CN2423273Y - calcium nitrite absorption plant - Google Patents
calcium nitrite absorption plant Download PDFInfo
- Publication number
- CN2423273Y CN2423273Y CN 00231426 CN00231426U CN2423273Y CN 2423273 Y CN2423273 Y CN 2423273Y CN 00231426 CN00231426 CN 00231426 CN 00231426 U CN00231426 U CN 00231426U CN 2423273 Y CN2423273 Y CN 2423273Y
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- CN
- China
- Prior art keywords
- liquid
- tower
- absorption tower
- absorption
- gas
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Abstract
The utility model relates to a calcium nitrite absorbing device which comprises a plurality of absorption towers. The utility model is characterized in that the bottom end of each adsorption tower is provided with a gas inlet and a liquid outlet, and the top end of each adsorption tower is provided with a gas outlet and a liquid inlet; the gas outlet of the front absorption tower is connected with the gas inlet of the back absorption tower, and the liquid inlet of the front absorption tower is connected with the liquid outlet of the back absorption tower. Compared with the prior art, the utility model has the advantages of improved quality of products, reduced cost and convenient operation and maintenance, and NO< X > contained in discharged tail gas can reach standards.
Description
The utility model relates to the absorption unit of a kind of production equipment of calcium nitrite, particularly a kind of calcium nitrite.
Calcium nitrite is a kind of inorganic chemical product that China's chemical industry forms scale production in recent years, and main application is as hardening accelerator in the concrete admixture and frostproofer, to replace Sodium Nitrite.Its extensive market has good prospects.Its production technique is: utilize aqua calcis to absorb nitrogen oxide gas in the absorption tower and produce neutralizer, after filtration, clarification, concentrate, crystallization, remove free-water and make the granular product that has crystal water, its chemical molecular formula is Ca (NO
2)
2NH
2O, n=2～4.This production technique, equipment are all simpler, and material cost is low.Its main production process is to absorb operation, but following deficiency is arranged:
1, in absorption process, being several towers absorbs by tower, by tower discharging neutralizer, Ca (NO in the neutralizer of each tower discharging
2)
2Content be difficult to control, quality instability, and raw materials consumption is big, when tailing column solution absorption during to finite concentration, specific absorption descends, and can cause that nitrogen oxide exceeds standard in the exhaust, causes topsoil.
2, to include cooling be coil tube type with heat exchanger to tower, and it is little to be limited to the interior space of tower, and coil pipe can not satisfy big load production or the heat exchange when producing summer, and Yin Wendu can fall and influences the absorption reaction effect sometimes, and the tower inner structure is not easy to Operation and maintenance.
3, the fence type grate plate contact area in the tower is little, influences assimilation effect.
Therefore this technology its quality of goods of producing is stable inadequately, manufacturing cost is higher, operation of equipment, maintenance difficulty, and discharging tail gas contains NO
xExceed standard.
The purpose of this utility model provides a kind of absorption unit of calcium nitrite, and it can solve above-mentioned technology weak point, compares with original process unit, and the quality of item of its production improves, and cost reduces, operation of equipment, easy to maintenance.And discharging tail gas contains NO
xUp to standard.
The purpose of this utility model realizes by following technical scheme.A kind of absorption unit of calcium nitrite, comprise several absorption towers, it is characterized in that: described each absorption tower all has gas inlet and liquid exit in the bottom, have pneumatic outlet and liquid inlet on the top, the pneumatic outlet on preceding absorption tower links to each other through tracheae with the gas inlet of post-absorption tower, and the liquid inlet on preceding absorption tower links to each other through the liquid pipe with the liquid exit of post-absorption tower.On the liquid pipe of the liquid inlet on described each absorption tower, liquid pump is housed.On the liquid pipe between the liquid inlet on described liquid pump and described absorption tower, interchanger is housed.In described each absorption tower, have the several layers support, some porous porcelain filler pieces are housed on support.Principle of work of the present utility model is to spray into Ca (OH) downwards from cat head
2Solution.At the bottom of tower, upwards send into NO
xGas makes the two chemical reaction in the absorption tower generate Ca (NO
2)
2, and reacted gas entered atmosphere.This device improvements are:
What 1, change was original absorbs nitrogen oxide by tower, pursues the mode of tower discharging neutralizer,, is changed into only in tailing column adding aqua calcis, the mode of only discharging neutralizer at first tower by the tower discharging respectively from each tower adding by aqua calcis.Sending into nitrogen oxide gas from first tower, make the nitrogen oxide gas amount maximum in the first tower, and the calcium hydroxide content in the solution in the first tower is minimum, all is nitrous acid calcium solution with the neutralizer that guarantees discharging.The aqua calcis that tailing column is sent into is absorbed by tower by the intermediary tower, makes tailing column keep the maximum absorption degree, keeps exhaust emissions up to standard.The operation control of this method is improved the quality of products, is reduced cost easily.
