CN105291257A - Still kettle system for producing ardealite steam-pressing bricks - Google Patents

Abstract

The invention discloses an autoclave system for producing phosphogypsum autoclaved bricks, comprising a heat total steam source header, an autoclave A, an autoclave B, an autoclave C, an autoclave D, an autoclave Kettle E, steam source distribution pipe, exhaust steam distribution pipe, steam extraction pipe A, steam extraction pipe B, steam extraction pipe C, steam extraction pipe D and steam extraction pipe E, the The total steam source header is connected to the steam source distribution pipe through the steam source main valve A and the steam source main valve B respectively; the autoclave A, autoclave B, autoclave C, autoclave D and autoclave The inlet of E is respectively connected with the steam source distribution pipe and the exhaust steam distribution pipe, and the outlet is respectively connected with the steam extraction pipe A, the steam extraction pipe B, the steam extraction pipe C, the steam extraction pipe D and the steam extraction pipe The guide tube E is connected. In the present invention, the exhausted steam of the autoclave is heated and pressurized through the steam extraction pipe respectively, and then merged into the exhausted steam distribution pipe, so that the exhausted steam is recycled and not discharged, the recovery effect is better, and the purpose of maximum recovery and reuse is achieved.

Description

An autoclave system for the production of phosphogypsum autoclaved bricks

technical field

The invention belongs to the technical field of energy-saving and environment-friendly production of building materials, and in particular relates to an autoclave system for producing phosphogypsum autoclaved bricks.

Background technique

With the rapid development of phosphating enterprises, the phosphogypsum waste produced by the production of phosphoric acid will increase year by year. The open-air storage of waste residue not only occupies land, but also poses environmental risks. The state should gradually restrict and eventually ban the use of solid clay bricks, promote the application of new technologies and new products of energy-saving and waste-saving new wall materials, and promote energy conservation and consumption reduction in the new wall material industry. This shows that the national level has begun to restrict and prohibit the use of solid clay bricks. The research on the comprehensive utilization of phosphogypsum in my country began in the 1960s, mainly as a raw material for chemical production. Due to the excess of phosphogypsum residual phosphorus and other indicators, its popularization and application are limited, so phosphogypsum has not yet been developed and utilized in large quantities. Open-air stacking not only takes up a lot of land, but also easily pollutes soil, surface water and groundwater. It has become one of the problems faced by phosphorus chemical enterprises.

In order to solve the above problems, combined with the policy that the country will gradually restrict and eventually ban the use of solid clay bricks, people have started to use phosphogypsum as a raw material for building materials, hoping to develop in the field of building materials. At present, the progress is relatively smooth, and it has been solved that phosphogypsum bricks have poor water resistance and acid corrosion resistance, low strength, large shrinkage, but high energy consumption and low added value still exist. However, considering the comprehensive economic benefits of the enterprise, As well as the needs of survival and development, it is still very attractive. Therefore, domestic large-scale phosphate fertilizer companies are stepping up their own research and development. With the continuous deepening of technical research, the comprehensive performance of the product has made great progress. For example, the Chinese patent publication number CN103641426A discloses a method for making high-strength phosphogypsum bricks, which has low cost, good water resistance and acid corrosion resistance, a softening coefficient of 0.85-0.95, and a high strength of 30-45 MPa; rate is less than 20%. As a new type of wall material, phosphogypsum bricks have the characteristics of short production cycle, high strength, and good water resistance. They are expected to replace solid clay bricks and shale bricks and are widely used in the construction field. However, in terms of energy saving, most of the exhaust steam in the reaction kettles for making phosphogypsum bricks is empty, resulting in a serious waste of exhaust steam; in order to improve the utilization rate of exhaust steam, a Chinese patent with a publication number of CN203650680U discloses a steam Energy-saving autoclave curing device for aerated concrete blocks. This device operates several autoclaves in series, and uses the exhaust steam of the upper autoclave as the preheating steam of the lower autoclave. This method is recovered by natural pressure drop. The exhaust steam is not complete, and there is still a large amount of high-pressure exhaust steam that needs to be discharged. The fewer the number of autoclaves, the lower the utilization rate of exhaust steam, which is a waste of energy quality and quantity. At the same time, high-temperature steam venting will cause environmental damage Noise pollution, high-temperature soda may also hurt people, and the exhaust steam produced by phosphogypsum autoclave still has corrosive impurities, which poses serious safety hazards; therefore, how to completely recover and effectively utilize these exhaust steam is an urgent problem to be solved at present.

