GWJOil-free silent air pump air compressor
（The motor has a copper core coil, which is not silent, and the sound is very small compared with ordinary）| model | Power (w) | Speed ??(r/min) | Pressure (bar) | Nominal volume flow (l/min) | Total Weight（kg） |
| gwj 550w | 550w | 1380 | 7.0 | 100 | 21 |
| gwj 780w | 780w | 1380 | 7.0 | 165 | 25 |
| gwj 1100w | 1100w | 1380 | 7.0 | 200 | 42 |
Oil-free silent air compressors are widely used in the fields of dentistry, breeding, food, medicine, fitness, cosmetology, chemical industry, scientific experiment, etc. because they can provide oil-contaminated, pure and environmentally-friendly air source. They can also be used as vacuum pumps.
GWJThe main advantages of oil-free silent air pump air compressor are as follows:
1. The motor adopts advanced design system for optimized design to ensure that the compressor achieves high power, high efficiency, low energy consumption, high performance and high reliability.
2. The piston ring is designed with a new environmentally friendly material, with a small friction coefficient and self-lubricating. It replaces the history of traditional piston engine oil lubrication. More importantly, it will not produce harmful gases containing any oil and cause no secondary damage to the gas source. Pollution.
3. The cylinder liner adopts advanced surface hardening technology to reduce thickness and accelerate heat transfer; effectively improve the surface density and wear resistance, and reduce the coefficient of friction. Thereby prolonging the service life, reducing maintenance time and costs.
4. The intake and exhaust valve discs are made of Swedish valve steel belt after more than 80 hours of precision rolling treatment. With a reasonable noise reduction design, the volumetric efficiency is improved and the noise is significantly lower than other similar products.
5. Multiple pressure and overload protection to ensure smooth and reliable operation of the machine.
6. The design of the whole machine is thoughtful and thoughtful, flexible to move, simple to operate, and convenient to maintain
Buyers note: The machine head will get hot after running for a certain period of time. This is a normal phenomenon. It is the same as the exhaust pipe of a motorcycle. It dissipates heat. If there are children in the house, please pay attention and touch it by hand. Thank you! !
Welcome to consult
...alked! How I ran
sometimes! How I looked forward to catch the first view of the
well-known woods! With what feelings I welcomed single trees I
knew, and familiar glimpses of meadow and hill between them!
Charlotte Bront. ElecBook Classics
Jane Eyre 602
At last the woods rose; the rookery clustered dark; a loud
cawing broke the morning stillness. Strange delight inspired me:
on I hastened. Another field crossed―a lane threaded―and there
were the courtyard walls―the back offices: the house itself, the
rookery still hid.“My first view of it shall be in front,” I
determined,“where its bold battlements will strike the eye nobly
at once, and where I can single out my master’s very window:
perhaps he will be standing at it―he rises early: perhaps he is now
walking in the orchard, or on the pavement in front. Could I but
see him!―but a moment! Surely, in that case, I should not be so
mad as to run to him? I cannot tell―I am not certain. And if I
did―what then? God bless him! What then? Who would be hurt
by my once more tasting the life his glance can give me? I rave:
perhaps at this moment he is watching the sun rise over the
Pyrenees, or on the tideless sea of the south.”
I had coasted along the lower wall of the orchard―turned its
angle: there was a gate just there, opening into the meadow,
between two stone pillars crowned by stone balls. From behind
one pillar I could peep round quietly at the full front of the
mansion. I advanced my head with precaution, desirous to
ascertain if any bedroom window-blinds were yet drawn up:
battlements, windows, long front―all from this sheltered station
were at my command.
The crows sailing overhead perhaps watched me while I took
this survey. I wonder what they thought. They must have
considered I was very careful and timid at first, and that gradually
I grew very bold and reckless. A peep, and then a long stare; and
then a departure from my niche and a straying out into the
meadow; and a sudden stop full in front of the great mansion, and
Charlotte Bront. ElecBook Classics
Jane Eyre 603
a protracted, hardy gaze towards it.“What affectation of diffidence
was this at first?” they might have demanded;“what stupid
regardlessness now?”
Hear an illustration, reader.
A lover finds his mistress asleep on a mossy bank; he wishes to
catch a glimpse of her fair face without waking her. He steals softly
over the grass, careful to make no sound; he pauses―fancying she
has stirred: he withdraws: not for worlds would he be seen. All is
still: he again advances: he bends above her; a light veil rests on
her features: he lifts it, bends lower; now his eyes anticipate the
vision of beauty―warm, and blooming, and lovely, in rest. How
hurried was their first glance! But how they fix! How he starts!
