CN105331411A - Energy-saving and rapid synthesis device and method of natural gas hydrate - Google Patents
Energy-saving and rapid synthesis device and method of natural gas hydrate Download PDFInfo
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Abstract
The invention provides an energy-saving and rapid synthesis device and method of natural gas hydrate. The synthesis device comprises a control part, an expansion power generation and refrigeration unit and a hydrate synthesis unit, wherein high-pressure natural gas is conveyed to the expansion power generation and refrigeration unit through a high-voltage pipe network, and the expansion power generation and refrigeration unit is used for recovering pressure energy of high-pressure natural gas; the high-pressure natural gas is introduced to the hydrate synthesis unit through the expansion power generation and refrigeration unit; the control part is connected with the expansion power generation and refrigeration unit and the hydrate synthesis unit respectively, acquired parameters of the hydrate synthesis unit are compared with the set level of the control part, and the high-pressure natural gas introduced into the hydrate synthesis unit is in a set range of the control part by adjusting parameters of the expansion power generation and refrigeration unit. The synthesis device recovers pressure energy of the high-pressure natural gas and rapidly synthesizes natural gas hydrate rapidly by utilizing cold energy.
Description
Technical field
The present invention relates to pressure energy utilization, cold energy use and lanthanum chloride hydrate technical field, be specifically related to a kind of Fast back-projection algorithm device and method of the energy-saving gas hydrate for industrial hydraulic recovery.
Background technology
Along with energy supply field is to the requirement of energy-saving and emission-reduction, Sweet natural gas becomes the main energy sources of naked light facility in current city, and by 2014, the consumption of China's natural gas broke through 1816 billion cubic meters.But, the 6 ~ 10MP high-pressure natural gas through high pressure pipe network conveying needs to make temperature and pressure rear up to standard be transported to resident and natural gas of industry user by gas distributing system through multi-stage pressure regulating before being taken into use.
The main voltate regulator of Throttle Principle that adopts carries out pressure regulation to Sweet natural gas at present, the potential pressure energy that enriches itself contained in high-pressure natural gas is in the process in order to up to standard and be wasted in the pressure regulation process of carrying out, and produce natural gas cold energy in pressure regulation process and be not also utilized effectively, capacity usage ratio has much room for improvement; In addition, for the reason of technology itself, current compressed natural gas ubiquity pressure store is high, Cemented filling is dumb, absorption gas storage technology relative complex, and the complex manufacturing of natural gas liquids and power consumption is higher.
Compare to compressed natural gas, gas hydrate are because its pressure store is low, storage density large, transport, store and use easy to operate advantage, become the direction of Sweet natural gas front-end processing from now on, but current synthetic method is generally also in laboratory stage, often adopt and first add wet natural gas, then the mode of synthesis of natural gas hydrate after compressor pressurizes or CNG gas tank, refrigerator cooling, combined coefficient is low and energy consumption is higher.
Summary of the invention
In view of this, the invention provides a kind of Fast back-projection algorithm device and method of energy-saving gas hydrate, be intended to by clean energy recovery approach, not only the pressure energy of Sweet natural gas is reclaimed and be used for generating, and the cold energy produced in expansion power generation process is used for producing gas hydrate fast and efficiently.
The technical solution used in the present invention is specially:
A Fast back-projection algorithm device for energy-saving gas hydrate, comprises control part, expansion power generation refrigeration unit and lanthanum chloride hydrate unit; Wherein:
High-pressure natural gas is delivered to expansion power generation refrigeration unit through high pressure pipe network, for reclaiming the pressure energy of high-pressure natural gas self; Described lanthanum chloride hydrate unit is led to through described expansion power generation refrigeration unit;
Described control part is connected with described lanthanum chloride hydrate unit with described expansion power generation refrigeration unit respectively, to the parameter of lanthanum chloride hydrate unit be gathered compared with the setting level of described control part, by the parameter of adjustment expansion power generation refrigeration unit, for ensureing that the high-pressure natural gas of leading in lanthanum chloride hydrate unit is in the setting range in described control part.
