CN114719181B - Ammonia storage tank differential pressure ammonia unloading method and ammonia unloading device - Google Patents

Ammonia storage tank differential pressure ammonia unloading method and ammonia unloading device Download PDF

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Publication number
CN114719181B
CN114719181B CN202210330568.4A CN202210330568A CN114719181B CN 114719181 B CN114719181 B CN 114719181B CN 202210330568 A CN202210330568 A CN 202210330568A CN 114719181 B CN114719181 B CN 114719181B
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China
Prior art keywords
ammonia
storage tank
air
door
tank
Prior art date
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Application number
CN202210330568.4A
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Chinese (zh)
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CN114719181A (en
Inventor
王佐盈
伊福龙
曹永齐
郭建东
殷威
王鑫
毕赢
王心怡
高扬
张纯煜
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Dandong Power Plant of Huaneng International Power Co Ltd
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Dandong Power Plant of Huaneng International Power Co Ltd
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Priority to CN202210330568.4A priority Critical patent/CN114719181B/en
Publication of CN114719181A publication Critical patent/CN114719181A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention provides an ammonia storage tank differential pressure ammonia unloading method and an ammonia unloading device thereof, the device comprises a tank body, and the air ammonia door, the liquid ammonia door, the pressure regulating door and the liquid ammonia evaporator are arranged at the top end of the tank body, and the tank body is sleeved with a heat preservation mechanism. The invention can replace an ammonia unloading compressor, utilizes the heating of the liquid ammonia evaporator to gasify the liquid ammonia, controls the pressure difference between the ammonia storage tanks to finish the ammonia unloading operation, and mutually inversing the tanks between the ammonia storage tanks. Especially, when the temperature of the external environment is lower in winter and the ammonia unloading compressor is used, the failure rate is too high, and the ammonia unloading compressor can not work, so that the effect of the ammonia unloading compressor is more remarkable.

Description

Differential pressure ammonia discharging method and device for ammonia storage tank
Technical Field
The invention mainly relates to the technical field of ammonia unloading of an ammonia storage tank, in particular to an ammonia storage tank differential pressure ammonia unloading method and an ammonia unloading device thereof.
Background
Ammonia is a compound of nitrogen and hydrogen, the molecular formula is NH 3, colorless gas is generated at normal temperature, strong pungent smell exists, liquid ammonia has great danger, and how to safely and reliably unload ammonia in a power plant is an important link of stable operation of the system.
The coal-fired power plant uses ammonia to remove NOX, outsourced liquid ammonia is discharged to an ammonia storage tank by an ammonia discharge compressor, the failure rate of the ammonia discharge compressor is extremely high at present, particularly in winter, great difficulty is caused to the ammonia receiving and discharging, and the safe operation of a unit denitration system is seriously influenced.
Disclosure of Invention
The invention mainly provides an ammonia storage tank differential pressure ammonia unloading method and an ammonia unloading device thereof, which are used for solving the technical problems in the background technology.
The technical scheme adopted for solving the technical problems is as follows:
An ammonia storage tank differential pressure ammonia unloading method comprises the following steps:
Step one, an adjusting door of a first liquid ammonia evaporator is opened, auxiliary steam is adjusted to the first liquid ammonia evaporator, the pressure in a first ammonia storage tank is increased through the first liquid ammonia evaporator, the pressure in the first ammonia storage tank is kept higher than the pressure in a second ammonia storage tank, and the pressure difference is 0.2MPa;
step two, closing an entry door of the ammonia unloading compressor;
Step three, a bypass door of an ammonia unloading compressor, an ammonia gas door of a first ammonia storage tank, a gas phase isolation door of a tank car, a liquid ammonia door of a second ammonia storage tank and a liquid phase isolation door of the tank car are sequentially opened, so that ammonia liquid in the tank car is unloaded into the second ammonia storage tank;
and step four, after the ammonia unloading work is finished, sequentially closing an adjusting door of the first liquid ammonia evaporator, an ammonia door of the first ammonia storage tank, a liquid ammonia door of the second ammonia storage tank, a gas phase isolation door of the tank wagon, a liquid phase isolation door of the tank wagon and a bypass door of the ammonia unloading compressor.