How he suddenly and vehemently clasps in both arms the form he
dared not, a moment since, touch with his finger! How he calls
aloud a name, and drops his burden, and gazes on it wildly! He
thus grasps and cries, and gazes, because he no longer fears to
waken by any sound he can utter―by any movement he can make.
He thought his love slept sweetly: he finds she is stone dead.
I looked with timorous joy towards a stately house: I saw a
blackened ruin.
No need to cower behind a gate-post, indeed!―to peep up at
chamber lattices, fearing life was astir behind them! No need to
listen for doors opening―to fancy steps on the pavement or the
gravel-walk! The lawn, the grounds were trodden and waste: the
portal yawned void. The front was, as I had once seen it in a
dream, but a well-like wall, very high and very fragile-looking,
perforated with paneless windows: no roof, no battlements, no
chimneys―all had crashed in.
And there was the silence of death about it: the solitude of a
Charlotte Bront. ElecBook Classics
Jane Eyre 604
lonesome wild. No wonder that letters addressed to people here
had never received an answer: as well despatch epistles to a vault
in a church aisle. The grim blackness of the stones told by what
fate the Hall had fallen―by conflagration: but how kindled? What
story belonged to this disaster? What loss, besides mortar and
marble and wood-work had followed upon it? Had life been
wrecked as well as property? If so, whose? Dreadful question:
there was no one here to answer it―not even dumb sign, mute
toke... my country''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s economy will maintain steady and rapid growth, and energy demand will continue to increase. By 2020, at least 3 billion tons of standard coal may be needed.”Although the total amount of coal resources is so large, Hong Shaohe is not optimistic at all, because“The per capita recoverable reserves are only about half of the world average. The rational development and utilization of coal resources is an arduous task facing the coal industry”.
The reality is that the overall energy utilization efficiency of the coal industry is low, about 28%, which is 4 percentage points lower than the national energy utilization rate and more than 10 percentage points lower than that of developed countries. Therefore, the coal industry is related to steel, non-ferrous metals, electric power, petrochemicals, etc. The industry has been listed as the 9 major energy-consuming industries by relevant departments.
“Regardless of whether it is from the world''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s energy supply pattern or from the needs of my country''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s economic development, energy conservation in the coal industry is related to energy security and the sustained and stable development of the national economy and society.”Hong Shaohe said.
This is the direct reason for the launch of the "Opinions" discussion draft.
The difficulties are great, the potential is great
The coal industry’s energy-saving goal formulated in the "Opinions" discussion draft is to“”At the end of the period, the comprehensive energy consumption of the added value of my country''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s coal industry decreased by 22% compared with 2005. The comprehensive utilization rate of coal gangue and coal slime and other solid wastes, mine gas drainage utilization rate, washing proportion, and mine water utilization rate reached 70%, respectively. 60%, 50% and 70%.
Relevant data show that the current comprehensive utilization rate of coal gangue and coal slime and other solid wastes, mine gas drainage utilization rate, proportion of incoming washing, and mine water utilization rate are about 50%, 20%, 33% and mine water respectively. 30%-40%.
“To achieve these goals is difficult and the task is heavy.”Hong Shaohe said,“However, we must realize that this goal was put forward on the basis of full investigation and research, and there is still great potential for energy conservation in my country''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s coal industry.”
According to statistics, the energy consumption of my country''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s coal industry last year reached more than 85 million tons of standard coal, accounting for 5.48% of the coal output that year. With the addition of washing losses, the industry''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s own energy consumption was equivalent to nearly 180 million tons of commercial coal consumption. At the same time, the average recovery rate of coal resources in my country is low. The recovery rate of small coal mines, which accounts for about 38% of the national coal output, is only 10%-15%.
Another problem is the low average production efficiency. Last year, my country’s coal mines employed about 5.5 million people, and the per capita output was less than 400 tons, which were 1/24 and 1/20 of Australia’s. At present, the average efficiency of main ventilators, main drainage pumps and industrial boilers in key state-owned coal mines is about 15-20% lower.
This is true for key state-owned coal mines, not to mention other small coal mines with outdated technical conditions.
Hong Shaohe believes that my country''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s coalbed methane development is in its infancy, the low-calorific value resources are underutilized, and the production efficiency is low. This shows that the coal industry has great potential for energy conservation.
