A boiler provided with an external steam heater comprises a hearth (1) which is connected with a rear flue (2). A partition wall (5) in the middle of the rear flue (2) divides the rear flue (2) into a front rear flue (3) and a back rear flue (4). A first heat-absorbing surface (6) is provided in the front rear flue (3), and a first smoke-regulating baffle (8) is provided below the first heat-absorbing surface (6). A second heat-absorbing surface (7) is provided in the back rear flue (4), and a second smoke-regulating baffle (9) is provided below the second heat-absorbing surface (7). The boiler is characterized in that a heat-absorbing surface of the external steam heater is only provided in the first heat-absorbing surface or the second heat-absorbing surface. The external steam heater comprises an external steam heater inlet header (13) and an external steam heater outlet header (14), and the external steam heater inlet header (13) and the external steam heater outlet header (14) are respectively connected with two ends of the heat-absorbing surface of the external steam heater. The boiler has a simple structure and small occupation area, reduces the cost, and has good regulation performance.

A rich-lean pulverized coal separation and arrangement mode of direct-flow burners in eight corners with double fireballs for burning anthracite coal comprises a boiler body (1), a furnace (2), a coal grinding mill (3), a rich-lean pulverized coal separator (4), a pulverized coal pipe (5), a primary air/rich pulverized coal nozzle (6) and a primary air/lean pulverized coal nozzle (7). Each boiler body (1) is provided with eight groups of burners (10) which are located at the same level wherein four groups of burners (10) form an imaginary tangential circle (11) inside the furnace (2), and the other four groups of burners (10) form another imaginary tangential circle (12) inside the furnace (2). Each group of burners (10) is divided into two subgroups in the vertical direction wherein the first subgroup of burners (10) is named a primary air/rich pulverized coal burner, and the second subgroup of burners (10) is named a primary air/lean pulverized coal burner. On the premise of ensuring the power of the entire boiler, the rich-lean pulverized coal separate arrangement mode of direct-flow burners in eight corners with double fireballs can cause the thermal load of the wall of a burner zone to be relatively high; and the timely inflaming of anthracite pulverized coal air flow and the stable combustion of the boiler at low-load without fuel can be ensured.

Disclosed is a power station boiler economizer, comprising a feed water pipeline (4), an inlet header box (1), a heat exchange surface (2), an outlet header box (3) and an outlet pipeline (8), wherein the feed water is heated when the flue gas flows through the outside of the heat exchange surface (2), a first bypass pipeline (5) is provided between the feed water pipeline (4) and the outlet pipeline (8) for connecting the two, and furthermore, the first bypass pipeline (5) is provided with a bypass temperature-regulation device (9).

A tower-type boiler with a primary reheater and a secondary reheater is provided. A super heater of the boiler comprises a low-temperature super heater and a high-temperature super heater (31). A main steam system flow of the boiler comprises the following steps: firstly, feeding water enters into a front flue coal economizer and a rear flue coal economizer (10) which are arranged in parallel, then water came from the outlets of the coal economizers (10) enters into water-cooling walls (1, 2) from the lower part of a hearth (6), wherein the outlets of the water-cooling walls (1, 2) are connected to a separator (19), and at last, the steam came out of the separator (19) enters into the low-temperature super heater and the high-temperature super heater (31) successively. Along the steam flow direction which is from a low temperature to a high temperature at the side of the steam, the primary reheater successively comprises a primary reheating low-temperature reheater (11) and a primary reheating high-temperature reheater, and the secondary reheater successively comprises a secondary reheating low-temperature reheater (12) and a secondary reheating high-temperature reheater. Furthermore, the primary reheater and the secondary reheater are in parallel with each other in a perpendicular flue.

The purpose of the present invention is to provide a packaging machine and packaging method capable of holeless bag packaging in which a small hole or ventilating portion is not provided, so there is no contamination of the inside of a packaging bag by foreign matter such as insects, and whereby damage to the packaging bag or load shifting during loading, transport, etc. is better prevented by more reliable deaeration. This packaging machine has a closure means (4) for pinching closed the vicinity of a mouth (a) of a packaging bag (A) from the front and back of the packaging bag (A) into which a deaeration nozzle (3) is inserted, an airway maintaining means (10), a shaping pressing means (20), and a tack sealing means (40).

A method of vehicle stability control including the steps of: a) applying a test braking pulse to a wheel on a first side of the vehicle and to a wheel on a second, opposite, side of the vehicle, the application of the test braking pulse comprising operating a brake actuator to apply a low level braking pressure to the wheel, b) measuring the rotational speed of both wheels during the test braking pulse, c) calculating a change in wheel speed during the test braking pulse for each wheel, d) calculating the difference between the change in speed of the wheel at the first side of the vehicle and the change in speed of the wheel at the second side of the vehicle, e) carrying out a stability control intervention if the said difference exceeds a predetermined threshold.

A counter assembly including an actuatable component. A counter component is disposed with the actuatable component and initially in a first position relative the actuatable component and movable with respect to the actuatable component. A lock member is engaged in a track formed between the actuatable component and the counter component. The lock member is operatively arranged for enabling relative movement between the actuatable component and the lock member in a first direction only and between the counter component and the lock member in a second direction only. At least one iteration of travel of the counter component to a second position relative the actuatable component and back to the first position progresses the lock member incrementally along the track. The actuatable component is immovably locked to the counter component by the lock member when the lock member has reached an end of the track.

A plug drop tool, including a body defining a chamber, a plug initially housed in the chamber and a member disposed with the body. The member is actuatable for selectively enabling communication between the chamber and an annulus at least partially defined by the body. The plug is movable into the annulus when the communication is enabled.

The present disclosure relates to a plug-in connection (10), in particular for hydraulic hose lines. The plug-in connection (10) may comprise a first plug connector part (1) having a circumferential groove on a plug-in nipple (3), a plug-in sleeve (3) as the female part having two transverse bores (9), a fork- shaped coupling bracket (5). The fork-shaped coupling bracket (5) may comprise two bracket portions (7) and one bracket curve (6), which bracket (5) may be being inserted, in the mounted state of the plug-in sleeve (3) and the plug-in nipple (2), into the transverse bores (9) for locking the plug-in connection to the bracket portions (7) and penetrate the groove (16) transversely with respect to the plug-in axis. A retaining element (30) for retaining the coupling bracket (5) against unwanted release may be provided. The retaining element (30) may comprise an accommodating portion (32) for the bracket curve (6). The retaining element (30) may have two holding arms (31) which are spaced apart from each other, which are connected by means of a base (33) at rear ends of the holding arms facing the accommodating portion (32), and which define at front ends (34) a mounting mouth (35) which can be slipped onto the plug-in nipple (2) and/or the plug-in sleeve (3) in a transverse manner with respect to the plug-in axis (S) of the plug-in connection (10).

The invention relates to the use of a zinc-oxide-containing frit, having a ZnO content of 20 to 75% by weight and an average grain size of less than 30 μm, as a UV-light-absorbing UV protection means for e.g. applications in thermoplastically deformable plastics, solvent- and water-containing and radiation-curing paints, powder paints, paper coatings, and hydraulically bound construction products.