Portable sampling device and portable sampling method for fixed bed pyrolysis gasification gas tar

Abstract

The invention provides a portable sampling device and a portable sampling method for fixed bed pyrolysis gasification gas tar, the portable sampling device comprises a sampling cavity, on one hand, a flow path of the fixed bed pyrolysis gasification gas tar is increased through a left-right reciprocating flow channel formed by at least one left side tower plate and at least one right side tower plate, and on the other hand, the sampling cavity is communicated with the sampling cavity; on the other hand, by arranging the heating piece controlled by the temperature control component, the internal temperature of the sampling cavity is effectively controlled, under the combined action of the two aspects, the condensation effect of tar in the sampling process is ensured, and the sampling effectiveness and accuracy are ensured. Moreover, the portable sampling device is convenient to use, low in cost, small in overall system, portable and movable, has the advantage of being suitable for being used under different working conditions, and can be used in the fixed bed pyrolysis gasification industrial process of carbon-containing matrixes such as sludge, biomass, coal and garbage.

Description

Technical Field

[0001] The present invention relates to the technical field of fixed bed pyrolysis gasification, and in particular to a portable sampling device and a portable sampling method for fixed bed pyrolysis gasification gas tar, which can be used in the industrial process of fixed bed pyrolysis gasification of carbon-containing substrates such as sludge, biomass, coal, and garbage. Background Art

[0002] Sludge pyrolysis and gasification technology is an advantageous technology for sludge resource utilization, harmlessness and volume reduction. Sludge is decomposed into gas, liquid and solid products through the pyrolysis and gasification process. The gas products are carbon monoxide, hydrogen and carbon dioxide, etc. These gases can be used as combustible gas for energy production. Due to the difference in the composition of sludge, the calorific value of the generated combustible gas is unstable. It is necessary to take samples and test them in time to regulate the composition of the pyrolysis and gasification raw materials so that the calorific value of the generated gas can be used for subsequent utilization. The liquid product is mainly tar, which is a complex mixture mainly composed of polycyclic aromatic hydrocarbons, phenols, heterocyclic compounds, etc. Due to its high viscosity and easy condensation, tar is easy to adhere to the production equipment, causing blockage and corrosion problems. If not handled properly, tar will also cause serious pollution to the environment. Therefore, in the process of sludge pyrolysis and gasification, timely and effective sampling and analysis of tar and combustible gas are crucial to ensure the normal operation of equipment and environmental protection.

[0003] At present, most mature samplers are used for flue gas sampling. There is no tar in the flue gas sampling process, which basically does not affect the sampler. For example, CN110823653A discloses a flue gas sampling device, a flue gas sampling instrument and a flue gas sampling method, which are used to collect various harmful gases emitted from flues and exhaust pipes of industrial and mining enterprises, which do not involve tar.

[0004] At present, some sampling systems are disclosed for the tar and combustible gas mixed products produced by the sludge pyrolysis and gasification process. For example, CN102175494A discloses a portable biomass gasification gas tar sampling device, which passes the sampled gas through a series of sampling bottles 21 (containing solvents or chemicals for condensation, collection and drying), and the tar components therein are diluted, cooled and collected in a wide temperature range. After the sampling is completed, the sampling pipeline is cleaned with an organic solvent, and the washing liquid is recovered, and the solution in each collection bottle is mixed with the solution after the pipeline is cleaned, so as to obtain a solution containing the tar components in all biomass gasification gases. Finally, the mixed solution is processed by extraction evaporation and the like to obtain the tar in the biomass gasification gas, so as to further analyze the characteristics such as the yield and components of the tar. However, the above-mentioned sampling device has the disadvantages of complex structure and cumbersome operation, and also needs to consume more solvents or chemicals.

