Nitrogen sealing device of blowing mechanical clarifying tank

Abstract

The utility model relates to the technical field of nitrogen sealing devices for clarifying tanks, and discloses a nitrogen sealing device for a blast cooling mechanical clarifying tank, which comprises a blast cooling mechanical clarifying tank and nitrogen sealing mechanism, a refrigeration tower mechanism and a tail gas bin mechanism, and the blast cooling mechanical clarifying tank and nitrogen sealing mechanism comprises a blast cooling mechanical clarifying tank body. A nitrogen pressure supplementing pipe is fixedly arranged at the upper end of the blast cooling mechanical clarifying tank body, a first electric control valve is fixedly arranged in the middle of the nitrogen pressure supplementing pipe through threads, and gate valves are fixedly arranged at the positions, close to the two sides, of the middle of the nitrogen pressure supplementing pipe through threads. According to the device, the stable pressure of the tank is ensured in a nitrogen sealing and pressure maintaining mode, a large amount of air is prevented from entering the tank, the oxygen concentration in tail gas is controlled in a nitrogen supplementing mode, the whole structural design is reasonable, environment-friendly and sanitary, the tail gas is prevented from overflowing, and the device is connected to a treatment system box through a pipeline; various pollution problems caused by tail gas emission of the mechanical ammonia water clarifying tank are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of nitrogen seal device of clarifying tank, especially relates to a drum cooling mechanized clarifying tank nitrogen seal device. BACKGROUND

[0002] Mechanized clarifying tank refers to a kind of initial cooling equipment of coke oven gas for separating coal tar, ammonia water and tar residue using gravity sedimentation principle, and mechanized ammonia water clarifying tank is the equipment used for purifying tar by gas company or coking plant, mainly separates tar, ammonia water and tar residue according to the difference of material specific gravity, and is divided into three layers in tank: upper layer is ammonia water, middle layer is tar, and lower layer is tar residue, tar residue deposited in tank bottom is sent to leak nozzle to discharge tank outside by scraper conveyor, and tar flows to tar tank through liquid level regulator, and ammonia water after clarification is overflowed to circulating ammonia water tank through upper portion.

[0003] The production particularity of mechanized clarifying tank causes a large amount of flammable and explosive gas to gather at the top of machine tank, and since tail gas is recovered, machine tank is in negative pressure state, a large amount of air can be mixed due to poor sealing of machine tank, explosive conditions are formed, and there are major safety problems.

[0004] Therefore, a drum cooling mechanized clarifying tank nitrogen seal device is provided by the person skilled in the art to solve the problems in the background art. CONTENT OF UTILITY MODEL

[0005] The utility model aims at solving the shortcomings in the prior art, and provides a drum cooling mechanized clarifying tank nitrogen seal device, which ensures stable pressure of tank by nitrogen seal pressure maintaining mode, avoids a large amount of air from entering, controls oxygen concentration in tail gas by nitrogen supplementing mode, has reasonable structure design, is environmentally friendly and sanitary, ensures that tail gas does not overflow, is connected to treatment system box through pipeline, and effectively solves various pollution problems caused by tail gas discharge of mechanized ammonia water clarifying tank.

[0006] To achieve the above object, the utility model provides the following technical scheme: a drum cooling mechanized clarifying tank nitrogen seal device, including drum cooling mechanized clarifying tank and nitrogen seal mechanism, refrigeration tower mechanism and tail gas bin mechanism, the drum cooling mechanized clarifying tank and nitrogen seal mechanism include drum cooling mechanized clarifying tank body, nitrogen gas pressure compensation pipe is fixedly arranged on the upper end of the drum cooling mechanized clarifying tank body, a first electric control valve is fixedly arranged in the middle part of the nitrogen gas pressure compensation pipe through thread, gate valve is fixedly arranged in the middle part of the nitrogen gas pressure compensation pipe through thread on both sides, check valve is fixedly arranged on both sides of the nitrogen gas pressure compensation pipe away from the first electric control valve position through thread, nitrogen tank is fixedly arranged on the other side of the nitrogen gas pressure compensation pipe through thread;

[0007] The PLC system box is fixedly arranged at the upper side of the front end of the drum cooling mechanical clarification tank body, a sound and light alarm is fixedly arranged at the other side of the upper end of the PLC system box, a power distributor is fixedly arranged at the lower end of the PLC system box, a pressure transmitter connecting line is fixedly arranged at the side of the front end of the drum cooling mechanical clarification tank body, a plurality of pressure transmitters are fixedly arranged in the drum cooling mechanical clarification tank body, and the tail gas bin mechanism comprises a tail gas bin body.

[0008] Further, a nitrogen supplementing pipe is fixedly arranged at the other side of the front end of the nitrogen pressure supplementing pipe, and a second electric control valve is fixedly arranged in the middle of the nitrogen supplementing pipe.