According to the technical scheme of the ammonia storage tank differential pressure ammonia unloading method, the ammonia unloading device of the ammonia storage tank differential pressure ammonia unloading method comprises a tank car, a first ammonia storage tank and a second ammonia storage tank, wherein the first ammonia storage tank and the second ammonia storage tank are connected with each other through pipelines, the first ammonia storage tank is connected with a first liquid ammonia evaporator through pipelines, the second ammonia storage tank is connected with a second liquid ammonia evaporator through pipelines, the first ammonia storage tank and the second ammonia storage tank are identical in structure, the first ammonia storage tank comprises a tank body, an ammonia gate, a liquid ammonia gate and a pressure regulating gate, the air gate, the liquid ammonia gate and the pressure regulating gate are arranged at the top end of the tank body, a heat preservation layer is arranged outside the tank body, and a heat preservation mechanism is sleeved outside the heat preservation layer.
Further, the heat preservation mechanism comprises a heat preservation sleeve sleeved on the outer surface of the heat preservation sleeve, an air inlet component arranged at the bottom of one end of the heat preservation sleeve, and an air outlet component arranged in the heat preservation sleeve and connected with the input end of the air inlet component.
Further, the air inlet assembly comprises a first air inlet pipe connected with the air outlet end of the first liquid ammonia evaporator, a first three-way pipe connected with the air outlet end of the first air inlet pipe, and two second air inlet pipes connected with the air outlet end of the first three-way pipe, wherein one end of each second air inlet pipe, far away from the first three-way pipe, extends to the inside of the heat preservation sleeve.
Further, the air outlet assembly comprises an air delivery pipe connected with one end of the second air inlet pipe extending to the inside of the heat preservation sleeve, a first filter plate sequentially installed on the outer surfaces of two sides of the heat preservation layer from top to bottom, and a second filter plate arranged between two adjacent first filter plates and installed on the inner wall surface of the heat preservation sleeve.
Further, the top end of the gas pipe is provided with a plurality of gas outlet heads in sequence, the plurality of gas outlet heads are obliquely arranged, the hot air sprayed out by the air outlet head rises along the cambered surface formed by the tank body and the heat insulation sleeve, so that the hot air can rise and can be effectively contacted with the tank body.
Further, the heat preservation mechanism further comprises an air return assembly, the air return assembly comprises air return covers which are arranged at the top end of the heat preservation layer and are symmetrically arranged, a first air return pipe which is connected with the top end of the air return cover, and a second three-way pipe which is connected with one ends of the two first air return pipes far away from the air return cover, and the air outlet end of the second three-way pipe is connected with the second air return pipe.
Furthermore, the longitudinal section of the air return cover is trapezoid, and in the invention, the air return cover is of a big-end and small-end structure, so that the air return cover can receive more hot air and concentrate the hot air, thereby facilitating the air transmission of the first air return pipe.
Further, the air return assembly further comprises a fan connected with the air outlet end of the second air return pipe, the air outlet end of the fan is connected with a third air return pipe, one end, away from the fan, of the third air return pipe is connected with the first air inlet pipe, and in the invention, hot air flows back to the bottom of the heat preservation sleeve again through the first air inlet pipe, so that the hot air is prevented from expanding and rising, and accumulated on the top end of the heat preservation sleeve, and the heat preservation effect of the heat preservation sleeve is not uniform.
Further, a one-way valve is connected to the shell of the third muffler.
Compared with the prior art, the invention has the beneficial effects that:
Firstly, the invention can overcome the defects of insufficient ammonia discharging power of the ammonia storage tanks caused by lower external environment temperature and over high failure rate of the ammonia discharging compressor in winter, and the ammonia storage tanks can still mutually discharge ammonia when the ammonia discharging compressor fails, and specifically comprises the following steps: the fault ammonia unloading compressor bypasses to form pressure difference between different ammonia storage tanks, and the pressure difference between the high-pressure ammonia storage tank and the ammonia storage tank for ammonia unloading is utilized to provide power for ammonia unloading so that the ammonia storage tank can unload ammonia by means of the pressure difference.