[0005] Therefore, in response to existing industrial needs, it is necessary to develop a portable sampling device and a portable sampling method for tar and combustible gas used in fixed-bed pyrolysis and gasification. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides a portable sampling device and a portable sampling method for fixed-bed pyrolysis gasification gas tar, which are easy to use, low cost, and have a small overall system and can be portable and mobile. It has the advantages of being suitable for use under different working conditions and can be used in fixed-bed pyrolysis gasification industrial processes of carbon-containing matrices such as sludge, biomass, coal, and garbage.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] One of the purposes of the present invention is to provide a portable sampling device for fixed-bed pyrolysis gasification gas tar, comprising a sampling cavity, wherein the left inner wall and the right inner wall of the sampling cavity are respectively provided with at least one left tower plate and at least one right tower plate, wherein the left tower plate and the right tower plate are both inclined downward, and the two are alternately arranged to form a left-right reciprocating flow channel;

[0009] The sampling cavity is provided with a sampling inlet, a tar outlet, and a combustible gas outlet respectively; the sampling inlet is located at the lower part of the sampling cavity, and is used to introduce the tar of the fixed bed pyrolysis gasification gas; the tar outlet is sealedly connected with a detachable tar collecting bottle, the tar outlet is away from the sampling inlet and is located at the bottom of the sampling cavity, and is directly opposite to the downward sloping part of the lowest tower plate, and the tar collecting bottle is used to collect the melted tar; the combustible gas outlet is used to connect to the air bag for collecting combustible gas, and is located at the top of the sampling cavity, and is directly opposite to the upward sloping part of the highest tower plate;

[0010] A heating element controlled by a temperature control component is arranged inside and / or outside the sampling cavity to control the internal temperature of the sampling cavity.

[0011] The portable sampling device described in the present invention, on the one hand, increases the flow path of the fixed bed pyrolysis gasification gas tar through the left-right reciprocating flow channel formed by at least one left tower plate and at least one right tower plate, and on the other hand, effectively controls the internal temperature of the sampling cavity by providing a heating element controlled by a temperature control component. The combined effect of the two aspects ensures the condensation effect of the tar during the sampling process, thereby ensuring the effectiveness and accuracy of the sampling.

[0012] The portable sampling device of the present invention has a compact design and is easy to operate. It can efficiently and conveniently perform tar and combustible gas sampling, reduce environmental pollution, provide optimization measures for the production process, and can be used in different fixed bed pyrolysis devices with strong adaptability.

[0013] It should be noted that, in the present invention, the bottom plate is not limited to be the left plate or the right plate, and the vertical height is used as the only criterion for judgment. The downward inclined portion of the bottom plate is away from the inner wall of the sampling cavity. Similarly, the top plate is not limited to be the left plate or the right plate, and the vertical height is used as the only criterion for judgment. The upward inclined portion of the top plate is close to the inner wall of the sampling cavity.

[0014] It should be noted that the sampling chamber described in the present invention must ensure the airtightness during use. Based on the downward tilting setting of at least one left tower plate and at least one right tower plate, the sampling chamber is often an irregular cube. For the convenience of taking, a regular cube shell can be added to the outside of the sampling chamber to provide mechanical support for the sampling chamber.

[0015] As a preferred technical solution of the present invention, the angle between the left tower plate and the horizontal direction is 10-20 degrees, for example, 10 degrees, 12 degrees, 14 degrees, 15 degrees, 17 degrees, 19 degrees or 20 degrees, and the angle between the right tower plate and the horizontal direction is 10-20 degrees, for example, 10 degrees, 12 degrees, 14 degrees, 15 degrees, 17 degrees, 19 degrees or 20 degrees.

[0016] As a preferred technical solution of the present invention, the heating element includes a semiconductor refrigeration sheet, and the semiconductor refrigeration sheet is attached to the outer wall of the sampling cavity. Preferably, the semiconductor refrigeration sheet is almost entirely attached to the outer wall of the sampling cavity, so as to evenly and effectively control the internal temperature of the sampling cavity.

