Vacuum Pump Paper Industry

Vacuum pump is a common vacuum equipment in paper mill equipment. The commonly used type is 2SK liquid ring vacuum pump, but 2SK liquid ring vacuum pump, which consumes high energy and has low efficiency. It is an old type. The 2BV liquid ring vacuum pump or 2be liquid ring vacuum pump produced by EVP vacuum pump manufacturer is a kind of vacuum pump with high cost performance, low energy consumption and high efficiency. At present, 2BV liquid ring vacuum pump or 2BE liquid ring vacuum pump are used in most large papermaking plants.

vacuum pump in paper industry is as follows:

Liquid ring vacuum pump for black liquor evaporation

Black liquor evaporator in pulp mill is used to concentrate black liquor produced in pulp cleaning process so that these liquids can be recovered in the recovery furnace and reused in pulp production.

liquid ring vacuum pump used in crude pulp washer

Prior to bleaching or other raw material preparation, the pulp washer removes Pulp Chemicals (“black liquor”) from paper-making raw materials. Rough pulp washer is a typical horizontal drum filter. The drum-shaped cavity can produce vacuum. When the drum rotates in the raw material pulp, vacuum can make the raw material adhere to the outer surface of the drum and help remove (clean) black liquor from the raw material.

Liquid ring vacuum pump for lime slurry and filter

Lime slurry filters in pulp mills are used to recover lime during white water clarification. Similar to the crude pulp washer, the lime mud filter is a typical horizontal drum filter. Vacuum can be generated inside the drum. When the drum rotates in the lime mud, a lime cake forms on the outer surface of the drum. Then scrape it off and reuse it in whitewater process.

Liquid Ring Vacuum Pump for Precipitate Filter

Precipitate filters in pulp mills are used to filter unburned suspended particles in “green liquor”, remove carbon particles for full combustion, iron compounds and insoluble furnace debris prior to denaturation. The sediment filter is a typical horizontal drum filter. A vacuum can be created inside the drum to extract particles from green liquor.

liquid ring vacuum pump for vacuum dehydrator

The dehydrator is used to dehydrate the raw material in the preparation stage to increase the concentration of the raw material. The dehydrator is a typical horizontal drum filter, which is used to dehydrate pulp proportionally to increase the concentration of raw materials.

Liquid Ring Vacuum Pump for Raw Material and White Water Degassing System

Raw materials and white water degassing system are used in the preparation stage of raw materials to remove air carried by raw materials or air from diluted water before entering the mixing box. Material and white water degassing systems are very important because air is removed from paper-making raw materials, which can lead to pinholes on paper, and greatly affect the printing quality, mechanical properties and overall quality.

This degassing system is a typical two-stage vacuum system: the boiling point of raw materials at the inlet of the first vacuum pump (27-28 in. HgV), and the compression ratio of the inlet pressure of the second vacuum pump (4:1). The pre-condenser is typically used between the degassing vessel and the first vacuum pump, and a small inter-stage separator is required between the two vacuum pumps. Vacuum pumps are made of standard materials.

Liquid ring vacuum pump for headbox compressor

The mixing box compressor/vacuum pump is applied in the “air cushion” mixing box to produce a pressure/vacuum above the raw material level (or “raw material pool”) of the mixing box to maximize the control of the raw material discharge speed (“injection” speed).

Vacuum pumps are usually used as vacuum pumps and compressors through a series of valves. Vacuum or pressure is generated in the void volume above the “raw material pool”, which is used to control the static head of the mixing box.

Liquid ring vacuum pump for suction tank

The suction tank is a static device, which dehydrates directly from the pulp on the forming section of the paper machine. There are usually 2-10 suction tanks on paper machines, usually connected into a main pipe. Because of the large amount of dehydration, it is necessary to install a pre-separator between the suction tank and the vacuum box. The liquid ring pump is used to generate vacuum in the suction tank vacuum box.

liquid ring vacuum pump for rollers

In many cases, the roller is the last vacuum point on the forming section, which is called the most important dehydration part of the paper machine. The dryness of paper affects the dehydration performance and steam consumption of the press section when the roll is released and enters the press section.

The couch rollers are stationary, with rotating holes in the housing. The roller can have one or two vacuum areas.

Suction roll and transfer roll

The suction roller sucks the paper away from the mesh on the forming step and leads it into the pressing section. Then, in the press section, the transfer roll transfers the paper from one wool cloth to another. These processes are not formally dehydrated, but a small amount of water can be removed from the paper.