Secondly, the invention provides high-efficiency and uniform heat preservation for the tank body of the ammonia storage tank by utilizing the hot waste gas discharged by the liquid ammonia evaporator so as to facilitate the subsequent temperature rise of the ammonia storage tank, and specifically comprises the following steps: the hot air is stored through the heat preservation sleeve, and the heat preservation sleeve is sleeved outside the tank body, so that the tank body is insulated, the temperature in the tank body is prevented from being too low, long-time heating is needed, hot air in the heat preservation sleeve is blocked through the first filter plate and the second filter plate, the hot air advances along the S shape, the time of the hot air stagnation in the heat preservation sleeve is improved, and the hot air is fully contacted with the tank body.
The invention will be explained in detail below with reference to the drawings and specific embodiments.
Drawings
FIG. 1 is a schematic illustration of the present invention;
FIG. 2 is a schematic view of the first ammonia tank of the present invention;
FIG. 3 is an isometric view of a first ammonia tank of the present invention;
FIG. 4 is a top view of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
FIG. 6 is an enlarged view of the structure of area A in FIG. 5;
FIG. 7 is a schematic diagram of embodiment 1 of the present invention;
fig. 8 is a schematic diagram of embodiment 2 of the present invention.
In the figure: 10. a first liquid ammonia evaporator; 20. a first ammonia storage tank; 21. a tank body; 22. an ammonia gate; 23. a liquid ammonia gate; 24. an adjusting door; 25. a heat preservation mechanism; 251. a thermal insulation sleeve; 252. an air intake assembly; 2521. a first air inlet pipe; 2522. a first tee; 2523. a second air inlet pipe; 253. an air outlet assembly; 2531. a gas pipe; 2532. a first filter plate; 2533. a second filter plate; 254. an air return assembly; 2541. a return air cover; 2542. a first muffler; 2543. a second tee; 2544. a second muffler; 2545. a blower; 2546. a third muffler; 2547. a one-way valve; 26. an ammonia discharging door; 27. a heat preservation layer; 30. a second ammonia storage tank; 40. a ammonia unloading compressor; 50. a tank car; 60. and a second liquid ammonia evaporator.
Detailed Description
In order that the invention may be more fully understood, a more particular description of the invention will be rendered by reference to the appended drawings, in which several embodiments of the invention are illustrated, but which may be embodied in different forms and are not limited to the embodiments described herein, which are, on the contrary, provided to provide a more thorough and complete disclosure of the invention.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to the other element, it may be directly connected to the other element or intervening elements may also be present, the terms "vertical", "horizontal", "left", "right" and the like are used herein for the purpose of illustration only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly connected to one of ordinary skill in the art to which this invention belongs, and the knowledge of terms used in the description of this invention herein for the purpose of describing particular embodiments is not intended to limit the invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1 referring to fig. 1-7, an ammonia tank differential pressure ammonia stripping method comprises the steps of:
Step one, opening an adjusting door of a first liquid ammonia evaporator 10, adjusting auxiliary steam to the first liquid ammonia evaporator 10, and increasing the internal pressure of a first ammonia storage tank 20 through the first liquid ammonia evaporator 10, wherein the internal pressure of the first ammonia storage tank 20 is kept higher than the internal pressure of a second ammonia storage tank 30, and the pressure difference is 0.2MPa;
Step two, closing an entry door of the ammonia unloading compressor 40;
step three, a bypass door of the ammonia discharging compressor 40, a gas ammonia door 22 of the first ammonia storage tank 20, a gas phase isolation door of the tank car 50, a liquid ammonia door 23 of the second ammonia storage tank 30 and a liquid phase isolation door of the tank car 50 are sequentially opened to discharge ammonia liquor in the tank car 50 into the second ammonia storage tank 30;
Step four, after the ammonia unloading work is finished, closing an adjusting door of the first liquid ammonia evaporator 10, an ammonia gas door 22 of the first ammonia storage tank 20, a liquid ammonia door 23 of the second ammonia storage tank 30, a gas phase isolation door of the tank truck 50, a liquid phase isolation door of the tank truck 50 and a bypass door of the ammonia unloading compressor 40 in sequence;
further, first ammonia storage tank 20 and second ammonia storage tank 30 may be configured as a set of ammonia removal components, and multiple sets of ammonia removal components may be present in the ammonia removal system.