[0017] As a preferred technical solution of the present invention, the sampling inlet is provided with an inlet pipeline with an inlet control valve, and insulation cotton is provided on the inlet pipeline to prevent tar from condensing before entering the sampling cavity and avoid clogging the inlet pipeline.

[0018] As a preferred technical solution of the present invention, the combustible gas outlet is provided with a combustible gas outlet pipeline having an outlet control valve and an outlet flow meter.

[0019] As a preferred technical solution of the present invention, the tar outlet and the tar collecting bottle are detachably connected via threads.

[0020] In the present invention, the detachable tar collection bottle can be replaced to perform separate sampling to ensure the accuracy and effectiveness of sampling.

[0021] The second object of the present invention is to provide a portable sampling method for fixed-bed pyrolysis gasification gas tar, using the portable sampling device for fixed-bed pyrolysis gasification gas tar described in the first object, comprising the following steps:

[0022] The gas sampling outlet pipeline in the fixed bed pyrolysis gasification production is connected to the sampling inlet, the tar outlet is sealed with the tar collection bottle, and an air bag is connected to the combustible gas outlet to collect the combustible gas;

[0023] The internal temperature of the sampling cavity is adjusted to the condensation temperature by a heating element controlled by a temperature control component, the sampling inlet is opened, a quantitative fixed bed pyrolysis gasification gas tar is introduced, the sampling inlet is closed, the combustible gas outlet is closed, the outlet of the air bag is closed and the air bag containing the combustible gas is removed;

[0024] The internal temperature of the sampling cavity is adjusted to the melting temperature by a heating element controlled by a temperature control component, so that the condensed tar in the sampling cavity is melted and drips into the tar collection bottle along the alternately arranged left and right tower plates; when no more melted tar drips into the tar collection bottle, the tar collection bottle is removed and sealed;

[0025] Send the gas bag containing combustible gas and the tar collection bottle containing tar to the inspection room for testing.

[0026] As a preferred technical solution of the present invention, before the internal temperature of the sampling cavity is adjusted to the condensation temperature, the portable sampling method also includes a leakage check: the gas sampling outlet pipeline in the fixed bed pyrolysis gasification production is connected to the sampling inlet, the tar outlet is sealed with the tar collection bottle, the combustible gas outlet is closed, and the fixed bed pyrolysis gasification gas tar is introduced to check for leakage; after the leakage check is qualified, the sampling inlet is closed, and an air bag is connected to the combustible gas outlet to collect the combustible gas.

[0027] As a preferred technical solution of the present invention, the portable sampling method also includes a cleaning process: after the sampling is completed, the tar outlet is closed, the sampling inlet is closed, and the sampling inlet is connected to the high-pressure steam outlet; the internal temperature of the sampling cavity is adjusted to the cleaning temperature by a heating element controlled by a temperature control component, the sampling inlet is opened, and the interior of the sampling cavity is flushed.

[0028] As a preferred technical solution of the present invention, the condensation temperature is -10 to 15°C, for example, -10°C, -5°C, 0°C, 5°C, 8°C, 10°C or 15°C, etc., the melting temperature is 60 to 65°C, for example, 60°C, 61°C, 62°C, 63°C, 64°C or 65°C, etc., and the cleaning temperature is 105 to 110°C, for example, 105°C, 106°C, 107°C, 108°C, 109°C or 110°C, etc.