In the Fast back-projection algorithm device of above-mentioned energy-saving gas hydrate, described control part comprises central controller and the valve unit be connected with described central controller respectively and sensor unit; Wherein:
Described valve unit comprises the first valve and the second valve, and described first valve is located between expansion power generation refrigeration unit front end and high pressure pipe network, and described second valve is located between lanthanum chloride hydrate unit rear end and described low-pressure pipe network;
Described sensor unit comprises the first temperature sensor, the second temperature sensor and pressure transmitter, described pressure transmitter and the first temperature sensor are respectively used to detect the pressure and temperature of Sweet natural gas for reacting in described lanthanum chloride hydrate unit, and described second temperature sensor is for detecting the natural gas temperature of heat exchanger exit in described lanthanum chloride hydrate unit.
In the Fast back-projection algorithm device of above-mentioned energy-saving gas hydrate, described expansion power generation refrigeration unit comprises excitation module, generator and decompressor; Described central controller is connected with generator through described excitation module, and described generator is connected to described lanthanum chloride hydrate unit through described decompressor; Wherein:
High-pressure natural gas enters described decompressor through described first valve, and after expanding in described decompressor, drive decompressor to rotate, described decompressor drives generator rotation further, is reclaimed by the pressure energy of high-pressure natural gas self by generating;
Described central controller according in the described lanthanum chloride hydrate unit detected for the gas pressure that reacts and temperature signal, regulate through the parameter of described excitation module to described generator and described decompressor.
In the Fast back-projection algorithm device of above-mentioned energy-saving gas hydrate, described lanthanum chloride hydrate unit comprises reactor, shower nozzle and bleed valve, described first temperature sensor is connected with described reactor respectively with described pressure transmitter, and described shower nozzle is located at the water source incoming end of described reactor; Wherein:
The water source of hydrate is delivered in reactor successively after topping-up pump and shower nozzle supercharging and atomization, and the Sweet natural gas up to standard with temperature, pressure contacts, and the gas hydrate of generation dock with target use side through bleed valve.
In the Fast back-projection algorithm device of above-mentioned energy-saving gas hydrate, described lanthanum chloride hydrate unit also comprises interchanger, device for drying and filtering and voltate regulator, the Sweet natural gas of hydrate is not generated successively through described interchanger in reactor, after the dry and pressure regulation process of described device for drying and filtering and described voltate regulator, low-pressure pipe network is delivered to through described second valve, the thermal source of peripheral hardware is connected with interchanger by recycle pump, frequency-variable module is provided with between described central control unit and described recycle pump, described interchanger does not generate the Sweet natural gas of hydrate for heating, described central controller is by the temperature signal that compares the second temperature sensor and detect and the set(ting)value of low-pressure pipe network, the flow rate of heat medium of described recycle pump is adjusted by frequency-variable module.
In the Fast back-projection algorithm device of above-mentioned energy-saving gas hydrate, described pressure transmitter is located between described decompressor and described reactor.
In the Fast back-projection algorithm device of above-mentioned energy-saving gas hydrate, described first temperature sensor is located in described reactor, and the exit end of described interchanger is located at by described second temperature sensor.
A fast synthesis method for energy-saving gas hydrate, the high-pressure natural gas in high pressure pipe network carries out pressure energy recovery at expansion power generation refrigeration unit, and the cold energy produced in pressure energy reclaims generates gas hydrate at lanthanum chloride hydrate unit, wherein:
Pressure energy recycling step is specially:
The high-pressure natural gas of high pressure pipe network enters after decompressor through the first valve and expands in decompressor, and the pressure energy of release makes decompressor rotate, and the rotation of decompressor drives the generator rotation generating being attached thereto and connecing, and is reclaimed by pressure energy and is converted into electric energy;
Cold energy use step is specially:
Relief pressure can carry out caloic exchange by the mode directly contacted with the hydrophily of supercharging, atomization by the rear Sweet natural gas of temperature reduction in the reactor, in the process generating hydrate, reclaimed the cold energy of Sweet natural gas.
