Device for desublimation, collection and recycling of new material sintering tail gas

Abstract

The invention relates to a new material sintering tail gas desublimation collecting and recycling device which comprises a treatment cylinder and a ventilation part used for enabling tail gas to flow to the inner side and the outer side of the treatment cylinder, and further comprises a tail gas desublimation assembly arranged in the treatment cylinder, and the tail gas desublimation assembly comprises a plurality of annular condensation pipes arranged in a concentric circle mode; the radiuses of the annular condensation pipes are different; a tube liquid assembly; and the two first cleaning assemblies are oppositely arranged on the tail gas desublimation assembly, each first cleaning assembly comprises a cleaning part and a rotating part, each cleaning part comprises a scraping piece arranged on the surface of the annular condensation pipe in a sleeving mode, and the rotating parts are used for driving the scraping pieces to move towards the annular condensation pipe in a circumferential track mode. By means of the desublimation device, desublimation solid materials gathered in the treatment barrel can be effectively cleaned and collected, excessive gathering of solid high-condensation-point substances is avoided, blockage of a pipeline is avoided, collection of the solid high-condensation-point substances is facilitated, and the desublimation efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of gas recovery, and in particular to a device for collecting and reusing the sublimation of tail gas from sintering of new materials. Background Art

[0002] Substances that are easy to condense are often separated and captured using a desublimation device, but existing desublimation devices often have problems such as inability to operate continuously and low desublimation efficiency, especially when the gas contains less easily condensed substances, the desublimation effect is often unsatisfactory. When sintering some materials, the tail gas often contains some high-condensation-point recyclable gases. In the conventional tail gas treatment process, this part of the high-condensation-point substances will condense in the pipeline or the tail gas absorption tower, which is not only not conducive to the capture of these high-condensation-point substances but also causes the tail gas treatment system to be blocked. The workload of clearing the blockage is not only very huge, but it will also cause the entire reaction system to be unable to operate continuously, thus causing great inconvenience to production. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a device for collecting and reusing the condensation and sublimation of the tail gas from the sintering of new materials. The specific technical scheme is as follows:

[0004] A device for collecting and reusing tail gas desublimation from sintering of new materials, comprising a treatment tube and a venting portion for circulating tail gas inside and outside the treatment tube, and also comprising:

[0005] An exhaust gas desublimation component is arranged inside the treatment cylinder, and the exhaust gas desublimation component includes a plurality of annular condensing tubes arranged in concentric circles, and the radii of the annular condensing tubes are different;

[0006] A pipe-liquid assembly, which is used to continuously circulate low-temperature cooling liquid from the outside into each annular condenser tube to cool the annular condenser tube;

[0007] Two sets of cleaning components are arranged opposite to each other on the exhaust gas desublimation component. The cleaning component includes a cleaning part and a rotating part. The cleaning part includes a scraping member sleeved on the surface of the annular condenser tube. The rotating part is used to drive the scraping member to move in a circumferential trajectory toward the annular condenser tube.

[0008] As an improvement of the above technical solution: the inner cavity of the treatment cylinder is conically arranged and has a large mouth end and a small mouth end, the ventilation portion includes a plurality of inlet pipes arranged on the large mouth end, a plurality of the inlet pipes are arranged in a circular array on the large mouth end, the small mouth end has a connecting pipe, a valve is installed on the connecting pipe, the plurality of annular condensing pipes are axially arranged in the treatment cylinder, and the radius of the plurality of annular condensing pipes gradually decreases from the large mouth end to the small mouth end, so that the exhaust gas desublimation assembly as a whole forms a conical arrangement that is compatible with the inner cavity of the treatment cylinder.

[0009] As an improvement of the above technical solution: the scraper includes an annular cleaning block, the surface of the annular condenser is provided with a plurality of arc grooves, and the arc grooves are circumferentially arranged around the surface of the annular condenser, and the bottom circular array of the annular cleaning block has a plurality of arc cleaning rods adapted to the arc grooves, when the annular cleaning block moves circumferentially around the surface of the annular condenser, the arc cleaning rods can scrape off the sublimated solid materials on the surface of the arc grooves.