[0009] Further, the refrigeration tower mechanism comprises a refrigeration tower body, and a first connecting pipe is fixedly arranged at one side of the refrigeration tower body.

[0010] Further, a second connecting pipe is fixedly arranged at the other side of the upper end of the refrigeration tower body, and a third electric control valve is fixedly arranged in the middle of the second connecting pipe.

[0011] Further, an oxygen concentration detector is fixedly arranged at the side of the front end of the tail gas bin body.

[0012] Further, an exhaust pipe is fixedly arranged at the other side of the upper end of the tail gas bin body.

[0013] Further, the exhaust pipe is connected with a coke oven gas pipeline of a coking plant.

[0014] The drum cooling mechanical clarification tank nitrogen sealing device has the following beneficial effects:

[0015] 1. The drum cooling mechanical clarification tank nitrogen sealing device disclosed by the utility model can ensure the stable pressure of the tank through the nitrogen sealing pressure maintaining mode, avoid the large amount of air from entering, control the oxygen concentration in the tail gas through the nitrogen supplementing mode, has reasonable structure design, is environmentally friendly and sanitary, ensures that the tail gas does not overflow, is connected to a treatment system box through a pipeline, and effectively solves various pollution problems caused by the tail gas discharge of the mechanical ammonia water clarification tank.

[0016] 2. The drum cooling mechanical clarification tank nitrogen sealing device disclosed by the utility model can comprehensively monitor the pressure in different regions of the tank through the plurality of reasonable interval pressure transmitters in the drum cooling mechanical clarification tank and the nitrogen sealing mechanism, can rapidly control the first electric control valve to open and supplement nitrogen and simultaneously sound and light alarm once the pressure deviates from the set lower limit of 1KPa, timely corrects the low pressure condition, can also rapidly alarm when the pressure is too high or the nitrogen supplementing pipeline pressure is abnormal, ensures that the pressure in the tank is always stable, and effectively avoids the production risks caused by the pressure problems. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the utility model.

[0018] Figure 2 is a front view axonometric schematic view of the present application;

[0019] Figure 3 is a rear view axonometric schematic view of the present application;

[0020] Figure 4 is a side view axonometric schematic view of the present application.

[0021] Legend:

[0022] 1, drum cooling mechanized clarifying tank and nitrogen sealing mechanism;2, refrigeration tower mechanism;3, tail gas bin mechanism;101, drum cooling mechanized clarifying tank body;102, nitrogen pressure compensation pipe;103, No. 1 electric control valve;104, gate valve;105, check valve;106, nitrogen tank;107, nitrogen supplement pipe;108, No. 2 electric control valve;109, PLC system box;110, power distribution device;111, audible and visual alarm;112, pressure transmitter connecting line;201, refrigeration tower body;202, No. 1 connecting pipe;203, No. 2 connecting pipe;204, No. 3 electric control valve;301, tail gas bin body;302, exhaust pipe;303, oxygen concentration detector. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] Reference Figures 1-4The utility model provides a kind of embodiment: a drum cold mechanization clarifying tank nitrogen seal device, including drum cold mechanization clarifying tank and nitrogen seal mechanism 1, refrigeration tower mechanism 2 and tail gas warehouse mechanism 3, drum cold mechanization clarifying tank and nitrogen seal mechanism 1 include drum cold mechanization clarifying tank body 101, nitrogen gas pressure compensation pipe 102 is fixedly arranged on drum cold mechanization clarifying tank body 101 upper end, one electric control valve 103 is fixedly arranged in nitrogen gas pressure compensation pipe 102 middle part by thread, gate valve 104 is fixedly arranged by thread in the middle part of nitrogen gas pressure compensation pipe 102 by two sides position, check valve 105 is fixedly arranged by thread in the middle part of nitrogen gas pressure compensation pipe 102 by two sides position away from one electric control valve 103, nitrogen gas tank 106 is fixedly arranged by thread in the other side of nitrogen gas pressure compensation pipe 102, PLC system box 109 is fixedly arranged in the upper side position of drum cold mechanization clarifying tank body 101 front end, sound-light alarm 111 is fixedly arranged in the other side position of PLC system box 109 upper end, distribution apparatus 110 is fixedly arranged in the lower end of PLC system box 109, pressure transmitter connecting line 112 is fixedly arranged in the side position of drum cold mechanization clarifying tank body 101 front end, a plurality of pressure transmitters are fixedly arranged in the inside of drum cold mechanization clarifying tank body 101, nitrogen supplement pipe 107 is fixedly arranged in the other side position of nitrogen gas pressure compensation pipe 102 front end, two electric control valves 108 are fixedly arranged in nitrogen supplement pipe 107 middle part,

