Calcium carbide adding device for wet acetylene generator

Abstract

The utility model provides a calcium carbide adding device of a wet acetylene generator, and belongs to the technical field of wet acetylene feeding. The technical problem to be solved is to provide the improvement of the hardware structure of the device for adding the calcium carbide into the wet acetylene generator. Comprising an acetylene generator, and a feeding port of the acetylene generator is sequentially connected with a feeding box feeder, a lower storage hopper, a lower valve, an upper storage hopper, an upper valve and a calcium carbide storage hopper from bottom to top; a calcium carbide storage hopper oil pressure scale is arranged at a discharge port of the calcium carbide storage hopper, two pressure gauges are arranged at the top of the upper storage hopper, an upper storage hopper wall vibrator is further arranged at the bottom of the upper storage hopper, and an upper storage hopper infrared level gage is arranged at a discharge port of the upper storage hopper; two pressure gauges are arranged at the top of the lower storage hopper, a lower storage hopper wall vibrator is further arranged at the bottom of the lower storage hopper, and a lower storage hopper infrared level gage is arranged at a discharge port of the lower storage hopper; the acetylene generator is applied to acetylene generators.

Description

Technical Field

[0001] The utility model provides a device for adding calcium carbide to a wet acetylene generator, belonging to the technical field of wet acetylene feeding. Background Art

[0002] At present, the process of adding calcium carbide to the wet acetylene generator is as follows:

[0003] After the upper storage hopper (V-4305A / B / C) of the acetylene generator is vented with nitrogen and passed (the tail gas discharged from the hopper is sent to the pressure swing adsorption device for qualified acetylene to be returned to dimerization after adsorption, and the separated qualified nitrogen is used to dilute the dimerization raw gas), the qualified calcium carbide (particle size 25mm~40mm, temperature less than 60℃) from the calcium carbide silo is conveyed to the top hopper of the acetylene generator through a belt, and the feeding valve is opened to put the calcium carbide in the feeding hopper into the upper storage hopper (V-4305). A / B / C), and then open the valve to put the calcium carbide in the upper calcium carbide storage hopper (V-4305A / B / C) into the lower storage hopper (V-4304), start the electromagnetic vibrator (M-4303A / B / C) to add the calcium carbide to the generator (R-4301A / B / C). The calcium carbide reacts with water to generate acetylene gas. This operation method is repeated more than 70 times a day (an average of 260 tons of calcium carbide is used every day). Based on the existing technology, there are three ways of adding materials:

[0004] 1. It is purely manual operation. The material level is judged by knocking each time, the pressure of the hopper is checked, exhaust is done manually before and after adding materials, sampling is done for analysis, and then the adding operation is performed.

[0005] 2. Use ordinary microwave level meter to insert into the calcium carbide storage hopper to detect the material level. This method is easy to damage (it can be damaged by the calcium carbide falling from above, although the material with good anti-smashing ability is selected), but the life span is limited, after all, it is smashed 150-200 times a day) and there are certain safety hazards. The exhaust before and after adding the material depends on the pressure and exhaust times to judge whether the exhaust is qualified. This exhaust method has relatively harsh conditions (equipment and pipelines are not blocked, and the nitrogen pressure is very stable), and there are certain defects in the practice process.

[0006] 3. The material level is judged by whether the upper and lower valves can be closed to judge whether the material has been used up. If the calcium carbide is stuck at the valve in this judgment method, an error signal will be given, resulting in a safety accident during the addition of materials.

[0007] The three existing charging technologies all have certain defects, which bring safety risks to the automatic charging of wet acetylene generators. Therefore, it is urgent to find or invent a device for safely and reliably adding calcium carbide to wet acetylene generators. Utility Model Content

[0008] In order to overcome the deficiencies in the prior art, the utility model aims to solve the technical problem of providing an improvement in the hardware structure of a device for adding calcium carbide to a wet acetylene generator.