Specifically, please refer to fig. 2 and 3, the device comprises a tank car 50, and a first ammonia storage tank 20 and a second ammonia storage tank 30 connected with the tank car 50 through pipelines, wherein the first ammonia storage tank 20 is connected with a first liquid ammonia evaporator 10 through a pipeline, the second ammonia storage tank 30 is connected with a second liquid ammonia evaporator 60 through a pipeline, the first ammonia storage tank 20 and the second ammonia storage tank 30 have the same structure, the first ammonia storage tank 20 comprises a tank body 21, an air-ammonia door 22, a liquid ammonia door 23 and a pressure regulating door 24 which are arranged at the top end of the tank body 21, a heat preservation layer 27 is arranged outside the tank body 21, and a heat preservation mechanism 25 is sleeved outside the heat preservation layer 27;
The heat preservation mechanism 25 comprises a heat preservation sleeve 251 sleeved on the outer surface of the heat preservation layer 27, an air inlet assembly 252 arranged at the bottom of one end of the heat preservation sleeve 251, and an air outlet assembly 253 arranged inside the heat preservation sleeve 251 and connected with the input end of the air inlet assembly 252;
In this embodiment, the first ammonia storage tank 20 is fed with air and discharged with air through an air-ammonia door 22 on the tank body 21, the first ammonia storage tank 20 is fed with liquid ammonia and discharged with liquid ammonia through a liquid ammonia door 23 on the tank body 21, and the first ammonia storage tank 20 is connected with the first liquid ammonia evaporator 10 through a pressure regulating door 24 on the tank body 21;
in the same way, the second ammonia storage tank 30 is connected with the second liquid ammonia evaporator 60 through the pressure regulating door 24 by feeding and discharging air through the air-ammonia door 22 on the second ammonia storage tank and feeding and discharging liquid through the liquid ammonia door 23;
Further, the heat insulation sleeve 251 stores hot air, and the heat insulation sleeve 251 is sleeved outside the tank body 21, so that the tank body 21 is insulated, and the tank body 21 is prevented from being excessively low in temperature and needs long-time heating.
Specifically, referring to fig. 2 and 5, the air intake assembly 252 includes a first air intake pipe 2521 connected to the air outlet end of the first liquid ammonia evaporator 10, a first tee 2522 connected to the air outlet end of the first air intake pipe 2521, and two second air intake pipes 2523 connected to the air outlet end of the first tee 2522, wherein one end of the second air intake pipe 2523 away from the first tee 2522 extends into the heat insulation sleeve 251;
the air outlet assembly 253 includes an air pipe 2531 connected to one end of the second air inlet pipe 2523 extending into the heat insulation sleeve 251, a first filter plate 2532 sequentially installed on two outer surfaces of the heat insulation layer 27 from top to bottom, and a second filter plate 2533 installed between two adjacent first filter plates 2532 and on the inner wall surface of the heat insulation sleeve 251;
A plurality of air outlet heads 2534 are sequentially arranged at the top end of the air delivery pipe 2531, and the air outlet heads 2534 are obliquely arranged;
In this embodiment, the steam heating pipe is inserted into the tank 21 to assist the ammonia liquid in the tank 21 to heat by the steam heating pipe, the steam heating pipe is split by the tee pipe, so that a part of split steam enters the first air inlet pipe 2521, the heat insulation layer 27 is made of heat insulation cotton, the heat insulation cotton is used for insulating the tank 21, high-temperature waste gas in the first air inlet pipe 2521 is separated by the first tee pipe 2522 and then enters the two second air inlet pipes 2523 respectively, so that hot gas is supplied from two sides of the bottom end of the heat insulation sleeve 251 to provide uniformity of hot gas inside the heat insulation sleeve 251, and a heating copper pipe is arranged inside the heat insulation sleeve 251 to assist in heating the hot gas therein by the heating copper pipe;
further, the hot air in the second air inlet pipe 2523 enters the air delivery pipe 2531 and is discharged through the air delivery pipe 2531, the discharged hot air is blocked by the first filter plate 2532 and the second filter plate 2533 which are arranged in a staggered manner, so that the hot air is fully contacted with the first filter plate 2532 and the second filter plate 2533 to be fully filtered, and the hot air advances along an S shape by being blocked by the first filter plate 2532 and the second filter plate 2533, so that the time for retaining the hot air in the heat insulation sleeve 251 is prolonged, and the hot air is fully contacted with the tank body 21;
further, the air pipe 2531 is configured to allow the air outlet head 2534 to be inclined, so that the hot air sprayed from the air outlet head 2534 is lifted along the arc surface formed by the tank 21 and the heat insulation sleeve 251, thereby facilitating the lifting of the hot air and the effective contact with the tank 21.
Specifically, referring to fig. 3, 5 and 6, the heat preservation mechanism 25 further includes an air return assembly 254, the air return assembly 254 includes an air return cover 2541 installed at the top end of the heat preservation layer 27 and symmetrically disposed, a first air return pipe 2542 connected to the top end of the air return cover 2541, and a second three-way pipe 2543 connected to one end of the two first air return pipes 2542 away from the air return cover 2541, and an air outlet end of the second three-way pipe 2543 is connected to a second air return pipe 2544;
The air return assembly 254 further comprises a fan 2545 connected to the air outlet end of the second air return pipe 2544, the air outlet end of the fan 2545 is connected to a third air return pipe 2546, and one end of the third air return pipe 2546 away from the fan 2545 is connected to the first air inlet pipe 2521;
The longitudinal section of the return air cover 2541 is trapezoid;
a one-way valve 2547 is connected to the shell of the third air return pipe 2546;
In the present embodiment, the hot gas that has been expanded and raised from the inside of the tank 21 is received by the return air cover 2541, and the hot gas that has passed through the return air cover 2541 is discharged by the first return air pipe 2542;
Further, since the air return cover 2541 has a big-and-small-head structure, the air return cover 2541 can receive more hot air and concentrate the hot air so as to facilitate the air delivery of the first air return pipe 2542;
further, the hot air in the second air return pipe 2544 is guided to be discharged through the fan 2545, and the hot air enters the third air return pipe 2546 and flows back to the first air inlet pipe 2521 through the third air return pipe 2546, so that the hot air is re-flowed back to the bottom of the heat insulation sleeve 251 through the first air inlet pipe 2521, the hot air is prevented from expanding and rising, and accumulated at the top end of the heat insulation sleeve 251, and the heat insulation effect of the heat insulation sleeve 251 is not uniform;
Further, the third air return pipe 2546 limits the flow direction of the hot air therein through the check valve 2547, so as to prevent the hot air in the first air inlet pipe 2521 from flowing back to the third air return pipe 2546, and affect the air outlet of the third air return pipe 2546.
Example 2 referring to fig. 8, the differential pressure ammonia unloading method for an ammonia tank comprises the following steps:
Step one, opening an adjusting door of a first liquid ammonia evaporator 10, adjusting auxiliary steam to the first liquid ammonia evaporator 10, and increasing the internal pressure of a first ammonia storage tank 20 through the first liquid ammonia evaporator 10, wherein the internal pressure of the first ammonia storage tank 20 is kept higher than the internal pressure of a second ammonia storage tank 30, and the pressure difference is 0.2MPa;
Closing an inlet door of the ammonia unloading compressor 40 and a bypass door of the ammonia unloading compressor 40;
Step three, sequentially opening the liquid ammonia gate 23 of the first ammonia tank 20, the ammonia discharging gate 26 of the first ammonia tank 20, and the liquid ammonia gate 23 of the second ammonia tank 30 to discharge the ammonia liquor inside the first ammonia tank 20 to the inside of the second ammonia tank 30;
Step four, after the ammonia unloading work is finished, sequentially closing the liquid ammonia gate 23 of the second liquid ammonia evaporator 60, the ammonia discharging gate 26 of the first ammonia storage tank 20 and the liquid ammonia gate 23 of the first ammonia storage tank 20;
In this embodiment, two pipes are disposed between the first ammonia tank 20 and the second ammonia tank 30, and a pump body and a liquid ammonia gate 23 are disposed on each pipe to assist in pouring the liquid ammonia between the first ammonia tank 20 and the second ammonia tank 30.