Contents of the invention

In order to solve the above problems, the present invention provides an energy-saving self-use device for autoclaves of phosphogypsum bricks. In this way, the energy quality of exhaust steam can be effectively reused, and environmental noise pollution can be avoided at the same time. It is applicable to a wide range of exhaust steam, especially for industrial devices with large exhaust steam, which greatly reduces production costs.

The present invention is achieved through the following technical solutions.

An autoclave system for producing phosphogypsum autoclaved bricks, including a heat total steam source header, autoclave A, autoclave B, autoclave C, autoclave D, autoclave E, steam Source distribution pipe, exhaust steam distribution pipe, steam extraction pipe A, steam extraction pipe B, steam extraction pipe C, steam extraction pipe D and steam extraction pipe E, the total steam source set The tanks are respectively connected to the steam source distribution pipe through the main steam source valve A and the main steam source valve B; the inlets of the autoclave A, autoclave B, autoclave C, autoclave D and autoclave E are respectively It is connected with steam source distribution pipe and exhaust steam distribution pipe, and the outlet is respectively connected with steam extraction pipe A, steam extraction pipe B, steam extraction pipe C, steam extraction pipe D and steam extraction pipe E .

The inlet of the autoclave A is connected with No. 1 valve C and No. 1 valve E at the same time, and the outlet is connected with the steam extraction pipe A through the No. 1 valve B; the inlet of the steam extraction pipe A is connected with the No. 1 valve respectively. Valve B is connected to No. 1 valve D, and the outlet is connected to the exhaust steam distribution pipe through No. 1 valve A.

The inlet of the autoclave B is connected with No. 2 valve C and No. 2 valve E at the same time, and the outlet is connected with the steam extraction pipe B through the No. 2 valve B; the inlet of the steam extraction pipe B is connected with the No. 2 valve respectively. Valve B is connected to No. 2 valve D, and the outlet is respectively connected to No. 1 valve C and No. 2 valve A through No. 2 valve F. No. 1 valve C enters the steam inlet pipe of autoclave A, and No. 2 valve A enters the exhaust steam Dispensing tube.

The inlet of the autoclave C is connected with No. 3 valve C and No. 3 valve E at the same time, and the outlet is connected with the steam extraction pipe C through the No. 3 valve B; the inlet of the steam extraction pipe C is connected with the No. 3 valve respectively. Valve B is connected to No. 3 valve D, and the outlet is respectively connected to No. 2 valve C and No. 3 valve A through No. 3 valve F. No. 2 valve C enters the steam inlet pipe of autoclave B, and No. 3 valve A enters the exhaust Dispensing tube.

The inlet of the autoclave D is connected with No. 4 valve C and No. 4 valve E at the same time, and the outlet is connected with the steam extraction pipe D through the No. 4 valve B; Valve B is connected to No. 4 valve D, and the outlet is respectively connected to No. 3 valve C and No. 4 valve A through No. 4 valve F. No. 3 valve C enters the steam inlet pipe of autoclave C, and No. 4 valve A enters the exhaust steam Dispensing tube.

The inlet of the autoclave E is connected with No. 5 valve C and No. 5 valve E at the same time, and the outlet is connected with the steam extraction pipe E through the No. 5 valve B; the inlet of the steam extraction pipe E is connected with the No. 5 valve respectively. Valve B is connected to No. 5 valve D, and the outlet is respectively connected to No. 4 valve C and No. 5 valve A through No. 5 valve F. No. 4 valve C enters the steam inlet pipe of autoclave D, and No. 5 valve A enters the exhaust steam Dispensing tube.

Several steam traps are also arranged on the exhaust steam distribution pipe.

The exhaust steam distribution pipe is connected with the steam inlet pipe of the autoclave E through No. 5 valve G and No. 5 valve C respectively.