Long-term planning and short-term arrangements are impossible
“Energy conservation in the coal industry requires the attention of government departments. We are also actively doing work in this area, hoping to promote the introduction of relevant policies.”Hong Shaohe said.
Hong Shaohe''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s statement is related to the status of industry associations. Because the discussion draft of the "Opinions" is just a copy“instructions”, Does not constitute a coercive force on coal companies; moreover, industry associations are in parallel with power, and there is no practical means to ensure the realization of energy-saving goals.
“Some energy-saving technologies are not complicated, but why are they popularized? One of the main reasons is the lack of relevant incentives and punishment mechanisms.”Hong Shaohe said.
For example, Hong Shaohe said that the entry rate has been hovering around 33% for a long time, while the developed entry rate is generally above 90%.“The average coal ash content is about 28%. With so much ash content running across the country, how much capacity is wasted? When it is used, it also reduces the utilization efficiency and increases pollution.”
Data show that 60%-70% of sulfur and carbon compound pollution comes from burning coal. If these burning coals are washed, the above-mentioned pollution can be reduced by half, because the ash content of metallurgical coal can be reduced to less than 10% after washing. Ash content can be reduced to 15%-16%.
Hong Shaohe believes that the main reason for the above situation is that companies do not consider long-term development driven by short-term interests and do not pay attention to the adoption of energy-saving technologies.
“In this regard, there must be both long-term planning and short-term arrangements. There is a lot of work that needs to be done by the government.”Hong Shaohe revealed that relevant departments are studying and formulating the "Coal Industry Development Policy" and the "Access Conditions for Coal Mine Startup".“It is hoped that these policies can be introduced soon, which can encourage the coal industry to increase investment in science and technology and promote energy-saving technologies.”
my country''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s technology imports in the first three quarters amounted to 17.9 billion U.S. dollars
According to new statistics from the Ministry of Commerce, in the first three quarters, a total of 8,112 technology introduction contracts were registered nationwide, with a total contract value of US$17.95 billion, a year-on-year increase of 45.2%; of which technical expenses were US$11.55 billion, accounting for 64.3% of the total contract value. Technology introduction continued to maintain a substantial increase.
In the first three quarters, the transaction volume of proprietary technology licensing contracts was US$5.58 billion, a year-on-year increase of 57.5%, accounting for 31.1% of the total contract value. The contract value of technical consultation, technical service and joint venture and cooperative production with technology introduction content was US$4.05 billion and US$3.72 billion respectively, accounting for 22.5% and 20.7% of the amount of technology introduction, ranking second and third respectively.
The amount of technology imported by foreign-funded enterprises was US$8.69 billion, a year-on-year increase of 49.0%, accounting for 48.4% of the total national technology import. The total amount of technology imported by state-owned enterprises was US$8.04 billion, a year-on-year increase of 55.4%, accounting for 44.8% of the total national technology import.
The railway transportation industry has registered a total of 3.98 billion US dollars in technology import contracts, accounting for 22.2% of the total industry technology import contracts. The railway transportation industry is still a large-scale and fast-growing industry in my country. The technology introduction of the electronic and communication equipment manufacturing industry continued to maintain rapid growth. The industry introduced a total of 1,186 technologies with a contract value of US$3.49 billion, a year-on-year increase of 123.7% and accounting for 19.5% of the total industry technology introduction contracts.
Overheating of coal chemical industry planning in some areas of China
The National Development and Reform Commission recently concluded its investigation of coal chemical industry in Shanxi, Shaanxi, Inner Mongolia and other provinces. The survey found that although the structural adjustment of the coke and calcium carbide industries has achieved initial results, there is still serious overcapacity, and there are some areas.“Planning for overheating”The research team recommends that the "Coal Chemical Industry Policy" be released as soon as possible, and to increase support for independent intellectual property technology.
The survey found that in the recent period, high oil prices in the international market have stimulated the coal-rich areas to develop the coal chemical industry. There are currently 30 coal chemical projects under construction, with a total investment of more than 80 billion yuan. The new production capacity is 8.5 million tons of methanol, 900,000 tons of dimethyl ether, 1 million tons of olefins, and 1.24 million tons of coal-to-liquid. The registered production capacity of methanol projects is 34 million tons, olefins 3 million tons, and coal-to-liquid 3 million tons. Some regions ignore the blindness of technology, market, resources, ecology, environment, etc.