[0009] In order to solve the above technical problems, the technical solution adopted by the utility model is: a device for adding calcium carbide to a wet acetylene generator, comprising an acetylene generator, wherein the feed port of the acetylene generator is connected to the discharge port of a feed box feeder, the feed port of the feed box feeder is connected to the discharge port of a lower storage hopper, the feed port of the lower storage hopper is connected to the discharge port of an upper storage hopper through a lower valve, the feed port of the upper storage hopper is connected to the discharge port of a calcium carbide storage hopper through an upper valve, and the feed port of the calcium carbide storage hopper is arranged below a belt feeder;

[0010] The discharge port of the calcium carbide storage hopper is provided with an oil pressure scale for the calcium carbide storage hopper, the top of the upper storage hopper is provided with a first pressure gauge for the upper storage hopper and a second pressure gauge for the upper storage hopper, the top of the upper storage hopper is connected with an exhaust pipe, the exhaust pipe is provided with an upper storage hopper nitrogen online detector and an upper storage hopper nitrogen exhaust valve, the bottom of the upper storage hopper is provided with an air inlet pipe, the air inlet pipe is provided with an upper storage hopper nitrogen inlet valve, the bottom of the upper storage hopper is also provided with an upper storage hopper wall vibrator, and an upper storage hopper infrared material level meter is provided at the discharge port of the upper storage hopper;

[0011] A first pressure gauge and a second pressure gauge of the lower hopper are arranged on the top of the lower hopper, an exhaust pipe is also arranged on the top of the lower hopper, an acetylene online detector and a lower hopper nitrogen exhaust valve are arranged on the exhaust pipe, an air inlet pipe is arranged at the bottom of the lower hopper, a lower hopper nitrogen inlet valve is arranged on the air inlet pipe, a lower hopper bin wall vibrator is also arranged at the bottom of the lower hopper, and a lower hopper infrared material level meter is arranged at the discharge port of the lower hopper.

[0012] The air inlet pipe and the air outlet pipe of the upper storage hopper and the lower storage hopper are respectively arranged on both sides of the corresponding storage hopper.

[0013] The infrared material level meter of the lower hopper is installed on the outer wall of the lower hopper, and the length of the infrared material level meter of the lower hopper inserted into the lower hopper is consistent with the thickness of the outer wall of the lower hopper.

[0014] The upper hopper infrared material level meter is installed on the outer wall of the upper hopper, and the length of the upper hopper infrared material level meter inserted into the upper hopper is consistent with the thickness of the outer wall of the upper hopper.

[0015] The infrared level meter of the lower hopper, the vibrator of the lower hopper wall, the acetylene online detector, the nitrogen exhaust valve of the lower hopper, the first pressure gauge of the lower hopper, the lower valve, the infrared level meter of the upper hopper, the vibrator of the upper hopper wall, the exhaust online detector of the upper hopper, the nitrogen exhaust valve of the upper hopper, the first pressure gauge of the upper hopper, the upper valve, the oil pressure scale of the calcium carbide hopper, the second pressure gauge of the upper hopper, the nitrogen intake valve of the upper hopper, the second pressure gauge of the lower hopper, the nitrogen intake valve of the lower hopper, the belt feeder, the feeding box feeder, and the control ends of the acetylene generator are respectively connected to the DCS system through wires.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the utility model solves the durability and accuracy problems of the level meter detection in the prior art by adopting a non-contact infrared level meter. At the same time, in order to ensure the accuracy of the material level, an oil pressure scale is added to assist in metering. The exhaust before and after feeding also adds two pressure detection points, which can increase the safety factor of the feeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of the device of the utility model;

[0019] In the figure: 1 is an infrared level meter for the lower hopper, 2 is a vibrator for the lower hopper wall, 3 is an acetylene online detector, 4 is a nitrogen exhaust valve for the lower hopper, 5 is a first pressure gauge for the lower hopper, 6 is a lower valve, 7 is an infrared level meter for the upper hopper, 8 is a vibrator for the upper hopper wall, 9 is an exhaust online detector for the upper hopper, 10 is a nitrogen exhaust valve for the upper hopper, 11 is a first pressure gauge for the upper hopper, 12 is an upper valve, 13 is a belt feeder, 14 is a calcium carbide hopper, 15 is an oil pressure scale for the calcium carbide hopper, 16 is a second pressure gauge for the upper hopper, 17 is an upper hopper, 18 is a nitrogen intake valve for the upper hopper, 19 is a second pressure gauge for the lower hopper, 20 is a lower hopper, 21 is a nitrogen intake valve for the lower hopper, 22 is a feeder for the feeding box, and 23 is an acetylene generator. DETAILED DESCRIPTION