[0029] Compared with the prior art solutions, the present invention has at least the following beneficial effects:

[0030] (1) The portable sampling device of the present invention has a compact design and is easy to operate. It can efficiently and conveniently sample tar and combustible gas. It can sample and analyze tar and combustible gas in the fixed bed production process to provide sampling data, thereby optimizing the production process of sludge pyrolysis and gasification, and effectively reducing the pollution of tar and other substances to the environment;

[0031] (2) The portable sampling device of the present invention ensures the condensation effect of tar during the sampling process by combining a temperature control component with a heating element, thereby ensuring the effectiveness and accuracy of sampling; at the same time, the sampling cavity has an adjustable temperature range, which can be used to condense tar, increase the fluidity of tar, and clean the sampling cavity, thereby ensuring that there is no tar in the combustible gas obtained later, thereby avoiding damage to related instruments involved in subsequent analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of a portable sampling device for fixed bed pyrolysis gasification gas tar according to Example 1 of the present invention;

[0033] Figure 2 It is a front view of the portable sampling device for fixed bed pyrolysis gasification gas tar according to Example 1 of the present invention;

[0034] In the figure: 1. Inlet pipeline; 2. Insulation cotton; 3. Inlet control valve; 4. Sampling chamber; 5. Heating element; 6. Tower plate; 7. Combustible gas outlet pipeline; 8. Outlet control valve; 9. Outlet flow meter; 10. Tar outlet; 11. Tar collection bottle; 12. Temperature control component. DETAILED DESCRIPTION

[0035] To make the technical solution, purpose and advantages of the present invention clearer, the present invention is further described in detail below through specific implementation examples and in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components. For the electrical and communication fields, it can be a wired connection or a wireless connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Example 1

[0039] This embodiment provides a portable sampling device for fixed bed pyrolysis gasification gas tar, such as Figure 1 and Figure 2 As shown, it includes a sampling chamber 4, and the left inner wall and the right inner wall of the sampling chamber 4 are respectively provided with a left tower plate and a right tower plate. Figure 1 and Figure 2 The left tray and the right tray are not distinguished in the figure, and are uniformly marked as tray 6. The left tray and the right tray are both inclined downward, and the two are alternately arranged to form a left-right reciprocating flow channel; the angle between the left tray and the horizontal direction is 15 degrees, and the angle between the right tray and the horizontal direction is 15 degrees;

[0040] The sampling cavity 4 is provided with a sampling inlet, a tar outlet 10, and a combustible gas outlet; the sampling inlet is provided with an inlet pipeline 1 with an inlet control valve 3, and a heat preservation cotton 2 is provided on the inlet pipeline 1; the combustible gas outlet is provided with a combustible gas outlet pipeline 7 with an outlet control valve 8 and an outlet flow meter 9; the outlet flow meter 9 is a gas volume flow meter; the sampling inlet is located at the lower part of the sampling cavity 4, and the side wall of the sampling cavity below the sampling inlet is arranged in an inclined shape, and the angle with the horizontal direction is 15 degrees, which can effectively avoid the condensation and blockage of tar at the sampling inlet, and can also facilitate the melted tar to flow smoothly into the tar collection bottle 11;

[0041] The outside of the sampling cavity 4 is attached with a heating element 5 controlled by a temperature control component 12. The heating element 5 includes a plurality of semiconductor cooling sheets evenly distributed outside the sampling cavity 4, so that the internal temperature of the sampling cavity 4 can be evenly and effectively controlled.

[0042] The tar outlet 10 is sealedly connected to a detachable tar collecting bottle 11 through threads. The tar outlet 10 is away from the sampling inlet and is located at the bottom of the sampling cavity, and is directly opposite to the downward slanting position of the lowest tower plate 6. The tar collecting bottle 11 is used to collect melted tar; the combustible gas outlet pipeline 7 corresponding to the combustible gas outlet is used to connect to an air bag for collecting combustible gas, and is located at the top of the sampling cavity 4, and is directly opposite to the upward slanting position of the highest tower plate 6; a transparent glass tube filled with white cotton is provided between the combustible gas outlet pipeline 7 and the air bag for collecting combustible gas;

[0043] like Figure 1 and Figure 2 As shown, the sampling chamber 4 described in this embodiment must ensure airtightness during use. Based on the downwardly inclined tower plate 6, the sampling chamber 4 is an irregular cube. For easy handling, a regular cube shell is added to the outside of the sampling chamber 4 in this embodiment.

