[0017] Optionally, one end of the first cylinder tube is provided with a temperature measuring tube, and the temperature measuring tube leads to the inside of the multi-stage filter core.

[0018] Optionally, the temperature measuring tube is communicated with the gas outlet device, the gas outlet device is communicated with a purge pipe, and the purge pipe passes through the heat preservation layer and leads to the outside of the sampling probe.

[0019] Optionally, a refrigeration device is arranged outside the sampling probe, the refrigeration device comprises a cold gas inlet pipe and a compressed air inlet pipe, the cold gas inlet pipe and the compressed air inlet pipe are communicated, the cold gas inlet pipe passes through the heat preservation layer and leads to the condensing cavity, and the refrigeration device further has a heat exhaust pipe communicated with the cold gas inlet pipe.

[0020] Optionally, the gas in the condensing cavity has pressure, so that the condensed gas in the condensing cavity and the gas in the multi-stage filter core effectively exchange heat.

[0021] Optionally, the internal of the gas sampling head can withstand the pressure of the gas being less than or equal to 4 MPa, and the gas sampling head samples the sampling gas filtered by the multi-stage filter core and not exceeding 4 MPa.

[0022] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0023] 1. The sampling probe of the present application adopts an integrated design and uses a national standard high-pressure flange with a neck, and can adapt to various process pipes and meet the sampling requirements of industrial pipe furnaces under high pressure (4 MPa). Specifically, one end of the multi-stage filter core is communicated with the gas sampling head, the sampling gas first enters the multi-stage filter core from the gas sampling head, and the sampling gas is filtered after passing through the multi-stage filter core. The other end of the multi-stage filter core leads to the outside of the sampling probe, and the sampling gas flows out of the sampling probe. The condensing device is arranged outside the multi-stage filter core, the condensing cavity is arranged in the condensing device, the condensing cavity is separated from the inside of the multi-stage filter core, the heat preservation layer is arranged outside the condensing device, and the refrigeration device is communicated with the condensing cavity of the condensing device through the heat preservation layer. The condensing cavity cools the sampling gas in the multi-stage filter core, and the refrigeration device cools the condensing gas in the condensing cavity. Since the pressure of the sampling gas introduced from the gas sampling head does not exceed 4 MPa, the present application can filter and sample high-temperature and high-pressure industrial gas not exceeding 4 MPa.

[0024] 2. In the multi-stage filter core of the present application, the gas is gradually condensed and filtered on the filter sheets of different levels and different temperatures in the multi-stage filter core, ensuring that the gas is fully filtered, and the substances condensed on the filter sheets of different levels can automatically flow back into the process pipe, and in combination with regular external gas / liquid purge cleaning, the sampling probe can be kept clean and clean for a long time.

[0025] 3. The temperature detection of the present application uses cavity monitoring, i.e. the temperature measuring tube collects the temperature of the industrial gas filtered by the multi-stage filter core, which can effectively avoid the contamination of the temperature sensor (temperature measuring tube) by the process gas, and is also helpful for the pressure design of the sampling probe.

[0026] 4. The present application uses a high-performance vortex tube, i.e. a compressed air inlet pipe as a refrigeration device, and combines the condensation of the spiral sheet and the heat preservation layer, which can effectively ensure the heat exchange between the condensing gas and the industrial gas. In addition, the gas pressure in the condensing cavity can be greater than 0.7 MPa, which can effectively exchange heat between the condensing gas in the condensing cavity and the gas in the multi-stage filter core. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:

[0028] Figure 1 is a perspective view of the present application;

[0029] Figure 2 is an exploded view of the present application;

[0030] Figure 3 is a perspective view of the multi-stage filter core of the present application;

[0031] Figure 4 is a front view of the present application;

[0032] Figure 5 is a sectional view of the present application along the A-A direction.

[0033] Reference signs: 1 - sampling probe, 11 - flange, 111 - sampling inlet, 12 - gas sampling head, 121 - calibration port, 122 - calibration tube, 13 - multi-stage filter core, 131 - filter sheet, 132 - isolation column, 133 - steel cable, 134 - filter hole, 135 - temperature measuring tube, 136 - gas outlet device, 137 - purge tube, 14 - condensing device, 141 - first cylinder tube, 142 - cold gas inlet tube, 143 - spiral sheet, 144 - second cylinder tube, 145 - condensing cavity, 15 - heat insulation layer, 151 - front end cover, 152 - rear end cover, 153 - mounting bracket, 16 - refrigeration device, 161 - compressed air inlet tube, 162 - heat exhaust tube. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present application clearer, further detailed description will be given below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related content, and are not a limitation of the present application.