[0020] like Figure 1 As shown, the utility model provides a device for adding calcium carbide to a wet acetylene generator, comprising an acetylene generator 23, the feed port of the acetylene generator 23 is connected to the discharge port of a feed box feeder 22, the feed port of the feed box feeder 22 is connected to the discharge port of a lower hopper 20, the feed port of the lower hopper 20 is connected to the discharge port of an upper hopper 17 via a lower valve 6, the feed port of the upper hopper 17 is connected to the discharge port of a calcium carbide hopper 14 via an upper valve 12, the feed port of the calcium carbide hopper 14 is arranged below a belt feeder 13, and calcium carbide is transported on the belt feeder 13.

[0021] The discharge port of the calcium carbide storage hopper 14 is provided with a calcium carbide storage hopper oil pressure scale 15, the top of the upper storage hopper 17 is provided with an upper storage hopper first pressure gauge 11 and an upper storage hopper second pressure gauge 16, the reliability of the pressure display is increased by double pressure gauge detection, and the top of the upper storage hopper 17 is connected to an exhaust pipe, the exhaust pipe is provided with an upper storage hopper nitrogen online detector 9 and an upper storage hopper nitrogen exhaust valve 10, the bottom of the upper storage hopper 17 is provided with an intake pipe, the intake pipe is provided with an upper storage hopper nitrogen intake valve 18, and the bottom of the upper storage hopper 17 is also provided with an upper storage hopper bin wall vibrator 8, an upper hopper infrared material level meter 7 is provided at the discharge port of the upper hopper 7; a lower hopper first pressure gauge 5 and a lower hopper second pressure gauge 19 are provided at the top of the lower hopper 20, an exhaust pipe is also provided at the top of the lower hopper 20, an acetylene online detector 3 and a lower hopper nitrogen exhaust valve 4 are provided on the exhaust pipe, an air intake pipe is provided at the bottom of the lower hopper 20, a lower hopper nitrogen intake valve 21 is provided on the air intake pipe, a lower hopper bin wall vibrator 2 is also provided at the bottom of the lower hopper 20, and a lower hopper infrared material level meter 1 is provided at the discharge port of the lower hopper 20. The above electrical components are all connected to the DCS system.

[0022] During installation, the air inlet and exhaust pipes of the upper hopper 17 and the lower hopper 20 are generally arranged on both sides of the hoppers, respectively, to facilitate the inlet and outlet of the gas. The infrared level meter 1 of the lower hopper is installed on the outer wall of the lower hopper 20, and its insertion length is consistent with the thickness of the equipment, and the error will not be greater than 5mm. In order to prevent calcium carbide from damaging and wearing the infrared detector, the transmission signal is emitted at the tip of the detector, and its emission angle is less than 5 degrees, so it will not be affected by the wall thickness of the equipment. At the same time, the range is within 5 meters, and the corresponding infrared receiver is installed on the opposite side. If a single level transmitter detects the level by infrared reflection, the certainty is very low (the reason is that the energy of the reflected line is reduced after absorption). The infrared penetration (only for calcium carbide) is used to pass through the material to reach another short receiver on the opposite side, which greatly improves the detection accuracy; the infrared level meter 7 of the upper hopper is installed on the outer wall of the upper hopper 17, and the installation method is consistent with the infrared level meter 1 of the lower hopper, which can ensure the accuracy and safety and effectiveness of the detection.