[0010] As an improvement of the above technical solution: it also includes a material passing component, the bottom wall of the processing cylinder is provided with a strip-shaped material passing port, the material passing component includes a blocking block adapted to the strip-shaped material passing port and an electric telescopic rod installed on the bottom of the processing cylinder, the blocking block is fixedly connected to the output rod of the electric telescopic rod, and the blocking block is driven by the electric telescopic rod output rod to block or not block the strip-shaped material passing port.

[0011] As an improvement of the above technical solution: one of the rotating parts includes a first driving motor, a first connecting column and a first connecting plate, the first driving motor is located at the large-mouth end, and the first driving motor is connected and installed inside the treatment cylinder through a fixed mounting frame, one end of the first connecting column is connected to the output shaft of the first connecting column, the other end of the first connecting column is connected to the first connecting plate, the first connecting plate is connected to the adjacent plurality of annular cleaning blocks, and the first connecting column and the annular condenser are arranged on the same concentric circle;

[0012] The other rotating part includes a second driving motor, a second connecting column and a second connecting plate. The second driving motor is located at the small mouth end and is installed inside the processing cylinder through a fixed mounting bracket. One end of the second connecting column is connected to the output shaft of the second connecting column, and the other end of the second connecting column is connected to the second connecting plate. The second connecting plate is connected to multiple adjacent annular cleaning blocks, and the second connecting column and the annular condenser are arranged in the same concentric circle.

[0013] As an improvement of the above technical solution: it also includes a cleaning component 2, which includes at least one strip cleaning block arranged on the inner wall of the treatment cylinder, and the strip cleaning block extends in the direction from the large mouth end to the small mouth end, and the strip cleaning block is connected to one of the annular cleaning blocks.

[0014] As an improvement of the above technical solution: the pipe-liquid assembly includes a liquid inlet pipe, a liquid outlet pipe and a liquid passing pipe, one end of the liquid inlet pipe is connected to the external coolant, the other end of the liquid inlet pipe is connected to the interior of the annular condenser with the smallest diameter, one end of the liquid outlet pipe is connected to the interior of the annular condenser with the largest diameter, and the other end of the liquid outlet pipe is used to flow the coolant out to the outside, and adjacent annular condensers are connected via the liquid passing pipe.

[0015] As an improvement of the above technical solution: the treatment tubes are provided with two groups, and the two groups of treatment tubes are symmetrically connected to the two ends of the connecting pipe.

[0016] As an improvement of the above technical solution: it also includes a material receiving box, and the material receiving box is arranged below the processing cylinder.

[0017] The beneficial effects of the present invention are:

[0018] 1. When the tail gas is to be condensed and collected for treatment, the tail gas is collected and passed through multiple inlet pipes into the interior of one of the treatment tubes. At the same time, the low-temperature coolant is continuously circulated to the multiple annular condensers through the running pipe-liquid component to cool the surfaces of the multiple annular condensers. The low temperature around the annular condensers will be transmitted to the tail gas. Most of the high-freezing-point substances to be recovered in the tail gas will evenly contact the surfaces of the multiple annular condensers and be condensed into solid materials. The solid materials will gather in the arc grooves on the annular condensers. A part of the high-freezing-point substances to be recovered in the tail gas will contact the inner wall surface of the treatment tube and be condensed into solid materials, thereby effectively condensing the recycled materials in the tail gas into solid materials and gathering them in the interior of the treatment tube, and the tail gas substances can be effectively recovered.

[0019] 2. When the materials accumulated inside the treatment tube need to be cleaned and collected, the blocking block is driven downward away from the treatment tube by running the electric telescopic rod, and then the rotating part is controlled to start, so that the rotating part drives multiple annular cleaning blocks to move downward circumferentially on the surfaces of multiple annular condensing tubes, so that the materials accumulated on the arc groove are scraped off along its track by the arc cleaning rod, and the strip cleaning block scrapes the solid materials on the inside of the treatment tube. The solid materials scraped off on the arc groove will fall onto the inner wall of the treatment tube. As the strip cleaning block rotates, the materials on the inner wall of the treatment tube are cleaned and enter the strip material passing port, and then fall into the material receiving box, which can effectively clean and collect the condensed solid materials accumulated inside the treatment tube, avoid excessive accumulation of solid high-condensation-point substances, avoid pipeline blockage, and facilitate the collection of solid high-condensation-point substances, with high condensation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 The structure of the tail gas desublimation component in the present invention is shown in FIG. Figure 1 ;

[0022] Figure 3 The structure of the tail gas desublimation component in the present invention is shown in FIG. Figure 2 ;

[0023] Figure 4 It is a schematic cross-sectional structure diagram of the annular condenser in the present invention;

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of the annular condenser in the present invention.