The specific operation mode of the invention is as follows:
Opening an adjusting door of the first liquid ammonia evaporator 10, adjusting auxiliary steam to the first liquid ammonia evaporator 10, increasing the pressure in the first ammonia storage tank 20 through the first liquid ammonia evaporator 10, keeping the pressure in the first ammonia storage tank 20 higher than the pressure in the second ammonia storage tank 30, keeping the pressure difference at 0.2MPa, and closing an inlet door of the ammonia unloading compressor 40;
The bypass gate of the ammonia discharging compressor 40, the gas ammonia gate 22 of the first ammonia tank 20, the gas phase isolation gate of the tank car 50, the liquid ammonia gate 23 of the second ammonia tank 30 and the liquid phase isolation gate of the tank car 50 are sequentially opened to perform the ammonia discharging operation of the second ammonia tank 30;
After the ammonia unloading work is finished, the regulating gate of the first liquid ammonia evaporator 10, the gas ammonia gate 22 of the first ammonia storage tank 20, the liquid ammonia gate 23 of the second ammonia storage tank 30, the gas phase isolation gate of the tank truck 50, the liquid phase isolation gate of the tank truck 50 and the bypass gate of the ammonia unloading compressor 40 are sequentially closed;
Opening an adjusting door of the second liquid ammonia evaporator 60, adjusting auxiliary steam to the second liquid ammonia evaporator 60, increasing the pressure in the second ammonia storage tank 30 through the second liquid ammonia evaporator 60, keeping the pressure in the second ammonia storage tank 30 higher than the pressure in the first ammonia storage tank 20, and closing an inlet door of the ammonia unloading compressor 40, wherein the pressure difference is 0.2 MPa;
The bypass gate of the ammonia discharging compressor 40, the gas ammonia gate 22 of the second ammonia tank 30, the gas phase isolation gate of the tank car 50, the liquid ammonia gate 23 of the first ammonia tank 20 and the liquid phase isolation gate of the tank car 50 are sequentially opened to perform the ammonia discharging operation of the first ammonia tank 20;
After the ammonia discharging operation is completed, the regulating gate of the second liquid ammonia evaporator 60, the gas ammonia gate 22 of the second ammonia storage tank 30, the liquid ammonia gate 23 of the first ammonia storage tank 20, the gas phase isolation gate of the tank car 50, the liquid phase isolation gate of the tank car 50 and the bypass gate of the ammonia discharging compressor 40 are sequentially closed.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the embodiments described above, but is intended to be within the scope of the invention, as long as such insubstantial modifications are made by the method concepts and technical solutions of the invention, or the concepts and technical solutions of the invention are applied directly to other occasions without any modifications.