The beneficial effects of the present invention are:

In the present invention, several autoclaves are installed side by side, and the higher-pressure exhaust steam in the first autoclave is used as the preheating steam of the second autoclave through natural discharge, and then the lower pressure steam in the first autoclave is used as preheating steam. The pressure exhausted steam is completely recovered through the steam extraction pipe to increase the temperature and pressure, and is used as the preheated steam of the third autoclave, which is recycled and not discharged. The device is used for the energy recovery of exhausted steam in phosphogypsum autoclaved brick reverse autoclave, which can not only realize the complete recovery of exhausted steam, but also has the advantages of reducing the energy consumption of exhausted steam recovery, and can improve the quality of energy consumption, so that the quality of energy consumption of exhausted steam can be optimized. Effective reuse, while avoiding environmental noise pollution, it is suitable for a wide range of exhaust steam, especially for industrial devices with large exhaust steam, which greatly reduces production costs.

Compared with the prior art, the present invention raises the temperature and pressure of the exhaust steam in the autoclave respectively through the steam extraction pipe, and then flows into the exhaust steam distribution pipe, and then sequentially introduces the exhaust steam into the reverse autoclave that needs to be preheated for preheating. The above-mentioned measures effectively reduce the waste of steam, make the exhaust steam recovery effect better, and achieve the purpose of maximum recovery and reuse. It realizes not only improving the quality of energy consumption, but also increasing the quantity of energy consumption, thereby reducing the original new steam consumption, saving energy, and avoiding environmental pollution at the same time.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

In the figure: 1- total steam source header, 2- autoclave A, 3- autoclave B, 4- autoclave C, 5- autoclave D, 6- autoclave E, 11- steam source Main valve A, 12-steam source main valve B, 13-steam source distribution pipe, 14-exhaust steam distribution pipe, 15-steam trap, 21-steam extraction pipe A, 22-No. 1 valve A, 23-one No. valve B, 24- No. 1 valve C, 25- No. 1 valve D, No. 1 valve E26, 31- steam extraction pipe B, 32- No. 2 valve A, 33- No. 2 valve B, 34- No. 2 Valve C, 35-No. 2 valve D, 36-No. 2 valve E, 37-No. 2 valve F, 41-steam extraction pipe C, 42-No. 3 valve A, 43-No. 3 valve B, 44-Three No. valve C, 45-No. 3 valve D, 46-No. 3 valve E, 47-No. 3 valve F, 51-steam extraction pipe D, 52-No. 4 valve A, 53-No. 4 valve B, 54- No. 4 valve C, 55-No. 4 valve D, 56-No. 4 valve E, 57-No. 4 valve F, 61-steam extraction pipe E, 62-No. 5 valve A, 63-No. 5 valve B, 64 -No.5 valve C, 65-No.5 valve D, 66-No.5 valve E, 67-No.5 valve F, 68-No.5 valve G.

detailed description

The technical solution of the present invention is further described below in conjunction with the accompanying drawings, but the scope of protection is not limited to the description.

As shown in Fig. 1, a kind of autoclave system for producing phosphogypsum autoclaved brick according to the present invention comprises heat total steam source header 1, autoclave A2, autoclave B3, autoclave C4 , autoclave D5, autoclave E6, steam source distribution pipe 13, exhaust steam distribution pipe 14, steam extraction pipe A21, steam extraction pipe B31, steam extraction pipe C41, steam extraction pipe D51 and steam extraction pipe E61, the total steam source header 1 is connected to the steam source distribution pipe 13 through the steam source main valve A11 and the steam source main valve B12 respectively; the autoclave A2, autoclave B3, steam The inlets of autoclave C4, autoclave D5 and autoclave E6 are respectively connected with steam source distribution pipe 13 and exhaust steam distribution pipe 14, and the outlets are respectively connected with steam extraction pipe A21, steam extraction pipe B31, steam extraction pipe The introduction pipe C41, the steam extraction pipe D51 and the steam extraction pipe E61 are connected.

The inlet of the autoclave A2 is connected to No. 1 valve C24 and No. 1 valve E26 at the same time, and the outlet is connected to the steam extraction pipe A21 through the No. 1 valve B23; the inlet of the steam extraction pipe A21 is connected to the No. 1 valve respectively. The valve B23 is connected to the No. 1 valve D25, and the outlet is connected to the exhaust steam distribution pipe 14 through the No. 1 valve A22.

The inlet of the autoclave B3 is connected with the No. 2 valve C34 and the No. 2 valve E36 at the same time, and the outlet is connected with the steam extraction pipe B31 through the No. 2 valve B33; Valve B33 is connected to No. 2 valve D35, and the outlet is respectively connected to No. 1 valve C24 and No. 2 valve A32 through No. 2 valve F37. No. 1 valve C24 enters the steam inlet pipe of autoclave A2, and No. 2 valve A32 enters the exhaust steam Distribution pipe 14.