[0025] Specifically, the nitrogen pressure compensation pipe 102 is communicated with the top of the clarifying tank, the nitrogen pressure compensation pipe 102 is provided with a gate valve 104, a check valve 105 and a first electric control valve 103, the left and right sides of the first electric control valve 103 are respectively provided with a gate valve 104 and a check valve 105, and the distances from the first electric control valve 103 to the check valve 105 and the gate valve 104 are from far to near. The tank is connected with the PLC system box 109 through a signal line, the PLC system box 109 controls the opening and closing actions of the first electric control valve 103 and whether the alarm device alarms or not, wherein the alarm device is an audible and visual alarm device 111, the gate valve 104, the check valve 105 and the first electric control valve 103 are in a normally open state, at least three pressure transmitters are arranged in the tank, the distance between adjacent two pressure transmitters is not less than 5 meters, the lower limit of the tank pressure is set to 1KPa according to the actual production situation, the program set in the PLC system box 109 is that two of the three measured pressures are less than 1KPa, the pressure reaches the lower limit, nitrogen pressure compensation is needed, the pressure transmitter is connected through a pressure transmitter connection line 112, the power distribution device 110 is beneficial to provide a 24-volt power supply and plays a signal isolation role, when the pressure in the tank is less than 1KPa, the signal of the too small pressure is transmitted to the relay in the PLC system box 109 immediately, the relay control circuit outputs the signal to the field and opens the first electric control valve 103 in time to start nitrogen pressure compensation, at the same time, the audible and visual alarm device 111 is powered on to issue an alarm prompt, at the same time, when the pressure in the tank is too high, the signal of the too large pressure is transmitted to the relay in the PLC system box 109 immediately, the relay controls the audible and visual alarm device 111 to be powered on to issue an alarm prompt, so that the operator can confirm in time and ensure that the real pressure does not exceed the limited value, when the pressure in the nitrogen compensation pipeline is too small, the pressure transmitter will transmit the signal of the too small pressure to the relay in the PLC system box 109 immediately, the relay control circuit outputs the signal to the field and controls the audible and visual alarm device 111 to be powered on to issue an alarm prompt in time, so that the operator can confirm in time and ensure that the real pressure is not less than the limited value, and the nitrogen tank 106 is beneficial to the supplement of nitrogen.

[0026] Referring to Figures 1-3 , the refrigeration tower mechanism 2 comprises a refrigeration tower body 201, one side of the refrigeration tower body 201 is fixedly provided with a first connecting pipe 202, the other side of the refrigeration tower body 201 is fixedly provided with a second connecting pipe 203 at an upper end position, and a third electric control valve 204 is fixedly arranged in the middle of the second connecting pipe 203, the tail gas warehouse mechanism 3 comprises a tail gas warehouse body 301, an oxygen concentration detector 303 is fixedly arranged at a front end side position of the tail gas warehouse body 301, an exhaust pipe 302 is fixedly arranged at another side position of an upper end of the tail gas warehouse body 301, and the exhaust pipe 302 is connected with a coke oven gas pipeline of a coking plant;

[0027] Specifically, the refrigeration tower body 201 is convenient for gas refrigeration, the second connecting pipe 203 is convenient for gas to enter the refrigeration tower body 201 and to be cooled and then discharged into the tail gas warehouse body 301 through the second connecting pipe 203, the temperature of the gas negative pressure pipeline is matched by the refrigeration tower body 201, and then the naphthalene is crystallized and left in the tank, and after a certain amount, steam heating is carried out to discharge it into the slag removal groove. In the gas transportation process, the third electric control valve 204 controls the flow rate of the gas transportation, and when the oxygen concentration detector 303 detects that the oxygen content in the tail gas warehouse body 301 reaches the set value, the third electric control valve 204 is controlled to be opened, the tail gas warehouse body 301 exhaust pipe 302 is closed, nitrogen is supplemented, the oxygen content in the tail gas warehouse is reduced to control oxygen, and when the oxygen concentration reaches the set value, the nitrogen pipeline is closed, the tail gas warehouse exhaust pipe 302 is opened, and the tail gas is output for subsequent processing.