Claims (5)

1.氨储罐差压卸氨法的卸氨装置，其特征在于，所述氨储罐差压卸氨法包括以下步骤：1. An ammonia unloading device for an ammonia storage tank differential pressure unloading method, characterized in that the ammonia unloading method for an ammonia storage tank differential pressure unloading method comprises the following steps: 步骤一，打开第一液氨蒸发器（10）的调节门，调整辅汽至第一液氨蒸发器（10），通过第一液氨蒸发器（10）提高第一氨储罐（20）罐内压力，保持第一氨储罐（20）罐内压力高于第二氨储罐（30）罐内压力，且压力差为0.2MPa；Step 1, opening the regulating valve of the first liquid ammonia evaporator (10), adjusting the auxiliary steam to the first liquid ammonia evaporator (10), increasing the pressure in the first ammonia storage tank (20) through the first liquid ammonia evaporator (10), maintaining the pressure in the first ammonia storage tank (20) higher than the pressure in the second ammonia storage tank (30), and the pressure difference is 0.2 MPa; 步骤二，关闭卸氨压缩机（40）出入口门；Step 2, closing the inlet and outlet door of the ammonia unloading compressor (40); 步骤三，依次开启卸氨压缩机（40）的旁路门、第一氨储罐（20）的气氨门（22）、槽车（50）的气相隔离门、第二氨储罐（30）的液氨门（23）以及槽车（50）的液相隔离门，以将槽车（50）内部的氨液卸至第二氨储罐（30）的内部；Step 3, opening the bypass door of the ammonia unloading compressor (40), the gas ammonia door (22) of the first ammonia storage tank (20), the gas phase isolation door of the tank truck (50), the liquid ammonia door (23) of the second ammonia storage tank (30), and the liquid phase isolation door of the tank truck (50) in sequence, so as to unload the ammonia liquid in the tank truck (50) into the second ammonia storage tank (30); 步骤四，卸氨工作结束后，依次关闭第一液氨蒸发器（10）的调节门、第一氨储罐（20）的气氨门（22）、第二氨储罐（30）的液氨门（23）、槽车（50）的气相隔离门、槽车（50）的液相隔离门以及卸氨压缩机（40）的旁路门；Step 4: After the ammonia unloading work is completed, the regulating door of the first liquid ammonia evaporator (10), the gas ammonia door (22) of the first ammonia storage tank (20), the liquid ammonia door (23) of the second ammonia storage tank (30), the gas phase isolation door of the tank truck (50), the liquid phase isolation door of the tank truck (50), and the bypass door of the ammonia unloading compressor (40) are closed in sequence; 该卸氨装置包括槽车（50），以及通过管道与所述槽车（50）相连接的第一氨储罐（20）和第二氨储罐（30），所述第一氨储罐（20）通过管道连接有第一液氨蒸发器（10），所述第二氨储罐（30）通过管道连接有第二液氨蒸发器（60），所述第一氨储罐（20）和第二氨储罐（30）的结构相同，所述第一氨储罐（20）包括罐体（21），以及安装于所述罐体（21）顶端的气氨门（22）、液氨门（23）和调压门（24），所述罐体（21）的外部设有保温层（27），所述保温层（27）的外部套设有保温机构（25）；The ammonia unloading device comprises a tank truck (50), and a first ammonia storage tank (20) and a second ammonia storage tank (30) connected to the tank truck (50) via a pipeline, the first ammonia storage tank (20) being connected to a first liquid ammonia evaporator (10) via a pipeline, and the second ammonia storage tank (30) being connected to a second liquid ammonia evaporator (60) via a pipeline, the first ammonia storage tank (20) and the second ammonia storage tank (30) having the same structure, the first ammonia storage tank (20) comprising a tank body (21), and a gas ammonia door (22), a liquid ammonia door (23) and a pressure regulating door (24) mounted on the top of the tank body (21), the tank body (21) being provided with a heat-insulating layer (27) on the outside, and a heat-insulating mechanism (25) being provided on the outside of the heat-insulating layer (27); 所述保温机构（25）包括套设于所述保温层（27）外表面的保温套（251），设于所述保温套（251）一端底部的进气组件（252），以及设于所述保温套（251）的内部、且与所述进气组件（252）的输入端相连接的出气组件（253），所述进气组件（252）包括与所述第一液氨蒸发器（10）的出气端相连接的第一进气管（2521），与所述第一进气管（2521）的出气端相连接的第一三通管（2522），以及与所述第一三通管（2522）的出气端相连接的两个第二进气管（2523），所述第二进气管（2523）远离所述第一三通管（2522）的一端延伸至所述保温套（251）的内部，所述出气组件（253）包括与所述第二进气管（2523）延伸至所述保温套（251）内部的一端相连接的输气管（2531），由上至下依次安装于所述保温层（27）两侧外表面的第一过滤板（2532），以及设于相邻两个所述第一过滤板（2532）之间、且安装于所述保温套（251）内壁表面的第二过滤板（2533），所述输气管（2531）的顶端依次安装有多个出气头（2534），多个所述出气头（2534）倾斜设置。