Liquid Ring Vacuum Pump for Vacuum Compression

Vacuum press uses mechanical method to extract water from paper. In the pressing section, the rollers with granite and hard rubber surfaces are closely contacted to form a “pressing zone”. Typical paper machines may have 1-3 “pressing zones”. When the paper passes through the pressing area, the water is squeezed out and seeps into the pressed wool cloth, which is used as the transportation tool and cushion of the paper when the paper passes through the pressed part. In the process of dehydration, there are vacuum and non-vacuum rollers in the pressing section.

Liquid ring vacuum pump for wool suction tank

When the pressing part is pressed, the pressed fabric (or “wool”) contains a mixture of water, chemical materials, paper-making materials, clay and fillers, sticky residues (“asphalt”) produced in the paper-making process and glue (“sticky”) produced by recycled paper. Since each piece of wool is a continuous cycle, moisture and contaminants must be removed before the next press begins. The vacuum suction tank is a fixed suction tank, which exceeds the width of the wool cloth and absorbs the water and pollutants accumulated during the pressing process. Each piece of wool has two vacuum suction tanks.

When using vacuum suction tank, it must be pre-separated to avoid carrying water into the vacuum pump.

Liquid ring vacuum pump for blowout preventer

In the press section, there are some “open” press zones, which do not support the paper before entering the press zone. Air flow may cause the paper to shake, fold or break. Blow-proof boxes are fixed and are used to generate upstream vacuum in the pressing zone before paper enters. Because the blowout-proof box cloth is used for dehydration, there is no need for pre-separation treatment.

Generally speaking, the standard pumping capacity stipulated in the paper production line is certain, but in order to reduce energy consumption and save production costs, the selection of vacuum pump is particularly important. For the paper industry, the economic benefit of liquid ring vacuum pump is the preferred vacuum equipment for paper mills.