In the fast synthesis method of above-mentioned energy-saving gas hydrate, in described pressure energy recycling step, central controller is according to the gas pressure in the reactor detected and temperature signal, by the magnetizing current of excitation module regulator generator, the rotating speed of generator and decompressor is changed, the pressure and temperature being adjusted the Sweet natural gas entered in reactor by the change of rotating speed is set(ting)value.
In the fast synthesis method of above-mentioned energy-saving gas hydrate, in described cold energy use step, heating agent is sent into interchanger by recycle pump and is carried out preheating to the Sweet natural gas not generating hydrate, central controller realizes the adjustment of heat exchange level, until pass into low-pressure pipe network after being preheated to set(ting)value by the flow of heating agent in frequency-variable module adjustment recycle pump.The beneficial effect that the present invention produces is:
The Fast back-projection algorithm device of energy-saving gas hydrate of the present invention utilizes decompressor and generator to reclaim in high-pressure natural gas the pressure of self, and is translated into electric energy; By detecting the temperature and pressure in synthesis reactor in real time, guarantee that Sweet natural gas and water source contact process is in the reactor in the condition generating gas hydrate, utilize cold energy and the pressure of high-pressure natural gas self, exchange by directly contacting the caloic of carrying out in the reactor with water, generate gas hydrate fast and efficiently, efficiency utilization is achieved to the pressure energy of high-pressure natural gas and cold energy; Both the pressure energy having achieved Sweet natural gas reclaims, and takes full advantage of again the cold energy self had after Sweet natural gas expands, reclaims and utilize the energy be originally wasted in the energy self;
And, the structure of device is simple, easy to operate, low cost of manufacture, can be used for the pressure energy of natural gas generating of large, medium and small scale and the production of gas hydrate, be particularly useful for the medium and small gas pressure regulating station needing gas voltage regulating station Sweet natural gas being carried out to pressure regulation.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, more completely the present invention can be understood better.Accompanying drawing described herein is used to provide a further understanding of the present invention, and embodiment and explanation thereof, for explaining the present invention, do not form inappropriate limitation of the present invention.
Fig. 1 is the structural representation of the Fast back-projection algorithm device of a kind of energy-saving gas hydrate of the present invention.
In figure: 10, central controller 11, first valve 12, pressure transmitter 13, first temperature sensor 14, second valve 20, excitation module 21, generator 22, decompressor 23, device for drying and filtering 24, relief valve 30, water source 31, topping-up pump 32, shower nozzle 33, reactor 34, bleed valve 40, thermal source 41, recycle pump 42, interchanger 43, frequency-variable module 44, second temperature sensor.
Embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail.
The Fast back-projection algorithm device of a kind of energy-saving gas hydrate as shown in Figure 1, mainly comprises control part, expansion power generation refrigeration unit, lanthanum chloride hydrate unit; High-pressure natural gas through the Cemented filling of high pressure pipe network to expansion power generation refrigeration unit, for reclaiming the pressure energy of high-pressure natural gas self; Control part, by Real-Time Monitoring lanthanum chloride hydrate unit, ensures that the temperature and pressure of the high-pressure natural gas of leading in lanthanum chloride hydrate unit is the level set by control part, realizes efficiently synthesizing; Particularly:
Control part mainly comprises central controller 10, first valve 11, first temperature sensor 13, pressure transmitter 12, second valve 14, frequency-variable module 43 and the second temperature sensor 44, and central controller 10 is connected with valve (11,14), sensor (12,13,44), frequency-variable module 43 and excitation module 20 respectively by signal cable; Wherein: the first valve 11 is located at the high pressure pipe network of expansion power generation refrigeration unit front end, second valve 14 is connected to low-pressure pipe network, pressure transmitter 12 and the first temperature sensor 13 are respectively used to gas pressure in detection reaction device and temperature, excitation module 20 is connected with expansion power generation refrigeration unit, signal according to sensor (12,13) carries out suitable adjustment to expansion power generation refrigeration unit, and frequency-variable module 43 is for regulating the flow rate of heat medium of recycle pump 41;