[0025] Figure numerals: 1. treatment cylinder; 100. strip-shaped material passage; 2. inlet pipe; 3. electric telescopic rod; 31. material blocking block; 4. connecting pipe; 41. valve; 5. strip-shaped cleaning block; 6. annular condenser; 61. arc-shaped groove; 62. liquid inlet pipe; 63. liquid outlet pipe; 64. liquid passage pipe; 7. first drive motor; 71. first connecting column; 72. first connecting plate; 8. annular cleaning block; 81. arc-shaped cleaning rod; 9. second drive motor; 91. second connecting column; 92. second connecting plate; 11. material receiving box. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] Example:

[0028] This embodiment provides a device for collecting and reusing the condensation sublimation of the tail gas from the sintering of new materials. Figure 1-Figure 5 , including a treatment tube 1 and a ventilation part for circulating the exhaust gas inside and outside the treatment tube 1, and also including: an exhaust gas condensation component arranged inside the treatment tube 1, the exhaust gas condensation component includes a plurality of concentrically arranged annular condensation tubes 6, and the radius of each annular condensation tube 6 is different. Specifically, the annular condensation tube 6 is made of a material with good thermal conductivity, such as aluminum, copper, etc.; a pipe liquid component, the pipe liquid component is used to continuously circulate the external low-temperature cooling liquid to the inside of each annular condensation tube 6 to cool the annular condensation tube 6; two groups of cleaning components one arranged opposite to each other on the exhaust gas condensation component, the cleaning component one includes a cleaning part and a rotating part, the cleaning part includes a scraper mounted on the surface of the annular condensation tube 6, specifically, a scraper is correspondingly arranged on the surface of each annular condensation tube 6, and the rotating part is used to drive the scraper to move in a circumferential trajectory toward the annular condensation tube 6, specifically, the annular condensation tube 6 and the inner wall of the treatment tube 1 are made of a material with good thermal conductivity, such as aluminum or copper, which is convenient for cooling them.

[0029] In an optional embodiment: the inner cavity of the treatment tube 1 is conically arranged and has a large end and a small end, the ventilation part includes a plurality of inlet pipes 2 arranged on the large end, and the plurality of inlet pipes 2 are arranged in a circular array on the large end, so that the exhaust gas can be evenly introduced into the outer periphery of the inner cavity of the treatment tube 1 through the inlet pipes 2, and the small end has a connecting pipe 4, and a valve 41 is installed on the connecting pipe 4. The valve can be a valve that can control the flow rate of the connecting pipe 4 to facilitate the control of the exhaust gas outflow in the treatment tube 1, and a plurality of annular condensers 6 are arranged axially along the treatment tube 1, and the radius of the plurality of annular condensers 6 gradually decreases from the large end to the small end, so that the exhaust gas desublimation component as a whole forms a conical setting that is compatible with the inner cavity of the treatment tube 1, so that the exhaust gas can gradually contact each annular condenser 6 along the inner cavity of the treatment tube 1, and the exhaust gas is evenly condensed into solid material on the surface of the annular condenser 6, and the solid material is convenient to collect.

[0030] In an optional embodiment: the scraping member includes an annular cleaning block 8, the surface of the annular condenser 6 is provided with a plurality of arc grooves 61, and the arc grooves 61 are circumferentially arranged around the surface of the annular condenser 6, and the bottom circular array of the annular cleaning block 8 has a plurality of arc cleaning rods 81 adapted to the arc grooves 61. When the annular cleaning block 8 moves circumferentially around the surface of the annular condenser 6, the arc cleaning rods 81 can scrape off the sublimated solid materials on the surface of the arc grooves 61.