[0035] Example 1

[0036] As Figures 1-5As shown, a sampling device for high-pressure industrial gas condensation and filtration includes a sampling probe 1. The sampling probe 1 includes a gas sampling head 12, a multi-stage filter element 13, a condensation device 14, a heat insulation layer 15, and a cooling device 16. The multi-stage filter element 13 is used to filter the sampled gas at different stages. One end of the multi-stage filter element 13 is connected to the gas sampling head 12 (this is a structure that facilitates the connection between the flange 11 and the sampling probe 1), and the other end of the multi-stage filter element 13 leads to the outside of the sampling probe 1. The condensation device 14 is disposed outside the multi-stage filter element 13, and the condensation device 14 has a condensation chamber 145 inside, which is separated from the inside of the multi-stage filter element 13. The heat insulation layer 15 is disposed outside the condensation device 14, and the cooling device 16 is connected to the condensation chamber 145 of the condensation device 14 through the heat insulation layer 15.

[0037] like Figure 3 As shown, the multi-stage filter element 13 is fixedly disposed in the condensation device 14. The multi-stage filter element 13 includes: filter sheet 131, isolation column 132, steel wire cable 133 and filter hole 134.

[0038] A steel wire cable 133 is used to string together a number of filter discs 131, and an isolation column 132 is provided between adjacent filter discs 131 to separate adjacent filter discs 131.

[0039] Each filter element 131 is provided with a filter hole 134, and the number of filter holes 134 on each filter element 131 is arranged such that the farther the filter element 131 is from the gas sampling head 12, the fewer the number of filter holes 134 on the filter element 131.

[0040] like Figure 2 , 5 As shown, the condensing device 14 is fixedly installed inside the insulation layer 15. The condensing device 14 includes: a first tube 141 and a second tube 144. The first tube 141 is sleeved inside the second tube 144. The condensing chamber 145 is located between the first tube 141 and the second tube 144. A multi-stage filter element 13 is located inside the first tube 141 and is separated from the first tube 141. The outer wall of the second tube 144 is attached to the inner wall of the insulation layer 15. A spiral blade 143 is provided on the outer peripheral wall of the first tube 141 and is located inside the condensing chamber 145.

[0041] A temperature measuring tube 135 (similar to a thermocouple) is provided at one end of the first tube 141. A wire is connected to the temperature measuring tube 135, which passes through the insulation layer 15 and extends out of the sampling probe 1. The temperature measuring tube 135 is connected to a temperature display instrument through the wire. The temperature measuring tube 135 leads to the rear end of the multi-stage filter element 13 (i.e., the end near the gas outlet device 136, used to measure the temperature of the gas after condensation and filtration).

[0042] The temperature measuring tube 135 is connected to the air outlet device 136, and the air outlet device 136 is connected to the purge tube 137 (purge can be carried by gas, and in some working conditions, it can also be carried by pressurized liquid to clean the multi-stage filter element 13). The purge tube 137 passes through the insulation layer 15 and leads to the outside of the sampling probe 1.

[0043] A cooling device 16 is provided outside the sampling probe 1. The cooling device 16 includes a cold air inlet pipe 142 and a compressed air inlet pipe 161. The cold air inlet pipe 142 and the compressed air inlet pipe 161 are connected. The cold air inlet pipe 142 passes through the insulation layer 15 and leads to the condensation chamber 145. The cooling device 16 also has a heat exhaust pipe 162. After the compressed air is cooled by the cooling device 16, the heat is discharged from the heat exhaust pipe 162. The cold air is introduced into the cold air inlet pipe 142 and finally into the condensation chamber 145.

[0044] The sampling probe 1 is placed vertically, and its two ends are sealed by the front cover 151 and the rear cover 152, respectively. The two ends of the lower gas sampling head 12 are fixedly connected to the front cover 151 and the flange 11, respectively. Optionally, the gas sampling head 12 has a calibration port 121, one end of the calibration tube 122 is connected to the calibration port 121, and the other end of the calibration tube 122 leads to the gas outlet device 136.