Expansion power generation refrigeration unit mainly comprises excitation module 20, generator 21 and decompressor 22; Central controller 10 is connected with excitation module 20 by signal cable, is connected to reactor 33 successively afterwards through generator 21 and decompressor 22, and namely pressure transmitter 12 is located between decompressor 22 and reactor 33;
Lanthanum chloride hydrate unit mainly comprises reactor 33, shower nozzle 32, bleed valve 34, interchanger 42, device for drying and filtering 23 and voltate regulator 24, hydrophily needed for hydrate is delivered to Sweet natural gas up to standard with temperature, pressure in reactor 33 through shower nozzle 32 through topping-up pump 31 and is contacted by water source, and the hydrate of generation docks with target through bleed valve 34;
The Sweet natural gas not forming hydrate carries out backheat, drying and pressure regulation process through interchanger 42, device for drying and filtering 23 and voltate regulator 24 successively, after be transported to low-pressure pipe network through the second valve 14, namely the first temperature sensor 13 is located in reactor 33; Particularly:
Heating agent in thermal source 40 enters interchanger 42 through recycle pump 41 under the effect of recycle pump 41, thermal source 40 is returned after carrying out heat exchange with the Sweet natural gas not forming hydrate, central controller 10 detects the natural gas temperature after heat exchange according to by the second temperature sensor 44, by with drop into low-pressure pipe network natural gas temperature set(ting)value compared with, the instruction of adjustment recycle pump 41 flow rate of heat medium is sent, till making the natural gas temperature at the second temperature sensor 44 place reach set(ting)value to frequency-variable module 43.
Central control unit 10 is connected with the second valve 14 respectively with the first valve 11, is for ensureing that Fast back-projection algorithm device of the present invention and high pressure pipe network and low-pressure pipe network are in UNICOM's state all the time.
Preferred as one, reactor 33 selects hybrid heat and mass exchanger, decompressor 22 can select single-screw expander, twin-screw expander, scroll expander, rolling-rotor decompressor or piston expansion engine (usually selecting single-screw expander), heating agent selective chlorination natrium brine or mineral substance water source, first valve 11 and the second valve 24 select electric control starting valve and pneumatic starting valve respectively, according to the flow of Sweet natural gas, decompressor 22 can select one group or many groups.
The high-pressure natural gas that high pressure pipe network conveying is being come in by said apparatus transfers in the process of gas hydrate, and concrete process is:
The principle of work of control part is:
Central controller 10 is by the gas pressure of pressure transmitter 12 detection reaction device 33 front end, if the gas pressure detected is lower than gas pressure set in central controller 10, then central controller 10 is based on the pressure signal received, the signal of the magnetizing current reducing generator 21 is sent to excitation module 20, generator 21 is according to the magnetizing current signal received, the rotating speed of generator 21 and decompressor 22 is raised simultaneously, gas pressure in decompressor 22 also increases, until the gas pressure that central controller 10 detects is not less than the set(ting)value in central controller,
Now central controller 10 is by the natural gas temperature in the first temperature sensor 13 detection reaction device 33, if the natural gas temperature detected is higher than the natural gas temperature of setting in central controller 10, then center-control 10 device is based on the temperature signal received, the signal reducing magnetizing current is sent to excitation module 20, generator 21 is according to the magnetizing current signal received, the rotating speed of generator 21 and decompressor 22 is raised simultaneously, reduced by natural gas temperature after decompressor 22, until the natural gas temperature that central controller 10 detects is not higher than the set(ting)value in central controller 10, if the natural gas temperature detected is lower than the natural gas temperature of setting in central controller 10, then described central controller 10 not therefore action, does not namely send any control signal and refers to excitation module 20.