[0031] In an optional embodiment: it also includes a material passing component, the bottom wall of the processing cylinder 1 is provided with a strip-shaped material passing port 100, the material passing component includes a blocking block 31 adapted to the strip-shaped material passing port 100 and an electric telescopic rod 3 installed at the bottom of the processing cylinder 1, the blocking block 31 is fixedly connected to the output rod of the electric telescopic rod 3, and the blocking block 31 is driven by the extension and retraction of the output rod of the electric telescopic rod 3 to seal or unblock the strip-shaped material passing port 100. Specifically, a sealing ring may also be provided on the side of the strip-shaped material passing port 100 to improve the sealing performance of the blocking block 31 when it is connected to the strip-shaped material passing port 100.

[0032] In an optional embodiment: one of the rotating parts includes a first drive motor 7, a first connecting column 71 and a first connecting plate 72, the first drive motor 7 is located at the large end, and the first drive motor 7 is connected to the inside of the treatment cylinder 1 through a fixed mounting frame, one end of the first connecting column 71 is connected to the output shaft of the first connecting column 71, the other end of the first connecting column 71 is connected to the first connecting plate 72, the first connecting plate 72 is connected to a plurality of adjacent annular cleaning blocks 8, and the first connecting column 71 and the annular condenser pipe 6 are arranged in the same concentric circle;

[0033] The other rotating part includes a second drive motor 9, a second connecting column 91 and a second connecting plate 92. The second drive motor 9 is located at the small mouth end, and the second drive motor 9 is installed inside the treatment cylinder 1 through a fixed mounting frame. One end of the second connecting column 91 is connected to the output shaft of the second connecting column 91, and the other end of the second connecting column 91 is connected to the second connecting plate 92. The second connecting plate 92 is connected to multiple adjacent annular cleaning blocks 8, and the second connecting column 91 and the annular condenser 6 are arranged in the same concentric circle, so that the two rotating parts do not affect each other when controlling the operation of each cleaning part.

[0034] In an optional embodiment: it also includes a cleaning component 2, which includes at least one strip cleaning block 5 arranged on the inner wall of the treatment tube 1, and the strip cleaning block 5 extends from the large mouth end to the small mouth end. The strip cleaning block 5 is connected to one of the annular cleaning blocks 8, so that the strip cleaning block 5 can scrape off the sublimated solid material on the inner wall of the treatment tube 1.

[0035] In an optional embodiment: the pipe-liquid assembly includes a liquid inlet pipe 62, a liquid outlet pipe 63 and a liquid through pipe 64, one end of the liquid inlet pipe 62 is connected to the external coolant, the other end of the liquid inlet pipe 62 is connected to the interior of the annular condenser 6 with the smallest diameter, one end of the liquid outlet pipe 63 is connected to the interior of the annular condenser 6 with the largest diameter, and the other end of the liquid outlet pipe 63 is used to flow the coolant out to the outside, and adjacent annular condenser tubes 6 are connected through the liquid through pipe 64. Specifically, a partition may be provided inside each annular condenser tube 6, and the cavity inside the annular condenser tube 6 is divided into two cavities by the partition, one cavity is connected to the corresponding pipeline to facilitate the entry of coolant, and the other cavity is connected to the corresponding pipeline to facilitate the outflow of coolant.

[0036] In an optional embodiment: two groups of treatment tubes 1 are provided, and the two groups of treatment tubes 1 are symmetrically connected at both ends of the connecting pipe 4. After the exhaust gas enters one of the treatment tubes 1 for condensation, it can also enter the other treatment tube 1 for further condensation, so that the exhaust gas is fully condensed into solid material.

[0037] In an optional embodiment: it also includes a material receiving box 11, which is arranged below the processing cylinder 1. The present application also includes a control, and the electric telescopic rod 3, the first drive motor 7 and the second drive motor 9 are wirelessly communicated or electrically connected with the controller to facilitate their control.