[0045] Example 2

[0046] The working process of this invention is as follows:

[0047] like Figure 2 , 5 As shown, the sampling gas enters the gas sampling head 12 through the inlet in the middle of the flange 11. After passing through the multi-stage filter element 13, the sampling gas passes through the rear temperature measuring tube 135 to ensure the effect of condensation filtration. Finally, the sampling gas flows out of the outside of the sampling probe 1 from the gas outlet device 136. At the same time, during the filtration process of the sampling gas through the multi-stage filter element 13, the cooling device 16 generates air cooling. The compressed air inlet pipe 161 transmits the generated cooling air through the cold air inlet pipe 142, which in turn introduces the cooling air into the condensing chamber 145. The condensing chamber 145 cools and condenses the sampling gas in the multi-stage filter element 13.

[0048] Preferably, when the sampling gas in the multi-stage filter element 13 is no longer filtered and cooled, the refrigeration device 16 stops working. Since the gas in the condensation chamber 145 absorbs the heat of the sampling gas in the multi-stage filter element 13, after the refrigeration device 16 stops working, the gas in the condensation chamber 145 is drawn and discharged from the heat exhaust pipe 162. The gas sampling head 12 can withstand a gas pressure of less than or equal to 4 MPa.

[0049] When the sampling gas in the multi-stage filter element 13 is no longer filtered and cooled, the purge pipe 137 is vented. The gas in the purge pipe 137 passes through the outlet device 136 and the multi-stage filter element 13 before reaching the flange 11. In this way, the purge pipe 137 sweeps out the impurities on the multi-stage filter element 13 through the flange 11.

[0050] Example 3

[0051] The sampling probe 1 can perform step-by-step condensation and filtration of high-pressure industrial gas, cool down the industrial gas inside the multi-stage filter element 13, and remove substances such as heavy oil and heavy hydrocarbons in the industrial gas that are easy to solidify at room temperature.

[0052] Specifically, the sampling probe 1 is provided with a multi-stage filter element 13, a condensation chamber 145 and a heat insulation layer 15 from the inside to the outside. Each filter element 131 is provided with a filter hole 134. The filter hole 134 is arranged such that the farther away from the gas sampling head 12, the fewer the number of filter holes 134 on the filter element 131. This allows the industrial gas to be filtered step by step in the multi-stage filter element 13. The sampling gas passes through the multi-stage filter element 13 from bottom to top and is condensed and filtered step by step on the filter elements 131 at different levels and temperatures in the multi-stage filter element 13. This ensures that the sampling gas is fully filtered. The filtered gas is sent to the gas outlet device 136 for output, while the cooled and condensed substance will flow back to the process pipeline through the flange 11.

[0053] To further explain, the gas outlet device 136 can be connected to the back-end equipment via the purge tube 137, which can place the temperature measuring tube 135 at the top of the multi-stage filter element 13. This facilitates setup and is used to detect the temperature of the sampled gas after passing through the multi-stage filter element 13, effectively preventing the temperature measuring tube 135 from being contaminated by industrial gases and also contributing to the pressure resistance design of the sampling device. The purge tube 137 is used for periodic external gas / liquid purging and cleaning of the filter element 131, which can keep the inside of the sampling probe 1 clean for a long time.

[0054] To further explain, in each filter element 131 of the multi-stage filter element 13, each filter element 131 absorbs heat from the sampled gas. The sampled gas closer to the gas sampling head 12 has a higher temperature, which causes the filter element 131 closer to the gas sampling head 12 to absorb more heat. After the sampled gas close to the temperature measuring tube 135 absorbs heat through each stage of filter element 131, the temperature of the sampled gas close to the temperature measuring tube 135 is significantly reduced. The temperature measuring tube 135 collects the temperature of the industrial gas after being filtered by the multi-stage filter element 13. A spiral blade 143 is installed inside the condensing chamber 145, and a refrigeration device 16 is connected to its outer side. An insulation layer 15 is installed on the outside of the condensing chamber 145. The refrigeration device 16 is connected to a high-performance vortex tube, i.e., a compressed air inlet pipe 161. The vortex tube uses compressed air as its power source, which is environmentally friendly and safe. The compressed air inlet enters the vortex tube, and the compressed air, after being cooled by the vortex tube, enters the condensing chamber 145 through the cold air inlet pipe 142. Heat is discharged from the heat exhaust pipe 162. Specifically, due to the action of the spiral blade 143, the entire large condensing chamber 145 is cooled by the spiral blade 143. The system is divided into multiple small condensing chambers 145, with each small condensing chamber 145 located between two adjacent spiral blades 143. The multi-stage filter element 13 has filter plates 131 with different levels and temperatures. Therefore, the different levels and temperatures of the filter plates 131 make each small condensing chamber 145 correspond to the temperature of each level of filter plate 131. The condensed gas enters and exits the condensing chamber 145 in a spiral rotation. The refrigeration device 16, combined with the spiral blades 143 and the insulation layer 15, can effectively ensure the heat exchange between the condensed gas and the industrial gas inside the condensing chamber 145.