The inlet of the autoclave C4 is connected with No. 3 valve C44 and No. 3 valve E46 at the same time, and the outlet is connected with the steam extraction pipe C41 through the No. 3 valve B43; the inlet of the steam extraction pipe C41 is respectively connected with the No. 3 valve Valve B43 is connected to No. 3 valve D45, and the outlet is respectively connected to No. 2 valve C34 and No. 3 valve A42 through No. 3 valve F47. No. 2 valve C34 enters the steam inlet pipe of autoclave B3, and No. 3 valve A42 enters the exhaust steam Distribution pipe 14.

The inlet of the autoclave D5 is connected with No. 4 valve C54 and No. 4 valve E56 at the same time, and the outlet is connected with the steam extraction pipe D51 through the No. 4 valve B53; the inlet of the steam extraction pipe D51 is respectively connected with the No. 4 valve Valve B53 is connected to No. 4 valve D55, and the outlet is respectively connected to No. 3 valve C44 and No. 4 valve A52 through No. 4 valve F57. No. 3 valve C44 enters the steam inlet pipe of autoclave C4, and No. 4 valve A52 enters the exhaust steam Distribution pipe 14.

The inlet of the autoclave E6 is connected with No. 5 valve C64 and No. 5 valve E66 at the same time, and the outlet is connected with the steam extraction pipe E61 through the No. 5 valve B63; the inlet of the steam extraction pipe E61 is respectively connected with the No. 5 valve Valve B63 is connected to No. 5 valve D65, and the outlet is respectively connected to No. 4 valve C54 and No. 5 valve A62 through No. 5 valve F67. No. 4 valve C54 enters the steam inlet pipe of autoclave D5, and No. 5 valve A62 enters the exhaust steam Distribution pipe 14.

Several drain valves 15 are also arranged on the exhaust steam distribution pipe 14 .

The exhaust steam distribution pipe 14 is connected to the steam inlet pipe of the autoclave E6 through the fifth valve G68 and the fifth valve C64 respectively.

The present invention has a simple, compact, reasonable and easy-to-operate structure; since the total steam source header is connected to the steam source distribution pipe 13 through the steam source main valve A11 and the steam source main valve B12 at the same time; the autoclave A2 and the autoclave B3 , autoclave C4, autoclave D5 and autoclave E6 are respectively connected to steam source distribution pipe 13 and exhaust steam distribution pipe 14, and the outlets are respectively connected to steam extraction pipe A21, steam extraction pipe B31, steam The steam extraction pipe C41, the steam extraction pipe D51 and the steam extraction pipe E61 are connected; by arranging several autoclaves side by side, the exhaust steam of the autoclave is sucked into the steam extraction pipe twice, and the high pressure exhaust The steam passes through the steam extraction pipe (without opening high-pressure steam) and directly enters the next kettle by natural decompression for preheating in the high-pressure stage; the remaining exhaust steam after natural decompression passes through the steam extraction pipe (opening high-pressure steam) to heat up After boosting, it flows into the exhaust steam distribution pipe, and then the exhaust steam is sequentially introduced into the anti-autoclave that needs to be preheated for preheating. It can be recycled without discharge, which solves the problem of incomplete recovery and utilization of exhaust steam, and improves the energy quality of exhaust steam. Get the most effective reuse and avoid environmental pollution at the same time. It is suitable for a wide range of exhaust steam, especially for installation systems with large exhaust steam emissions. It solves the defects such as the limited recovery and utilization of exhaust steam, and achieves the purpose of recovery and reuse. Save energy and reduce the total cost of production. It is suitable for the transformation of various types of autoclave exhaust steam recovery devices at present, and its environmental and economic effects are remarkable. It has the advantages of wide application range, good promotion prospect and long service life, etc., and is especially suitable for wide popularization and application in the technical fields of new construction and renovation of large-scale phosphogypsum brick autoclave systems.