[0038] Specifically, when the tail gas is to be condensed and collected for treatment, the tail gas is collected and introduced into the interior of one of the treatment tubes 1 through multiple inlet pipes 2, and at the same time, the low-temperature coolant is continuously circulated into multiple annular condensing tubes 6 through the operation of the pipe-liquid assembly to cool the surfaces of the multiple annular condensing tubes 6, and the low temperature around the annular condensing tubes 6 will be transmitted to the tail gas. Most of the high-freezing point substances to be recovered in the tail gas will evenly contact the surfaces of the multiple annular condensing tubes 6 and be condensed into solid materials. The solid materials will gather in the arc grooves 61 on the annular condensing tubes 6, and a part of the high-freezing point substances to be recovered in the tail gas will contact the inner wall surface of the treatment tube 1 and be condensed into solid materials, thereby effectively condensing the materials to be recovered in the tail gas into solid materials and gathering them in the interior of the treatment tube 1, and the tail gas substances can be effectively recovered;

[0039] When the tail gas passes through the interior of a treatment tube 1 to condense into solid materials, a small amount of the remaining materials to be recovered in the tail gas enters the interior of the next treatment tube 1 through the connecting pipe 4 to condense into solid materials to be recovered, so that the tail gas can be recycled, and the rest of the tail gas will be discharged from the inlet pipe 2;

[0040] In the initial state, multiple annular cleaning blocks 8 are moved to the top of the annular condenser 6 by the rotating part. After a period of time, when the materials accumulated inside the treatment tube 1 need to be cleaned and collected, the blocking block 31 is driven downward away from the treatment tube 1 by running the electric telescopic rod 3, and then the rotating part is controlled to start, so that the rotating part drives multiple annular cleaning blocks 8 to move downward circumferentially on the surface of multiple annular condenser tubes 6, so that the materials accumulated on the arc groove 61 are scraped off along its track by the arc cleaning rod 81, and the strip cleaning block 5 scrapes off the solid materials on the inside of the treatment tube 1. The solid materials scraped off on the arc groove 61 will fall onto the inner wall of the treatment tube 1. As the strip cleaning block 5 rotates, the materials on the inner wall of the treatment tube 1 are cleaned and enter the strip material port 100, and then fall into the material receiving box 11, so that the sublimated solid materials accumulated inside the treatment tube 1 can be effectively cleaned and collected, avoiding excessive accumulation of solid high-freezing-point substances, avoiding pipeline blockage, and facilitating the collection of solid high-freezing-point substances, and the sublimation efficiency is relatively high.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for collecting and reusing the desublimation exhaust gas from the sintering of new materials, comprising a treatment tube (1) and a vent for circulating the exhaust gas inside and outside the treatment tube (1), characterized in that: Also includes: A tail gas desublimation component is arranged inside the treatment cylinder (1), the tail gas desublimation component comprises a plurality of annular condensation tubes (6) arranged in concentric circles, and the radii of the annular condensation tubes (6) are different; A pipe-liquid assembly, the pipe-liquid assembly being used to continuously circulate low-temperature cooling liquid from the outside into each annular condenser tube (6) to cool the annular condenser tube (6); Two sets of cleaning components are arranged opposite to each other on the tail gas desublimation component, and the cleaning component comprises a cleaning part and a rotating part. The cleaning part comprises a scraping member sleeved on the surface of the annular condenser tube (6), and the rotating part is used to drive the scraping member to move in a circumferential trajectory toward the annular condenser tube (6).

2. The device for collecting and reusing the condensation and sublimation of the exhaust gas from the sintering of new materials according to claim 1 is characterized by: The inner cavity of the treatment cylinder (1) is arranged in a conical shape and has a large end and a small end. The ventilation portion includes a plurality of inlet pipes (2) arranged on the large end. The plurality of inlet pipes (2) are arranged in a circular array on the large end. The small end has a connecting pipe (4). A valve (41) is installed on the connecting pipe (4). The plurality of annular condensing pipes (6) are arranged axially inside the treatment cylinder (1), and the radius of the plurality of annular condensing pipes (6) gradually decreases from the large end to the small end, so that the exhaust gas desublimation component as a whole forms a conical arrangement that is compatible with the inner cavity of the treatment cylinder (1).