The workflow of expansion power generation refrigeration unit is:
High pressure pipe network Sweet natural gas (normal temperature or a little less than normal temperature, be defined as low temperature) enter decompressor 22 through the first valve 11, expand in decompressor 22, on the one hand because pressure reduces the Sweet natural gas forming low-temp low-pressure, decompressor is driven to rotate on the other hand, decompressor 22 drive electrical generators 21 rotates generating, excitation module 20 is according to the rotating speed of the exciting current adjustment generator 21 of the excitation signal regulator generator 21 received, and then the flow of Sweet natural gas in decompressor 22 is regulated, the natural gas via pipeline of low-temp low-pressure enters reactor 33;
Topping-up pump 21 extracts the hydrophily in water source 31, the nozzle 32 docked as reactor 33 is carried after hydraulic pressure being brought up to spraying pressure, the size of spraying pressure decides fogging degree and injection flow rate, and spraying pressure herein must higher than the gas pressure in reactor 33.Spray in reactor 33 through nozzle 32 after hydraulic atomized, from Sweet natural gas and the water smoke of decompressor 22 after reactor 33 carries out caloic exchange by the mode directly contact, a part of formation hydrate, another part does not then have; Wherein:
The part discharge reactor 33 forming hydrate docks with target use side through bleed valve 34, the Sweet natural gas not forming hydrate then first preheats through interchanger 42, for improving the natural gas temperature inputing to low-pressure pipe network, thus adapt to the operational conditions of low-pressure pipe network better, enter device for drying and filtering 23 afterwards, then after voltate regulator 24 pressure regulation, low-pressure pipe network (obviously, the gas pressure in reactor 33 is higher than the pressure of low-pressure pipe network) is delivered to through the second valve 14.
In practice, first start the central controller 10 supplying high-pressure air to each operated pneumatic valve, then central controller 10 sends start signal to the first valve 11 and the second valve 14, opens two valves; By the natural gas temperature in real time repeatedly in detection reaction device and pressure, by the rotating speed regulating the output magnetizing current of excitation module 20 to come regulator generator 21 and decompressor 22, until the natural gas temperature that central controller 10 detects is not higher than the set temperature value of central controller 10, till gas pressure is not less than the setup pressure value of central controller 10; By startup topping-up pump 31 and shower nozzle 33, high-pressure atomization water is sent into reactor after natural gas temperature pressure is up to standard, making low-temp low-pressure Sweet natural gas and high-pressure atomization water carry out caloic exchange by directly contacting, generating gas hydrate.
Can find out, device of the present invention formed gas hydrate process in, by the temperature to Sweet natural gas end, pressure-controlling, and the pressure of water source end, atomization control, achieve the hydration to Sweet natural gas fast and efficiently.
As mentioned above, embodiments of the invention are explained, obviously, as long as do not depart from fact inventive point of the present invention and effect, will be readily apparent to persons skilled in the art distortion, is also all included within protection scope of the present invention.
Claims (10)
1. a Fast back-projection algorithm device for energy-saving gas hydrate, is characterized in that, comprises control part, expansion power generation refrigeration unit and lanthanum chloride hydrate unit; Wherein:
High-pressure natural gas is delivered to expansion power generation refrigeration unit through high pressure pipe network, for reclaiming the pressure energy of high-pressure natural gas self; Described lanthanum chloride hydrate unit is led to through described expansion power generation refrigeration unit;
Described control part is connected with described lanthanum chloride hydrate unit with described expansion power generation refrigeration unit respectively, to the parameter of lanthanum chloride hydrate unit be gathered compared with the setting level of described control part, by the parameter of adjustment expansion power generation refrigeration unit, for ensureing that the high-pressure natural gas of leading in lanthanum chloride hydrate unit is in the setting range in described control part.
2. the Fast back-projection algorithm device of energy-saving gas hydrate according to claim 1, is characterized in that, described control part comprises central controller and the valve unit be connected with described central controller respectively and sensor unit; Wherein:
Described valve unit comprises the first valve and the second valve, and described first valve is located between expansion power generation refrigeration unit front end and high pressure pipe network, and described second valve is located between lanthanum chloride hydrate unit rear end and described low-pressure pipe network;
Described sensor unit comprises the first temperature sensor, the second temperature sensor and pressure transmitter, described pressure transmitter and the first temperature sensor are respectively used to detect the pressure and temperature of Sweet natural gas for reacting in described lanthanum chloride hydrate unit, and described second temperature sensor is for detecting the natural gas temperature of heat exchanger exit in described lanthanum chloride hydrate unit.