[0044] Application Example 1

[0045] This application example provides a portable sampling method for fixed-bed pyrolysis gasification gas tar, using the portable sampling device for fixed-bed pyrolysis gasification gas tar described in Example 1, including the following steps:

[0046] First, connect the gas sampling outlet pipeline and the inlet pipeline in the sludge fixed bed pyrolysis gasification production, connect the tar collection bottle to the sampling chamber through threads, close the outlet control valve of the combustible gas outlet pipeline, open the inlet control valve first, and then open the valve on the sampling outlet pipeline on the fixed bed, and check whether there is a leak by checking whether there are bubbles at the connection with soapy water; after the leak detection is completed, first close the valve on the sampling outlet pipeline on the fixed bed, then close the inlet control valve, and connect the air bag to the combustible gas outlet;

[0047] Adjust the temperature of the sampling chamber to 0°C. When the temperature of the sampling chamber drops to about 0°C, open the inlet control valve and the valve on the sampling outlet pipeline on the fixed bed, adjust the outlet control valve on the combustible gas outlet to 10L / min, collect the time for 10 minutes, close the valve, inlet control valve and outlet control valve on the sampling outlet pipeline on the fixed bed, close the outlet of the air bag, and remove the air bag;

[0048] Adjust the temperature of the sampling cavity to 60℃. When no tar drips into the tar collection bottle from the tar outlet, cover the tar collection bottle tightly and send the gas bag containing combustible gas and the collection bottle containing tar to the inspection room for testing.

[0049] After sampling, seal the tar outlet, connect the combustible gas inlet to the high-pressure steam outlet, and when the sampling chamber temperature rises to 105°C, open the inlet control valve and flush the inside of the chamber. When the outlet liquid becomes transparent and clear without obvious yellow color, it is clean, and the entire sampling and cleaning work is completed.

[0050] Since the portable sampling device is equipped with a transparent glass tube filled with white cotton in front of the air bag, the white cotton did not turn yellow during the entire sampling process, indicating that the portable sampling method of this application example is effective.

[0051] In summary, the present invention provides a portable sampling device and a portable sampling method for fixed-bed pyrolysis gasification gas tar. The portable sampling device includes a sampling cavity. On the one hand, the flow path of the fixed-bed pyrolysis gasification gas tar is increased by a left-right reciprocating flow channel formed by at least one left tower plate and at least one right tower plate. On the other hand, the internal temperature of the sampling cavity is effectively controlled by setting a heating element controlled by a temperature control component. Under the combined effect of the two aspects, the condensation effect of the tar during the sampling process is ensured, and the effectiveness and accuracy of the sampling are guaranteed. Moreover, the portable sampling device of the present invention is easy to use, low in cost, and the overall system is small. It can be portable and mobile, and has the advantage of being suitable for use under different working conditions. It can be used in fixed-bed pyrolysis gasification industrial processes of carbon-containing matrices such as sludge, biomass, coal, and garbage.

[0052] The present invention illustrates the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the components selected by the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0053] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0054] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0055] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A portable sampling device for fixed bed pyrolysis gasification gas tar, characterized in that: It comprises a sampling cavity, wherein the left inner wall and the right inner wall of the sampling cavity are respectively provided with at least one left tower plate and at least one right tower plate, the left tower plate and the right tower plate are both inclined downward, and the two are alternately arranged to form a left-right reciprocating flow channel; The sampling cavity is provided with a sampling inlet, a tar outlet, and a combustible gas outlet respectively; the sampling inlet is located at the lower part of the sampling cavity, and is used to introduce the tar of the fixed bed pyrolysis gasification gas; the tar outlet is sealedly connected with a detachable tar collecting bottle, the tar outlet is away from the sampling inlet and is located at the bottom of the sampling cavity, and is directly opposite to the downward sloping part of the lowest tower plate, and the tar collecting bottle is used to collect the melted tar; the combustible gas outlet is used to connect to the air bag for collecting combustible gas, and is located at the top of the sampling cavity, and is directly opposite to the upward sloping part of the highest tower plate; A heating element controlled by a temperature control component is arranged inside and / or outside the sampling cavity to control the internal temperature of the sampling cavity.