3. The device for collecting and reusing the condensation and sublimation of the exhaust gas from the sintering of new materials according to claim 2 is characterized by: The scraping member comprises an annular cleaning block (8), the surface of the annular condenser (6) is provided with a plurality of arcuate grooves (61), and the arcuate grooves (61) are circumferentially arranged around the surface of the annular condenser (6), and the bottom circular array of the annular cleaning block (8) has a plurality of arcuate cleaning rods (81) adapted to the arcuate grooves (61). When the annular cleaning block (8) moves circumferentially around the surface of the annular condenser (6), the arcuate cleaning rods (81) can scrape off the solid material that has sublimated on the surface of the arcuate grooves (61).

4. The device for collecting and reusing the condensation and sublimation of the exhaust gas from the sintering of new materials according to claim 3 is characterized by: The invention also comprises a material passing assembly, wherein the bottom wall of the treatment cylinder (1) is provided with a strip-shaped material passing opening (100), and the material passing assembly comprises a material blocking block (31) adapted to the strip-shaped material passing opening (100) and an electric telescopic rod (3) installed at the bottom of the treatment cylinder (1), wherein the material blocking block (31) is fixedly connected to an output rod of the electric telescopic rod (3), and the electric telescopic rod (3) is telescopically driven to drive the material blocking block (31) to block or not block the strip-shaped material passing opening (100).

5. The device for collecting and reusing the condensation and sublimation of the exhaust gas from the sintering of new materials according to claim 4 is characterized by: One of the rotating parts comprises a first driving motor (7), a first connecting column (71) and a first connecting plate (72); the first driving motor (7) is located at the large-mouth end, and the first driving motor (7) is connected and installed inside the treatment cylinder (1) through a fixed mounting frame; one end of the first connecting column (71) is connected to the output shaft of the first connecting column (71); the other end of the first connecting column (71) is connected to the first connecting plate (72); the first connecting plate (72) is connected to a plurality of adjacent annular cleaning blocks (8); and the first connecting column (71) and the annular condensing pipe (6) are arranged in the same concentric circle; The other rotating part includes a second driving motor (9), a second connecting column (91) and a second connecting plate (92), wherein the second driving motor (9) is located at the small mouth end, and the second driving motor (9) is connected to the inside of the treatment cylinder (1) through a fixed mounting frame, one end of the second connecting column (91) is connected to the output shaft of the second connecting column (91), and the other end of the second connecting column (91) is connected to the second connecting plate (92), and the second connecting plate (92) is connected to a plurality of adjacent annular cleaning blocks (8), and the second connecting column (91) and the annular condenser (6) are arranged in the same concentric circle.

6. The device for collecting and reusing the condensation and sublimation of the exhaust gas from the sintering of new materials according to claim 5 is characterized by: It also includes a cleaning component 2, which includes at least one strip cleaning block (5) arranged on the inner wall of the treatment cylinder (1), and the strip cleaning block (5) is extended in the direction from the large end to the small end, and the strip cleaning block (5) is connected to one of the annular cleaning blocks (8).

7. The device for collecting and reusing the condensation and sublimation of the exhaust gas from the sintering of new materials according to claim 1 is characterized by: The pipe-liquid assembly comprises a liquid inlet pipe (62), a liquid outlet pipe (63) and a liquid passage pipe (64); one end of the liquid inlet pipe (62) is used to connect to external cooling liquid; the other end of the liquid inlet pipe (62) is connected to the interior of the annular condenser (6) with the smallest diameter; one end of the liquid outlet pipe (63) is connected to the interior of the annular condenser (6) with the largest diameter; the other end of the liquid outlet pipe (63) is used to allow the cooling liquid to flow out to the outside; adjacent annular condensers (6) are connected via the liquid passage pipe (64).

8. The device for collecting and reusing the condensation and sublimation of the exhaust gas from the sintering of new materials according to claim 6 is characterized by: The treatment tubes (1) are provided in two groups, and the two groups of treatment tubes (1) are symmetrically connected to the two ends of the connecting pipe (4).

9. The device for collecting and reusing the condensation and sublimation of the exhaust gas from the sintering of new materials according to claim 1 is characterized by: It also comprises a material receiving box (11), wherein the material receiving box (11) is arranged below the processing cylinder (1).

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