3. the Fast back-projection algorithm device of energy-saving gas hydrate according to claim 2, is characterized in that, described expansion power generation refrigeration unit comprises excitation module, generator and decompressor; Described central controller is connected with generator through described excitation module, and described generator is connected to described lanthanum chloride hydrate unit through described decompressor; Wherein:
High-pressure natural gas enters described decompressor through described first valve, and after expanding in described decompressor, drive decompressor to rotate, described decompressor drives generator rotation further, is reclaimed by the pressure energy of high-pressure natural gas self by generating;
Described central controller according in the described lanthanum chloride hydrate unit detected for the gas pressure that reacts and temperature signal, regulate through the parameter of described excitation module to described generator and described decompressor.
4. the Fast back-projection algorithm device of energy-saving gas hydrate according to claim 3, it is characterized in that, described lanthanum chloride hydrate unit comprises reactor, shower nozzle and bleed valve, described first temperature sensor is connected with described reactor respectively with described pressure transmitter, and described shower nozzle is located at the water source incoming end of described reactor; Wherein:
The water source of hydrate is delivered in reactor successively after topping-up pump and shower nozzle supercharging and atomization, and the Sweet natural gas up to standard with temperature, pressure contacts, and the gas hydrate of generation dock with target use side through bleed valve.
5. the Fast back-projection algorithm device of energy-saving gas hydrate according to claim 4, it is characterized in that, described lanthanum chloride hydrate unit also comprises interchanger, device for drying and filtering and voltate regulator, the Sweet natural gas of hydrate is not generated successively through described interchanger in reactor, after the dry and pressure regulation process of described device for drying and filtering and described voltate regulator, low-pressure pipe network is delivered to through described second valve, the thermal source of peripheral hardware is connected with interchanger by recycle pump, frequency-variable module is provided with between described central control unit and described recycle pump, described interchanger does not generate the Sweet natural gas of hydrate for heating, described central controller is by the temperature signal that compares the second temperature sensor and detect and the set(ting)value of low-pressure pipe network, the flow rate of heat medium of described recycle pump is adjusted by frequency-variable module.
6. the Fast back-projection algorithm device of energy-saving gas hydrate according to claim 4, is characterized in that, described pressure transmitter is located between described decompressor and described reactor.
7. the Fast back-projection algorithm device of energy-saving gas hydrate according to claim 5, is characterized in that, described first temperature sensor is located in described reactor, and the exit end of described interchanger is located at by described second temperature sensor.
8. the fast synthesis method of energy-saving gas hydrate, it is characterized in that, high-pressure natural gas in high pressure pipe network carries out pressure energy recovery at expansion power generation refrigeration unit, and the cold energy produced in pressure energy reclaims generates gas hydrate at lanthanum chloride hydrate unit, wherein:
Pressure energy recycling step is specially:
The high-pressure natural gas of high pressure pipe network enters after decompressor through the first valve and expands in decompressor, and the pressure energy of release makes decompressor rotate, and the rotation of decompressor drives the generator rotation generating being attached thereto and connecing, and is reclaimed by pressure energy and is converted into electric energy;
Cold energy use step is specially:
Relief pressure can carry out caloic exchange by the mode directly contacted with the hydrophily of supercharging, atomization by the rear Sweet natural gas of temperature reduction in the reactor, in the process generating hydrate, reclaimed the cold energy of Sweet natural gas.
9. the fast synthesis method of energy-saving gas hydrate according to claim 8, it is characterized in that, in described pressure energy recycling step, central controller is according to the gas pressure in the reactor detected and temperature signal, by the magnetizing current of excitation module regulator generator, the rotating speed of generator and decompressor is changed, the pressure and temperature being adjusted the Sweet natural gas entered in reactor by the change of rotating speed is set(ting)value.
10. the fast synthesis method of energy-saving gas hydrate according to claim 8, it is characterized in that, in described cold energy use step, heating agent is sent into interchanger by recycle pump and is carried out preheating to the Sweet natural gas not generating hydrate, central controller realizes the adjustment of heat exchange level, until pass into low-pressure pipe network after being preheated to set(ting)value by the flow of heating agent in frequency-variable module adjustment recycle pump.
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| CN105331411B (en) | 2018-01-05 |
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