2BE1 Series Liquid Ring Vacuum Pump

Model	Speed(Driving mode)	Shaft power	Motor power	Ultimatevacuum	Max. capacity		Weight (excl.motor)
	r/min	KW	380V	hpa	M³/hr	M³/min	kg
2BE1-102	1450 (direct)1750 (V-belt)	6.08.0	Y132M-4-7.5Y160M-4-11	33hpa(-0.097MPa)	246290	4.14.8	110
2BE1-103	1450 (direct)1750 (V-belt)	8.211.1	Y160M-4-11Y160L-4-15	33hpa(-0.097MPa)	340412	5.76.9	125
2BE1-152	1450 (direct)1625 (V-belt) 1750 (V-belt)	12.515.0 17.2	Y160L-4-15Y180M-4-18.5 Y180L-4-22	33hpa(-0.097MPa)	450510 535	7.58.5 8.9	175
2BE1-153	1450 (direct)1100 (V-belt) 1300 (V-belt) 1620 (V-belt) 1750 (V-belt)	16.310.6 13.4 19.6 22.3	Y180M-4-18.5Y160L-4-15 Y180M-4-18.5 Y180L-4-22 Y200L-4-30	33hpa(-0.097MPa)	600445 535 648 700	10.07.4 8.9 10.8 11.7	200
2BE1-202	980 (direct)790 (V-belt) 880 (V-belt) 1100 (V-belt) 1170 (V-belt) 1300 (V-belt)	18.213.4 16.3 23.8 25.7 30	Y200L2-6-22Y180M-4-18.5 Y180M-4-18.5 Y200L-4-30 Y200L-4-30 Y225S-4-37	33hpa(-0.097MPa)	750590 670 860 888 950	12.59.8 11.2 14.3 14.8 15.8	460
2BE1-203	980 (direct)790 (V-belt) 880 (V-belt) 1100 (V-belt) 1170 (V-belt) 1300 (V-belt)	29.521.2 24.8 34 38 42	Y250M-6-37Y200L-4-30 Y200L-4-30 Y225M-4-45 Y225M-4-45 Y250M-4-55	33hpa(-0.097MPa)	1080870 980 1210 1320 1390	1814.5 16.3 20.2 22.0 23.2	530
2BE1-252	740 (direct)565 (V-belt) 660 (V-belt) 830 (V-belt) 885 (V-belt) 938 (V-belt)	3823.7 31.8 45 54 60	Y280M-8-45Y200L-4-30 Y225S-4-37 Y250M-4-55 Y280S-4-75 Y280S-4-75	33hpa(-0.097MPa)	17001200 1500 1770 2000 2100	28.320.0 25.0 29.5 33.3 35.0	870
2BE1-253	740 (direct)565 (V-belt) 660 (V-belt) 740 (V-belt) 792 (V-belt) 820 (V-belt) 880 (V-belt) 940 (V-belt)	5437.2 45 50.8 60 68 75.1 88	Y315M-8-75Y225M-4-45 Y250M-4-55 Y280S-4-75 Y280S-4-75 Y280M-4-75 Y280M-4-90 Y315S-4-110	33hpa(-0.097MPa)	24501690 2100 2340 2560 2640 2780 3050	40.828.2 35 39 42.7 44 46.3 50.8	930
2BE1-303	740 (direct)590 (direct) 466 (V-belt) 530 (V-belt) 583 (V-belt) 660 (V-belt) 740 (V-belt)	9865.5 48 58 64 79.8 96	Y315L2-8-110Y315L2-10-75 Y250M-4-55 Y280S-4-75 Y280S-4-75 Y280M-4-90 Y315S-4-110	33hpa(-0.097MPa)	40003200 2520 2820 3100 3550 3840	66.753.3 42 47 51.7 59.2 64	1700
2BE1-305	740 (direct)590 (direct) 490 (V-belt) 530 (V-belt) 583 (V-belt) 660 (V-belt) 740 (V-belt)	10870 55 61 68 90 110	Y355M1-8-132Y355M1-10-90 Y280S-4-75 Y280S-4-75 Y280M-4-90 Y315S-4-110 Y315M-4-132	33hpa(-0.097MPa)	45203750 3150 3380 3700 4090 4550	75.362.5 52.5 56.4 61.2 68.1 75.8	1820
2BE1-353	590 (direct)390 (V-belt) 425 (V-belt) 464 (V-belt) 530 (V-belt) 560 (V-belt) 620 (V-belt) 660 (V-belt)	12163 72 85 95 110 133 152	Y355L2-10-160Y280S-4-75 Y280M-4-90 Y315S-4-110 Y315M-4-110 Y315L1-4-132 Y315L1-4-160 Y315L2-4-185	33hpa(-0.097MPa)	53003580 3700 4100 4620 5000 5500 5850	88.359.7 61.7 68.3 77.0 83.3 91.7 97.5	2300
2BE1-355	590 (direct)390 (V-belt) 420 (V-belt) 464 (V-belt) 523 (V-belt) 590 (V-belt) 660 (V-belt)	13675 80.8 95 113 136 182	Y355L2-10-160Y280M-4-90 Y280-4-90 Y315S-4-110 Y315M-4-132 Y315L1-4-160 Y315L2-4-200	33hpa(-0.097MPa)	57004180 4260 4850 5230 6000 6510	9569.7 71 80.8 87.1 100 108	2450
2BE1-403	330 (V-belt)372 (V-belt) 420 (V-belt) 472 (V-belt) 530 (V-belt)	98110 131 160 213	Y315M-4-132Y315M-4-132 Y315L1-4-160 Y315L2-4-200 Y355M2-4-250	33hpa(-0.097MPa)	48605400 6470 7380 8100	8190 107.8 123.0 135.0	3750
2BE1-405	330 (V-belt)372 (V-belt) 420 (V-belt) 472 (V-belt) 530 (V-belt)	100118 140 170 216	Y315M-4-132Y315L1-4-160 Y315L2-4-185 Y315L2-4-200 Y355M2-4-250	33hpa(-0.097MPa)	60006700 7500 8350 9450	100.0111.7 125.0 139.2 157.5	3900

2BV Series Liquid Ring Vacuum Pump

Curve No.	Model	Max. suction capacity		Ultimate vacuum mbar(MPa)	Motor power kW	Speed r.p.m	Operating liquidflow rate L/min	Noise dB(A)	Weight kg
		m3/min	m3/h
60V	2BV2-060	0.45	27	33mbar (-0.097MPa)	0.81	2840	2.5	62	37
61V	2BV2-061	0.86	52		1.45	2840	2.5	65	41
70V	2BV2-070	1.33	80		2.35	2860	3	66	66
71V	2BV2-071	1.83	110		3.85	2880	4.7	72	85
110V	2BV5-110	2.75	165		4	1440	7.2	63	120
111V	2BV5-111	3.83	230		5.5	1440	8.8	68	150
121V	2BV5-121	4.66	280		7.5	1440	11	69	210
131V	2BV5-131	6.66	400		11	1460	16	73	280
161V	2BV5-161	8.33	500		15	970	22	74	390
110V	2BV6-110	2.75	165		4	1440	67	63	150
111V	2BV6-111	3.83	230		5.5	1440	10	68	200
121V	2BV6-121	4.66	280		7.5	1440	12	69	230
131V	2BV6-131	6.66	400		11	1460	17	73	315
161V	2BV6-161	8.33	500		15	970	23	74	426

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