The heat-insulating mechanism (25) comprises a heat-insulating sleeve (251) sleeved on the outer surface of the heat-insulating layer (27), an air inlet assembly (252) arranged at the bottom of one end of the heat-insulating sleeve (251), and an air outlet assembly (253) arranged inside the heat-insulating sleeve (251) and connected to the input end of the air inlet assembly (252), the air inlet assembly (252) comprising a first air inlet pipe (2521) connected to the air outlet end of the first liquid ammonia evaporator (10), a first three-way pipe (2522) connected to the air outlet end of the first air inlet pipe (2521), and two second air inlet pipes (2523) connected to the air outlet ends of the first three-way pipe (2522), the second air inlet pipes (2521) and the air outlet ends of the first three-way pipes (2522). (2523) extends from one end of the first three-way pipe (2522) to the interior of the insulation sleeve (251), the air outlet assembly (253) includes an air supply pipe (2531) connected to one end of the second air inlet pipe (2523) extending to the interior of the insulation sleeve (251), first filter plates (2532) installed on the outer surfaces of both sides of the insulation layer (27) from top to bottom, and a second filter plate (2533) arranged between two adjacent first filter plates (2532) and installed on the inner wall surface of the insulation sleeve (251), and a plurality of air outlet heads (2534) are installed on the top of the air supply pipe (2531) in sequence, and the plurality of air outlet heads (2534) are arranged obliquely. 2.根据权利要求1所述的卸氨装置，其特征在于，所述保温机构（25）还包括回气组件（254），所述回气组件（254）包括安装于所述保温层（27）顶端、且对称设置的回气罩（2541），与所述回气罩（2541）的顶端相连接的第一回气管（2542），以及与两个所述第一回气管（2542）远离回气罩（2541）的一端相连接的第二三通管（2543），所述第二三通管（2543）的出气端连接有第二回气管（2544）。2. The ammonia unloading device according to claim 1 is characterized in that the insulation mechanism (25) further includes an air return assembly (254), the air return assembly (254) includes an air return hood (2541) installed on the top of the insulation layer (27) and symmetrically arranged, a first air return pipe (2542) connected to the top of the air return hood (2541), and a second three-way pipe (2543) connected to one end of the two first air return pipes (2542) away from the air return hood (2541), and the air outlet end of the second three-way pipe (2543) is connected to the second air return pipe (2544). 3.根据权利要求2所述的卸氨装置，其特征在于，所述回气罩（2541）的纵切面呈梯形。3. The ammonia unloading device according to claim 2 is characterized in that the longitudinal section of the return air hood (2541) is trapezoidal. 4.根据权利要求3所述的卸氨装置，其特征在于，所述回气组件（254）还包括与所述第二回气管（2544）的出气端相连接的风机（2545），所述风机（2545）的出气端连接有第三回气管（2546），所述第三回气管（2546）远离所述风机（2545）的一端与所述第一进气管（2521）相连接。4. The ammonia unloading device according to claim 3 is characterized in that the air return component (254) further comprises a fan (2545) connected to the air outlet end of the second air return pipe (2544), the air outlet end of the fan (2545) is connected to a third air return pipe (2546), and one end of the third air return pipe (2546) away from the fan (2545) is connected to the first air inlet pipe (2521). 5.根据权利要求4所述的卸氨装置，其特征在于，所述第三回气管（2546）的壳体上连接有单向阀（2547）。5. The ammonia unloading device according to claim 4, characterized in that a one-way valve (2547) is connected to the shell of the third air return pipe (2546).
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CN202629585U (en) * 2012-06-19 2012-12-26 兰州蓝天浮法玻璃股份有限公司 Device for pressurizing to unload tanker ammonia by using intermediate storage tank
CN209655721U (en) * 2019-03-05 2019-11-19 天津沃特曼科技有限公司 Drying equipment is used in a kind of production of cleaning agent
CN212929524U (en) * 2020-07-28 2021-04-09 奎屯锦疆化工有限公司 A kind of synthetic ammonia compressor gas ammonia cooling system
CN217635063U (en) * 2022-03-31 2022-10-21 华能国际电力股份有限公司丹东电厂 Ammonia unloading device for replacing ammonia unloading compressor by utilizing ammonia storage tank pressure difference

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