[0055] To further explain, the insulation layer 15 is provided with a front cover 151 and a rear cover 152 at both ends. The insulation layer 15 wraps and fixes the condensation cavity 145. The side of the insulation layer 15 is also provided with through holes for pipe and wire installation, as well as mounting brackets 153 for easy installation and fixing.

[0056] Specifically, the lower end of the sampling probe 1 is provided with a flange 11, the lower end of which is used to connect to the process pipeline, and the through hole in the middle of the flange 11 serves as the sampling inlet 111; the upper end of the flange 11 is connected to the gas sampling head 12; optionally, the gas sampling head 12 is provided with a calibration port 121, the calibration port 121 is connected to a calibration tube 122, and the outlet of the calibration tube 122 extends to the gas outlet device 136, which facilitates the introduction of standard gas for calibration and shortens the gas replacement time in the sampling device; optionally, the flange 11 is a national standard high-pressure necked weld neck flange, which can be adapted to various process pipelines, and the gas pressure that the sampling inlet of the flange 11 can withstand is less than or equal to 4MPa.

[0057] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sampling device for high-pressure industrial gas condensation filtration, comprising a sampling probe (1), characterized in that, The sampling probe (1) includes: Gas sampling head (12); A multi-stage filter element (13) is used to filter the sampled gas at different levels. One end of the multi-stage filter element (13) is connected to the gas sampling head (12), and the other end of the multi-stage filter element (13) is connected to the outside of the sampling probe (1). A condensing device (14) is disposed outside the multi-stage filter element (13), and the condensing device (14) has a condensing chamber (145) inside, which is separated from the interior of the multi-stage filter element (13). A thermal insulation layer (15) is disposed on the outside of the condensation device (14); A refrigeration device (16) is connected to the condensation chamber (145) of the condensing device (14) through an insulation layer (15); The multi-stage filter element (13) is fixedly installed inside the condensation device (14). The multi-stage filter element (13) includes: filter sheet (131), isolation column (132), steel wire cable (133) and filter hole (134). The steel wire cable (133) strings together a number of filter sheets (131) and the isolation column (132) is provided between adjacent filter sheets (131) to separate adjacent filter sheets (131). Each filter element (131) is provided with filter holes (134), and the number of filter holes (134) on each filter element (131) is arranged such that the farther the filter element (131) is from the gas sampling head (12), the fewer the number of filter holes (134) on the filter element (131); The condensing device (14) is fixedly installed inside the insulation layer (15). The condensing device (14) includes: a first tube (141) and a second tube (144). The first tube (141) is sleeved inside the second tube (144). The condensing chamber (145) is located between the first tube (141) and the second tube (144). The multi-stage filter element (13) is located inside the first tube (141) and is separated from the first tube (141). The outer wall of the second tube (144) is attached to the inner wall of the insulation layer (15). The outer peripheral wall of the first tube (141) is provided with a spiral blade (143), which is located in the condensation chamber (145).

2. The sampling device for high-pressure industrial gas condensation filtration according to claim 1, characterized in that, A temperature measuring tube (135) is provided at one end of the first tube (141), and the temperature measuring tube (135) leads to the rear end of the multi-stage filter element (13).

3. A sampling device for high-pressure industrial gas condensation filtration according to claim 2, characterized in that, The temperature measuring tube (135) is connected to the air outlet device (136), and the air outlet device (136) is connected to the purge tube (137). The purge tube (137) passes through the insulation layer (15) and leads to the outside of the sampling probe (1).

4. A sampling device for high-pressure industrial gas condensation filtration according to claim 3, characterized in that, A cooling device (16) is provided outside the sampling probe (1). The cooling device (16) includes a cold air inlet pipe (142) and a compressed air inlet pipe (161). The cold air inlet pipe (142) and the compressed air inlet pipe (161) are connected. The cold air inlet pipe (142) passes through the insulation layer (15) and leads to the condensation chamber (145). The cooling device (16) also has a heat exhaust pipe (162), which is connected to the cold air inlet pipe (142).

5. A sampling device for high-pressure industrial gas condensation filtration according to claim 1, characterized in that, The gas sampling head (12) can withstand a gas pressure of less than or equal to 4 MPa.

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