2. The portable sampling device for fixed bed pyrolysis gasification gas tar according to claim 1, characterized in that: The angle between the left tower plate and the horizontal direction is 10-20 degrees, and the angle between the right tower plate and the horizontal direction is 10-20 degrees.

3. The portable sampling device for fixed bed pyrolysis gasification gas tar according to claim 1, characterized in that: The heating element comprises a semiconductor cooling sheet, and the semiconductor cooling sheet is attached to the outer wall of the sampling cavity.

4. The portable sampling device for fixed bed pyrolysis gasification gas tar according to claim 1, characterized in that: The sampling inlet is provided with an inlet pipeline with an inlet control valve, and the inlet pipeline is provided with heat-insulating cotton.

5. The portable sampling device for fixed bed pyrolysis gasification gas tar according to claim 1, characterized in that: The combustible gas outlet is provided with a combustible gas outlet pipeline with an outlet control valve and an outlet flow meter.

6. The portable sampling device for fixed bed pyrolysis gasification gas tar according to claim 1, characterized in that: The tar outlet is detachably connected to the tar collecting bottle via threads.

7. A portable sampling method for fixed bed pyrolysis gasification gas tar, characterized in that: The portable sampling device for fixed bed pyrolysis gasification gas tar according to any one of claims 1 to 6 comprises the following steps: The gas sampling outlet pipeline in the fixed bed pyrolysis gasification production is connected to the sampling inlet, the tar outlet is sealed with the tar collection bottle, and an air bag is connected to the combustible gas outlet to collect the combustible gas; The internal temperature of the sampling cavity is adjusted to the condensation temperature by a heating element controlled by a temperature control component, the sampling inlet is opened, a quantitative fixed bed pyrolysis gasification gas tar is introduced, the sampling inlet is closed, the combustible gas outlet is closed, the outlet of the air bag is closed and the air bag containing the combustible gas is removed; The internal temperature of the sampling cavity is adjusted to the melting temperature by a heating element controlled by a temperature control component, so that the condensed tar in the sampling cavity is melted and drips into the tar collection bottle along the alternately arranged left and right tower plates; when no more melted tar drips into the tar collection bottle, the tar collection bottle is removed and sealed; Send the gas bag containing combustible gas and the tar collection bottle containing tar to the inspection room for testing.

8. The portable sampling method for fixed bed pyrolysis gasification gas tar according to claim 7, characterized in that: Before adjusting the internal temperature of the sampling cavity to the condensation temperature, the portable sampling method also includes a leakage check: connecting the gas sampling outlet pipeline in the fixed bed pyrolysis gasification production with the sampling inlet, sealing the tar outlet with the tar collection bottle, closing the combustible gas outlet, introducing the fixed bed pyrolysis gasification gas tar, and checking for leakage; after the leakage check is qualified, closing the sampling inlet, connecting an air bag to the combustible gas outlet to collect the combustible gas.

9. The portable sampling method for fixed bed pyrolysis gasification gas tar according to claim 7 or 8, characterized in that: The portable sampling method also includes a cleaning process: after the sampling is completed, the tar outlet is closed, the sampling inlet is closed, and the sampling inlet is connected to the high-pressure steam outlet; the internal temperature of the sampling cavity is adjusted to the cleaning temperature by a heating element controlled by a temperature control component, the sampling inlet is opened, and the interior of the sampling cavity is flushed.

10. The portable sampling method for fixed bed pyrolysis gasification gas tar according to claim 9, characterized in that: The condensation temperature is -10 to 15°C, the melting temperature is 60 to 65°C, and the cleaning temperature is 105 to 110°C.

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