[0028] Working principle: In the drum cooling mechanical clarifier and nitrogen sealing mechanism 1, the nitrogen pressure supplement pipe 102 serves as the key channel for nitrogen input, and is communicated with the top of the clarifier to ensure that nitrogen can uniformly enter the tank. When the pressure in the tank is within the normal range, the gate valve 104, the check valve 105 and the first electric control valve 103 remain open. The nitrogen tank 106 is ready at any time to prepare for possible pressure fluctuations. Multiple pressure transmitters are distributed inside the tank, and the distance between them is not less than 5 meters, so as to more comprehensively and accurately monitor the pressure in different areas of the tank. Once the pressure detected by two or more pressure transmitters is less than the set lower limit of 1 KPa, the pressure signal is transmitted to the relay in the PLC system box 109 through the pressure transmitter connection line 112. The relay control loop responds quickly. On the one hand, it outputs a signal to open the first electric control valve 103, so that nitrogen from the nitrogen tank 106 flows into the tank through the nitrogen pressure supplement pipe 102 to perform pressure compensation. On the other hand, the audible and visual alarm 111 is powered on to alert the operator to pay attention to the pressure condition. Similarly, when the pressure in the tank is too high, the pressure transmitters will detect an abnormally high pressure signal, which will also be quickly transmitted to the PLC system box 109 to trigger the audible and visual alarm 111 to alarm. The operator can take timely pressure reduction measures to prevent overpressure risks. If the nitrogen charging and pressure compensation pipeline itself has too small pressure, the pressure transmitter will also sensitively capture this signal and transmit it to the relay to control the audible and visual alarm 111 to alarm, prompting the operator to troubleshoot the nitrogen supply problem and ensure normal pressure compensation function.

[0029] Secondly, the tail gas in the drum cooling mechanical clarifier body 101 enters the tail gas warehouse body 301 through the refrigeration tower body 201. When the oxygen concentration detector 303 detects that the oxygen content in the tail gas warehouse body 301 reaches the set value, the third electric control valve 204 is controlled to be opened, the tail gas warehouse body 301 exhaust pipe 302 is closed, nitrogen is supplemented, the oxygen content in the tail gas warehouse is reduced to control oxygen, and when the oxygen concentration reaches the set value, the nitrogen pipeline is closed, the tail gas warehouse exhaust pipe 302 is opened, and the tail gas is output for subsequent processing.

[0030] It should be pointed out finally that: the above only for the preferred embodiments of the present application have, and not for limiting the present application, although the present application is described in detail with reference to the foregoing embodiments, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. A drum cooling mechanized clarifier nitrogen sealing device, comprising a drum cooling mechanized clarifier and a nitrogen sealing mechanism (1), a refrigeration tower mechanism (2) and a tail gas bin mechanism (3), characterized in that: The drum cooling mechanized clarifying tank and nitrogen sealing mechanism (1) comprises a drum cooling mechanized clarifying tank body (101), a nitrogen pressure supplementing pipe (102) is fixedly arranged at the upper end of the drum cooling mechanized clarifying tank body (101), a first electric control valve (103) is fixedly arranged in the middle of the nitrogen pressure supplementing pipe (102) through screw threads, a gate valve (104) is fixedly arranged at the positions close to both sides of the middle of the nitrogen pressure supplementing pipe (102) through screw threads, a check valve (105) is fixedly arranged at the positions away from the first electric control valve (103) of the both sides of the nitrogen pressure supplementing pipe (102) through screw threads, and a nitrogen tank (106) is fixedly arranged at the other side of the nitrogen pressure supplementing pipe (102) through screw threads. A PLC system box (109) is fixedly arranged at the upper side of the front end of the drum cooling mechanized clarifying tank body (101), a sound-light alarm (111) is fixedly arranged at the other side of the upper end of the PLC system box (109), a power distributor (110) is fixedly arranged at the lower end of the PLC system box (109), a pressure transmitter connecting line (112) is fixedly arranged at the position close to one side of the front end of the drum cooling mechanized clarifying tank body (101), a plurality of pressure transmitters are fixedly arranged in the drum cooling mechanized clarifying tank body (101), and a tail gas warehouse mechanism (3) comprises a tail gas warehouse body (301).

2. A nitrogen seal apparatus for a mechanically clarified drum according to claim 1, wherein: A nitrogen supplementing pipe (107) is fixedly arranged at the other side of the front end of the nitrogen pressure supplementing pipe (102), and a second electric control valve (108) is fixedly arranged in the middle of the nitrogen supplementing pipe (107).

3. A nitrogen seal for a mechanically clarified drum cooler as defined in claim 1, wherein: The refrigeration tower mechanism (2) comprises a refrigeration tower body (201), and a first connecting pipe (202) is fixedly arranged at one side of the refrigeration tower body (201).

4. A nitrogen seal for a mechanically clarified drum cooler according to claim 3, wherein: A second connecting pipe (203) is fixedly arranged at the upper end of the other side of the refrigeration tower body (201), and a third electric control valve (204) is fixedly arranged in the middle of the second connecting pipe (203).

5. A nitrogen seal for a mechanically clarified drum cooler as defined in claim 1, wherein: An oxygen concentration detector (303) is fixedly arranged at the position close to one side of the front end of the tail gas warehouse body (301).

6. A nitrogen seal apparatus for a mechanically clarified drum cooler according to claim 1, wherein: An exhaust pipe (302) is fixedly arranged at the other side of the upper end of the tail gas warehouse body (301).

7. A nitrogen seal for a mechanically clarified drum according to claim 6, wherein: The exhaust pipe (302) is connected with a coke oven gas pipeline of a coking plant.

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