Claims (8)

1. the still kettle system for the production of ardealite steam-pressing brisk, it is characterized in that: comprise total vapour source header (1) of heat, still kettle A (2), still kettle B (3), still kettle C (4), still kettle D (5), still kettle E (6), vapour source distributing pipe (13), exhaust steam distributing pipe (14), vapour vapour takes out skirt A (21), vapour vapour takes out skirt B (31), vapour vapour takes out skirt C (41), vapour vapour takes out skirt D (51) and vapour vapour takes out skirt E (61), described total vapour source header (1) is connected with vapour source distributing pipe (13) with vapour source main valve B (12) respectively by vapour source main valve A (11), the import of described still kettle A (2), still kettle B (3), still kettle C (4), still kettle D (5) and still kettle E (6) is connected with exhaust steam distributing pipe (14) with vapour source distributing pipe (13) respectively, and outlet takes out skirt A (21) with vapour vapour respectively, vapour vapour takes out skirt B (31), vapour vapour takes out skirt C (41), vapour vapour takes out skirt D (51) and vapour vapour is taken out skirt E (61) and is connected.

2. a kind of still kettle system for the production of ardealite steam-pressing brisk according to claim 1, it is characterized in that: the import of described still kettle A (2) is connected with a valve E (26) with a valve C (24) simultaneously, export and take out skirt A (21) by a valve B (23) and vapour vapour and be connected; The import that described vapour vapour takes out skirt A (21) is connected with a valve D (25) with a valve B (23) respectively, exports and is connected with exhaust steam distributing pipe (14) by a valve A (22).

3. a kind of still kettle system for the production of ardealite steam-pressing brisk according to claim 1, it is characterized in that: the import of described still kettle B (3) is connected with No. two valve E (36) with No. two valve C (34) simultaneously, export and take out skirt B (31) by No. two valve B (33) and vapour vapour and be connected; The import that described vapour vapour takes out skirt B (31) is connected with No. two valve D (35) with No. two valve B (33) respectively, outlet is connected with No. two valve A (32) with a valve C (24) respectively by No. two valve F (37), enter still kettle A (2) steam inlet pipe by a valve C (24), enter exhaust steam distributing pipe (14) by No. two valve A (32).

4. a kind of still kettle system for the production of ardealite steam-pressing brisk according to claim 1, it is characterized in that: the import of described still kettle C (4) is connected with No. three valve E (46) with No. three valve C (44) simultaneously, export and take out skirt C (41) by No. three valve B (43) and vapour vapour and be connected; The import that described vapour vapour takes out skirt C (41) is connected with No. three valve D (45) with No. three valve B (43) respectively, outlet is connected with No. three valve A (42) with No. two valve C (34) respectively by No. three valve F (47), enter still kettle B (3) steam inlet pipe by No. two valve C (34), enter exhaust steam distributing pipe (14) by No. three valve A (42).

5. a kind of still kettle system for the production of ardealite steam-pressing brisk according to claim 1, it is characterized in that: the import of described still kettle D (5) is connected with No. four valve E (56) with No. four valve C (54) simultaneously, export and take out skirt D (51) by No. four valve B (53) and vapour vapour and be connected; The import that described vapour vapour takes out skirt D (51) is connected with No. four valve D (55) with No. four valve B (53) respectively, outlet is connected with No. four valve A (52) with No. three valve C (44) respectively by No. four valve F (57), enter still kettle C (4) steam inlet pipe by No. three valve C (44), enter exhaust steam distributing pipe (14) by No. four valve A (52).

6. a kind of still kettle system for the production of ardealite steam-pressing brisk according to claim 1, it is characterized in that: the import of described still kettle E (6) is connected with No. five valve E (66) with No. five valve C (64) simultaneously, export and take out skirt E (61) by No. five valve B (63) and vapour vapour and be connected; The import that described vapour vapour takes out skirt E (61) is connected with No. five valve D (65) with No. five valve B (63) respectively, outlet is connected with No. five valve A (62) with No. four valve C (54) respectively by No. five valve F (67), enter still kettle D (5) steam inlet pipe by No. four valve C (54), enter exhaust steam distributing pipe (14) by No. five valve A (62).

7. a kind of still kettle system for the production of ardealite steam-pressing brisk according to claim 1, is characterized in that: described exhaust steam distributing pipe (14) is also provided with some drain valves (15).

8. a kind of still kettle system for the production of ardealite steam-pressing brisk according to claim 6, is characterized in that: described exhaust steam distributing pipe (14) is connected with still kettle E (6) steam inlet pipe with No. five valve C (64) respectively by No. five valve G (68).