2, cooling heat exchanger is contained in outside the tower, in operation, can regulate rate-of flow in this interchanger according to the height of absorption liquid temperature, reaches best effect, and operating maintenance is convenient.
3, the tower inner grate plate adopts support, and a chain of shape porcelain filler of placing porous on the support improves gas, liquid contact area, and resistance does not increase, and does not stop up, and has improved assimilated efficiency and speed.
In sum, the utility model makes only at first tower discharging neutralizer, only in the tailing column emission gases because the liquid road connecting mode between each tower in absorption unit changes series connection into, remaining reaction is all carried out in middle each tower, has guaranteed the raising of neutralizer quality and has not had exhaust emission.The outside dress of this external tower interchanger makes it not be subjected to space constraint in the tower, can interchanger be set according to the heat dissipation capacity needs, and easy to maintenance, adopt the porous porcelain filler, both avoided stopping up, improved the gas, liquid contact area again, improved specific absorption and absorption rate.Therefore, its quality of item improves, and cost reduces, and operation of equipment is easy to maintenance, and discharging tail gas contains NO
xUp to standard.
Specify with embodiment below in conjunction with accompanying drawing.
Fig. 1 is a synoptic diagram of the present utility model,
Fig. 2 is the A-A cutaway view Amplified image among Fig. 1,
Fig. 3 is the B-B sectional view among Fig. 2.
Code name among the figure: 1,2,3,4 absorption towers 11,21,31,41 pneumatic outlet 12A, 22A, 32A, 42A liquid pipe 12,22,32,42 interchanger 13,23,33,43 liquid pumps 14,24,34,44 valves 15,25,35,45 liquid exit 25A, 35A, 45A liquid pipe 16,26,36,46 support 16A filling blocks 17,27,37,47 gas inletes 18,28,38,48 liquid go into 19,29,39,49 tracheae K cooling water inlet K
1Cooling water outlet LCa (OH)
2Liquid L
1Ca (NO
2)
2Liquid MNO
xGas M
1Tail gas
As Fig. 1, the utility model absorption unit comprises 4 groups of absorption towers 1,2,3,4, each tower all has gas inlet 17 in the bottom, 27,37,47 and liquid exit 15,25,35,45, all has pneumatic outlet 11 on the top, 21,31,41 and liquid inlet 18,28,38,48, the pneumatic outlet of preceding tower links to each other through tracheae with the gas inlet of back tower, for example the pneumatic outlet 11 on absorption tower 1 links to each other through tracheae 19 with the gas inlet 27 of back tower 2, the liquid inlet 18 on absorption tower 1 and the liquid exit 25 on absorption tower 2 are through liquid pipe 25A, 12A links to each other, remaining absorption tower 2, between 3, absorption tower 3, also connect in a manner described between 4.On the liquid pipe 12A of the liquid inlet 18,28,38,48 on each absorption tower 1,2,3,4,22A, 32A, 42A, liquid pump 13,23,33,43 is housed.Between each liquid pump 13,23,33,43 and each liquid inlet, absorption tower 18,28,38,48, shell and tube heat exchanger 12,22,32,42 is housed.In described each absorption tower, all have several layers support 16,26,36,46,, several porous porcelain filler pieces 16A is housed on each support as Fig. 2.As Fig. 3, the filling block 16A that present embodiment adopts is commercially available SK catenated form, is tubular spare, has hole 16B on hole wall.When using, 1 the gas inlet 17 logical NO from the absorption tower
xGas M, enter absorption tower 2 through pneumatic outlet 11, tracheae 19, gas inlet 27, enter absorption tower 3 through pneumatic outlet 21, tracheae 29, gas inlet 37, enter absorption tower 4, discharge and do not contain NO through venting port 41, tracheae 49 through pneumatic outlet 31, tracheae 39, gas inlet 47
xGas M
1Ca (OH)