[0023] The principle of adding calcium carbide in the utility model is as follows:

[0024] During the normal start-up process, the feeder 22 of the feeding box continuously feeds the acetylene generator 23 to ensure that the acetylene generator 23 produces enough acetylene for the next process. When the infrared material level meter 1 of the lower hopper detects that the material level is empty, the lower hopper bin wall vibrator 2 is started to vibrate for a short period of time, and then the feeder 22 and the lower hopper bin wall vibrator 2 are stopped, and a delay period is set. The nitrogen exhaust valve 4 of the lower hopper is opened, and the acetylene online detector 3 of the lower hopper 20 is activated at the same time, and the nitrogen intake valve 21 of the lower hopper is opened. At the same time, the exhaust times are judged according to the first pressure gauge 5 of the lower hopper and the second pressure gauge 19 of the lower hopper. When the exhaust times reach the requirements, the data of the acetylene online detector 3 is comprehensively combined to give the instruction of whether to start opening the lower valve 6 to start discharging. At this time, the opening of the nitrogen intake valve 21 of the lower hopper is appropriately increased.

[0025] When the infrared level meter 7 of the upper hopper displays a red light (indicating that there is no calcium carbide in the upper hopper), start the upper hopper wall vibrator 8 to start vibrating, delay for a while, stop the upper hopper wall vibrator 8, and then close the lower valve 6, and then close the nitrogen exhaust valve 4 of the lower hopper, close the nitrogen inlet valve 21 of the lower hopper, and judge whether the valve is closed based on the first pressure gauge 5 of the lower hopper and the second pressure gauge 19 of the lower hopper. Open the nitrogen exhaust valve 10 of the upper hopper, and activate the upper hopper exhaust online detector 9 at the same time. According to the upper hopper first pressure gauge 11 and the upper hopper second pressure gauge 16, determine whether the lower valve 6 is closed. After a delay, open the nitrogen intake valve 18 of the upper hopper, exhaust nitrogen from the upper hopper 17, and comprehensively judge whether the exhaust is qualified according to the exhaust times and the data of the upper hopper exhaust online detector 9. Then determine to open the upper valve 12, and observe whether the data of the calcium carbide hopper oil pressure scale 15 meets the required value. If it meets the required value, open the upper valve 12 of the upper hopper 17 to discharge the material, and observe whether the upper hopper infrared material level meter 7 has received the Calcium carbide, at the same time, according to the data of the calcium carbide storage hopper oil pressure scale 15, if the calcium carbide storage hopper oil pressure scale 15 returns to zero, it means that the liquid level in the upper storage hopper has met the requirements, then close the upper valve 12, and the opening of the nitrogen exhaust valve 10 of the upper storage hopper remains unchanged during the discharge process, and slightly increase the opening of the nitrogen intake valve 18 of the upper storage hopper to continue exhausting. According to the exhaust times and the data of the upper storage hopper exhaust online detector 9, it is judged whether the exhaust of the upper storage hopper 17 is qualified. If it is qualified, close the nitrogen exhaust valve 10 and the nitrogen intake valve 18 of the upper storage hopper to maintain the pressure at a given value (according to the numerical judgment of the first pressure gauge 11 and the second pressure gauge 16 of the upper storage hopper). Check the display of the calcium carbide storage hopper oil pressure scale 15. If it is at a normal value, start the belt feeder 13 to feed the calcium carbide storage hopper 14 for standby use, and repeat this cycle.

[0026] The calculation method of exhaust times of the lower hopper 20 is as follows: open the nitrogen exhaust valve 4 of the lower hopper, open the nitrogen intake valve 21 of the lower hopper and continue to exhaust for a period of time, close the nitrogen intake valve 21 of the lower hopper, when the first pressure gauge 5 of the lower hopper and the second pressure gauge 19 of the lower hopper are close to the given value, it is calculated as one exhaust, and the nitrogen intake valve 21 of the lower hopper is opened again, and the number of repeated cycles reaches the specified value. The calculation method of exhaust times of the upper hopper 17 is the same.

[0027] The utility model uses an infrared radio frequency detector that does not directly contact the calcium carbide in the calcium carbide hopper, so there is no problem of breaking it or requiring special materials to manufacture it. At the same time, in order to ensure the accuracy of the material level, an oil pressure scale is added to assist in metering (to ensure the accuracy of the material level) and a safety is set. Exhaust before and after feeding, and two pressure detection points are added to increase the safety factor of the feeding process.

[0028] Regarding the specific structure of the utility model, it should be explained that the connection relationship between the various component modules adopted in the utility model is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring corresponding technical effects and solve the technical problems raised by the utility model without relying on the execution of corresponding software programs. The components, modules, models of specific components and the connection methods between each other appearing in the utility model, as well as the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A device for adding calcium carbide to a wet acetylene generator, comprising an acetylene generator (23), characterized in that: The feed port of the acetylene generator (23) is connected to the discharge port of the feed box feeder (22), the feed port of the feed box feeder (22) is connected to the discharge port of the lower storage hopper (20), the feed port of the lower storage hopper (20) is connected to the discharge port of the upper storage hopper (17) through the lower valve (6), the feed port of the upper storage hopper (17) is connected to the discharge port of the calcium carbide storage hopper (14) through the upper valve (12), and the feed port of the calcium carbide storage hopper (14) is arranged below the belt feeder (13); The discharge port of the calcium carbide storage hopper (14) is provided with a calcium carbide storage hopper oil pressure scale (15); the top of the upper storage hopper (17) is provided with an upper storage hopper first pressure gauge (11) and an upper storage hopper second pressure gauge (16); the top of the upper storage hopper (17) is connected to an exhaust pipe, on which an upper storage hopper nitrogen online detector (9) and an upper storage hopper nitrogen exhaust valve (10) are provided; the bottom of the upper storage hopper (17) is provided with an air intake pipe, on which an upper storage hopper nitrogen intake valve (18) is provided; the bottom of the upper storage hopper (17) is also provided with an upper storage hopper bin wall vibrator (8); and an upper storage hopper infrared material level meter (7) is provided at the discharge port of the upper storage hopper (17); A first lower hopper pressure gauge (5) and a second lower hopper pressure gauge (19) are arranged at the top of the lower hopper (20); an exhaust pipe is also arranged at the top of the lower hopper (20); an acetylene online detector (3) and a lower hopper nitrogen exhaust valve (4) are arranged on the exhaust pipe; an air inlet pipe is arranged at the bottom of the lower hopper (20); a lower hopper nitrogen inlet valve (21) is arranged on the air inlet pipe; a lower hopper bin wall vibrator (2) is also arranged at the bottom of the lower hopper (20); and a lower hopper infrared material level meter (1) is arranged at the discharge port of the lower hopper (20).

2. The device for adding calcium carbide to a wet acetylene generator according to claim 1, characterized in that: The air inlet pipe and the air outlet pipe of the upper storage hopper (17) and the lower storage hopper (20) are respectively arranged on both sides of the corresponding storage hopper.

3. The device for adding calcium carbide to a wet acetylene generator according to claim 1, characterized in that: The lower hopper infrared material level meter (1) is mounted on the outer wall of the lower hopper (20), and the length of the lower hopper infrared material level meter (1) inserted into the lower hopper (20) is consistent with the thickness of the outer wall of the lower hopper (20).

4. The device for adding calcium carbide to a wet acetylene generator according to claim 1, characterized in that: The upper hopper infrared material level meter (7) is mounted on the outer wall of the upper hopper (17), and the length of the upper hopper infrared material level meter (7) inserted into the upper hopper (17) is consistent with the thickness of the outer wall of the upper hopper (17).

5. The device for adding calcium carbide to a wet acetylene generator according to claim 1, characterized in that: The control ends of the lower hopper infrared material level meter (1), the lower hopper bin wall vibrator (2), the acetylene online detector (3), the lower hopper nitrogen exhaust valve (4), the lower hopper first pressure gauge (5), the lower valve (6), the upper hopper infrared material level meter (7), the upper hopper bin wall vibrator (8), the upper hopper exhaust online detector (9), the upper hopper nitrogen exhaust valve (10), the upper hopper first pressure gauge (11), the upper valve (12), the calcium carbide hopper oil pressure scale (15), the upper hopper second pressure gauge (16), the upper hopper nitrogen inlet valve (18), the lower hopper second pressure gauge (19), the lower hopper nitrogen inlet valve (21), the belt feeder (13), the feeding box feeder (22), and the acetylene generator (23) are respectively connected to the DCS system through wires.

Images