2The route of liquid L is: through liquid pump 43 interchanger 42, liquid pipe 42A, 4 liquid inlet 48 sprays into Ca (OH) from the absorption tower
2Liquid L, the valve 14,24,34,44 in the pipeline is closing condition at this moment, and the liquid that liquid pump is sent can only enter in the corresponding absorption tower 1,2,3,4 Ca (OH) through liquid pump 13,23,33,43
2The distance of liquid L and gas NO
xIt is opposite to send into direction, 4 the relief outlet 45 through the absorption tower, liquid pump 33, interchanger 32 enter absorption tower 3, enter absorption tower 2 through relief outlet 35, liquid pump 23, interchanger 22,28 enter from the liquid inlet, discharge from leakage fluid dram 25, enter into absorption tower 1, discharge qualified Ca (NO through leakage fluid dram 15 through liquid pump 13, interchanger 12
2)
2Liquid L
1, in each absorption tower, carry out chemical reaction, with Ca (OH)
2Absorption of N O
xGas is because the NO that sends in absorption tower 1
xGas is the denseest, has guaranteed discharge Ca (NO
2)
2Liquid L
1Quality, and at the gas outlet of absorption tower tailing column 4, because the Ca (OH) that sprays into from here
2L is the denseest for liquid, so make the tail gas M that discharges from venting port 41
1In do not contain NO
x, polluted air not.The diagram water coolant enters from cooling water inlet K, through the Ca (OH) of each interchanger 12,22,32,42 with conveying
2After the liquid cooling but, from cooling water outlet K
1Discharge.
Claims (4)
1, a kind of absorption unit of calcium nitrite, comprise several absorption towers, it is characterized in that: described each absorption tower all has gas inlet and liquid exit in the bottom, have pneumatic outlet and liquid inlet on the top, the pneumatic outlet on preceding absorption tower links to each other through tracheae with the gas inlet of post-absorption tower, and the liquid inlet on preceding absorption tower links to each other through the liquid pipe with the liquid exit of post-absorption tower.
2, the absorption unit of calcium nitrite according to claim 1 is characterized in that: on the liquid pipe of the liquid inlet on described each absorption tower liquid pump is housed.
3, the absorption unit of calcium nitrite according to claim 2 is characterized in that: on the liquid pipe between the liquid inlet on described liquid pump and described absorption tower interchanger is housed.
4, the absorption unit of calcium nitrite according to claim 1 is characterized in that: have the several layers support in described each absorption tower, some porous porcelain filler pieces are housed on support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00231426 CN2423273Y (en) | 2000-04-05 | 2000-04-05 | calcium nitrite absorption plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00231426 CN2423273Y (en) | 2000-04-05 | 2000-04-05 | calcium nitrite absorption plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2423273Y true CN2423273Y (en) | 2001-03-14 |
Family
ID=33594322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00231426 Expired - Fee Related CN2423273Y (en) | 2000-04-05 | 2000-04-05 | calcium nitrite absorption plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2423273Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106629805A (en) * | 2016-10-17 | 2017-05-10 | 交城县三喜化工有限公司 | Method and device for producing calcium nitrate liquid |
-
2000
- 2000-04-05 CN CN 00231426 patent/CN2423273Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106629805A (en) * | 2016-10-17 | 2017-05-10 | 交城县三喜化工有限公司 | Method and device for producing calcium nitrate liquid |
| CN106629805B (en) * | 2016-10-17 | 2017-11-21 | 交城县三喜化工有限公司 | A kind of method and its device for producing calcium nitrate liquid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |